/* ============================================
   A1C Calculator Pro - Main Stylesheet
   Premium SaaS Healthcare Design
   ============================================ */

/* CSS Variables - Theme System */
:root {
    /* Colors - Medical Palette */
    --color-primary: #0066cc;
    --color-primary-dark: #0052a3;
    --color-primary-light: #e6f2ff;
    --color-secondary: #00a89c;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-orange: #f97316;
    --color-danger: #ef4444;
    
    
    /* Neutrals */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Semantic Colors - Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --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: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* Borders & Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --color-primary-light: #1e3a5f;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
}

/* ============================================
   Base Reset & Typography
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-base), color var(--transition-base);
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

p { margin-bottom: var(--space-4); }

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover { color: var(--color-primary-dark); }

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ============================================
   Accessibility
   ============================================ */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--space-2) var(--space-4);
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   Layout
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (min-width: 768px) {
    .container { padding: 0 var(--space-6); }
}

.main-content {
    min-height: calc(100vh - 200px);
}

/* ============================================
   Header
   ============================================ */
.site-header {
    position: sticky;
    top: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .site-header {
    background: rgba(15, 23, 42, 0.95);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: var(--space-4);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-primary);
    font-weight: 700;
    font-size: var(--font-size-lg);
    text-decoration: none;
}

.logo-icon {
    color: var(--color-primary);
}

.logo-pro {
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    background: var(--color-primary-light);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    margin-left: 4px;
}

/* Desktop Navigation */
.main-nav {
    display: none;
}

@media (min-width: 1024px) {
    .main-nav { display: block; }
    .mobile-menu-toggle { display: none; }
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-6);
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: var(--space-2) 0;
    transition: color var(--transition-fast);
}

.nav-link:hover { color: var(--color-primary); }

/* Dropdown */
.nav-dropdown { position: relative; }

.dropdown-arrow {
    font-size: var(--font-size-xs);
    margin-left: 2px;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    padding: var(--space-2);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
}

.dropdown-menu a:hover {
    background: var(--bg-secondary);
    color: var(--color-primary);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    min-width: 40px;
    min-height: 40px;
}

.icon-btn:hover {
    background: var(--bg-secondary);
    color: var(--color-primary);
}

/* Search Overlay */
.search-overlay {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-4) 0;
    box-shadow: var(--shadow-md);
}

.search-overlay[hidden] { display: none; }

.search-form {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}

.search-input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.search-submit {
    padding: var(--space-3) var(--space-5);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
}

.search-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--space-2);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    padding: var(--space-4);
    overflow-y: auto;
    z-index: 999;
}

.mobile-menu[hidden] { display: none; }

.mobile-nav-list {
    list-style: none;
}

.mobile-nav-list a {
    display: block;
    padding: var(--space-4);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 500;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--bg-primary) 100%);
    padding: var(--space-12) 0 var(--space-16);
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--bg-primary) 100%);
}

.hero-content {
    text-align: center;
    margin-bottom: var(--space-8);
}

.hero-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

@media (min-width: 768px) {
    .hero-title { font-size: 3rem; }
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Calculator Card
   ============================================ */
.calculator-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* Calculator Tabs */
.calc-tabs {
    display: flex;
    overflow-x: auto;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    scrollbar-width: none;
}

.calc-tabs::-webkit-scrollbar { display: none; }

.calc-tab {
    flex: 1;
    min-width: max-content;
    padding: var(--space-4) var(--space-4);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-size-sm);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.calc-tab:hover {
    color: var(--color-primary);
    background: var(--bg-primary);
}

.calc-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    background: var(--bg-primary);
}

/* Calculator Body */
.calc-body {
    padding: var(--space-6);
}

.calc-mode { display: none; }
.calc-mode.active { display: block; }

.input-group {
    margin-bottom: var(--space-5);
}

.input-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.input-unit {
    color: var(--text-muted);
    font-weight: 400;
    font-size: var(--font-size-sm);
}

.calc-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.calc-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.calc-input:invalid {
    border-color: var(--color-danger);
}

.input-help {
    display: block;
    margin-top: var(--space-1);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px;
    text-decoration: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    width: 100%;
    margin-bottom: var(--space-2);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    width: 100%;
}

.btn-ghost:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    flex: 1;
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
}

/* ============================================
   Results Panel
   ============================================ */
.calc-results {
    padding: var(--space-6);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.calc-results[hidden] { display: none; }

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
}

.result-title {
    font-size: var(--font-size-xl);
    margin: 0;
}

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

.result-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

@media (min-width: 480px) {
    .result-grid { grid-template-columns: repeat(4, 1fr); }
}

.result-item {
    background: var(--bg-primary);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border-color);
}

.result-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-1);
}

.result-value {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-1);
}

.result-unit {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* Health Status */
.health-status {
    background: var(--bg-primary);
    padding: var(--space-5);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-5);
    text-align: center;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-3);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
}

.status-badge.status-normal {
    background: #d1fae5;
    color: #065f46;
}

.status-badge.status-prediabetes {
    background: #fef3c7;
    color: #92400e;
}

.status-badge.status-diabetes {
    background: #fed7aa;
    color: #9a3412;
}

.status-badge.status-poor {
    background: #fee2e2;
    color: #991b1b;
}

[data-theme="dark"] .status-badge.status-normal {
    background: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
}

[data-theme="dark"] .status-badge.status-prediabetes {
    background: rgba(245, 158, 11, 0.2);
    color: #fcd34d;
}

[data-theme="dark"] .status-badge.status-diabetes {
    background: rgba(249, 115, 22, 0.2);
    color: #fdba74;
}

[data-theme="dark"] .status-badge.status-poor {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.status-description {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Health Score Gauge */
.health-score {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-5);
}

.gauge {
    width: 200px;
    height: 120px;
}

.gauge-value {
    fill: var(--text-primary);
}

.gauge-label {
    fill: var(--text-muted);
}

/* Result Actions */
.result-actions {
    display: flex;
    gap: var(--space-2);
}

/* ============================================
   Content Sections
   ============================================ */
.content-section {
    padding: var(--space-16) 0;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-10);
    font-size: var(--font-size-3xl);
}

.content-grid {
    display: grid;
    gap: var(--space-6);
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .content-grid { grid-template-columns: repeat(2, 1fr); }
}

.content-card {
    background: var(--bg-primary);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.content-card h3 {
    margin-bottom: var(--space-3);
    color: var(--color-primary);
}

/* Reference Table */
.table-wrapper {
    overflow-x: auto;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.reference-table {
    width: 100%;
    border-collapse: collapse;
}

.reference-table th,
.reference-table td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.reference-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.reference-table tbody tr:last-child td {
    border-bottom: none;
}

.reference-table tbody tr:hover {
    background: var(--bg-secondary);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-orange {
    background: #fed7aa;
    color: #9a3412;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

[data-theme="dark"] .badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
}

[data-theme="dark"] .badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: #fcd34d;
}

[data-theme="dark"] .badge-orange {
    background: rgba(249, 115, 22, 0.2);
    color: #fdba74;
}

[data-theme="dark"] .badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

/* FAQ Section */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.faq-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    padding: var(--space-4) var(--space-5);
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::-webkit-details-marker { display: none; }

.faq-question::after {
    content: '+';
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--space-5) var(--space-5);
    color: var(--text-secondary);
}

/* Disclaimer */
.disclaimer-section {
    padding: var(--space-8) 0;
    background: var(--bg-secondary);
}

.disclaimer-box {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-5);
    background: var(--bg-primary);
    border: 1px solid var(--color-warning);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.disclaimer-box svg {
    color: var(--color-warning);
    flex-shrink: 0;
}

.disclaimer-box p {
    margin: var(--space-1) 0 0;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-12) 0 var(--space-6);
}

.footer-top {
    display: grid;
    gap: var(--space-8);
    grid-template-columns: 1fr;
    margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
    .footer-top { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

.footer-title {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.footer-text {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-4);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
}

.social-links {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.footer-disclaimer {
    padding: var(--space-5);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.toast {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-5);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-width: 280px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-success { border-left: 4px solid var(--color-success); }
.toast-error { border-left: 4px solid var(--color-danger); }
.toast-warning { border-left: 4px solid var(--color-warning); }

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .site-header,
    .site-footer,
    .result-actions,
    .search-overlay,
    .mobile-menu {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .calculator-card {
        box-shadow: none;
        border: 1px solid #000;
    }
}




/* ============================================
   Mobile Sidebar (Slides from RIGHT)
   ============================================ */
.mobile-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-sidebar.open {
    visibility: visible;
    opacity: 1;
}

/* Dark background overlay */
.mobile-sidebar-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

/* The actual white menu box (Right Side) */
.mobile-sidebar-content {
    position: absolute;
    top: 0;
    right: 0; /* SLIDES FROM RIGHT */
    width: 280px;
    max-width: 80%;
    height: 100%;
    background: var(--bg-primary);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    transform: translateX(100%); /* HIDDEN OFF-SCREEN TO THE RIGHT */
    transition: transform 0.3s ease-in-out;
    overflow-y: auto;
    z-index: 10000;
}

.mobile-sidebar.open .mobile-sidebar-content {
    transform: translateX(0); /* SLIDES IN */
}

.mobile-sidebar-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--bg-secondary);
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.mobile-sidebar-link {
    display: block;
    padding: 16px 20px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}

.mobile-sidebar-link:hover {
    background: var(--bg-secondary);
    color: var(--color-primary);
}

/* Hide desktop menu on mobile phones */
@media (max-width: 768px) {
    .main-nav {
        display: none !important;
    }
}





/* Professional Header Icons */
.header-actions .icon-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-primary);
    padding: 0;
}

.header-actions .icon-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 102, 204, 0.2);
}

/* Theme Toggle Icon */
#theme-toggle {
    font-size: 20px;
}

/* Search Overlay Close Button */
.search-close {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 20px;
    transition: all 0.2s;
}

.search-close:hover {
    background: var(--color-danger);
    color: white;
    border-color: var(--color-danger);
}

/* Search Input */
.search-input {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    background: var(--bg-primary);
    color: var(--text-primary);
    margin-right: 10px;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* Search Submit Button */
.search-submit {
    background: var(--color-primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.search-submit:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 102, 204, 0.3);
}

/* Horizontal scrolling buttons */
.result-actions {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 10px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
}

.result-actions::-webkit-scrollbar {
    height: 4px;
}

.result-actions::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: 4px;
}

.result-actions .btn {
    white-space: nowrap;
    flex-shrink: 0;
    min-width: max-content;
}

@media (max-width: 768px) {
    .result-actions {
        overflow-x: scroll;
    }
}