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

:root {
    /* Android app color scheme */
    --primary: #ffffce;
    --primary-dark: #e6e6b8;
    --accent: #d4a56f;
    --secondary: #b22b23;
    --title-color: #960000;
    --calendar-header-bg: #ffffce;
    --cell-bg: #fdfdf1;
    --cell-selected: #e2eefa;
    --cell-today: #ffff00;
    --cell-border: #d3d3c7;
    --text-primary: #000000;
    --text-secondary: #555555;
    --text-lunar: #3e42f6;
    --text-lunar-disabled: #bcb3ff;
    --text-sunday: #df2020;
    --text-saturday: #008000;
    --text-disabled: #acacac;
    --surface: #ffffff;
    --bg: #f8f8f0;
    --border: #e0e0e0;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --radius: 8px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

html, body {
    font-family: var(--font);
    font-size: 14px;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.4;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    height: 100%;
}

body {
    padding-bottom: env(safe-area-inset-bottom);
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    max-width: 500px;
    margin: 0 auto;
    background: var(--surface);
    position: relative;
}

/* === Top Navigation === */
.top-nav {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-icon-btn {
    background: none;
    border: none;
    font-size: 1.3rem;
    padding: 8px;
    cursor: pointer;
    color: var(--text-primary);
    border-radius: 50%;
    transition: background 0.2s;
}

.nav-icon-btn:hover {
    background: rgba(0,0,0,0.05);
}

.nav-title {
    flex: 1;
    text-align: center;
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--text-primary);
}

/* === Day Info Section (Top half - like Android) === */
.day-info-section {
    padding: 12px 16px 16px;
    text-align: center;
    background: var(--surface);
}

.big-day-row {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 4px;
}

.big-day-number {
    font-size: 72px;
    font-weight: bold;
    color: var(--text-primary);
    line-height: 1;
}

.btn-info-circle {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 4px;
    margin-top: 8px;
}

.day-of-week {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}

/* Two-column lunar info (like Android) */
.lunar-two-col {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 24px;
    margin: 8px 0;
}

.lunar-left {
    text-align: center;
    min-width: 120px;
}

.lunar-month-label {
    font-size: 1rem;
    color: var(--text-primary);
}

.lunar-day-big {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--text-primary);
    line-height: 1.2;
}

.lunar-year-label {
    font-size: 1rem;
    color: var(--text-primary);
}

.digital-clock {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.lunar-right {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 120px;
}

.canchi-line {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.canchi-line.tiet-khi {
    color: var(--accent);
    font-weight: 500;
}

/* Event text (red, centered) */
.event-text {
    font-size: 0.9rem;
    color: var(--text-sunday);
    text-align: center;
    margin: 8px 0;
    line-height: 1.5;
}

/* Giờ Hoàng Đạo */
.gio-hoang-dao {
    font-size: 0.85rem;
    color: var(--text-primary);
    text-align: center;
    margin: 6px 0;
}

/* Day Rating Badge */
.day-rating-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 8px;
    transition: opacity 0.2s;
}

.day-rating-badge:hover {
    opacity: 0.85;
}

.day-rating-badge.very-good { background: #c8e6c9; color: #1b5e20; }
.day-rating-badge.good { background: #dcedc8; color: #2e7d32; }
.day-rating-badge.normal { background: #fff9c4; color: #f57f17; }
.day-rating-badge.bad { background: #ffe0b2; color: #e65100; }
.day-rating-badge.very-bad { background: #ffcdd2; color: #b71c1c; }

/* === Calendar Sheet (Bottom part) === */
.calendar-sheet {
    background: var(--surface);
    border-top: 1px solid var(--cell-border);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.sheet-handle {
    display: flex;
    justify-content: center;
    padding: 12px 0 6px;
}

.handle-bar {
    width: 48px;
    height: 4px;
    background: #ccc;
    border-radius: 2px;
}

/* Month Navigation */
.month-nav {
    display: flex;
    align-items: center;
    padding: 4px 8px;
}

.month-nav-btn {
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    color: var(--text-primary);
}

.month-nav-btn:hover {
    background: rgba(0,0,0,0.05);
}

.month-nav-center {
    flex: 1;
    text-align: center;
}

.month-label {
    font-size: 1rem;
    font-weight: bold;
    color: var(--text-primary);
}

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

.year-label {
    font-size: 1rem;
    font-weight: bold;
    color: var(--accent);
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    transition: background 0.2s;
}

.year-label:hover {
    background: rgba(212, 165, 111, 0.15);
}

/* Weekday Header (like Android: cream background) */
.weekday-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    background: var(--calendar-header-bg);
    border-top: 1px solid var(--cell-border);
    border-bottom: 1px solid var(--cell-border);
    padding: 6px 0;
}

.weekday-header .wd {
    text-align: center;
    font-size: 1rem;
    font-weight: bold;
    color: var(--text-primary);
    padding: 4px 0;
}

.weekday-header .wd.sat { color: var(--text-saturday); }
.weekday-header .wd.sun { color: var(--text-sunday); }

/* Calendar Grid */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    background: var(--cell-border);
    gap: 1px;
    flex: 1;
}

.calendar-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4px 2px;
    min-height: 48px;
    background: var(--cell-bg);
    cursor: pointer;
    position: relative;
    transition: background 0.1s;
}

.calendar-cell:active {
    background: #e8e8e0;
}

.calendar-cell.outside {
    background: #f5f5f0;
}

.calendar-cell.outside .solar-day { color: var(--text-disabled); }
.calendar-cell.outside .lunar-day { color: var(--text-lunar-disabled); }

.calendar-cell.today {
    background: var(--cell-today);
}

.calendar-cell.selected {
    background: var(--cell-selected);
    outline: 2px solid var(--accent);
    outline-offset: -2px;
    border-radius: 2px;
}

.calendar-cell .solar-day {
    font-size: 1.05rem;
    color: var(--text-primary);
    line-height: 1.3;
}

.calendar-cell.sunday .solar-day { color: var(--text-sunday); }
.calendar-cell.saturday .solar-day { color: var(--text-saturday); }
.calendar-cell.outside.sunday .solar-day { color: #d58686; }
.calendar-cell.outside.saturday .solar-day { color: #7d8d7d; }

.calendar-cell .lunar-day {
    font-size: 0.7rem;
    color: var(--text-lunar);
    line-height: 1.2;
}

.calendar-cell .event-dot {
    position: absolute;
    bottom: 2px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--text-sunday);
}

/* === Sidebar (Drawer from left, like Android) === */
.sidebar-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 200;
    transition: opacity 0.3s;
}

.sidebar-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    max-width: 80vw;
    height: 100%;
    background: var(--surface);
    z-index: 201;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 4px 0 16px rgba(0,0,0,0.1);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.sidebar:not(.hidden) {
    transform: translateX(0);
}

.sidebar-banner {
    background: linear-gradient(135deg, #960000, #b22b23);
    padding: 32px 20px 24px;
    color: white;
    text-align: center;
}

.banner-icon {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.banner-title {
    font-size: 1.2rem;
    font-weight: 600;
}

.sidebar-menu {
    padding: 8px 12px;
    flex: 1;
}

.menu-item {
    display: block;
    padding: 12px 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 6px;
    transition: background 0.2s;
}

.menu-item:hover, .menu-item:active {
    background: #f5f5f5;
}

.menu-divider {
    height: 1px;
    background: #e0e0e0;
    margin: 2px 10px;
}

/* === Modals === */
.modal {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 300;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    transition: opacity 0.3s;
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: var(--surface);
    border-radius: 16px 16px 0 0;
    width: 100%;
    max-width: 500px;
    max-height: 85vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

.modal-full {
    max-height: 90vh;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.modal.hidden .modal-content {
    transform: translateY(100%);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--surface);
    z-index: 1;
}

.modal-title {
    font-size: 1rem;
    font-weight: 600;
}

.modal-body {
    padding: 16px;
}

.btn-close, .btn-share {
    background: none;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    padding: 4px 8px;
    color: var(--secondary);
    min-width: 36px;
    text-align: center;
}

/* === Date Detail Modal === */
#detail-body {
    font-size: 0.9rem;
    line-height: 1.8;
}

#detail-body h2 {
    text-align: center;
    font-size: 1.3rem;
    margin-bottom: 8px;
}

#detail-body .detail-hoang-dao {
    text-align: center;
    font-weight: 600;
}

#detail-body .detail-hoang-dao[data-hd="1"] {
    color: var(--text-sunday);
}

#detail-body p {
    margin: 6px 0;
    padding: 4px 0;
    border-bottom: 1px dashed #eee;
}

#detail-body .advice-section {
    margin-top: 12px;
}

#detail-body .advice-section h4 {
    margin-bottom: 6px;
}

#detail-body .advice-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 10px;
}

#detail-body .advice-tag {
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
}

#detail-body .advice-tag.good {
    background: #e8f5e9;
    color: #2e7d32;
}

#detail-body .advice-tag.bad {
    background: #fce4ec;
    color: #c62828;
}

#detail-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 8px 0;
}

#detail-body th, #detail-body td {
    border: 1px solid #ccc;
    padding: 6px;
    text-align: center;
    font-size: 0.85rem;
}

#detail-body th {
    background: #f5f5f5;
}

/* === Forms === */
.form-event {
    padding: 16px;
}

.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: var(--font);
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
}

.form-group textarea {
    resize: vertical;
    min-height: 60px;
}

.form-row {
    display: flex;
    gap: 8px;
}

.form-row .form-group {
    flex: 1;
}

.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--surface);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font);
}

.chip.active {
    background: var(--secondary);
    color: white;
    border-color: var(--secondary);
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

/* === Buttons === */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
    transition: opacity 0.2s;
}

.btn:hover { opacity: 0.9; }
.btn-primary { background: var(--secondary); color: white; }
.btn-danger { background: #d32f2f; color: white; }
.btn-block { display: block; width: 100%; margin-top: 16px; }

/* === Event List === */
.event-list-container {
    max-height: 60vh;
    overflow-y: auto;
}

.event-list-item {
    display: flex;
    align-items: center;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.event-list-item:hover { background: #f5f5f5; }

.event-list-item .event-icon { font-size: 1.5rem; margin-right: 12px; }
.event-list-item .event-details { flex: 1; }
.event-list-item .event-name { font-weight: 600; font-size: 0.9rem; }
.event-list-item .event-date { font-size: 0.8rem; color: var(--text-secondary); }

.event-list-item .event-toggle {
    width: 40px; height: 22px;
    border-radius: 11px; border: none;
    cursor: pointer; position: relative;
    transition: background 0.3s;
}

.event-toggle.on { background: #4caf50; }
.event-toggle.off { background: #bdbdbd; }

.event-toggle::after {
    content: '';
    position: absolute;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: white;
    top: 2px; left: 2px;
    transition: transform 0.3s;
}

.event-toggle.on::after { transform: translateX(18px); }

/* === Convert === */
.convert-section h4 {
    font-size: 0.9rem;
    margin-bottom: 8px;
    color: var(--title-color);
}

.convert-result {
    margin-top: 8px;
    padding: 10px;
    background: #e8f5e9;
    border-radius: 8px;
    font-weight: 600;
    min-height: 40px;
}

/* === Upcoming === */
.upcoming-list {
    max-height: 70vh;
    overflow-y: auto;
}

.upcoming-item {
    display: flex;
    align-items: center;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 8px;
    border-left: 4px solid;
}

.upcoming-item.urgent-today { background: #ffebee; border-left-color: #d32f2f; }
.upcoming-item.urgent-soon { background: #fff3e0; border-left-color: #e65100; }
.upcoming-item.urgent-week { background: #fffde7; border-left-color: #f9a825; }
.upcoming-item.urgent-later { background: #e8f5e9; border-left-color: #2e7d32; }

.upcoming-item .upcoming-days {
    font-size: 1.4rem; font-weight: 700;
    min-width: 50px; text-align: center;
}

.upcoming-item .upcoming-info { flex: 1; margin-left: 12px; }
.upcoming-item .upcoming-name { font-weight: 600; font-size: 0.9rem; }
.upcoming-item .upcoming-date { font-size: 0.8rem; color: var(--text-secondary); }

/* === Notification === */
.notification-status {
    padding: 12px; border-radius: 8px;
    margin-bottom: 12px; font-size: 0.9rem;
}

.notification-status.granted { background: #e8f5e9; color: #2e7d32; }
.notification-status.denied { background: #ffebee; color: #c62828; }
.notification-status.default { background: #fff9c4; color: #f57f17; }

.note { font-size: 0.8rem; color: var(--text-secondary); margin-top: 12px; }

/* === Toast === */
.toast {
    position: fixed;
    bottom: 24px; left: 50%;
    transform: translateX(-50%);
    background: #323232;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.85rem;
    z-index: 1000;
    transition: opacity 0.3s, transform 0.3s;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.toast.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
    pointer-events: none;
}

/* === iOS Install Banner === */
.ios-install-banner {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    z-index: 500;
    padding: 12px 16px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom));
    background: var(--surface);
    box-shadow: 0 -4px 16px rgba(0,0,0,0.15);
    border-radius: 16px 16px 0 0;
    transition: opacity 0.3s, transform 0.3s;
}

.ios-install-banner.hidden {
    opacity: 0; pointer-events: none;
    transform: translateY(100%);
}

.ios-install-content {
    display: flex; align-items: center; gap: 12px; position: relative;
}

.ios-install-close {
    position: absolute; top: -4px; right: 0;
    background: none; border: none;
    font-size: 1.2rem; color: var(--text-secondary); cursor: pointer;
}

.ios-install-icon { font-size: 2rem; flex-shrink: 0; }
.ios-install-text { flex: 1; }
.ios-install-text strong { font-size: 0.95rem; display: block; margin-bottom: 2px; }
.ios-install-text p { font-size: 0.8rem; color: var(--text-secondary); margin: 0; }

.ios-share-icon {
    display: inline-block; width: 20px; height: 20px; line-height: 20px;
    text-align: center; background: #007aff; color: white;
    border-radius: 4px; font-size: 0.7rem; vertical-align: middle;
}

/* === Utilities === */
.hidden { opacity: 0; pointer-events: none; }
hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

/* === Safari fixes === */
@supports (-webkit-touch-callout: none) {
    body { min-height: -webkit-fill-available; }
    .top-nav { position: -webkit-sticky; }
    .modal-content, .event-list-container, .upcoming-list {
        -webkit-overflow-scrolling: touch;
    }
}

/* === Responsive === */
@media (min-width: 768px) {
    #app {
        box-shadow: 0 0 20px rgba(0,0,0,0.1);
        min-height: 100vh;
    }
}