/* ============================================================
 * Wie Lotto v2 — Design Tokens + Theme Support
 * Mobile-first | Light/Dark mode (CSS variables)
 * ============================================================ */

/* Fonts (Kanit + JetBrains Mono) — loaded via <link> in head.php for parallel download
   (was @import here, but @import is render-blocking + serial). */

/* ───── Theme: Dark (default) ───── */
:root,
[data-theme="dark"] {
    --bg-primary:     #0a0a1a;
    --bg-secondary:   #12122a;
    --bg-elevated:    rgba(255, 255, 255, 0.03);
    --bg-elevated-hover: rgba(255, 255, 255, 0.06);

    --border:         rgba(255, 255, 255, 0.08);
    --border-strong:  rgba(255, 255, 255, 0.15);

    --text-primary:   #e5e7eb;
    --text-secondary: #9ca3af;
    --text-muted:     #6b7280;
    --text-inverse:   #0a0a1a;

    --accent-purple:  #8b5cf6;
    --accent-indigo:  #6366f1;
    --accent-cyan:    #06b6d4;
    --accent-light:   #a78bfa;

    --success:        #10b981;
    --warning:        #f59e0b;
    --danger:         #ef4444;
    --info:           #06b6d4;

    --gradient-brand: linear-gradient(135deg, #8b5cf6 0%, #6366f1 50%, #06b6d4 100%);
    --gradient-text:  linear-gradient(135deg, #a78bfa 0%, #818cf8 50%, #22d3ee 100%);
    --gradient-bg:    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(139,92,246,.15), transparent),
                      radial-gradient(ellipse 60% 50% at 80% 30%, rgba(6,182,212,.12), transparent);

    --shadow-sm:      0 1px 2px rgba(0,0,0,0.4);
    --shadow-md:      0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg:      0 20px 50px -10px rgba(139,92,246,0.3);
}

/* ───── Theme: Light (softened — bg slate, cards white-ish) ───── */
[data-theme="light"] {
    /* Soft warm-cool blend page bg (slate-50 mix) — ไม่ขาวจั๊วะ */
    --bg-primary:     #f1f5f9;   /* slate-100 — page background */
    --bg-secondary:   #ffffff;   /* card surface — pop ขึ้นจาก bg */
    --bg-elevated:    #ffffff;   /* glass cards */
    --bg-elevated-hover: #f8fafc; /* slate-50 */

    --border:         #e2e8f0;   /* slate-200 — soft */
    --border-strong:  #cbd5e1;   /* slate-300 */

    --text-primary:   #0f172a;   /* slate-900 — high contrast */
    --text-secondary: #475569;   /* slate-600 */
    --text-muted:     #64748b;   /* slate-500 — ยังอ่านได้บน bg-primary */
    --text-inverse:   #ffffff;

    --accent-purple:  #7c3aed;
    --accent-indigo:  #4f46e5;
    --accent-cyan:    #0891b2;
    --accent-light:   #6366f1;

    --success:        #059669;
    --warning:        #d97706;
    --danger:         #dc2626;
    --info:           #0284c7;

    --gradient-brand: linear-gradient(135deg, #7c3aed 0%, #4f46e5 50%, #0891b2 100%);
    --gradient-text:  linear-gradient(135deg, #7c3aed 0%, #4f46e5 50%, #0891b2 100%);
    /* Light theme gradient bg — มองเห็นได้ชัดขึ้น (alpha ~0.12) */
    --gradient-bg:    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(124,58,237,.12), transparent),
                      radial-gradient(ellipse 60% 50% at 80% 30%, rgba(8,145,178,.10), transparent),
                      radial-gradient(ellipse 50% 40% at 50% 80%, rgba(99,102,241,.08), transparent);

    --shadow-sm:      0 1px 2px rgba(15,23,42,0.04);
    --shadow-md:      0 4px 12px rgba(15,23,42,0.06);
    --shadow-lg:      0 20px 50px -10px rgba(124,58,237,0.15);
}

/* Light theme header — ลบ dark blur ที่ติดมา ใช้สี slate แทน */
[data-theme="light"] header[role="banner"] {
    background: rgba(255,255,255,0.85) !important;
}

/* Light theme glass — ใส่ shadow เบาๆ ให้ card ลอยขึ้นมาจาก bg slate */
[data-theme="light"] .glass {
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .glass:hover {
    box-shadow: var(--shadow-md);
}

/* ───── Base ───── */
* {
    -webkit-font-smoothing: antialiased;
    box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: 'Kanit', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    transition: background-color 0.3s, color 0.3s;
}

.font-mono { font-family: 'JetBrains Mono', 'Kanit', monospace; }

/* ───── Utility classes ───── */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* Screen-reader-only utility (visible to assistive tech, hidden visually) */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.glass {
    background: var(--bg-elevated);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass:hover {
    background: var(--bg-elevated-hover);
    border-color: var(--accent-purple);
}

.btn-gradient {
    background: var(--gradient-brand);
    color: white;
    background-size: 200% 200%;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px -5px rgba(139, 92, 246, 0.5);
    border: none;
    cursor: pointer;
}
.btn-gradient:hover {
    background-position: 100% 100%;
    transform: translateY(-1px);
    box-shadow: 0 15px 40px -5px rgba(139, 92, 246, 0.7);
}

/* ───── Scrollbar ───── */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb {
    background: var(--gradient-brand);
    border-radius: 5px;
}

/* ───── Mobile sidebar (off-canvas) ───── */
.sidebar-mobile {
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    width: 280px;
    max-width: 85vw;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 60;
    overflow-y: auto;
}
.sidebar-mobile.open { transform: translateX(0); }

.sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 55;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}
.sidebar-backdrop.open {
    opacity: 1;
    pointer-events: auto;
}

/* ───── Bottom nav (mobile only) ───── */
.bottom-nav {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    backdrop-filter: blur(20px);
    z-index: 40;
    padding: 0.5rem 0 max(0.5rem, env(safe-area-inset-bottom));
}
.bottom-nav-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    max-width: 600px;
    margin: 0 auto;
}
.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.7rem;
    min-height: 44px;
    transition: color 0.2s;
}
.bottom-nav-item.active {
    color: var(--accent-purple);
}
.bottom-nav-item:hover {
    color: var(--text-primary);
}
.bottom-nav-item i {
    font-size: 1.25rem;
}

/* hide bottom nav on desktop */
@media (min-width: 1024px) {
    .bottom-nav { display: none; }
}

/* ───── Touch target sizing (mobile-first) ───── */
/* Only apply min-height to interactive elements that are buttons or styled CTAs,
   NOT to inline text links — otherwise they break vertical alignment in nav bars */
button:not(.theme-toggle), .clickable {
    min-height: 44px;  /* Apple HIG minimum */
}
.theme-toggle { min-height: 40px; }

/* ───── Theme-aware nav link (replace hover:text-white which breaks on light bg) ───── */
.nav-link {
    color: var(--text-secondary);
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}
.nav-link:hover,
.nav-link:focus-visible {
    color: var(--accent-purple);
}
.nav-link.active {
    color: var(--accent-purple);
    font-weight: 600;
    position: relative;
}
/* Underline indicator (anchored to header bottom edge — 60px header height) */
.nav-link.active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;  /* sit on header border-bottom */
    height: 2px;
    background: var(--accent-purple);
    border-radius: 2px 2px 0 0;
}

/* Dropdown menu item — theme-aware (replace hover:bg-purple-500/10 patterns that work but text color may break) */
.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: background 0.15s;
}
.dropdown-item:hover {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-purple);
}

/* Preference card — radio button styled as selectable card (Profile lang/theme picker) */
.pref-card {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 0.875rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
    font-size: 0.875rem;
    user-select: none;
}
.pref-card:hover {
    border-color: var(--accent-purple);
    background: rgba(139, 92, 246, 0.05);
}
.pref-card.is-active {
    border-color: var(--accent-purple);
    background: rgba(139, 92, 246, 0.12);
    color: var(--text-primary);
    box-shadow: 0 0 0 1px var(--accent-purple);
}

/* ───── Container helpers ───── */
.container-narrow { max-width: 768px;  margin: 0 auto; padding: 0 1rem; }
.container        { max-width: 1280px; margin: 0 auto; padding: 0 1rem; }

@media (min-width: 640px) {
    .container, .container-narrow { padding: 0 1.5rem; }
}

/* ───── Page padding bottom on mobile (for bottom nav) ───── */
@media (max-width: 1023px) {
    body { padding-bottom: 70px; }
}

/* ───── Animation utilities ───── */
.fade-in {
    animation: fadeIn 0.4s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.pulse-dot { animation: pulseGlow 2s ease-in-out infinite; }
@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.6); }
    50%      { box-shadow: 0 0 0 8px rgba(34, 211, 238, 0); }
}

/* ───── Theme toggle button ───── */
.theme-toggle {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: 999px;
    width: 40px; height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}
.theme-toggle:hover {
    border-color: var(--accent-purple);
    transform: scale(1.05);
}

/* ───── Form elements (light/dark friendly) ───── */
input, select, textarea {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: inherit;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

/* Native <select> options — fix dark-mode white-on-white invisibility */
select option {
    background: #1a1a35;
    color: #e5e7eb;
}
[data-theme="light"] select option {
    background: #ffffff;
    color: #18181b;
}
select option:checked,
select option:hover {
    background: #6366f1;
    color: white;
}

/* ───── SweetAlert2 ───── */
.swal2-popup {
    background: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
}

/* ============================================================
 *  Flatpickr — fully theme-aware skin (uses design tokens)
 *  Replaces the bundled dark theme so light + dark both look right
 * ============================================================ */

/* Popup container */
.flatpickr-calendar {
    background: var(--bg-secondary) !important;
    border: 1px solid var(--border) !important;
    border-radius: 12px !important;
    box-shadow: var(--shadow-lg) !important;
    color: var(--text-primary) !important;
    font-family: 'Kanit', sans-serif !important;
}
.flatpickr-calendar.arrowTop::before,
.flatpickr-calendar.arrowBottom::before {
    border-bottom-color: var(--border);
    border-top-color: var(--border);
}
.flatpickr-calendar.arrowTop::after,
.flatpickr-calendar.arrowBottom::after {
    border-bottom-color: var(--bg-secondary);
    border-top-color: var(--bg-secondary);
}

/* Month/year header */
.flatpickr-months {
    background: transparent;
    padding: 0.5rem 0;
}
.flatpickr-months .flatpickr-month {
    background: transparent;
    color: var(--text-primary);
    height: 36px;
}
.flatpickr-current-month {
    color: var(--text-primary);
    font-size: 1rem;
    padding: 4px 0 0 0;
}
.flatpickr-current-month .flatpickr-monthDropdown-months,
.flatpickr-current-month input.cur-year {
    color: var(--text-primary) !important;
    background: transparent !important;
    font-weight: 600 !important;
    font-family: inherit !important;
}
.flatpickr-current-month .flatpickr-monthDropdown-months:hover {
    background: var(--bg-elevated-hover) !important;
}
.flatpickr-monthDropdown-months .flatpickr-monthDropdown-month {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Year up/down spinner arrows */
.flatpickr-current-month .numInputWrapper span.arrowUp::after { border-bottom-color: var(--text-muted); }
.flatpickr-current-month .numInputWrapper span.arrowDown::after { border-top-color: var(--text-muted); }
.flatpickr-current-month .numInputWrapper:hover { background: var(--bg-elevated-hover); }

/* Prev/Next month arrows */
.flatpickr-months .flatpickr-prev-month,
.flatpickr-months .flatpickr-next-month {
    color: var(--text-secondary);
    fill: var(--text-secondary);
    padding: 8px 12px;
    height: 36px;
}
.flatpickr-months .flatpickr-prev-month:hover,
.flatpickr-months .flatpickr-next-month:hover {
    color: var(--accent-purple);
}
.flatpickr-months .flatpickr-prev-month svg,
.flatpickr-months .flatpickr-next-month svg {
    fill: currentColor;
}

/* Weekday labels (Sun/Mon/...) */
.flatpickr-weekdays {
    background: transparent;
}
.flatpickr-weekdaycontainer {
    background: transparent;
}
span.flatpickr-weekday {
    color: var(--text-secondary) !important;
    background: transparent !important;
    font-weight: 600 !important;
    font-size: 0.75rem !important;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

/* Day cells — เพิ่ม specificity (.flatpickr-calendar prefix) เพื่อ override base */
.flatpickr-calendar .flatpickr-days,
.flatpickr-calendar .dayContainer {
    background: transparent !important;
}
.flatpickr-calendar .flatpickr-day {
    color: var(--text-primary) !important;
    border-radius: 8px;
    border: 1px solid transparent;
    background: transparent;
    transition: background 0.15s, color 0.15s, transform 0.1s;
    min-height: auto !important;  /* override our global a/button min-height */
    font-weight: 500;
}
.flatpickr-calendar .flatpickr-day:hover,
.flatpickr-calendar .flatpickr-day:focus {
    background: var(--bg-elevated-hover) !important;
    border-color: var(--border);
    color: var(--text-primary) !important;
}

/* Days of prev/next month — muted (override base flatpickr color) */
.flatpickr-calendar .flatpickr-day.prevMonthDay,
.flatpickr-calendar .flatpickr-day.nextMonthDay {
    color: var(--text-muted) !important;
    opacity: 0.6;
    background: transparent;
}
.flatpickr-calendar .flatpickr-day.prevMonthDay:hover,
.flatpickr-calendar .flatpickr-day.nextMonthDay:hover {
    color: var(--text-secondary) !important;
    opacity: 1;
}

/* Today */
.flatpickr-day.today {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    font-weight: 600;
    background: transparent;
}
.flatpickr-day.today:hover {
    background: rgba(6, 182, 212, 0.12);
    color: var(--accent-cyan);
}

/* Selected day — brand gradient */
.flatpickr-day.selected,
.flatpickr-day.selected:hover,
.flatpickr-day.selected.today,
.flatpickr-day.startRange,
.flatpickr-day.endRange,
.flatpickr-day.startRange:hover,
.flatpickr-day.endRange:hover {
    background: var(--gradient-brand) !important;
    border-color: transparent !important;
    color: white !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 12px -2px rgba(139, 92, 246, 0.4) !important;
}

/* Range (between start–end) */
.flatpickr-day.inRange {
    background: rgba(139, 92, 246, 0.15);
    border-color: transparent;
    color: var(--text-primary);
    box-shadow: none;
}

/* Disabled days */
.flatpickr-day.flatpickr-disabled,
.flatpickr-day.flatpickr-disabled:hover {
    color: var(--text-muted);
    opacity: 0.3;
    background: transparent;
    cursor: not-allowed;
}

/* Numerical week numbers (if enabled) */
.flatpickr-weeks {
    background: transparent;
    border-right: 1px solid var(--border);
}
.flatpickr-day.week.selected {
    box-shadow: -5px 0 0 var(--accent-purple), 5px 0 0 var(--accent-purple);
}

/* Time picker (if enabled) */
.flatpickr-time {
    border-top: 1px solid var(--border) !important;
    background: transparent;
}
.flatpickr-time input,
.flatpickr-time .flatpickr-am-pm {
    color: var(--text-primary) !important;
    background: transparent !important;
}
.flatpickr-time .flatpickr-time-separator,
.flatpickr-time .flatpickr-am-pm:hover {
    color: var(--text-primary) !important;
}

/* Input itself when active — focus ring matches brand */
.flatpickr-input.active,
input.flatpickr-date.active {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

/* ============================================================
 *  Info Panel — collapsible "how to read this page" component
 *  Used on complex stats/random pages
 * ============================================================ */
.info-panel {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.info-panel:hover {
    border-color: var(--accent-purple);
}
.info-panel-header {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.06), rgba(34, 211, 238, 0.06));
    border: none;
    cursor: pointer;
    text-align: left;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    min-height: auto;
    transition: background 0.2s;
}
.info-panel-header:hover {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.18), rgba(34, 211, 238, 0.18));
}
.info-panel-hint {
    font-size: 0.75rem;
    color: var(--accent-purple);
    font-weight: 500;
    margin-right: 0.5rem;
    white-space: nowrap;
}
.info-panel-icon {
    position: relative;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: rgba(139, 92, 246, 0.15);
    color: var(--accent-purple);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.info-panel-pulse {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 10px;
    height: 10px;
    background: var(--accent-cyan);
    border-radius: 50%;
    border: 2px solid var(--bg-elevated);
    animation: pulseGlow 2s ease-in-out infinite;
}
.info-panel-title {
    flex: 1;
    font-weight: 600;
    color: var(--text-primary);
}
.info-panel-chevron {
    color: var(--accent-purple);
    transition: transform 0.3s ease;
    font-size: 0.9rem;
}
.info-panel.is-open .info-panel-chevron { transform: rotate(180deg); }
.info-panel-body {
    padding: 0 1rem 1rem 1rem;
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    color: var(--text-secondary);
    line-height: 1.75;
    font-size: 0.9rem;
}
.info-panel-body p { margin: 0 0 0.75rem 0; }
.info-panel-body p:last-child { margin-bottom: 0; }
.info-panel-body strong { color: var(--text-primary); font-weight: 600; }
.info-panel-body code {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-light);
    padding: 0.1em 0.4em;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
}
.info-panel-body ul { padding-left: 1.25rem; margin: 0 0 0.75rem 0; list-style-type: disc; }
.info-panel-body ol { padding-left: 1.5rem; margin: 0 0 0.75rem 0; list-style-type: decimal; }
.info-panel-body li { margin-bottom: 0.4rem; }
.info-panel-body li::marker { color: var(--accent-purple); }
.info-panel-body .info-section-title {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin: 1rem 0 0.5rem 0;
    font-size: 0.95rem;
}
.info-panel-body .info-section-title:first-child { margin-top: 0; }
[x-cloak] { display: none !important; }

/* ───── Replay random tile match highlight ───── */
.replay-tile-normal {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-primary);
}
.replay-tile-match {
    background: rgba(16, 185, 129, 0.2);
    border: 2px solid var(--success);
    color: var(--success);
}
.replay-badge-normal {
    background: var(--bg-elevated);
    color: var(--text-muted);
}
.replay-badge-good {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

/* ── Number-match highlight (search results) ─────────────────────────
   ใช้กับ <mark class="num-hit"> ครอบเลขที่ตรงกับคำค้นหา
   - bg solid + text ขาว → คอนทราสต์สูงทั้ง dark+light theme
   - inline padding เล็ก ๆ + radius ให้ดูเป็น "marker pen"
   - reset default <mark> styling ของเบราว์เซอร์ (สีเหลือง) */
.num-hit {
    background: var(--accent-purple);
    color: #ffffff;
    padding: 1px 5px;
    margin: 0 1px;
    border-radius: 5px;
    font-weight: 700;
    /* ถ้า match พาดข้ามบรรทัด background ยังต่อเนื่อง */
    -webkit-box-decoration-break: clone;
    box-decoration-break: clone;
    /* SafariFix: <mark> default text color คือ black */
    text-shadow: 0 1px 1px rgba(0,0,0,0.15);
}