/* ============================================
   CSS RESET DAN VARIABLES
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, 
                border-color 0.3s ease, 
                color 0.3s ease,
                box-shadow 0.3s ease,
                transform 0.3s ease;
}

:root {
    /* Light Theme Colors */
    --primary-color: #2c3e50;
    --primary-light: #3498db;
    --secondary-color: #34495e;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #9b59b6;
    --export-color: #ff6b6b;
    --offline-color: #e74c3c;
    --online-color: #27ae60;
    
    --bg-color: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f2f6;
    
    --text-color: #2c3e50;
    --text-secondary: #5a6268;
    --text-muted: #868e96;
    
    --card-bg: #ffffff;
    --card-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    --card-border: #e9ecef;
    
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --input-focus: rgba(44, 62, 80, 0.25);
    
    --header-bg: #ffffff;
    --footer-bg: #2c3e50;
    --footer-text: #ecf0f1;
    
    --status-ideal: #d5f4e6;
    --status-ideal-text: #27ae60;
    --status-low: #fdebd0;
    --status-low-text: #e67e22;
    --status-high: #fadbd8;
    --status-high-text: #e74c3c;
    
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --gradient-warning: linear-gradient(135deg, #f7971e 0%, #ffd200 100%);
    --gradient-danger: linear-gradient(135deg, #ff416c 0%, #ff4b2b 100%);
    --gradient-export: linear-gradient(135deg, #ff6b6b 0%, #ee5a52 100%);
    --gradient-offline: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    --gradient-online: linear-gradient(135deg, #27ae60 0%, #219653 100%);
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 36px rgba(0, 0, 0, 0.15);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;
    
    --transition-fast: 150ms;
    --transition-normal: 300ms;
    --transition-slow: 500ms;
}

/* ============================================
   DARK THEME - NYAMAN DI MATA
   ============================================ */
body.dark-mode {
    --primary-color: #ffffff;
    --primary-light: #64b5f6;
    --secondary-color: #e0e0e0;
    --success-color: #4caf50;
    --danger-color: #f44336;
    --warning-color: #ff9800;
    --info-color: #9c27b0;
    --export-color: #ff8a80;
    --offline-color: #f44336;
    --online-color: #4caf50;
    
    --bg-color: #0a0a0a;
    --bg-secondary: #121212;
    --bg-tertiary: #1a1a1a;
    
    --text-color: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #707070;
    
    --card-bg: #1e1e1e;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    --card-border: #333333;
    
    --input-bg: #2a2a2a;
    --input-border: #444444;
    --input-focus: rgba(100, 181, 246, 0.4);
    
    --header-bg: #111111;
    --footer-bg: #111111;
    --footer-text: #cccccc;
    
    --status-ideal: #1b5e20;
    --status-ideal-text: #66bb6a;
    --status-low: #ff8f00;
    --status-low-text: #ffcc80;
    --status-high: #c62828;
    --status-high-text: #ef9a9a;
    
    --gradient-primary: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    --gradient-success: linear-gradient(135deg, #0d5c3e 0%, #1a936f 100%);
    --gradient-warning: linear-gradient(135deg, #e65100 0%, #ff9800 100%);
    --gradient-danger: linear-gradient(135deg, #b71c1c 0%, #f44336 100%);
    --gradient-export: linear-gradient(135deg, #ff5252 0%, #ff8a80 100%);
    --gradient-offline: linear-gradient(135deg, #b71c1c 0%, #f44336 100%);
    --gradient-online: linear-gradient(135deg, #0d5c3e 0%, #1a936f 100%);
}

/* ============================================
   BASE STYLES
   ============================================ */

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

body:not(.dark-mode) {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

body.dark-mode {
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
}

/* ============================================
   CONTAINER
   ============================================ */

.container {
    max-width: 1400px;
    margin: 0 auto;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    padding: var(--space-xl);
    position: relative;
    border: 1px solid var(--card-border);
}

/* ============================================
   DARK MODE TOGGLE
   ============================================ */

.dark-mode-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--text-color);
    border: 2px solid var(--card-border);
    cursor: pointer;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.dark-mode-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: var(--shadow-xl);
    background: var(--gradient-primary);
    color: white;
}

.dark-mode-toggle:active {
    transform: scale(0.95);
}

body.dark-mode .dark-mode-toggle {
    background: var(--gradient-primary);
    color: white;
}

/* ============================================
   ENHANCED HEADER & NAVIGATION
   ============================================ */

header {
    margin-bottom: var(--space-xxl);
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--card-border);
    background: linear-gradient(90deg, transparent, var(--bg-tertiary), transparent);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    position: relative;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    gap: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--card-border);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header-logo h1 {
    font-family: 'Poppins', sans-serif;
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    color: var(--primary-color);
    margin: 0;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-logo i {
    font-size: 2rem;
    color: var(--primary-light);
}

.main-nav {
    display: block;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--space-md);
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    border: 1px solid transparent;
}

.main-nav a:hover {
    color: var(--primary-color);
    background-color: var(--bg-tertiary);
    border-color: var(--card-border);
    transform: translateY(-2px);
}

.main-nav a.active {
    color: var(--primary-color);
    background-color: var(--primary-light);
    color: white;
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}

.main-nav a i {
    font-size: 0.9rem;
}

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

/* Compact currency toggle */
.compact-currency-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.compact-currency-toggle .currency-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.compact-toggle-switch {
    display: flex;
    background-color: var(--card-bg);
    border-radius: 50px;
    padding: 3px;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--card-border);
}

.compact-currency-btn {
    padding: 6px 16px;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    background: transparent;
    color: var(--text-secondary);
    min-width: 60px;
}

.compact-currency-btn.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

header .subtitle {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
    font-weight: 400;
    text-align: center;
}

/* Online Status Badge */
.online-status-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    background: var(--bg-tertiary);
    border: 1px solid var(--card-border);
    z-index: 1;
}

.online-status-badge.online {
    color: var(--online-color);
    border-color: var(--online-color);
}

.online-status-badge.offline {
    color: var(--offline-color);
    border-color: var(--offline-color);
    animation: pulse 2s infinite;
}

.online-status-badge i {
    font-size: 0.7rem;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(231, 76, 60, 0); }
    100% { box-shadow: 0 0 0 0 rgba(231, 76, 60, 0); }
}

/* ============================================
   MOBILE MENU BUTTON
   ============================================ */

.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--text-color);
    border: 2px solid var(--card-border);
    cursor: pointer;
    z-index: 1000;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.mobile-menu-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
    background: var(--gradient-primary);
    color: white;
}

/* ============================================
   CURRENCY TOGGLE
   ============================================ */

.currency-toggle {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--space-xl);
    gap: var(--space-md);
    flex-wrap: wrap;
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border);
    display: none;
}

.currency-label {
    font-weight: 600;
    color: var(--text-color);
    font-size: 1.1rem;
}

.toggle-switch {
    display: flex;
    background-color: var(--card-bg);
    border-radius: 50px;
    padding: var(--space-xs);
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--card-border);
}

.currency-btn {
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    background: transparent;
    color: var(--text-secondary);
    min-width: 100px;
}

.currency-btn.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.currency-btn:hover:not(.active) {
    background: var(--bg-color);
    color: var(--text-color);
}

/* ============================================
   MAIN CONTENT LAYOUT
   ============================================ */

.main-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

/* ============================================
   INPUT SECTION
   ============================================ */

.input-section, .output-section {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
}

.input-section h2, .output-section h2 {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    font-weight: 600;
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--card-border);
}

/* ============================================
   FORM STYLES
   ============================================ */

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
    letter-spacing: 0.3px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--input-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-normal);
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: 'Roboto', sans-serif;
}

.form-group input:focus {
    border-color: var(--primary-light);
    outline: none;
    box-shadow: 0 0 0 3px var(--input-focus);
    transform: translateY(-1px);
}

.form-group input:hover {
    border-color: var(--primary-light);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.input-with-currency {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-currency input {
    padding-right: 80px;
}

.currency-display {
    position: absolute;
    right: 16px;
    color: var(--text-secondary);
    font-weight: 600;
    background-color: var(--bg-tertiary);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    border: 1px solid var(--card-border);
}

.hint {
    display: block;
    margin-top: var(--space-xs);
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.4;
}

/* ============================================
   BUTTONS
   ============================================ */

.button-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.btn {
    padding: 16px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    text-align: center;
    min-height: 52px;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(-1px);
}

.btn span {
    display: inline;
    position: relative;
    z-index: 1;
}

.btn i {
    font-size: 1.1rem;
    position: relative;
    z-index: 1;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn:disabled:hover::before {
    width: 0;
    height: 0;
}

/* Tombol Khusus */
.calculate-btn {
    background: var(--gradient-success);
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.3);
}

.calculate-btn:hover {
    box-shadow: 0 8px 25px rgba(39, 174, 96, 0.4);
}

.reset-btn {
    background: var(--gradient-danger);
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.reset-btn:hover {
    box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4);
}

.example-btn {
    background: var(--gradient-warning);
    box-shadow: 0 4px 15px rgba(243, 156, 18, 0.3);
}

.example-btn:hover {
    box-shadow: 0 8px 25px rgba(243, 156, 18, 0.4);
}

.export-btn {
    background: var(--gradient-export);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.export-btn:hover:not(:disabled) {
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
    background: linear-gradient(135deg, #ee5a52, #d64541);
}

.ebook-btn {
    background: var(--gradient-primary);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.ebook-btn:hover {
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
}

/* ============================================
   OUTPUT SECTION
   ============================================ */

.company-info {
    background: linear-gradient(135deg, var(--bg-tertiary), transparent);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    border-left: 4px solid var(--primary-light);
    border-right: 4px solid var(--primary-light);
}

#company-display {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: var(--space-xs);
    word-break: break-word;
    line-height: 1.3;
}

#year-display {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ============================================
   RESULTS CONTAINER
   ============================================ */

.results-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.result-card {
    background: linear-gradient(145deg, var(--card-bg), var(--bg-tertiary));
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--card-border);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    min-height: 140px;
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.result-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.result-card.highlight {
    background: linear-gradient(145deg, var(--card-bg), var(--status-ideal));
    border: 2px solid var(--status-ideal-text);
}

.result-card.highlight::before {
    background: var(--gradient-success);
}

.result-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    font-weight: 600;
    flex: 0 0 auto;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-value {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: var(--space-xs);
    font-family: 'Poppins', sans-serif;
    flex: 1 0 auto;
    display: flex;
    align-items: center;
    line-height: 1.2;
}

.currency-label-result {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
    flex: 0 0 auto;
    opacity: 0.9;
}

.result-status {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 20px;
    display: inline-block;
    margin-top: var(--space-sm);
    width: fit-content;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* Status Colors */
.status-ideal {
    background: linear-gradient(135deg, var(--status-ideal), transparent);
    color: var(--status-ideal-text);
    border: 1px solid var(--status-ideal-text);
}

.status-low {
    background: linear-gradient(135deg, var(--status-low), transparent);
    color: var(--status-low-text);
    border: 1px solid var(--status-low-text);
}

.status-high {
    background: linear-gradient(135deg, var(--status-high), transparent);
    color: var(--status-high-text);
    border: 1px solid var(--status-high-text);
}

/* ============================================
   VALUATION SUMMARY
   ============================================ */

.valuation-summary {
    background: linear-gradient(135deg, var(--bg-tertiary), transparent);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    border-left: 4px solid var(--info-color);
    border-right: 4px solid var(--info-color);
}

.valuation-summary h3 {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.3rem;
    font-weight: 600;
}

#valuation-text {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-color);
}

#valuation-text strong {
    color: var(--primary-light);
    font-weight: 700;
}

#valuation-text ul {
    margin: var(--space-md) 0 var(--space-md) var(--space-xl);
}

#valuation-text li {
    margin-bottom: var(--space-xs);
    position: relative;
}

#valuation-text li::before {
    content: '•';
    color: var(--primary-light);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
    font-size: 1.2em;
}

/* ============================================
   DONATION SECTION
   ============================================ */

.donation-section {
    text-align: center;
    background: linear-gradient(135deg, var(--bg-tertiary), var(--card-border));
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
    border: 1px solid var(--card-border);
    position: relative;
    overflow: hidden;
}

.donation-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
    opacity: 0.05;
}

.donation-section h3 {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: 1.5rem;
    font-weight: 600;
    position: relative;
}

.donation-section p {
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--space-lg);
    font-size: 1.1rem;
    line-height: 1.6;
    position: relative;
}

.donation-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    background: var(--gradient-warning);
    color: white;
    padding: 16px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    margin-top: var(--space-sm);
    transition: all var(--transition-normal);
    box-shadow: 0 6px 20px rgba(243, 156, 18, 0.3);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
    min-width: 200px;
}

.donation-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 10px 30px rgba(243, 156, 18, 0.4);
    color: white;
}

.donation-btn:active {
    transform: translateY(-1px) scale(1.02);
}

.donation-note {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: var(--space-lg);
    font-style: italic;
    position: relative;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
    background: linear-gradient(135deg, var(--footer-bg), #1a1a1a);
    color: var(--footer-text);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    margin-top: var(--space-xl);
    border-top: 1px solid var(--card-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-xl);
}

.footer-logo {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: white;
    flex-direction: column;
    align-items: flex-start;
}

.app-version {
    font-size: 0.8rem;
    background: var(--bg-tertiary);
    padding: 4px 8px;
    border-radius: 10px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.footer-info {
    flex: 1;
    min-width: 300px;
}

.footer-info p {
    margin-bottom: var(--space-sm);
    color: var(--footer-text);
    font-size: 0.95rem;
    line-height: 1.5;
}

.storage-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 10px 0;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    font-size: 0.9rem;
}

.storage-info i {
    color: var(--primary-light);
}

.copyright {
    font-weight: 600;
    color: #ffffff;
    font-size: 1rem;
}

.disclaimer {
    font-size: 0.85rem;
    color: #cccccc;
    font-style: italic;
    margin-top: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-md);
    line-height: 1.5;
}

/* ============================================
   MOBILE MENU OVERLAY
   ============================================ */

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    z-index: 2000;
    display: none;
    opacity: 0;
    transition: opacity var(--transition-normal);
    backdrop-filter: blur(5px);
}

.mobile-menu-overlay.active {
    display: block;
    opacity: 1;
}

.mobile-menu-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 85%;
    max-width: 320px;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-color), var(--bg-secondary));
    padding: var(--space-xl) var(--space-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
    border-right: 1px solid var(--card-border);
}

.mobile-menu-overlay.active .mobile-menu-content {
    transform: translateX(0);
}

.close-mobile-menu {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.8rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.close-mobile-menu:hover {
    background-color: var(--bg-tertiary);
    transform: rotate(90deg);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    color: var(--primary-color);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--card-border);
}

.mobile-menu-header h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
}

.mobile-menu-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.mobile-menu-item {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    background-color: var(--bg-tertiary);
    color: var(--text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-weight: 500;
    transition: all var(--transition-normal);
    border: 1px solid var(--card-border);
    font-size: 1rem;
    text-align: left;
    cursor: pointer;
    width: 100%;
}

.mobile-menu-item:hover {
    background-color: var(--primary-light);
    color: white;
    transform: translateX(10px);
    border-color: var(--primary-light);
}

/* ============================================
   BACK TO TOP BUTTON
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: 80px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    border: 2px solid var(--card-border);
    cursor: pointer;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-xl);
}

/* ============================================
   CONNECTION STATUS INDICATOR
   ============================================ */

.connection-status {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: var(--card-bg);
    color: var(--text-color);
    border-radius: 50px;
    padding: 12px 20px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-normal);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
}

.connection-status.show {
    transform: translateY(0);
    opacity: 1;
}

.connection-status.online {
    border-left: 4px solid var(--online-color);
}

.connection-status.offline {
    border-left: 4px solid var(--offline-color);
    animation: pulse 2s infinite;
}

.status-content {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-content i {
    font-size: 1.2rem;
}

.connection-status.online .status-content i {
    color: var(--online-color);
}

.connection-status.offline .status-content i {
    color: var(--offline-color);
}

.status-text {
    font-weight: 600;
    font-size: 0.95rem;
}

/* ============================================
   OFFLINE FALLBACK
   ============================================ */

.offline-fallback {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(10px);
}

.offline-fallback.hidden {
    display: none;
}

.offline-content {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 500px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--card-border);
}

.offline-icon {
    font-size: 80px;
    color: var(--offline-color);
    margin-bottom: var(--space-lg);
}

.offline-content h2 {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    margin-bottom: var(--space-md);
    font-size: 1.8rem;
}

.offline-content p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    font-size: 1.1rem;
}

.offline-content ul {
    list-style: none;
    text-align: left;
    margin: var(--space-lg) 0;
    padding: 0;
}

.offline-content li {
    padding: 10px 0;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.offline-content li i {
    color: var(--success-color);
}

.offline-reload-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: var(--space-lg);
}

.offline-reload-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   PWA INSTALL PROMPT
   ============================================ */

.pwa-install-prompt {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-xl);
    z-index: 1001;
    max-width: 350px;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    animation: slideIn 0.3s ease;
}

.pwa-install-prompt.hidden {
    display: none;
}

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

.pwa-install-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.pwa-install-header i {
    font-size: 1.5rem;
    color: var(--primary-light);
}

.pwa-install-title {
    font-weight: 600;
    color: var(--text-color);
    font-size: 1.1rem;
}

.pwa-install-body {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.5;
}

.pwa-install-actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: flex-end;
}

.pwa-install-btn {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.pwa-install-btn.primary {
    background: var(--gradient-primary);
    color: white;
}

.pwa-install-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pwa-install-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-color);
}

.pwa-install-btn.secondary:hover {
    background: var(--bg-color);
}

/* ============================================
   PDF EXPORT MODAL
   ============================================ */

.pdf-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 4000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
}

.pdf-modal.active {
    display: flex;
}

.pdf-modal-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.pdf-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
}

.pdf-modal-header h3 {
    margin: 0;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pdf-modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s;
}

.pdf-modal-close:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.pdf-preview {
    padding: 30px;
    max-height: 60vh;
    overflow-y: auto;
}

.pdf-preview-content {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 30px;
    font-family: Arial, sans-serif;
}

.pdf-preview-content h1 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 2rem;
}

.pdf-preview-content h2 {
    color: #34495e;
    margin: 25px 0 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #3498db;
}

.pdf-preview-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.pdf-preview-content th {
    background: #3498db;
    color: white;
    padding: 12px;
    text-align: left;
}

.pdf-preview-content td {
    padding: 12px;
    border-bottom: 1px solid #ddd;
}

.pdf-preview-content tr:nth-child(even) {
    background: #f2f2f2;
}

.pdf-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    padding: 20px 30px;
    background: #f8f9fa;
    border-top: 1px solid #ddd;
}

.pdf-action-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
}

.pdf-action-btn.download {
    background: #27ae60;
    color: white;
}

.pdf-action-btn.download:hover {
    background: #219653;
}

.pdf-action-btn.print {
    background: #3498db;
    color: white;
}

.pdf-action-btn.print:hover {
    background: #2980b9;
}

.pdf-action-btn.cancel {
    background: #e74c3c;
    color: white;
}

.pdf-action-btn.cancel:hover {
    background: #c0392b;
}

/* PDF Loading Animation */
.pdf-loading {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 5000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    color: white;
}

.pdf-loading.active {
    display: flex;
}

.pdf-loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

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

.pdf-loading-text {
    font-size: 1.2rem;
    margin-top: 10px;
}

/* Dark mode untuk PDF Modal */
body.dark-mode .pdf-modal-content {
    background: var(--card-bg);
    color: var(--text-color);
}

body.dark-mode .pdf-preview-content {
    background: var(--bg-tertiary);
    color: var(--text-color);
}

body.dark-mode .pdf-preview-content h1,
body.dark-mode .pdf-preview-content h2 {
    color: var(--primary-color);
}

body.dark-mode .pdf-preview-content table {
    color: var(--text-color);
}

body.dark-mode .pdf-preview-content th {
    background: var(--primary-light);
}

body.dark-mode .pdf-preview-content tr:nth-child(even) {
    background: var(--bg-color);
}

body.dark-mode .pdf-preview-content td {
    border-bottom: 1px solid var(--card-border);
}

body.dark-mode .pdf-modal-actions {
    background: var(--bg-tertiary);
    border-top: 1px solid var(--card-border);
}

/* ============================================
   NOTIFICATION STYLES
   ============================================ */

.notification-toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--card-bg), var(--bg-tertiary));
    color: var(--text-color);
    border-radius: var(--radius-md);
    padding: 18px 24px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    max-width: 380px;
    z-index: 3000;
    transform: translateY(100px) scale(0.9);
    opacity: 0;
    transition: all var(--transition-normal);
    border-left: 4px solid var(--primary-light);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
}

.notification-toast.show {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.notification-success {
    border-left-color: var(--success-color);
}

.notification-info {
    border-left-color: var(--info-color);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex: 1;
}

.notification-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 4px;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.notification-close:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-color);
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 5px;
    border: 2px solid var(--bg-tertiary);
}

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

body.dark-mode ::-webkit-scrollbar-thumb {
    background: #444;
}

body.dark-mode ::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* ============================================
   SELECTION STYLING
   ============================================ */

::selection {
    background-color: var(--primary-light);
    color: white;
}

body.dark-mode ::selection {
    background-color: var(--primary-light);
    color: var(--text-color);
}

/* ============================================
   FOCUS VISIBLE
   ============================================ */

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet (max-width: 1100px) */
@media (max-width: 1100px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .container {
        padding: var(--space-lg);
    }
    
    .results-container {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
    
    .compact-currency-toggle {
        display: none;
    }
    
    .currency-toggle {
        display: flex;
    }
    
    .main-nav {
        display: none;
    }
    
    .online-status-badge {
        position: relative;
        top: auto;
        right: auto;
        margin-top: var(--space-sm);
        justify-content: center;
        width: 100%;
    }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .dark-mode-toggle {
        top: 85px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    body {
        padding: 15px;
    }
    
    .container {
        padding: 20px 15px;
        border-radius: var(--radius-lg);
    }
    
    header {
        padding: var(--space-md);
    }
    
    .header-top {
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }
    
    .header-logo {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .header-logo h1 {
        font-size: 1.8rem;
    }
    
    .header-controls {
        width: 100%;
        justify-content: center;
    }
    
    header .subtitle {
        font-size: 0.95rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .input-section, .output-section {
        padding: var(--space-lg);
    }
    
    .button-group {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .btn {
        padding: 14px 20px;
        font-size: 0.9rem;
        min-height: 48px;
    }
    
    .btn span {
        font-size: 0.9rem;
    }
    
    .results-container {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .result-card {
        padding: var(--space-md);
        min-height: 120px;
    }
    
    .result-value {
        font-size: 1.6rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-lg);
    }
    
    .footer-info {
        min-width: 100%;
    }
    
    .currency-toggle {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: stretch;
        padding: var(--space-sm);
    }
    
    .toggle-switch {
        justify-content: center;
    }
    
    .currency-btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.9rem;
        min-width: 80px;
    }
    
    .donation-section {
        padding: var(--space-lg);
        margin: var(--space-lg) 0;
    }
    
    .donation-btn {
        padding: 14px 24px;
        font-size: 1rem;
        min-width: 180px;
    }
    
    .pdf-modal-content {
        width: 95%;
        margin: 10px;
    }
    
    .pdf-modal-actions {
        flex-direction: column;
    }
    
    .pdf-action-btn {
        width: 100%;
        justify-content: center;
    }
    
    .notification-toast {
        left: 20px;
        right: 20px;
        max-width: none;
        bottom: 70px;
    }
    
    .mobile-menu-content {
        width: 80%;
    }
    
    .back-to-top {
        bottom: 70px;
        right: 15px;
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
    
    .connection-status {
        bottom: 70px;
        left: 50%;
        transform: translateX(-50%) translateY(100px);
        width: 90%;
        max-width: 300px;
        justify-content: center;
    }
    
    .connection-status.show {
        transform: translateX(-50%) translateY(0);
    }
    
    .pwa-install-prompt {
        left: 50%;
        right: auto;
        transform: translateX(-50%);
        max-width: 90%;
    }
}

/* Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
    body {
        padding: 12px;
    }
    
    .container {
        padding: 16px 12px;
        border-radius: var(--radius-md);
    }
    
    header {
        padding: var(--space-sm);
    }
    
    .header-logo h1 {
        font-size: 1.6rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .input-section h2, .output-section h2 {
        font-size: 1.3rem;
    }
    
    .form-group input {
        padding: 12px 14px;
        font-size: 0.95rem;
    }
    
    .currency-display {
        right: 12px;
        padding: 5px 8px;
        font-size: 0.85rem;
    }
    
    .input-with-currency input {
        padding-right: 65px;
    }
    
    .result-value {
        font-size: 1.5rem;
    }
    
    .result-card {
        padding: var(--space-sm);
    }
    
    .donation-btn {
        width: 100%;
        padding: 12px 20px;
    }
    
    footer {
        padding: var(--space-lg);
    }
    
    .footer-logo {
        font-size: 1.5rem;
    }
    
    .dark-mode-toggle {
        top: 70px;
        right: 15px;
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
    
    .mobile-menu-btn {
        top: 15px;
        left: 15px;
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
    
    .offline-content {
        padding: var(--space-lg);
    }
    
    .offline-icon {
        font-size: 60px;
    }
    
    .offline-content h2 {
        font-size: 1.5rem;
    }
}

/* Landscape mode for mobile */
@media (max-height: 600px) and (orientation: landscape) {
    .dark-mode-toggle {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .mobile-menu-btn {
        top: 10px;
        left: 10px;
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .container {
        padding: 12px;
    }
    
    .button-group {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .results-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* High DPI Screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .btn, .donation-btn, .currency-btn {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Print styles */
@media print {
    .dark-mode-toggle,
    .mobile-menu-btn,
    .donation-section,
    .ebook-btn,
    .example-btn,
    .notification-toast,
    .export-btn,
    .back-to-top,
    .main-nav,
    .connection-status,
    .online-status-badge,
    .pwa-install-prompt,
    .storage-info {
        display: none !important;
    }
    
    body, .container, .input-section, .output-section, .result-card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
        color: #000 !important;
        background: white !important;
    }
    
    .btn {
        display: none !important;
    }
    
    .result-value, .result-label, #valuation-text {
        color: #000 !important;
    }
}

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

/* ============================================
   LOADING ANIMATION
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.container {
    animation: fadeIn 0.6s ease-out;
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --text-color: #000000;
        --online-color: #006600;
        --offline-color: #990000;
    }
    
    body.dark-mode {
        --primary-color: #ffffff;
        --text-color: #ffffff;
        --bg-color: #000000;
        --online-color: #00ff00;
        --offline-color: #ff0000;
    }
}