/* ===== Navigation Buttons ===== */
.nav-buttons {
    text-align: center;
    margin-bottom: 20px;
}

.nav-btn {
    display: inline-block;
    padding: 10px 20px;
    margin: 5px;
    text-decoration: none;
    color: #fff;
    background: linear-gradient(135deg, #4f46e5, #6366f1);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #4338ca, #4f46e5);
}

.back-btn {
    background: linear-gradient(135deg, #6b7280, #9ca3af);
}

.back-btn:hover {
    background: linear-gradient(135deg, #4b5563, #6b7280);
}

.dark-mode-btn {
    background: linear-gradient(135deg, #1f2937, #374151);
    font-size: 16px;
}

.dark-mode-btn:hover {
    background: linear-gradient(135deg, #111827, #1f2937);
}

/* ===== Fixed Navbar ===== */
.fixed-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e7eb;
    padding: 10px 20px;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    justify-content: flex-start; /* align items from left, reduce large gaps */
    gap: 6px; /* small consistent spacing between buttons */
    align-items: center;
}

body.dark-mode .fixed-navbar {
    background: rgba(31, 41, 55, 0.95);
    border-bottom-color: #374151;
}

.fixed-navbar .nav-btn {
    margin: 0 0px;
    padding: 8px 16px;
    font-size: 13px;
    white-space: nowrap;
}

.fixed-navbar .back-btn {
    order: 0;
}

.fixed-navbar .dark-mode-btn {
    order: 2;
    margin-left: auto; /* push dark mode toggle to the far right */
}

/* ===== Dropdown Styles ===== */
.dropdown {
    order: 0;
    position: relative;
    margin-left: 2px;
    display: inline-block;
}

.dropdown-btn {
    background: linear-gradient(135deg, #4f46e5, #6366f1) !important;
    border: none !important;
    cursor: pointer;
    font-size: 13px !important;
    font-weight: 500 !important;
    padding: 8px 16px !important;
    border-radius: 8px !important;
    color: white !important;
    transition: all 0.3s ease !important;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1) !important;
}

.dropdown-btn:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 8px rgba(0,0,0,0.15) !important;
    background: linear-gradient(135deg, #4338ca, #4f46e5) !important;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-radius: 8px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
    z-index: 1001;
    min-width: 160px;
    border: 1px solid #e5e7eb;
    margin-top: 2px; /* reduce gap so pointer transitions don't close */
}

.dropdown-content a {
    color: #374151;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    border-radius: 4px;
    margin: 2px 4px;
}

.dropdown-content a:hover {
    background: linear-gradient(135deg, #4f46e5, #6366f1);
    color: white;
}

.dropdown:hover .dropdown-content,
.dropdown-content:hover,
.dropdown:focus-within .dropdown-content {
    display: block;
}


body.dark-mode .dropdown-content {
    background: rgba(31, 41, 55, 0.98);
    border-color: #374151;
}

body.dark-mode .dropdown-content a {
    color: #e5e7eb;
}

body.dark-mode .dropdown-content a:hover {
    background: linear-gradient(135deg, #8b5cf6, #a855f7);
}

/* ===== Tabs ===== */
.tab-buttons {
    display: flex;
    margin-bottom: 20px;
    border-radius: 8px;
    justify-content: space-between;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.tab-btn {
    flex: 1;
    padding: 12px;
    border: none;
    background: #e5e7eb;
    color: #374151;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: #4f46e5;
    color: white;
}

.tab-btn:hover {
    background: #d1d5db;
}

.tab-btn.active:hover {
    background: #4338ca;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ===== Error Styling ===== */
.input-error {
    border-color: #ef4444 !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1) !important;
}

.error-message {
    color: #ef4444;
    font-size: 14px;
    margin-top: 5px;
    display: none;
}

/* ===== Calculator Base Style ===== */
.percentage-calculator,
.simple-calculator,
.age-calculator,
.average-calculator,
.fraction-calculator,
.statistics-calculator,
.bmi-calculator,
.loan-calculator,
.currency-converter,
.unit-converter,
.random-number-generator,
.prime-number-checker,
.factors-multiples-calculator,
.quadratic-equation-calculator,
.number-base-converter,
.scientific-calculator,
.matrix-calculator,
.trigonometry-calculator,
.logarithm-calculator {
    max-width: 600px;
    margin: 0 auto;
    padding: 30px;
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid #e2e8f0;
    font-family: "Segoe UI", sans-serif;
    position: relative;
    overflow: hidden;
}

.percentage-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4f46e5, #6366f1, #8b5cf6);
}

.simple-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #06b6d4, #0891b2, #0e7490);
}

.age-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #ec4899, #db2777, #be185d);
}

.average-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #10b981, #059669, #047857);
}

.fraction-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #f59e0b, #d97706, #b45309);
}

.percentage-calculator h3,
.simple-calculator h3,
.age-calculator h3,
.average-calculator h3,
.fraction-calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #1e293b;
    font-size: 28px;
    font-weight: 700;
}

/* Tab buttons for percentage calculator */
.tab-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    background: #f0fdf4;
    border-radius: 10px;
    padding: 5px;
    border: 1px solid #bbf7d0;
}

.tab-btn {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    color: #065f46;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: white;
    color: #065f46;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Inputs */
.percentage-calculator label,
.simple-calculator label,
.age-calculator label,
.average-calculator label,
.fraction-calculator label {
    display: block;
    margin-bottom: 8px;
    color: #374151;
    font-weight: 600;
    font-size: 14px;
    text-align: center;
}

.percentage-calculator input,
.simple-calculator input,
.age-calculator input,
.average-calculator input,
.fraction-calculator input {
    width: 80%;
    max-width: 300px;
    padding: 12px 16px;
    border: 2px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    transition: border-color 0.3s ease;
    background: white;
    box-sizing: border-box;
}

/* Generic centering for remaining calculator inputs */
.percentage-calculator input,
.simple-calculator input,
.age-calculator input,
.average-calculator input,
.fraction-calculator input,
.random-number-generator input,
.prime-number-checker input,
.factors-multiples-calculator input,
.quadratic-equation-calculator input,
.number-base-converter input,
.statistics-calculator input,
.speed-time-distance-calculator input,
.percentage-difference-calculator input,
.profit-loss-calculator input,
.simple-interest-calculator input,
.lcm-hcf-results input,
.ratio-results input {
    width: 80%;
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    box-sizing: border-box;
}

.percentage-calculator input:focus {
    outline: none;
    border-color: #4f46e5;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.simple-calculator input:focus {
    outline: none;
    border-color: #06b6d4;
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.age-calculator input:focus {
    outline: none;
    border-color: #ec4899;
    box-shadow: 0 0 0 3px rgba(236, 72, 153, 0.1);
}

.average-calculator input:focus {
    outline: none;
    border-color: #10b981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.fraction-calculator input:focus {
    outline: none;
    border-color: #f59e0b;
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

/* Buttons */
.calc-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 15px;
}

.calc-buttons button,
.percentage-calculator button,
.simple-calculator button,
.age-calculator button,
.average-calculator button,
.fraction-calculator button {
    padding: 14px;
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.percentage-calculator button {
    width: 100%;
    background: linear-gradient(135deg, #4f46e5, #6366f1);
    margin-bottom: 20px;
}

.simple-calculator button {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
}

.age-calculator button {
    width: 100%;
    background: linear-gradient(135deg, #ec4899, #db2777);
    margin-bottom: 20px;
    max-width: fit-content;
    margin-left: 234px;
    margin-right: 230px;
}

.average-calculator button {
    width: 100%;
    max-width: fit-content;
    background: linear-gradient(135deg, #10b981, #059669);
    margin-bottom: 20px;
}

.fraction-calculator button {
    width: 100%;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    margin-bottom: 20px;
    max-width: fit-content;
    margin-left: 249px;
    margin-right: 249px;
}

.calc-buttons button:hover,
.percentage-calculator button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #4338ca, #4f46e5);
}

.simple-calculator button:hover {
    background: linear-gradient(135deg, #0891b2, #0e7490);
}

.age-calculator button:hover {
    background: linear-gradient(135deg, #db2777, #be185d);
}

.average-calculator button:hover {
    background: linear-gradient(135deg, #059669, #047857);
}

.fraction-calculator button:hover {
    background: linear-gradient(135deg, #d97706, #b45309);
}

/* Result Text */
#percentage_result,
#age_result,
#average_result,
#fraction_result,
#simple_result {
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: #1e293b;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    margin-top: 20px;
}

/* ===== Average Calculator ===== */
.input-group {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.input-group label {
    flex: 0 0 80px;
    margin-bottom: 0;
}

.input-group .number-input {
    flex: 1;
    margin-bottom: 0;
}

.remove-btn {
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    margin-left: 10px;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 10px;
    margin-bottom: 10px !important;
}

.remove-btn:hover {
    background: #dc2626;
}

/* ===== Fraction Calculator ===== */
.fraction-input {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.fraction {
    display: inline-block;
    text-align: center;
    margin: 0 10px;
}

.fraction hr {
    margin: 5px 0;
    border: none;
    border-top: 1px solid #ddd;
}

.fraction input {
    width: 60px;
    text-align: center;
    margin-bottom: 5px;
}

#operation {
    padding: 8px;
    border-radius: 5px;
    border: 1px solid #ddd;
    margin: 0 10px;
}

/* ===== Premium Keypad Calculator ===== */
.simple-calculator.keypad-calc {
    max-width: 320px;
    padding: 20px;
    background: #f0f2f5;
}

.calc-screen {
    background: #222;
    color: #fff;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    text-align: right;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 80px;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.3);
}

.calc-operation {
    font-size: 14px;
    color: #aaa;
    min-height: 20px;
}

.calc-typed {
    font-size: 32px;
    font-weight: bold;
    word-wrap: break-word;
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.calc-grid button {
    padding: 15px;
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    background: #fff;
    color: #333;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: all 0.2s;
}

.calc-grid button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
}

.calc-grid button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 3px rgba(0,0,0,0.1);
    background: #f9fafb;
}

/* Special Buttons */
.calc-grid button.btn-op {
    background: #e0e7ff;
    color: #4f46e5;
}
.calc-grid button.btn-op:hover {
    background: #c7d2fe;
}

.calc-grid button.btn-clear {
    background: #fee2e2;
    color: #ef4444;
    grid-column: span 1; /* Keep it single or make it span if desired */
}
.calc-grid button.btn-clear:hover {
    background: #fecaca;
}

.calc-grid button.btn-equal {
    grid-column: span 1;
    grid-row: span 2;
    background: #4f46e5;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
}
.calc-grid button.btn-equal:hover {
    background: #4338ca;
}

.calc-grid button.btn-zero {
    grid-column: span 2;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    body {
        padding: 100px 10px 20px 10px !important;
    }
    
    .fixed-navbar {
        padding: 8px 10px;
        flex-wrap: wrap;
        gap: 5px;
    }
    
    .fixed-navbar .nav-btn {
        margin: 2px;
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .dropdown-content {
        min-width: 140px;
    }
    
    .dropdown-content a {
        padding: 10px 12px;
        font-size: 13px;
    }
}

/* ===== Dark Mode ===== */
body.dark-mode {
    background: linear-gradient(135deg, #1f2937, #374151) !important;
    color: #f9fafb;
}

body.dark-mode .percentage-calculator,
body.dark-mode .simple-calculator,
body.dark-mode .age-calculator,
body.dark-mode .average-calculator,
body.dark-mode .fraction-calculator {
    background: #374151;
    color: #f9fafb;
}

body.dark-mode .percentage-calculator::before,
body.dark-mode .simple-calculator::before,
body.dark-mode .age-calculator::before,
body.dark-mode .average-calculator::before,
body.dark-mode .fraction-calculator::before {
    background: linear-gradient(90deg, #8b5cf6, #a855f7, #c084fc);
}

body.dark-mode #percentage_result,
body.dark-mode #age_result,
body.dark-mode #average_result,
body.dark-mode #fraction_result,
body.dark-mode #simple_result,
body.dark-mode #change_result,
body.dark-mode #square-result,
body.dark-mode #sqrt-result,
body.dark-mode #percentage_diff_result,
body.dark-mode #speed_result,
body.dark-mode #time_result,
body.dark-mode #distance_result,
body.dark-mode #profit_loss_result,
body.dark-mode #profit_percent_result,
body.dark-mode #loss_percent_result,
body.dark-mode #simple_interest_result,
body.dark-mode #principal_result,
body.dark-mode #rate_result,
body.dark-mode #time_period_result,
body.dark-mode #random_result,
body.dark-mode #prime_result,
body.dark-mode #factors_result,
body.dark-mode #multiples_result,
body.dark-mode #quadratic_result,
body.dark-mode #base_conversion_result,
body.dark-mode #statistics-result,
body.dark-mode #ratio-result,
body.dark-mode #power_result,
body.dark-mode #product_rule_result,
body.dark-mode #quotient_rule_result,
body.dark-mode #lcm-hcf-result {
    background: #374151;
    border-color: #4b5563;
    color: #f9fafb;
}

body.dark-mode .statistics-calculator,
body.dark-mode .bmi-calculator,
body.dark-mode .loan-calculator,
body.dark-mode .currency-converter,
body.dark-mode .unit-converter,
body.dark-mode .random-number-generator,
body.dark-mode .prime-number-checker,
body.dark-mode .factors-multiples-calculator,
body.dark-mode .quadratic-equation-calculator,
body.dark-mode .number-base-converter,
body.dark-mode .scientific-calculator,
body.dark-mode .matrix-calculator,
body.dark-mode .trigonometry-calculator,
body.dark-mode .logarithm-calculator {
    background: #374151;
    color: #f9fafb;
}

body.dark-mode .statistics-calculator::before,
body.dark-mode .bmi-calculator::before,
body.dark-mode .loan-calculator::before,
body.dark-mode .currency-converter::before,
body.dark-mode .unit-converter::before,
body.dark-mode .random-number-generator::before,
body.dark-mode .prime-number-checker::before,
body.dark-mode .factors-multiples-calculator::before,
body.dark-mode .quadratic-equation-calculator::before,
body.dark-mode .number-base-converter::before,
body.dark-mode .scientific-calculator::before,
body.dark-mode .matrix-calculator::before,
body.dark-mode .trigonometry-calculator::before,
body.dark-mode .logarithm-calculator::before {
    background: linear-gradient(90deg, #8b5cf6, #a855f7, #c084fc);
}

body.dark-mode .percentage-calculator input,
body.dark-mode .simple-calculator input,
body.dark-mode .age-calculator input,
body.dark-mode .average-calculator input,
body.dark-mode .fraction-calculator input {
    background: #4b5563;
    border-color: #6b7280;
    color: #f9fafb;
}

body.dark-mode input:focus {
    border-color: #8b5cf6;
}

body.dark-mode .tab-btn {
    background: #4b5563;
    color: #d1d5db;
}

body.dark-mode .tab-btn.active {
    background: #8b5cf6;
}

body.dark-mode .nav-btn {
    background: linear-gradient(135deg, #4b5563, #6b7280);
}

body.dark-mode .nav-btn:hover {
    background: linear-gradient(135deg, #374151, #4b5563);
}

body.dark-mode .back-btn {
    background: linear-gradient(135deg, #6b7280, #9ca3af);
}

body.dark-mode .back-btn:hover {
    background: linear-gradient(135deg, #4b5563, #6b7280);
}

body.dark-mode .calc-grid button {
    background: #4b5563;
    color: #f9fafb;
}

body.dark-mode .calc-grid button.btn-op {
    background: #6b7280;
}

body.dark-mode .calc-grid button.btn-clear {
    background: #dc2626;
}

body.dark-mode .calc-grid button.btn-equal {
    background: #8b5cf6;
}

body.dark-mode .calc-screen {
    background: #1f2937;
}

/* ===== Statistics Calculator ===== */
.statistics-calculator {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

.statistics-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #64748b, #475569, #334155);
}

body.dark-mode .statistics-calculator {
    background: #1f2937;
    color: #e5e7eb;
}

.stats-results {
    background: #f8fafc;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
}

body.dark-mode .stats-results {
    background: #374151;
}

/* ===== Statistics Calculator Elements ===== */
.statistics-calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #222;
    font-family: "Segoe UI", sans-serif;
}

.statistics-calculator p {
    text-align: center;
    font-weight: 600;
    margin-top: 10px;
    color: #111;
    font-family: "Segoe UI", sans-serif;
}

body.dark-mode .statistics-calculator h3 {
    color: #f9fafb;
}

.statistics-calculator input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 10px;
    border: 1px solid #ddd;
    font-size: 16px;
    outline: none;
    transition: border 0.3s;
}

body.dark-mode .statistics-calculator input {
    background: #4b5563;
    color: #f9fafb;
    border-color: #6b7280;
}

.statistics-calculator input:focus {
    border-color: #64748b;
}

body.dark-mode .statistics-calculator input:focus {
    border-color: #64748b;
}

.statistics-calculator button {
    padding: 12px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #64748b, #475569);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.statistics-calculator button:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #475569, #334155);
}

body.dark-mode .statistics-calculator button {
    background: linear-gradient(135deg, #4b5563, #6b7280);
}

body.dark-mode .statistics-calculator button:hover {
    background: linear-gradient(135deg, #374151, #4b5563);
}

/* ===== Ratio Calculator Elements ===== */
.ratio-calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #222;
    font-family: "Segoe UI", sans-serif;
}

.ratio-calculator p {
    text-align: center;
    font-weight: 600;
    margin-top: 10px;
    color: #111;
    font-family: "Segoe UI", sans-serif;
}

body.dark-mode .ratio-calculator h3 {
    color: #f9fafb;
}

.ratio-calculator button {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #65a30d, #4d7c0f);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    display: block;
    margin: 20px auto;
}

.ratio-calculator button:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #4d7c0f, #3f6212);
}

body.dark-mode .ratio-calculator button {
    background: linear-gradient(135deg, #4b5563, #6b7280);
}

body.dark-mode .ratio-calculator button:hover {
    background: linear-gradient(135deg, #374151, #4b5563);
}

/* ===== LCM & HCF Calculator Elements ===== */
.lcm-hcf-calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #222;
    font-family: "Segoe UI", sans-serif;
}

.lcm-hcf-calculator p {
    text-align: center;
    font-weight: 600;
    margin-top: 10px;
    color: #111;
    font-family: "Segoe UI", sans-serif;
}

body.dark-mode .lcm-hcf-calculator h3 {
    color: #f9fafb;
}

.lcm-hcf-calculator input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 10px;
    border: 1px solid #ddd;
    font-size: 16px;
    outline: none;
    transition: border 0.3s;
}

body.dark-mode .lcm-hcf-calculator input {
    background: #4b5563;
    color: #f9fafb;
    border-color: #6b7280;
}

.lcm-hcf-calculator input:focus {
    border-color: #f43f5e;
}

body.dark-mode .lcm-hcf-calculator input:focus {
    border-color: #f43f5e;
}

.lcm-hcf-calculator button {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #f43f5e, #e11d48);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    display: block;
    margin: 20px auto;
}

.lcm-hcf-calculator button:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #e11d48, #be123c);
}

body.dark-mode .lcm-hcf-calculator button {
    background: linear-gradient(135deg, #4b5563, #6b7280);
}

body.dark-mode .lcm-hcf-calculator button:hover {
    background: linear-gradient(135deg, #374151, #4b5563);
}

/* ===== Square Root Calculator Elements ===== */
.square-root-calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #222;
    font-family: "Segoe UI", sans-serif;
}

body.dark-mode .square-root-calculator h3 {
    color: #f9fafb;
}

.square-root-calculator button {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    display: block;
    margin: 10px auto;
    margin-top: -9%;
    margin-left: 53%;
    max-width: fit-content;
}

.square-root-calculator button:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #0284c7, #0369a1);
}

body.dark-mode .square-root-calculator button {
    background: linear-gradient(135deg, #4b5563, #6b7280);
}

body.dark-mode .square-root-calculator button:hover {
    background: linear-gradient(135deg, #374151, #4b5563);
}

.square-root-calculator p {
    text-align: center;
    font-weight: 600;
    margin-top: 10px;
    color: #111;
    font-family: "Segoe UI", sans-serif;
}

body.dark-mode .square-root-calculator p {
    color: #f9fafb;
}

/* ===== Ratio Calculator ===== */
.ratio-calculator {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

.ratio-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #65a30d, #4d7c0f, #3f6212);
}

body.dark-mode .ratio-calculator {
    background: #1f2937;
    color: #e5e7eb;
}

.ratio-input {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin: 20px 0;
}

.ratio-input input {
    width: 100px;
    padding: 10px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 16px;
    text-align: center;
}

body.dark-mode .ratio-input input {
    background: #374151;
    border-color: #4b5563;
    color: #e5e7eb;
}

.ratio-results {
    background: #f8fafc;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    text-align: center;
}

body.dark-mode .ratio-results {
    background: #374151;
}

/* ===== LCM & HCF Calculator ===== */
.lcm-hcf-calculator {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

.lcm-hcf-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #f43f5e, #e11d48, #be123c);
}

body.dark-mode .lcm-hcf-calculator {
    background: #1f2937;
    color: #e5e7eb;
}

.lcm-hcf-results {
    background: #f8fafc;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
}

body.dark-mode .lcm-hcf-results {
    background: #374151;
}

/* ===== Square Root Calculator ===== */
.square-root-calculator {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

.square-root-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #0ea5e9, #0284c7, #0369a1);
}

body.dark-mode .square-root-calculator {
    background: #1f2937;
    color: #e5e7eb;
}

.calc-section {
    margin-bottom: 30px;
    padding: 20px;
    background: #f8fafc;
    border-radius: 8px;
}

body.dark-mode .calc-section {
    background: #374151;
}

.calc-section h4 {
    margin-top: 0;
    color: #4f46e5;
}

body.dark-mode .calc-section h4 {
    color: #a78bfa;
}

.calc-section input {
    width: 200px;
    padding: 10px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 16px;
    margin: 10px 0;
}

body.dark-mode .calc-section input {
    background: #4b5563;
    border-color: #6b7280;
    color: #e5e7eb;
}

/* ===== New Calculator Styles ===== */

/* Power & Exponent Calculator */
.power-exponent-calculator {
    max-width: 500px;
    margin: 20px auto;
    padding: 25px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    font-family: "Segoe UI", sans-serif;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.power-exponent-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #f59e0b, #d97706, #b45309);
}

.power-exponent-calculator:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.power-exponent-calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #222;
}

.power-exponent-calculator .tab-buttons {
    display: flex;
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    background: #f3f4f6;
}

.power-exponent-calculator .tab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: #f3f4f6;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.3s ease;
}

.power-exponent-calculator .tab-btn.active {
    background: #f59e0b;
    color: white;
}

.power-exponent-calculator .tab-content {
    display: none;
}

.power-exponent-calculator .tab-content.active {
    display: block;
}

.power-exponent-calculator input {
    width: 94%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 10px;
    border: 1px solid #ddd;
    font-size: 16px;
    outline: none;
    transition: border 0.3s;
}

.power-exponent-calculator input:focus {
    border-color: #f59e0b;
}

.power-exponent-calculator button {
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin: 5px;
}

.power-exponent-calculator button:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #d97706, #b45309);
}

.power-exponent-calculator button:active {
    transform: scale(0.98) translateY(0px);
    box-shadow: 0 2px 3px rgba(0,0,0,0.1);
}

/* Percentage Difference Calculator */
.percentage-difference-calculator {
    max-width: 400px;
    margin: 20px auto;
    padding: 25px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    font-family: "Segoe UI", sans-serif;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.percentage-difference-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #10b981, #059669, #047857);
}

.percentage-difference-calculator:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.percentage-difference-calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #222;
}

.percentage-difference-calculator input {
    width: 80%;
    max-width: 300px;
    padding: 12px 16px;
    border: 2px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    transition: border-color 0.3s ease;
    background: white;
    box-sizing: border-box;
}

.percentage-difference-calculator input:focus {
    border-color: #10b981;
}

.percentage-difference-calculator button {
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 100%;
    max-width: fit-content;
    margin-left: 100px;
}

.percentage-difference-calculator button:hover {
    transform: scale(1.02) translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #059669, #047857);
}

.percentage-difference-calculator button:active {
    transform: scale(0.98) translateY(0px);
    box-shadow: 0 2px 3px rgba(0,0,0,0.1);
}

/* Speed Time Distance Calculator */
.speed-time-distance-calculator {
    max-width: 500px;
    margin: 20px auto;
    padding: 25px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    font-family: "Segoe UI", sans-serif;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.speed-time-distance-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #2563eb, #1d4ed8);
}

.speed-time-distance-calculator:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.speed-time-distance-calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #222;
}

.speed-time-distance-calculator .tab-buttons {
    display: flex;
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    background: #f3f4f6;
}

.speed-time-distance-calculator .tab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: #f3f4f6;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.3s ease;
}

.speed-time-distance-calculator .tab-btn.active {
    background: #3b82f6;
    color: white;
}

.speed-time-distance-calculator .tab-content {
    display: none;
}

.speed-time-distance-calculator .tab-content.active {
    display: block;
}

.speed-time-distance-calculator input {
    width: 80%;
    max-width: 300px;
    padding: 12px 16px;
    border: 2px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    transition: border-color 0.3s ease;
    background: white;
    box-sizing: border-box;
}

.speed-time-distance-calculator input:focus {
    border-color: #3b82f6;
}

.speed-time-distance-calculator button {
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 100%;
}

.speed-time-distance-calculator button:hover {
    transform: scale(1.02) translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.speed-time-distance-calculator button:active {
    transform: scale(0.98) translateY(0px);
    box-shadow: 0 2px 3px rgba(0,0,0,0.1);
}

/* Profit & Loss Calculator */
.profit-loss-calculator {
    max-width: 500px;
    margin: 20px auto;
    padding: 25px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    font-family: "Segoe UI", sans-serif;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.profit-loss-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #ef4444, #dc2626, #b91c1c);
}

.profit-loss-calculator:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.profit-loss-calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #222;
}

.profit-loss-calculator .tab-buttons {
    display: flex;
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    background: #f3f4f6;
}

.profit-loss-calculator .tab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: #f3f4f6;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.3s ease;
}

.profit-loss-calculator .tab-btn.active {
    background: #ef4444;
    color: white;
}

.profit-loss-calculator .tab-content {
    display: none;
}

.profit-loss-calculator .tab-content.active {
    display: block;
}

.profit-loss-calculator input {
    width: 94%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 10px;
    border: 1px solid #ddd;
    font-size: 16px;
    outline: none;
    transition: border 0.3s;
}

.profit-loss-calculator input:focus {
    border-color: #ef4444;
}

.profit-loss-calculator button {
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 100%;
}

.profit-loss-calculator button:hover {
    transform: scale(1.02) translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #dc2626, #b91c1c);
}

.profit-loss-calculator button:active {
    transform: scale(0.98) translateY(0px);
    box-shadow: 0 2px 3px rgba(0,0,0,0.1);
}

/* Simple Interest Calculator */
.simple-interest-calculator {
    max-width: 400px;
    margin: 20px auto;
    padding: 25px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    font-family: "Segoe UI", sans-serif;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.simple-interest-calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #8b5cf6, #7c3aed, #6d28d9);
}

.simple-interest-calculator:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.simple-interest-calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #222;
}

.simple-interest-calculator input {
    width: 94%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 10px;
    border: 1px solid #ddd;
    font-size: 16px;
    outline: none;
    transition: border 0.3s;
}

.simple-interest-calculator input:focus {
    border-color: #8b5cf6;
}

.simple-interest-calculator button {
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 100%;
}

.simple-interest-calculator button:hover {
    transform: scale(1.02) translateY(-2px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
    background: linear-gradient(135deg, #7c3aed, #6d28d9);
}

.simple-interest-calculator button:active {
    transform: scale(0.98) translateY(0px);
    box-shadow: 0 2px 3px rgba(0,0,0,0.1);
}

/* ===== Dark Mode for New Calculators ===== */

body.dark-mode .power-exponent-calculator,
body.dark-mode .percentage-difference-calculator,
body.dark-mode .speed-time-distance-calculator,
body.dark-mode .profit-loss-calculator,
body.dark-mode .simple-interest-calculator {
    background: #1f2937;
    color: #e5e7eb;
}

body.dark-mode .power-exponent-calculator h3,
body.dark-mode .percentage-difference-calculator h3,
body.dark-mode .speed-time-distance-calculator h3,
body.dark-mode .profit-loss-calculator h3,
body.dark-mode .simple-interest-calculator h3 {
    color: #e5e7eb;
}

body.dark-mode .power-exponent-calculator input,
body.dark-mode .percentage-difference-calculator input,
body.dark-mode .speed-time-distance-calculator input,
body.dark-mode .profit-loss-calculator input,
body.dark-mode .simple-interest-calculator input {
    background: #4b5563;
    border-color: #6b7280;
    color: #e5e7eb;
}

body.dark-mode .power-exponent-calculator .tab-buttons,
body.dark-mode .speed-time-distance-calculator .tab-buttons,
body.dark-mode .profit-loss-calculator .tab-buttons {
    background: #374151;
}

body.dark-mode .power-exponent-calculator .tab-btn,
body.dark-mode .speed-time-distance-calculator .tab-btn,
body.dark-mode .profit-loss-calculator .tab-btn {
    background: #374151;
    color: #9ca3af;
}

body.dark-mode .power-exponent-calculator .tab-btn.active,
body.dark-mode .speed-time-distance-calculator .tab-btn.active,
body.dark-mode .profit-loss-calculator .tab-btn.active {
    color: white;
}

/* ===== Random Number Generator Calculator ===== */
.random-number-generator {
    max-width: 600px;
    margin: 0 auto;
    padding: 30px;
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid #e2e8f0;
}

.random-number-generator h3 {
    color: #1e293b;
    text-align: center;
    margin-bottom: 10px;
    font-size: 28px;
    font-weight: 700;
}

.random-number-generator p {
    text-align: center;
    color: #64748b;
    margin-bottom: 30px;
    font-size: 16px;
}

.random-number-generator label {
    display: block;
    margin-bottom: 8px;
    color: #374151;
    font-weight: 600;
    font-size: 14px;
    text-align: center;
}

.random-number-generator input[type="number"] {
    width: 80%;
    max-width: 300px;
    padding: 12px 16px;
    border: 2px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    transition: border-color 0.3s ease;
    background: white;
}

.random-number-generator input[type="number"]:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.random-number-generator button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    max-width: fit-content;
    margin-left: 180px;
    margin-right: 180px;
}

.random-number-generator button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.random-number-generator .result {
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: #1e293b;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}

body.dark-mode .random-number-generator {
    background: linear-gradient(135deg, #1e293b, #334155);
    border-color: #475569;
}

body.dark-mode .random-number-generator h3 {
    color: #f1f5f9;
}

body.dark-mode .random-number-generator p {
    color: #94a3b8;
}

body.dark-mode .random-number-generator label {
    color: #cbd5e1;
}

body.dark-mode .random-number-generator input[type="number"] {
    background: #334155;
    border-color: #475569;
    color: #f1f5f9;
}

body.dark-mode .random-number-generator input[type="number"]:focus {
    border-color: #60a5fa;
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.1);
}

body.dark-mode .random-number-generator .result {
    background: #334155;
    border-color: #475569;
    color: #f1f5f9;
}

/* ===== Prime Number Checker Calculator ===== */
.prime-number-checker {
    max-width: 600px;
    margin: 0 auto;
    padding: 30px;
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid #fde68a;
}

.prime-number-checker h3 {
    color: #92400e;
    text-align: center;
    margin-bottom: 10px;
    font-size: 28px;
    font-weight: 700;
}

.prime-number-checker p {
    text-align: center;
    color: #a16207;
    margin-bottom: 30px;
    font-size: 16px;
}

.prime-number-checker label {
    display: block;
    margin-bottom: 8px;
    color: #78350f;
    font-weight: 600;
    font-size: 14px;
    text-align: center;
}

.prime-number-checker input[type="number"] {
    width: 80%;
    max-width: 300px;
    padding: 12px 16px;
    border: 2px solid #d97706;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    transition: border-color 0.3s ease;
    background: white;
    box-sizing: border-box;
}

.prime-number-checker input[type="number"]:focus {
    outline: none;
    border-color: #d97706;
    box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.1);
}

.prime-number-checker button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #d97706, #b45309);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    max-width: fit-content;
    margin-left: 240px;
    margin-right: 235px;
}

.prime-number-checker button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(217, 119, 6, 0.4);
}

.prime-number-checker .result {
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: #92400e;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border: 1px solid #fde68a;
}

body.dark-mode .prime-number-checker {
    background: linear-gradient(135deg, #451a03, #78350f);
    border-color: #92400e;
}

body.dark-mode .prime-number-checker h3 {
    color: #fed7aa;
}

body.dark-mode .prime-number-checker p {
    color: #fdba74;
}

body.dark-mode .prime-number-checker label {
    color: #fed7aa;
}

body.dark-mode .prime-number-checker input[type="number"] {
    background: #78350f;
    border-color: #92400e;
    color: #fed7aa;
}

body.dark-mode .prime-number-checker input[type="number"]:focus {
    border-color: #d97706;
    box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.1);
}

body.dark-mode .prime-number-checker .result {
    background: #78350f;
    border-color: #92400e;
    color: #fed7aa;
}

/* ===== Factors & Multiples Calculator ===== */
.factors-multiples-calculator {
    max-width: 445px;
    margin: 0 auto;
    padding: 30px;
    background: linear-gradient(135deg, #ecfdf5, #d1fae5);
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid #d1fae5;
}

.factors-multiples-calculator h3 {
    color: #065f46;
    text-align: center;
    margin-bottom: 10px;
    font-size: 28px;
    font-weight: 700;
}

.factors-multiples-calculator p {
    text-align: center;
    color: #047857;
    margin-bottom: 30px;
    font-size: 16px;
}

.factors-multiples-calculator .tab-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    background: #f0fdf4;
    border-radius: 10px;
    padding: 5px;
    border: 1px solid #bbf7d0;
}

.factors-multiples-calculator .tab-btn {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    color: #065f46;
    cursor: pointer;
    transition: all 0.3s ease;
}

.factors-multiples-calculator .tab-btn.active {
    background: white;
    color: #065f46;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.factors-multiples-calculator .tab-content {
    display: none;
}

.factors-multiples-calculator .tab-content.active {
    display: block;
}

.factors-multiples-calculator label {
    display: block;
    margin-bottom: 8px;
    color: #065f46;
    font-weight: 600;
    font-size: 14px;
    text-align: center;
}

.factors-multiples-calculator input[type="number"] {
    width: 80%;
    max-width: 300px;
    padding: 12px 16px;
    border: 2px solid #10b981;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    transition: border-color 0.3s ease;
    background: white;
    box-sizing: border-box;
}

.factors-multiples-calculator input[type="number"]:focus {
    outline: none;
    border-color: #059669;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.factors-multiples-calculator button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    max-width: fit-content;
    margin-left: 177px;
    margin-right: 177px;
}

.factors-multiples-calculator button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.factors-multiples-calculator .result {
    text-align: center;
    font-size: 16px;
    font-weight: 600;
    color: #065f46;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border: 1px solid #bbf7d0;
    word-wrap: break-word;
}

body.dark-mode .factors-multiples-calculator {
    background: linear-gradient(135deg, #064e3b, #065f46);
    border-color: #047857;
}

body.dark-mode .factors-multiples-calculator h3 {
    color: #a7f3d0;
}

body.dark-mode .factors-multiples-calculator p {
    color: #6ee7b7;
}

body.dark-mode .factors-multiples-calculator .tab-buttons {
    background: #065f46;
    border-color: #047857;
}

body.dark-mode .factors-multiples-calculator .tab-btn {
    color: #a7f3d0;
}

body.dark-mode .factors-multiples-calculator .tab-btn.active {
    background: #064e3b;
    color: #a7f3d0;
}

body.dark-mode .factors-multiples-calculator label {
    color: #a7f3d0;
}

body.dark-mode .factors-multiples-calculator input[type="number"] {
    background: #065f46;
    border-color: #047857;
    color: #a7f3d0;
}

body.dark-mode .factors-multiples-calculator input[type="number"]:focus {
    border-color: #10b981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

body.dark-mode .factors-multiples-calculator .result {
    background: #065f46;
    border-color: #047857;
    color: #a7f3d0;
}

/* ===== Quadratic Equation Calculator ===== */
.quadratic-equation-calculator {
    max-width: 600px;
    margin: 0 auto;
    padding: 30px;
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid #fde68a;
}

.quadratic-equation-calculator h3 {
    color: #92400e;
    text-align: center;
    margin-bottom: 10px;
    font-size: 28px;
    font-weight: 700;
}

.quadratic-equation-calculator p {
    text-align: center;
    color: #a16207;
    margin-bottom: 30px;
    font-size: 16px;
}

.quadratic-equation-calculator .equation-display {
    text-align: center;
    font-size: 24px;
    font-weight: 600;
    color: #92400e;
    margin-bottom: 30px;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border: 1px solid #fde68a;
}

.quadratic-equation-calculator label {
    display: block;
    margin-bottom: 8px;
    color: #78350f;
    font-weight: 600;
    font-size: 14px;
    text-align: center;
}

.quadratic-equation-calculator input[type="number"] {
    width: 80%;
    max-width: 300px;
    padding: 12px 16px;
    border: 2px solid #d97706;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    transition: border-color 0.3s ease;
    background: white;
    box-sizing: border-box;
}

.quadratic-equation-calculator input[type="number"]:focus {
    outline: none;
    border-color: #d97706;
    box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.1);
}

.quadratic-equation-calculator button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #d97706, #b45309);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    max-width: fit-content;
    margin-left: 228px;
    margin-right: 216px;
}

.quadratic-equation-calculator button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(217, 119, 6, 0.4);
}

.quadratic-equation-calculator .result {
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: #92400e;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border: 1px solid #fde68a;
}

body.dark-mode .quadratic-equation-calculator {
    background: linear-gradient(135deg, #451a03, #78350f);
    border-color: #92400e;
}

body.dark-mode .quadratic-equation-calculator h3 {
    color: #fed7aa;
}

body.dark-mode .quadratic-equation-calculator p {
    color: #fdba74;
}

body.dark-mode .quadratic-equation-calculator .equation-display {
    background: #78350f;
    border-color: #92400e;
    color: #fed7aa;
}

body.dark-mode .quadratic-equation-calculator label {
    color: #fed7aa;
}

body.dark-mode .quadratic-equation-calculator input[type="number"] {
    background: #78350f;
    border-color: #92400e;
    color: #fed7aa;
}

body.dark-mode .quadratic-equation-calculator input[type="number"]:focus {
    border-color: #d97706;
    box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.1);
}

body.dark-mode .quadratic-equation-calculator .result {
    background: #78350f;
    border-color: #92400e;
    color: #fed7aa;
}

/* ===== Number Base Converter Calculator ===== */
.number-base-converter {
    max-width: 600px;
    margin: 0 auto;
    padding: 30px;
    background: linear-gradient(135deg, #f3e8ff, #e9d5ff);
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid #e9d5ff;
}

.number-base-converter h3 {
    color: #6b21a8;
    text-align: center;
    margin-bottom: 10px;
    font-size: 28px;
    font-weight: 700;
}

.number-base-converter p {
    text-align: center;
    color: #7c3aed;
    margin-bottom: 30px;
    font-size: 16px;
}

.number-base-converter label {
    display: block;
    margin-bottom: 8px;
    color: #581c87;
    font-weight: 600;
    font-size: 14px;
    text-align: center;
}

.number-base-converter input[type="text"],
.number-base-converter input[type="number"] {
    width: 80%;
    max-width: 300px;
    padding: 12px 16px;
    border: 2px solid #a855f7;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    transition: border-color 0.3s ease;
    background: white;
    box-sizing: border-box;
}

.number-base-converter input[type="text"]:focus,
.number-base-converter input[type="number"]:focus {
    outline: none;
    border-color: #9333ea;
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.1);
}

.number-base-converter select {
    width: 84%;
    max-width: 320px;
    padding: 12px 16px;
    border: 2px solid #a855f7;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    transition: border-color 0.3s ease;
    background: white;
    box-sizing: border-box;
}

.number-base-converter select[options]:focus {
    outline: none;
    border-color: #9333ea;
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.1);
}

.number-base-converter button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #a855f7, #9333ea);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    max-width: fit-content;
    margin-left: 255px;
    margin-right: 255px;
}

.number-base-converter button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.4);
}

.number-base-converter .result {
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: #6b21a8;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border: 1px solid #e9d5ff;
}

body.dark-mode .number-base-converter {
    background: linear-gradient(135deg, #3b0764, #581c87);
    border-color: #7c3aed;
}

body.dark-mode .number-base-converter h3 {
    color: #e9d5ff;
}

body.dark-mode .number-base-converter p {
    color: #d8b4fe;
}

body.dark-mode .number-base-converter label {
    color: #e9d5ff;
}

body.dark-mode .number-base-converter input[type="text"],
body.dark-mode .number-base-converter input[type="number"] {
    background: #581c87;
    border-color: #7c3aed;
    color: #e9d5ff;
}

body.dark-mode .number-base-converter input[type="text"]:focus,
body.dark-mode .number-base-converter input[type="number"]:focus {
    border-color: #a855f7;
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.1);
}

body.dark-mode .number-base-converter .result {
    background: #581c87;
    border-color: #7c3aed;
    color: #e9d5ff;
}

/* ===== Home Page Styles ===== */
.container {
    max-width: 1200px;
    margin: 50px auto;
    background: #ffffff;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.container h1 {
    color: #4f46e5;
    margin-bottom: 10px;
    text-align: center;
    font-size: 36px;
    font-weight: 700;
}

.subtitle {
    color: #666;
    margin-bottom: 40px;
    font-size: 18px;
    text-align: center;
}

.calculators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.calculator-card {
    background: #f8fafc;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    text-align: center;
}

.calculator-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
    border-color: #4f46e5;
}

.calculator-icon {
    font-size: 48px;
    margin-bottom: 15px;
    display: block;
}

.calculator-card h3 {
    color: #1f2937;
    margin-bottom: 10px;
    font-size: 20px;
    font-weight: 600;
}

.calculator-card p {
    color: #6b7280;
    margin-bottom: 15px;
    font-size: 14px;
    line-height: 1.5;
}

.calculator-card a {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(135deg, #4f46e5, #6366f1);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.calculator-card a:hover {
    background: linear-gradient(135deg, #4338ca, #4f46e5);
    transform: scale(1.05);
}

body.dark-mode .container {
    background: #1e293b;
    color: #f1f5f9;
}

body.dark-mode .container h1 {
    color: #a5b4fc;
}

body.dark-mode .subtitle {
    color: #94a3b8;
}

body.dark-mode .calculator-card {
    background: #334155;
    border-color: #475569;
}

body.dark-mode .calculator-card:hover {
    border-color: #6366f1;
}

body.dark-mode .calculator-card h3 {
    color: #f1f5f9;
}

body.dark-mode .calculator-card p {
    color: #cbd5e1;
}