/* CSS Variables for Theme Management */
:root {
    /* Light Theme Colors */
    --primary-color: #05386B;
    --secondary-color: #379683;
    --accent-color: #5CDB95;
    --light-accent: #8EE4AF;
    --background-color: #EDF5E1;
    --text-color: #05386B;
    --text-color-secondary: #2c5f41;
    --text-color-muted: #4a6b5a;
    --card-background: #ffffff;
    --border-color: #8EE4AF;
    --shadow: 0 4px 6px rgba(5, 56, 107, 0.1);
    --shadow-hover: 0 8px 15px rgba(5, 56, 107, 0.2);
    --border-radius: 12px;
    --transition: all 0.3s ease;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
}

[data-theme="dark"] {
    /* Dark Theme Colors */
    --primary-color: #EDF5E1;
    --secondary-color: #8EE4AF;
    --accent-color: #5CDB95;
    --light-accent: #379683;
    --background-color: #05386B;
    --text-color: #EDF5E1;
    --text-color-secondary: #B8E6D1;
    --text-color-muted: #8EE4AF;
    --card-background: #0a4a7a;
    --border-color: #379683;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 15px rgba(0, 0, 0, 0.4);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    transition: var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header and Navigation */
.header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(142, 228, 175, 0.2);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition);
}

[data-theme="dark"] .header {
    background: rgba(5, 56, 107, 0.8);
    border-bottom: 1px solid rgba(55, 150, 131, 0.2);
}

.nav__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav__link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    white-space: nowrap;
}

.nav__link:hover {
    color: var(--accent-color);
    background: rgba(92, 219, 149, 0.1);
}

.nav__logo {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.logo-img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    display: inline-block;
}

.nav__theme-toggle {
    background: var(--accent-color);
    border: none;
    padding: 0.75rem;
    border-radius: 12px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(92, 219, 149, 0.2);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav__theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(92, 219, 149, 0.3);
}

/* Main Content */
.main {
    min-height: calc(100vh - 120px);
    padding: 2rem 0;
}

/* Hero Section - Modern Minimalist */
.hero {
    text-align: center;
    margin-bottom: 4rem;
    padding: 4rem 0 3rem;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
    border-radius: 2px;
}

.hero__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: 1rem;
    color: var(--primary-color);
    line-height: var(--line-height-tight);
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
    color: var(--text-color-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: var(--line-height-relaxed);
}

.hero__actions {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
}

.learn-more-btn {
    display: inline-block;
    padding: 0.75rem 1.25rem;
    border-radius: 12px;
    background: var(--accent-color);
    color: var(--primary-color);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(92, 219, 149, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.learn-more-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(92, 219, 149, 0.4);
}

/* Calculator Section - Modern Minimalist */
.calculator {
    background: var(--card-background);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 8px 32px rgba(5, 56, 107, 0.08);
    margin-bottom: 4rem;
    border: 1px solid rgba(142, 228, 175, 0.1);
    position: relative;
    overflow: hidden;
}

[data-theme="dark"] .calculator {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(55, 150, 131, 0.1);
}

.calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
}

.calculator__modes {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    background: rgba(142, 228, 175, 0.1);
    padding: 0.5rem;
    border-radius: 16px;
    border: 1px solid rgba(142, 228, 175, 0.2);
}

.calculator__mode {
    flex: 1;
    min-width: 200px;
    padding: 1rem 1.5rem;
    border: none;
    background: transparent;
    color: var(--text-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    position: relative;
}

.calculator__mode:hover {
    background: rgba(92, 219, 149, 0.1);
    transform: translateY(-1px);
}

.calculator__mode--active {
    background: var(--accent-color);
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(92, 219, 149, 0.3);
    transform: translateY(-1px);
}

.calculator__panel {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    padding: 2rem;
    margin-top: 1rem;
    border: 1px solid rgba(142, 228, 175, 0.1);
}

[data-theme="dark"] .calculator__panel {
    background: rgba(10, 74, 122, 0.3);
    border: 1px solid rgba(55, 150, 131, 0.1);
}

.calculator__panel--active {
    display: block;
    opacity: 1;
    transform: translateY(0);
    animation: slideInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.panel__title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    text-align: center;
    line-height: var(--line-height-tight);
}

/* Input Groups */
.input-group {
    margin-bottom: 1.5rem;
}

.input-group__label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    color: var(--text-color);
    line-height: var(--line-height-normal);
}

.input-group__input,
.input-group__select {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid rgba(142, 228, 175, 0.3);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.8);
    color: var(--text-color);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    line-height: var(--line-height-normal);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

[data-theme="dark"] .input-group__input,
[data-theme="dark"] .input-group__select {
    background: rgba(10, 74, 122, 0.5);
    border: 2px solid rgba(55, 150, 131, 0.3);
}

.input-group__input:focus,
.input-group__select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(92, 219, 149, 0.15);
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .input-group__input:focus,
[data-theme="dark"] .input-group__select:focus {
    background: rgba(10, 74, 122, 0.7);
}

.input-group__input:hover,
.input-group__select:hover {
    border-color: var(--light-accent);
}

/* Input validation states */
.input-group__input.valid,
.input-group__select.valid {
    border-color: #10B981;
    background-color: rgba(16, 185, 129, 0.05);
}

.input-group__input.invalid,
.input-group__select.invalid {
    border-color: #EF4444;
    background-color: rgba(239, 68, 68, 0.05);
    animation: shake 0.5s ease-in-out;
}

/* Shake animation for invalid inputs */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Loading state for inputs */
.input-group__input.loading {
    background-image: linear-gradient(90deg, transparent, rgba(92, 219, 149, 0.2), transparent);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Function Buttons */
.function-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.function-btn {
    padding: 1.25rem 1.5rem;
    border: 2px solid rgba(55, 150, 131, 0.3);
    background: rgba(255, 255, 255, 0.8);
    color: var(--text-color);
    border-radius: 16px;
    cursor: pointer;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    line-height: var(--line-height-normal);
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

[data-theme="dark"] .function-btn {
    background: rgba(10, 74, 122, 0.5);
    border: 2px solid rgba(55, 150, 131, 0.3);
}

.function-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.function-btn:hover::before {
    left: 100%;
}

.function-btn:hover {
    background: var(--accent-color);
    color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(92, 219, 149, 0.3);
    border-color: var(--accent-color);
}

.function-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow);
}

.function-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.function-btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Loading state for buttons */
.function-btn.loading {
    pointer-events: none;
    position: relative;
}

.function-btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid var(--text-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Additional UX animations */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Focus states for better accessibility */
.input-group.focused .input-group__label {
    color: var(--accent-color);
    transform: translateY(-2px);
    transition: all 0.3s ease;
}

/* Enhanced hover effects */
.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Success and error states */
.success {
    border-color: #10B981 !important;
    background-color: rgba(16, 185, 129, 0.1) !important;
}

.error {
    border-color: #EF4444 !important;
    background-color: rgba(239, 68, 68, 0.1) !important;
}

/* Loading overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    border-radius: var(--border-radius);
}

.loading-overlay .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Triangle Inputs */
.triangle-type {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 500;
}

.radio-label input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-color);
}

.triangle-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

/* Calculate Button */
.calculate-btn {
    width: 100%;
    padding: 1.25rem 2rem;
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    color: var(--primary-color);
    border: none;
    border-radius: 16px;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    line-height: var(--line-height-normal);
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(92, 219, 149, 0.3);
    position: relative;
    overflow: hidden;
}

.calculate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(92, 219, 149, 0.4);
}

/* Converter Grid */
.converter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.dms-inputs {
    display: flex;
    gap: 0.5rem;
    background: rgba(142, 228, 175, 0.08);
    padding: 0.5rem;
    border-radius: 16px;
    border: 1px solid rgba(142, 228, 175, 0.2);
}

.dms-input {
    flex: 1;
    padding: 1rem 1.25rem;
    border: 2px solid rgba(142, 228, 175, 0.3);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.8);
    color: var(--text-color);
    text-align: center;
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.dms-input::placeholder {
    color: var(--text-color-muted);
}

.dms-input:hover {
    border-color: var(--light-accent);
}

.dms-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(92, 219, 149, 0.15);
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .dms-inputs {
    background: rgba(10, 74, 122, 0.25);
    border: 1px solid rgba(55, 150, 131, 0.2);
}

[data-theme="dark"] .dms-input {
    background: rgba(10, 74, 122, 0.5);
    border: 2px solid rgba(55, 150, 131, 0.3);
}

[data-theme="dark"] .dms-input:focus {
    background: rgba(10, 74, 122, 0.7);
}

/* Angle Operations */
.angle-operations {
    border-top: 2px solid var(--border-color);
    padding-top: 2rem;
}

.angle-operations h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    text-align: center;
}

.operation-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.operation-btn {
    flex: 1;
    min-width: 200px;
    padding: 0.75rem;
    background: var(--light-accent);
    color: var(--primary-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.operation-btn:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
}

/* Result Panel */
.result-panel {
    background: var(--background-color);
    border: 2px solid var(--accent-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 1rem;
    min-height: 100px;
    display: none;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.result-panel.show {
    display: block;
    opacity: 1;
    transform: translateY(0) scale(1);
    animation: resultSlideIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes resultSlideIn {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    50% {
        opacity: 0.8;
        transform: translateY(-5px) scale(1.02);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-panel h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.result-panel .formula {
    background: var(--card-background);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    font-family: 'Courier New', monospace;
    border-left: 4px solid var(--accent-color);
}

.result-panel .result-value {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--secondary-color);
    line-height: var(--line-height-tight);
}

/* Triangle Visual */
.triangle-visual {
    background: var(--background-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-top: 2rem;
    text-align: center;
    min-height: 250px;
    display: none;
    overflow: hidden;
}

.triangle-visual.show {
    display: block;
}

.triangle-visual svg {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.triangle-container {
    width: 100%;
    overflow: hidden;
    border-radius: 8px;
    background: var(--background-color);
    padding: 1rem;
    box-shadow: var(--shadow);
}

.triangle-info {
    background: var(--card-background);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border-left: 4px solid var(--accent-color);
}

.triangle-info p {
    margin: 0.25rem 0;
    font-size: 0.9rem;
    color: var(--text-color);
}

.triangle-info strong {
    color: var(--secondary-color);
}

/* FAQ Section - Modern Minimalist */
.faq {
    margin-bottom: 4rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 24px;
    padding: 3rem;
    border: 1px solid rgba(142, 228, 175, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

[data-theme="dark"] .faq {
    background: rgba(10, 74, 122, 0.3);
    border: 1px solid rgba(55, 150, 131, 0.1);
}

.faq__title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
    line-height: var(--line-height-tight);
}

.faq__container {
    max-width: 800px;
    margin: 0 auto;
}

.faq__item {
    background: var(--card-background);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq__question {
    width: 100%;
    padding: 1.5rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--text-color);
    transition: var(--transition);
    line-height: var(--line-height-normal);
}

.faq__question:hover {
    background: var(--background-color);
}

.faq__icon {
    font-size: 1.5rem;
    transition: var(--transition);
}

.faq__item.active .faq__icon {
    transform: rotate(45deg);
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq__item.active .faq__answer {
    max-height: 200px;
}

.faq__answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-color-secondary);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-base);
}

/* Footer - Modern Minimalist */
.footer {
    background: rgba(5, 56, 107, 0.9);
    color: var(--background-color);
    text-align: center;
    padding: 3rem 0;
    margin-top: auto;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(142, 228, 175, 0.2);
}

[data-theme="dark"] .footer {
    background: rgba(5, 56, 107, 0.95);
    border-top: 1px solid rgba(55, 150, 131, 0.2);
}

.footer__text {
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero__title {
        font-size: var(--font-size-3xl);
    }
    
    .hero__subtitle {
        font-size: var(--font-size-lg);
    }
    
    .calculator {
        padding: 1rem;
    }
    
    .calculator__modes {
        flex-direction: column;
    }
    
    .calculator__mode {
        min-width: auto;
    }
    
    .function-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .converter-grid {
        grid-template-columns: 1fr;
    }
    
    .operation-buttons {
        flex-direction: column;
    }
    
    .triangle-type {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }
    
    .nav__logo {
        font-size: var(--font-size-xl);
    }
    
    /* Triangle visual responsive */
    .triangle-visual {
        padding: 0.5rem;
        min-height: 200px;
    }
    
    .triangle-container {
        padding: 0.5rem;
    }
    
    .triangle-info {
        padding: 0.75rem;
    }
    
    .triangle-info p {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .hero__title {
        font-size: var(--font-size-2xl);
    }
    
    .function-buttons {
        grid-template-columns: 1fr;
    }
    
    .dms-inputs {
        flex-direction: column;
    }
    
    .nav__container {
        padding: 1rem 10px;
    }
    
    /* Triangle visual for small screens */
    .triangle-visual {
        padding: 0.25rem;
        min-height: 180px;
    }
    
    .triangle-container {
        padding: 0.25rem;
    }
    
    .triangle-info {
        padding: 0.5rem;
    }
    
    .triangle-info p {
        font-size: 0.75rem;
    }
}

@media (max-width: 320px) {
    /* Extra small screens */
    .triangle-visual {
        min-height: 150px;
    }
    
    .triangle-info p {
        font-size: var(--font-size-xs);
    }
}

/* Enhanced Text Readability */
.text-highlight {
    color: var(--secondary-color);
    font-weight: var(--font-weight-semibold);
}

.text-muted {
    color: var(--text-color-muted);
    font-size: var(--font-size-sm);
}

.text-small {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
}

.text-large {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
}

/* Improved contrast for better accessibility */
[data-theme="light"] {
    --text-contrast-high: #05386B;
    --text-contrast-medium: #2c5f41;
    --text-contrast-low: #4a6b5a;
}

[data-theme="dark"] {
    --text-contrast-high: #EDF5E1;
    --text-contrast-medium: #B8E6D1;
    --text-contrast-low: #8EE4AF;
}

/* Focus states for better accessibility */
*:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Improved button text contrast */
.function-btn:focus,
.calculate-btn:focus,
.calculator__mode:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(92, 219, 149, 0.2);
}

/* Modern Design Enhancements */
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.gradient-border {
    position: relative;
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    padding: 2px;
    border-radius: 16px;
}

.gradient-border::before {
    content: '';
    position: absolute;
    inset: 2px;
    background: var(--card-background);
    border-radius: 14px;
    z-index: -1;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(142, 228, 175, 0.1);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Privacy Policy, Terms of Use, and FAQ Pages */
.privacy-policy,
.terms-of-use,
.faq {
    background: rgba(255, 255, 255, 0.5);
    border-radius: 24px;
    padding: 3rem;
    border: 1px solid rgba(142, 228, 175, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    margin-bottom: 4rem;
}

[data-theme="dark"] .privacy-policy,
[data-theme="dark"] .terms-of-use,
[data-theme="dark"] .faq {
    background: rgba(5, 56, 107, 0.3);
    border: 1px solid rgba(55, 150, 131, 0.2);
}

.privacy-policy__header,
.terms-of-use__header,
.faq__header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid rgba(142, 228, 175, 0.2);
}

/* Back to Home link */
.page-actions {
    display: flex;
    justify-content: center;
    margin: 0 0 1.5rem 0;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.9rem;
    border-radius: 10px;
    border: 1px solid rgba(142, 228, 175, 0.3);
    background: rgba(255, 255, 255, 0.6);
    color: var(--text-color);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all 0.2s ease;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.back-link:hover {
    transform: translateY(-1px);
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.85);
}

[data-theme="dark"] .back-link {
    background: rgba(10, 74, 122, 0.5);
    color: var(--text-color);
    border-color: rgba(55, 150, 131, 0.3);
}

[data-theme="dark"] .back-link:hover {
    background: rgba(10, 74, 122, 0.7);
}

.privacy-policy__title,
.terms-of-use__title,
.faq__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: 1rem;
    line-height: var(--line-height-tight);
}

.privacy-policy__subtitle,
.terms-of-use__subtitle,
.faq__subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-color-secondary);
    font-weight: var(--font-weight-medium);
}

.privacy-section,
.terms-section {
    margin-bottom: 2.5rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    border: 1px solid rgba(142, 228, 175, 0.1);
}

[data-theme="dark"] .privacy-section,
[data-theme="dark"] .terms-section {
    background: rgba(10, 74, 122, 0.2);
    border: 1px solid rgba(55, 150, 131, 0.1);
}

.privacy-section__title,
.terms-section__title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
    margin-bottom: 1rem;
    line-height: var(--line-height-tight);
}

.privacy-subsection__title,
.terms-subsection__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--accent-color);
    margin: 1.5rem 0 1rem 0;
    line-height: var(--line-height-tight);
}

.privacy-section__text,
.terms-section__text {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--text-color-secondary);
    margin-bottom: 1rem;
}

.privacy-list,
.terms-list {
    margin: 1rem 0;
    padding-left: 2rem;
}

.privacy-list li,
.terms-list li {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--text-color-secondary);
    margin-bottom: 0.5rem;
}

.contact-info {
    background: rgba(92, 219, 149, 0.1);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid rgba(92, 219, 149, 0.2);
    margin-top: 1rem;
}

.contact-info p {
    margin: 0.5rem 0;
    font-size: var(--font-size-base);
    color: var(--text-color);
}

/* FAQ Specific Styles */
.faq__category {
    margin-bottom: 3rem;
}

.faq__category-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid rgba(142, 228, 175, 0.2);
}

.faq__item {
    margin-bottom: 1rem;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    border: 1px solid rgba(142, 228, 175, 0.1);
    overflow: hidden;
}

[data-theme="dark"] .faq__item {
    background: rgba(10, 74, 122, 0.2);
    border: 1px solid rgba(55, 150, 131, 0.1);
}

.faq__question {
    width: 100%;
    padding: 1.5rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq__question:hover {
    background: rgba(92, 219, 149, 0.1);
}

.faq__question-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--text-color);
    line-height: var(--line-height-normal);
}

.faq__icon {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--accent-color);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq__question[aria-expanded="true"] .faq__icon {
    transform: rotate(45deg);
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq__answer[aria-hidden="false"] {
    max-height: 500px;
}

.faq__answer-text {
    padding: 0 1.5rem 1.5rem 1.5rem;
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--text-color-secondary);
    margin: 0;
}

.faq__list {
    margin: 1rem 0;
    padding-left: 2rem;
}

.faq__list li {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--text-color-secondary);
    margin-bottom: 0.5rem;
}

/* Footer Enhanced Styles */
.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 0.75rem;
    padding: 1rem 0;
}

.footer__main {
    flex: 1;
    max-width: 400px;
}

.footer__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: #ffffff;
    margin: 0;
    line-height: var(--line-height-tight);
}

.footer-logo-img {
    width: 20px;
    height: 20px;
    object-fit: contain;
    vertical-align: middle;
    margin-right: 0.4rem;
}

.footer__description {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

.footer__links-section {
    flex-shrink: 0;
}

.footer__links {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
}

.footer__link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all 0.2s ease;
    padding: 0.125rem 0;
}

.footer__link:hover {
    color: #5cdb95;
    transform: translateY(-1px);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 0.75rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.footer__copyright {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.85);
    margin: 0;
    font-weight: var(--font-weight-medium);
}

.footer__credits {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.75);
    margin: 0;
}

.footer__credit-link {
    color: #5cdb95;
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    transition: color 0.2s ease;
}

.footer__credit-link:hover {
    color: var(--light-accent);
}

/* Responsive Design for New Pages */
@media (max-width: 768px) {
    .nav__container {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .nav__actions {
        justify-content: center;
        gap: 1rem;
    }
    
    .nav__link {
        padding: 0.4rem 0.8rem;
        font-size: var(--font-size-sm);
    }
    
    .privacy-policy,
    .terms-of-use,
    .faq {
        padding: 2rem 1.5rem;
    }
    
    .privacy-policy__title,
    .terms-of-use__title,
    .faq__title {
        font-size: var(--font-size-3xl);
    }
    
    .privacy-section,
    .terms-section {
        padding: 1.5rem;
    }
    
    .footer__content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .footer__main {
        max-width: none;
    }
    
    .footer__links {
        align-items: center;
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: 0.75rem;
    }
}

@media (max-width: 480px) {
    .nav__link {
        padding: 0.3rem 0.6rem;
        font-size: var(--font-size-xs);
    }
    
    .footer__content {
        padding: 1rem 0;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles for Better Accessibility */
button:focus,
input:focus,
select:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
        --shadow-hover: 0 8px 15px rgba(0, 0, 0, 0.7);
    }
    
    .calculator__mode,
    .function-btn,
    .operation-btn {
        border-width: 3px;
    }
}

/* Print Styles */
@media print {
    .nav__theme-toggle,
    .calculator__modes,
    .function-buttons,
    .operation-buttons,
    .calculate-btn {
        display: none;
    }
    
    .result-panel {
        display: block !important;
        border: 2px solid #000;
    }
    
    body {
        background: white;
        color: black;
    }
}