/* ═══════════════════════════════════════════
   Calendar App — Apple-Style Premium CSS
   Mobile-first, Dark Mode, Thai Typography
   ═══════════════════════════════════════════ */

/* ── CSS Custom Properties ──────────────── */
:root {
    /* Light mode */
    --bg: #FFFFFF;
    --bg-secondary: #F5F5F7;
    --bg-card: #FFFFFF;
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --text-tertiary: #AEAEB2;
    --accent: #0071E3;
    --accent-hover: #0077ED;
    --moon-gold: #C4A35A;
    --wan-phra: #FF9500;
    --good: #34C759;
    --bad: #FF3B30;
    --moderate: #FF9500;
    --divider: #D2D2D7;
    --shadow: rgba(0, 0, 0, 0.04);
    --shadow-md: rgba(0, 0, 0, 0.08);
    --card-radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 8px;
    --nav-height: 56px;
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'Noto Sans Thai', 'Sarabun', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #000000;
        --bg-secondary: #1C1C1E;
        --bg-card: #1C1C1E;
        --text-primary: #F5F5F7;
        --text-secondary: #98989D;
        --text-tertiary: #636366;
        --accent: #0A84FF;
        --accent-hover: #409CFF;
        --moon-gold: #D4AF37;
        --wan-phra: #FF9F0A;
        --good: #30D158;
        --bad: #FF453A;
        --moderate: #FF9F0A;
        --divider: #38383A;
        --shadow: rgba(0, 0, 0, 0.3);
        --shadow-md: rgba(0, 0, 0, 0.5);
    }
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    padding-bottom: calc(var(--nav-height) + var(--safe-bottom) + 16px);
    overflow-x: hidden;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover { color: var(--accent-hover); }

img, svg { max-width: 100%; height: auto; }

/* ── Typography ─────────────────────────── */
.h1, h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; }
.h2, h2 { font-size: 1.5rem; font-weight: 600; letter-spacing: -0.01em; }
.h3, h3 { font-size: 1.17rem; font-weight: 600; }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-gold { color: var(--moon-gold); }
.text-accent { color: var(--accent); }
.text-good { color: var(--good); }
.text-bad { color: var(--bad); }
.text-center { text-align: center; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.font-mono { font-family: var(--font-mono); }

/* ── Layout ─────────────────────────────── */
.container {
    max-width: 680px;
    margin: 0 auto;
    padding: 0 20px;
}

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

/* ── Header ─────────────────────────────── */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid var(--divider);
    padding: 12px 20px;
}

@supports (backdrop-filter: blur(20px)) {
    .header {
        background: color-mix(in srgb, var(--bg) 72%, transparent);
    }
}

.header-inner {
    max-width: 680px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.header-date {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ── Cards ──────────────────────────────── */
.card {
    background: var(--bg-card);
    border-radius: var(--card-radius);
    box-shadow: 0 2px 12px var(--shadow);
    overflow: hidden;
    margin-bottom: 16px;
    border: 0.5px solid var(--divider);
}

.card-header {
    padding: 16px 20px 8px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.card-body {
    padding: 12px 20px 20px;
}

.card-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 0.5px solid var(--divider);
}

.card-row:last-child {
    border-bottom: none;
}

.card-row-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.card-row-value {
    font-weight: 500;
    text-align: right;
}

/* ── Moon Phase Visual ──────────────────── */
.moon-visual {
    text-align: center;
    padding: 32px 20px;
}

.moon-svg-container {
    width: 160px;
    height: 160px;
    margin: 0 auto 20px;
}

.moon-phase-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--moon-gold);
    margin-bottom: 4px;
}

.moon-illumination {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ── Badge ──────────────────────────────── */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-good {
    background: color-mix(in srgb, var(--good) 15%, transparent);
    color: var(--good);
}

.badge-bad {
    background: color-mix(in srgb, var(--bad) 15%, transparent);
    color: var(--bad);
}

.badge-moderate {
    background: color-mix(in srgb, var(--moderate) 15%, transparent);
    color: var(--moderate);
}

.badge-accent {
    background: color-mix(in srgb, var(--accent) 15%, transparent);
    color: var(--accent);
}

.badge-wan-phra {
    background: color-mix(in srgb, var(--wan-phra) 15%, transparent);
    color: var(--wan-phra);
}

/* ── Color Dot ──────────────────────────── */
.color-dot {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    vertical-align: middle;
    margin-right: 6px;
    border: 1px solid var(--divider);
}

/* ── Calendar Grid ──────────────────────── */
.calendar-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.calendar-nav-btn {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--bg-secondary);
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.calendar-nav-btn:hover {
    background: var(--divider);
}

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

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

.calendar-day-header {
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 0;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xs);
    cursor: pointer;
    transition: background 0.15s;
    padding: 4px 2px;
    position: relative;
    min-height: 56px;
}

.calendar-day:hover {
    background: var(--bg-secondary);
}

.calendar-day.today {
    background: var(--accent);
    color: #fff;
}

.calendar-day.today .calendar-day-lunar,
.calendar-day.today .calendar-day-num {
    color: #fff;
}

.calendar-day-num {
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.2;
}

.calendar-day-lunar {
    font-size: 0.6rem;
    color: var(--text-tertiary);
    line-height: 1.1;
}

.calendar-day-moon {
    font-size: 0.55rem;
    line-height: 1;
}

.calendar-day .wan-phra-dot {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--wan-phra);
}

.calendar-day .riang-mon-heart {
    position: absolute;
    top: 3px;
    left: 4px;
    font-size: 0.55rem;
    line-height: 1;
    color: #FF2D55;
    opacity: 0.85;
}

.calendar-day.today .riang-mon-heart {
    color: #fff;
    opacity: 0.9;
}

.calendar-day.empty {
    cursor: default;
}

.calendar-day.empty:hover {
    background: transparent;
}

/* ── Bottom Navigation ──────────────────── */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
    height: calc(var(--nav-height) + var(--safe-bottom));
    padding-bottom: var(--safe-bottom);
    background: var(--bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-top: 0.5px solid var(--divider);
    display: flex;
    align-items: stretch;
}

@supports (backdrop-filter: blur(20px)) {
    .bottom-nav {
        background: color-mix(in srgb, var(--bg) 72%, transparent);
    }
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.65rem;
    font-weight: 500;
    gap: 2px;
    transition: color 0.15s;
    -webkit-tap-highlight-color: transparent;
}

.nav-item.active {
    color: var(--accent);
}

.nav-icon {
    font-size: 1.4rem;
    line-height: 1;
}

/* ── Section Header ─────────────────────── */
.section-header {
    padding: 24px 0 8px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

/* ── Converter Form ─────────────────────── */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    font-family: var(--font);
    background: var(--bg-secondary);
    border: 1.5px solid var(--divider);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-block {
    width: 100%;
}

/* ── Skeleton Loading ───────────────────── */
.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--divider) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-xs);
}

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

.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
}

.skeleton-circle {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    margin: 0 auto;
}

/* ── Slide-up Panel ─────────────────────── */
.panel-overlay {
    position: fixed;
    inset: 0;
    z-index: 300;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.panel-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 301;
    background: var(--bg);
    border-radius: 20px 20px 0 0;
    max-height: 80vh;
    overflow-y: auto;
    transform: translateY(100%);
    transition: transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
    padding-bottom: var(--safe-bottom);
}

.panel.active {
    transform: translateY(0);
}

.panel-handle {
    width: 36px;
    height: 5px;
    background: var(--divider);
    border-radius: 3px;
    margin: 8px auto 0;
}

.panel-content {
    padding: 16px 20px 24px;
}

/* ── Docs Sidebar ───────────────────────── */
@media (min-width: 768px) {
    .docs-layout {
        display: grid;
        grid-template-columns: 240px 1fr;
        gap: 32px;
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }
}

.docs-sidebar {
    position: sticky;
    top: 68px;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    padding: 16px 0;
}

@media (max-width: 767px) {
    .docs-sidebar {
        display: none;
    }
}

.docs-nav-group {
    margin-bottom: 24px;
}

.docs-nav-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    margin-bottom: 8px;
}

.docs-nav-link {
    display: block;
    padding: 6px 12px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-radius: var(--radius-xs);
    transition: all 0.15s;
}

.docs-nav-link:hover,
.docs-nav-link.active {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.docs-content {
    min-width: 0;
}

/* Code blocks */
.code-block {
    background: var(--bg-secondary);
    border: 1px solid var(--divider);
    border-radius: var(--radius-sm);
    padding: 16px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.6;
    margin: 12px 0;
}

.code-inline {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Endpoint card */
.endpoint-card {
    background: var(--bg-card);
    border: 1px solid var(--divider);
    border-radius: var(--card-radius);
    margin-bottom: 16px;
    overflow: hidden;
}

.endpoint-header {
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: background 0.15s;
}

.endpoint-header:hover {
    background: var(--bg-secondary);
}

.method-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    background: color-mix(in srgb, var(--good) 15%, transparent);
    color: var(--good);
    flex-shrink: 0;
}

.endpoint-path {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-primary);
}

.endpoint-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-left: auto;
}

.endpoint-body {
    padding: 0 16px 16px;
    display: none;
}

.endpoint-body.active {
    display: block;
}

.try-btn {
    padding: 8px 16px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-xs);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
}

.try-btn:hover {
    background: var(--accent-hover);
}

.response-preview {
    margin-top: 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 16px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.5;
    overflow-x: auto;
    white-space: pre-wrap;
    max-height: 400px;
    overflow-y: auto;
}

/* ── Responsive ─────────────────────────── */
@media (min-width: 768px) {
    .container { padding: 0 32px; }
    .moon-svg-container { width: 200px; height: 200px; }
    .calendar-day { min-height: 72px; }
    .calendar-day-num { font-size: 1.1rem; }
    .calendar-day-lunar { font-size: 0.7rem; }
}

@media (min-width: 1024px) {
    body { padding-bottom: 0; }
    .bottom-nav { display: none; }
    .desktop-nav { display: flex !important; }
}

/* Desktop top nav (hidden on mobile) */
.desktop-nav {
    display: none;
    gap: 24px;
}

.desktop-nav a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 8px 0;
    transition: color 0.15s;
}

.desktop-nav a:hover,
.desktop-nav a.active {
    color: var(--text-primary);
}

/* ── Utilities ──────────────────────────── */
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.hidden { display: none !important; }

/* ── Page Load Animation ────────────────── */
.fade-in {
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}