/* ========================================
   CSS Variables & Base Styles
======================================== */
:root {
    /* Light mode (default) */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;

    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --bg-card: rgba(255, 255, 255, 0.9);

    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;

    --border: rgba(148, 163, 184, 0.3);
    --border-hover: rgba(148, 163, 184, 0.5);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    --holiday-national: #ef4444;
    --holiday-religious: #8b5cf6;
    --holiday-cultural: #f59e0b;
    --holiday-other: #06b6d4;

    --gradient-bg-1: rgba(99, 102, 241, 0.08);
    --gradient-bg-2: rgba(245, 158, 11, 0.05);
}

/* Dark mode */
body.dark-mode {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.8);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border: rgba(148, 163, 184, 0.1);
    --border-hover: rgba(148, 163, 184, 0.2);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    --gradient-bg-1: rgba(99, 102, 241, 0.15);
    --gradient-bg-2: rgba(245, 158, 11, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    background-image:
        radial-gradient(ellipse at top, var(--gradient-bg-1) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, var(--gradient-bg-2) 0%, transparent 50%);
    background-attachment: fixed;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ========================================
   Theme Toggle Button
======================================== */
.header-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.theme-toggle {
    position: relative;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.theme-toggle:hover .theme-icon {
    color: white;
}

.theme-icon {
    position: absolute;
    transition: transform 0.4s ease, opacity 0.3s ease;
}

/* Light mode: show sun, hide moon */
.theme-icon.sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.theme-icon.moon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

/* Dark mode: show moon, hide sun */
body.dark-mode .theme-icon.sun {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

body.dark-mode .theme-icon.moon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* ========================================
   App Container
======================================== */
.app-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

/* ========================================
   Header Styles
======================================== */
.header {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 20px 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.title {
    font-size: 1.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
    flex-shrink: 0;
}

.year-selector {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--bg-tertiary);
    padding: 8px 16px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

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

.nav-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: scale(1.05);
}

.current-year {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
    min-width: 80px;
    text-align: center;
}

/* ========================================
   Quick Stats Section
======================================== */
.quick-stats {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 20px 24px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
}

.stats-header {
    margin-bottom: 16px;
}

.stats-title {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
}

.stats-icon {
    font-size: 1.2rem;
}

.stats-ranking {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.rank-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    flex: 1;
    min-width: 200px;
    max-width: 300px;
    transition: var(--transition);
}

.rank-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.rank-item.top-1 {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(255, 215, 0, 0.05) 100%);
    border-color: rgba(255, 215, 0, 0.3);
}

.rank-item.top-2 {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.15) 0%, rgba(192, 192, 192, 0.05) 100%);
    border-color: rgba(192, 192, 192, 0.3);
}

.rank-item.top-3 {
    background: linear-gradient(135deg, rgba(205, 127, 50, 0.15) 0%, rgba(205, 127, 50, 0.05) 100%);
    border-color: rgba(205, 127, 50, 0.3);
}

.rank-medal {
    font-size: 1.5rem;
    min-width: 30px;
    text-align: center;
}

.rank-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
}

.rank-info {
    flex: 1;
    min-width: 0;
}

.rank-month {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.rank-bar-container {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.rank-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 2px;
    transition: width 0.5s ease;
}

.rank-item.top-1 .rank-bar {
    background: linear-gradient(90deg, #ffd700 0%, #ffec8b 100%);
}

.rank-item.top-2 .rank-bar {
    background: linear-gradient(90deg, #c0c0c0 0%, #e8e8e8 100%);
}

.rank-item.top-3 .rank-bar {
    background: linear-gradient(90deg, #cd7f32 0%, #daa520 100%);
}

.rank-count {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-light);
    text-align: right;
    min-width: 50px;
}

.rank-count span {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--text-muted);
    display: block;
}

.stats-empty {
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 20px;
    text-align: center;
}

/* ========================================
   Long Weekend Section
======================================== */
.long-weekend-section {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.lw-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

/* Summary Badges */
.lw-summary {
    display: flex;
    gap: 8px;
}

.lw-summary-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    min-width: 60px;
}

.lw-summary-item.total {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(99, 102, 241, 0.05) 100%);
    border-color: rgba(99, 102, 241, 0.3);
}

.lw-summary-item.natural {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(16, 185, 129, 0.05) 100%);
    border-color: rgba(16, 185, 129, 0.3);
}

.lw-summary-item.cuti {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(245, 158, 11, 0.05) 100%);
    border-color: rgba(245, 158, 11, 0.3);
}

.lw-summary-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.lw-summary-item.total .lw-summary-number {
    color: var(--primary-light);
}

.lw-summary-item.natural .lw-summary-number {
    color: var(--success);
}

.lw-summary-item.cuti .lw-summary-number {
    color: var(--secondary);
}

.lw-summary-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 500;
}

/* Legend */
.lw-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.lw-legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.lw-legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

.lw-legend-item.natural .lw-legend-color {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
}

.lw-legend-item.cuti .lw-legend-color {
    background: linear-gradient(135deg, var(--secondary) 0%, #d97706 100%);
}

.long-weekend-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
}

/* Long Weekend Card */
.lw-item {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.lw-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.lw-item.natural {
    border-left: 4px solid var(--success);
}

.lw-item.cuti {
    border-left: 4px solid var(--secondary);
}

.lw-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.lw-badge {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
}

.lw-item.natural .lw-badge {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
}

.lw-item.cuti .lw-badge {
    background: linear-gradient(135deg, var(--secondary) 0%, #d97706 100%);
}

.lw-type-badge {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--bg-tertiary);
}

.lw-type-badge.natural {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.lw-type-badge.cuti {
    background: rgba(245, 158, 11, 0.15);
    color: var(--secondary);
}

.lw-item-body {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.lw-holiday-name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.lw-date-range {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.lw-calendar-icon {
    font-size: 0.9rem;
}

/* Days Visualization */
.lw-days-visual {
    display: flex;
    gap: 4px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

.lw-day {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 42px;
    padding: 8px 6px;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.lw-day:hover {
    transform: scale(1.05);
}

.lw-day.holiday {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.25) 0%, rgba(239, 68, 68, 0.1) 100%);
    border-color: rgba(239, 68, 68, 0.4);
}

.lw-day.weekend {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.25) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-color: rgba(139, 92, 246, 0.4);
}

.lw-day.cuti {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.25) 0%, rgba(245, 158, 11, 0.1) 100%);
    border-color: rgba(245, 158, 11, 0.4);
}

.lw-day-name {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}

.lw-day.holiday .lw-day-name {
    color: var(--danger);
}

.lw-day.weekend .lw-day-name {
    color: var(--holiday-religious);
}

.lw-day.cuti .lw-day-name {
    color: var(--secondary);
}

.lw-day-num {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.lw-day-type {
    font-size: 0.8rem;
    margin-top: 2px;
}

/* Note */
.lw-note {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: var(--secondary);
    border: 1px dashed rgba(245, 158, 11, 0.3);
}

.lw-note-icon {
    font-size: 1rem;
}

/* Day Legend inside card */
.lw-day-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding-top: 8px;
    border-top: 1px solid var(--border);
    margin-top: 4px;
}

.lw-day-legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.lw-legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 2px;
}

.lw-legend-dot.holiday {
    background: var(--danger);
}

.lw-legend-dot.weekend {
    background: var(--holiday-religious);
}

.lw-legend-dot.cuti {
    background: var(--secondary);
}

@media (max-width: 768px) {
    .quick-stats {
        padding: 16px 20px;
    }

    .stats-ranking {
        flex-direction: column;
    }

    .rank-item {
        max-width: none;
    }

    .long-weekend-list {
        grid-template-columns: 1fr;
    }

    .lw-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .lw-summary {
        width: 100%;
        justify-content: space-between;
    }

    .lw-legend {
        flex-direction: column;
        gap: 8px;
    }

    .lw-days-visual {
        padding: 10px 8px;
    }

    .lw-day {
        min-width: 38px;
        padding: 6px 4px;
    }
}

/* ========================================
   Calendar Grid
======================================== */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

@media (max-width: 1200px) {
    .calendar-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 900px) {
    .calendar-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .calendar-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Month Card Styles
======================================== */
.month-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 16px;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.month-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.month-header {
    text-align: center;
    padding-bottom: 12px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.month-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-light);
}

.weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    margin-bottom: 8px;
}

.weekday {
    text-align: center;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    padding: 4px 0;
    text-transform: uppercase;
}

.weekday:first-child {
    color: var(--danger);
}

.days-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
}

.day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.day:hover:not(.empty) {
    background: var(--bg-tertiary);
}

.day.empty {
    cursor: default;
}

.day.today {
    background: var(--primary);
    color: white;
    font-weight: 700;
}

.day.sunday {
    color: var(--danger);
}

.day.holiday {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(239, 68, 68, 0.1) 100%);
    color: var(--danger);
    font-weight: 600;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.day.holiday::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--danger);
    border-radius: 50%;
}

.day.holiday.religious {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2) 0%, rgba(139, 92, 246, 0.1) 100%);
    color: var(--holiday-religious);
    border-color: rgba(139, 92, 246, 0.3);
}

.day.holiday.religious::after {
    background: var(--holiday-religious);
}

.day.holiday.cultural {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(245, 158, 11, 0.1) 100%);
    color: var(--holiday-cultural);
    border-color: rgba(245, 158, 11, 0.3);
}

.day.holiday.cultural::after {
    background: var(--holiday-cultural);
}

.day.holiday.other {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.2) 0%, rgba(6, 182, 212, 0.1) 100%);
    color: var(--holiday-other);
    border-color: rgba(6, 182, 212, 0.3);
}

.day.holiday.other::after {
    background: var(--holiday-other);
}

/* Tooltip for holiday name */
.day[data-tooltip]:hover::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    white-space: nowrap;
    z-index: 100;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    margin-bottom: 4px;
}

/* ========================================
   Month Holiday List (inside each month card)
======================================== */
.month-holidays {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.month-holiday-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    background: rgba(239, 68, 68, 0.1);
    border-left: 3px solid var(--holiday-national);
}

.month-holiday-item.religious {
    background: rgba(139, 92, 246, 0.1);
    border-left-color: var(--holiday-religious);
}

.month-holiday-item.cultural {
    background: rgba(245, 158, 11, 0.1);
    border-left-color: var(--holiday-cultural);
}

.month-holiday-item.other {
    background: rgba(6, 182, 212, 0.1);
    border-left-color: var(--holiday-other);
}

.month-holiday-date {
    font-weight: 700;
    min-width: 20px;
    color: var(--text-secondary);
}

.month-holiday-name {
    color: var(--text-primary);
    line-height: 1.3;
}

/* ========================================
   Holidays Section
======================================== */
.holidays-section {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 30px;
    box-shadow: var(--shadow-lg);
}

.holidays-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}

.holidays-title {
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.holidays-icon {
    font-size: 1.3rem;
}

.add-holiday-btn {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.add-holiday-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.holidays-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 12px;
}

.holiday-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.holiday-item:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.holiday-date {
    background: var(--bg-tertiary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.85rem;
    min-width: 50px;
    text-align: center;
}

.holiday-info {
    flex: 1;
}

.holiday-name {
    font-weight: 500;
    margin-bottom: 2px;
}

.holiday-type {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 20px;
    display: inline-block;
}

.holiday-type.national {
    background: rgba(239, 68, 68, 0.2);
    color: var(--holiday-national);
}

.holiday-type.religious {
    background: rgba(139, 92, 246, 0.2);
    color: var(--holiday-religious);
}

.holiday-type.cultural {
    background: rgba(245, 158, 11, 0.2);
    color: var(--holiday-cultural);
}

.holiday-type.other {
    background: rgba(6, 182, 212, 0.2);
    color: var(--holiday-other);
}

.holiday-actions {
    display: flex;
    gap: 6px;
}

.holiday-action-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.holiday-action-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.holiday-action-btn.delete:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--danger);
    color: var(--danger);
}

/* ========================================
   Modal Styles
======================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    padding: 20px;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 450px;
    transform: scale(0.9) translateY(20px);
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-form {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

.btn {
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

/* ========================================
   Toast Notification
======================================== */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 14px 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}

.toast.success {
    border-color: var(--success);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(16, 185, 129, 0.1) 100%);
}

.toast.error {
    border-color: var(--danger);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(239, 68, 68, 0.1) 100%);
}

.toast-message {
    font-size: 0.9rem;
    font-weight: 500;
}

/* ========================================
   Empty State
======================================== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 1rem;
}

/* ========================================
   Responsive Adjustments
======================================== */

/* Tablet Landscape */
@media (max-width: 1024px) {
    .app-container {
        padding: 16px;
    }

    .header {
        padding: 18px 24px;
    }

    .rank-item {
        min-width: 180px;
    }
}

/* Tablet Portrait & Small Tablets */
@media (max-width: 768px) {
    html {
        font-size: 15px;
    }

    .app-container {
        padding: 12px;
    }

    .header {
        padding: 16px 18px;
        border-radius: var(--radius-lg);
        margin-bottom: 20px;
    }

    .header-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .title {
        font-size: 1.25rem;
        justify-content: center;
        flex-wrap: wrap;
    }

    .title-icon {
        font-size: 1.3rem;
    }

    .year-selector {
        width: 100%;
        justify-content: center;
        padding: 10px 16px;
    }

    .nav-btn {
        width: 40px;
        height: 40px;
    }

    .current-year {
        font-size: 1.4rem;
    }

    /* Quick Stats */
    .quick-stats {
        padding: 16px;
        margin-bottom: 20px;
        border-radius: var(--radius-lg);
    }

    .stats-header {
        margin-bottom: 14px;
    }

    .stats-title {
        font-size: 0.95rem;
    }

    .stats-ranking {
        flex-direction: column;
        gap: 10px;
    }

    .rank-item {
        max-width: none;
        min-width: auto;
        padding: 14px;
    }

    .rank-medal {
        font-size: 1.4rem;
    }

    .rank-month {
        font-size: 0.95rem;
    }

    .rank-count {
        font-size: 1rem;
    }

    /* Long Weekend */
    .long-weekend-section {
        margin-top: 20px;
        padding-top: 20px;
    }

    .long-weekend-list {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .lw-item {
        padding: 12px 14px;
    }

    .lw-badge {
        padding: 5px 8px;
        font-size: 0.7rem;
    }

    .lw-holiday {
        font-size: 0.85rem;
    }

    /* Calendar Grid */
    .calendar-grid {
        gap: 16px;
        margin-bottom: 30px;
    }

    /* Month Card */
    .month-card {
        padding: 14px;
        border-radius: var(--radius-md);
    }

    .month-header {
        padding-bottom: 10px;
        margin-bottom: 10px;
    }

    .month-name {
        font-size: 1rem;
    }

    .weekday {
        font-size: 0.65rem;
        padding: 3px 0;
    }

    .day {
        font-size: 0.75rem;
    }

    .day[data-tooltip]:hover::before {
        font-size: 0.65rem;
        padding: 5px 8px;
    }

    /* Month Holidays List */
    .month-holidays {
        margin-top: 10px;
        padding-top: 10px;
        gap: 5px;
    }

    .month-holiday-item {
        padding: 5px 7px;
        font-size: 0.7rem;
    }

    .month-holiday-date {
        min-width: 18px;
    }

    /* Holidays Section */
    .holidays-section {
        padding: 20px;
        border-radius: var(--radius-lg);
    }

    .holidays-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .holidays-title {
        font-size: 1.1rem;
    }

    .add-holiday-btn {
        width: 100%;
        justify-content: center;
    }

    .holidays-list {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .holiday-item {
        padding: 12px 14px;
        flex-wrap: wrap;
        gap: 10px;
    }

    .holiday-date {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .holiday-actions {
        width: 100%;
        justify-content: flex-end;
    }

    /* Modal */
    .modal {
        max-width: none;
        margin: 0 12px;
        border-radius: var(--radius-lg);
    }

    .modal-header {
        padding: 16px 18px;
    }

    .modal-form {
        padding: 18px;
    }

    .form-group {
        margin-bottom: 16px;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
        justify-content: center;
    }
}

/* Mobile Phones */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .app-container {
        padding: 10px;
    }

    .header {
        padding: 14px 16px;
    }

    .title {
        font-size: 1.1rem;
        gap: 8px;
    }

    .title-icon {
        font-size: 1.2rem;
    }

    .year-selector {
        padding: 8px 14px;
        gap: 12px;
    }

    .nav-btn {
        width: 38px;
        height: 38px;
    }

    .current-year {
        font-size: 1.3rem;
        min-width: 70px;
    }

    /* Quick Stats */
    .quick-stats {
        padding: 14px;
    }

    .stats-title {
        font-size: 0.9rem;
        flex-wrap: wrap;
    }

    .stats-icon {
        font-size: 1rem;
    }

    .rank-item {
        padding: 12px;
        gap: 10px;
    }

    .rank-medal {
        font-size: 1.2rem;
        min-width: 26px;
    }

    .rank-month {
        font-size: 0.88rem;
    }

    .rank-count {
        font-size: 0.95rem;
        min-width: 45px;
    }

    .rank-count span {
        font-size: 0.65rem;
    }

    /* Long Weekend */
    .long-weekend-section {
        margin-top: 16px;
        padding-top: 16px;
    }

    .lw-item {
        padding: 10px 12px;
        gap: 10px;
    }

    .lw-badge {
        padding: 4px 7px;
        font-size: 0.68rem;
    }

    .lw-holiday {
        font-size: 0.82rem;
    }

    .lw-dates {
        font-size: 0.75rem;
        gap: 6px;
    }

    .lw-range {
        padding: 2px 6px;
    }

    .lw-note {
        font-size: 0.7rem;
        padding: 3px 6px;
    }

    /* Calendar Grid */
    .calendar-grid {
        gap: 12px;
        margin-bottom: 24px;
    }

    /* Month Card */
    .month-card {
        padding: 12px;
    }

    .month-header {
        padding-bottom: 8px;
        margin-bottom: 8px;
    }

    .month-name {
        font-size: 0.95rem;
    }

    .weekdays {
        margin-bottom: 6px;
    }

    .weekday {
        font-size: 0.6rem;
        padding: 2px 0;
    }

    .days-grid {
        gap: 1px;
    }

    .day {
        font-size: 0.72rem;
        border-radius: 4px;
    }

    .day.holiday::after {
        width: 3px;
        height: 3px;
        bottom: 1px;
    }

    /* Tooltip adjustment for mobile - disable hover tooltip, use touch instead */
    .day[data-tooltip]:hover::before {
        display: none;
    }

    /* Month Holidays List */
    .month-holidays {
        margin-top: 8px;
        padding-top: 8px;
        gap: 4px;
    }

    .month-holiday-item {
        padding: 4px 6px;
        font-size: 0.68rem;
        gap: 6px;
    }

    .month-holiday-date {
        min-width: 16px;
        font-size: 0.68rem;
    }

    .month-holiday-name {
        line-height: 1.25;
    }

    /* Holidays Section */
    .holidays-section {
        padding: 16px;
    }

    .holidays-title {
        font-size: 1rem;
    }

    .holidays-icon {
        font-size: 1.1rem;
    }

    .add-holiday-btn {
        padding: 10px 16px;
        font-size: 0.85rem;
    }

    .holiday-item {
        padding: 10px 12px;
    }

    .holiday-name {
        font-size: 0.9rem;
    }

    .holiday-type {
        font-size: 0.7rem;
    }

    .holiday-action-btn {
        width: 30px;
        height: 30px;
    }

    /* Modal */
    .modal-overlay {
        padding: 12px;
    }

    .modal {
        margin: 0;
    }

    .modal-header {
        padding: 14px 16px;
    }

    .modal-title {
        font-size: 1rem;
    }

    .modal-form {
        padding: 16px;
    }

    .form-group label {
        font-size: 0.85rem;
    }

    .form-group input,
    .form-group select {
        padding: 10px 14px;
        font-size: 0.9rem;
    }

    .form-actions {
        margin-top: 20px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.85rem;
    }

    /* Toast */
    .toast {
        left: 12px;
        right: 12px;
        transform: translateX(0) translateY(100px);
        padding: 12px 20px;
    }

    .toast.show {
        transform: translateX(0) translateY(0);
    }

    .toast-message {
        font-size: 0.85rem;
    }

    /* Empty State */
    .empty-state {
        padding: 30px 16px;
    }

    .empty-state-icon {
        font-size: 2.5rem;
    }

    .empty-state-text {
        font-size: 0.9rem;
    }
}

/* Small Mobile Phones */
@media (max-width: 360px) {
    .app-container {
        padding: 8px;
    }

    .header {
        padding: 12px 14px;
    }

    .title {
        font-size: 1rem;
    }

    .year-selector {
        padding: 6px 12px;
        gap: 10px;
    }

    .nav-btn {
        width: 34px;
        height: 34px;
    }

    .nav-btn svg {
        width: 16px;
        height: 16px;
    }

    .current-year {
        font-size: 1.2rem;
        min-width: 60px;
    }

    .quick-stats {
        padding: 12px;
    }

    .stats-title {
        font-size: 0.85rem;
        gap: 8px;
    }

    .rank-item {
        padding: 10px;
    }

    .rank-medal {
        font-size: 1.1rem;
    }

    .rank-month {
        font-size: 0.82rem;
    }

    .rank-count {
        font-size: 0.9rem;
    }

    .month-card {
        padding: 10px;
    }

    .month-name {
        font-size: 0.9rem;
    }

    .weekday {
        font-size: 0.55rem;
    }

    .day {
        font-size: 0.68rem;
    }

    .month-holiday-item {
        font-size: 0.65rem;
    }
}

/* Touch-friendly improvements for mobile */
@media (hover: none) and (pointer: coarse) {
    .nav-btn {
        min-width: 44px;
        min-height: 44px;
    }

    .day:not(.empty) {
        min-width: 32px;
        min-height: 32px;
    }

    .holiday-action-btn {
        min-width: 44px;
        min-height: 44px;
    }

    .btn {
        min-height: 44px;
    }

    /* Remove hover effects that don't work well on touch */
    .month-card:hover {
        transform: none;
    }

    .rank-item:hover {
        transform: none;
    }

    .lw-item:hover {
        transform: none;
    }

    .holiday-item:hover {
        transform: none;
    }

    .nav-btn:hover {
        transform: none;
    }
}

/* Landscape mode on mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .header {
        padding: 10px 16px;
        margin-bottom: 12px;
    }

    .header-content {
        flex-direction: row;
        gap: 16px;
    }

    .title {
        font-size: 1.1rem;
    }

    .year-selector {
        width: auto;
    }

    .quick-stats {
        padding: 12px;
        margin-bottom: 12px;
    }

    .stats-ranking {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .rank-item {
        min-width: 150px;
        flex: 1;
    }

    .long-weekend-list {
        grid-template-columns: repeat(2, 1fr);
    }

    .calendar-grid {
        gap: 12px;
    }

    .month-card {
        padding: 10px;
    }
}

/* ========================================
   Scrollbar Styling
======================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========================================
   Selection Styling
======================================== */
::selection {
    background: var(--primary);
    color: white;
}

/* ========================================
   Header Subtitle (SEO)
======================================== */
.header-subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 8px;
    font-weight: 400;
    line-height: 1.5;
}

.header-subtitle strong {
    color: var(--primary-light);
    font-weight: 500;
}

/* ========================================
   SEO Content Section
======================================== */
.seo-content {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 30px 40px;
    margin-top: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
}

.seo-article h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.seo-article h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-top: 24px;
    margin-bottom: 12px;
}

.seo-article p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.seo-article strong {
    color: var(--text-primary);
    font-weight: 600;
}

.holiday-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.holiday-list li {
    background: var(--bg-secondary);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: var(--transition);
}

.holiday-list li:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.holiday-list li strong {
    color: var(--danger);
    font-weight: 700;
}

/* ========================================
   Site Footer
======================================== */
.site-footer {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 30px 40px;
    margin-top: 20px;
    box-shadow: var(--shadow-md);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-info h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: 8px;
}

.footer-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-info strong {
    color: var(--text-primary);
    font-weight: 500;
}

.footer-links p {
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    padding-top: 16px;
    margin-top: 8px;
}

/* Responsive SEO Section & Footer */
@media (max-width: 768px) {
    .header-subtitle {
        font-size: 0.85rem;
        text-align: center;
    }

    .seo-content {
        padding: 20px 24px;
    }

    .seo-article h2 {
        font-size: 1.25rem;
    }

    .seo-article h3 {
        font-size: 1rem;
    }

    .holiday-list {
        grid-template-columns: 1fr;
    }

    .site-footer {
        padding: 20px 24px;
    }
}