/* ═══════════════════════════════════════════════════════════════════════════
   FUNDIWANGU DESIGN TOKENS — single source of truth for the mobile app UI.
   Import in master_header.php BEFORE any other stylesheet.
   All `app-*` and TikTok-tier pages MUST consume these variables.
   Do NOT hardcode hex colors, font sizes, or radii in page-level CSS.
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
    /* ── Color: Surfaces ──────────────────────────────────────────────────── */
    --bg-0:        #050810;   /* deepest — splash, modals */
    --bg-1:        #0A0E1A;   /* page background */
    --bg-2:        #14182A;   /* card surface */
    --bg-3:        #1E2440;   /* elevated surface */
    --bg-4:        #2A3050;   /* hover/pressed surface */

    /* ── Color: Borders & Dividers ────────────────────────────────────────── */
    --border-1:    rgba(255,255,255,.06);
    --border-2:    rgba(255,255,255,.10);
    --border-3:    rgba(255,255,255,.14);

    /* ── Color: Text ──────────────────────────────────────────────────────── */
    --text-1:      #F8FAFC;   /* primary */
    --text-2:      #CBD5E1;   /* secondary */
    --text-3:      #94A3B8;   /* muted */
    --text-4:      #64748B;   /* disabled / hints */
    --text-5:      #475569;   /* footnote */

    /* ── Color: Brand & Accents ──────────────────────────────────────────── */
    --accent:      #FF7A00;   /* primary CTA */
    --accent-2:    #FF4D6D;   /* secondary CTA / gradient end */
    --accent-soft: rgba(255,122,0,.15);
    --accent-glow: rgba(255,122,0,.30);
    --gradient-1:  linear-gradient(135deg, #FF7A00 0%, #FF4D6D 100%);
    --gradient-2:  linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    --gradient-3:  linear-gradient(135deg, #10B981 0%, #06B6D4 100%);

    /* ── Color: Semantic ──────────────────────────────────────────────────── */
    --success:     #22C55E;
    --success-bg:  rgba(34,197,94,.15);
    --warning:     #F59E0B;
    --warning-bg:  rgba(245,158,11,.15);
    --danger:      #EF4444;
    --danger-bg:   rgba(239,68,68,.15);
    --info:        #3B82F6;
    --info-bg:     rgba(59,130,246,.15);

    /* ── Spacing scale (4px base) ─────────────────────────────────────────── */
    --space-0:     0;
    --space-1:     4px;
    --space-2:     8px;
    --space-3:     12px;
    --space-4:     16px;
    --space-5:     20px;
    --space-6:     24px;
    --space-8:     32px;
    --space-10:    40px;
    --space-12:    48px;
    --space-16:    64px;
    --space-20:    80px;

    /* ── Radii ────────────────────────────────────────────────────────────── */
    --radius-xs:   4px;
    --radius-sm:   8px;
    --radius-md:   12px;
    --radius-lg:   16px;
    --radius-xl:   20px;
    --radius-2xl:  28px;
    --radius-full: 9999px;

    /* ── Typography ───────────────────────────────────────────────────────── */
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, system-ui, sans-serif;
    --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

    --fs-10:  10px;
    --fs-11:  11px;
    --fs-12:  12px;
    --fs-13:  13px;
    --fs-14:  14px;
    --fs-15:  15px;
    --fs-16:  16px;   /* body */
    --fs-18:  18px;
    --fs-20:  20px;
    --fs-24:  24px;
    --fs-28:  28px;
    --fs-32:  32px;
    --fs-40:  40px;

    --fw-400: 400;
    --fw-500: 500;
    --fw-600: 600;
    --fw-700: 700;
    --fw-800: 800;
    --fw-900: 900;

    --lh-tight:  1.15;
    --lh-snug:   1.3;
    --lh-normal: 1.5;
    --lh-loose:  1.75;

    /* ── Elevation (shadows) ──────────────────────────────────────────────── */
    --shadow-1: 0 1px 2px rgba(0,0,0,.30);
    --shadow-2: 0 4px 12px rgba(0,0,0,.35);
    --shadow-3: 0 8px 24px rgba(0,0,0,.40);
    --shadow-4: 0 16px 48px rgba(0,0,0,.50);
    --shadow-glow: 0 0 32px var(--accent-glow);

    /* ── Motion ───────────────────────────────────────────────────────────── */
    --motion-instant: 80ms;
    --motion-fast:    150ms;
    --motion-base:    250ms;
    --motion-slow:    400ms;
    --motion-deliberate: 600ms;

    --ease-standard: cubic-bezier(.4, 0, .2, 1);
    --ease-decel:    cubic-bezier(0, 0, .2, 1);
    --ease-accel:    cubic-bezier(.4, 0, 1, 1);
    --ease-spring:   cubic-bezier(.34, 1.56, .64, 1);

    /* ── Z-index scale ────────────────────────────────────────────────────── */
    --z-base:     0;
    --z-raised:   10;
    --z-overlay:  100;
    --z-sticky:   500;
    --z-dropdown: 1000;
    --z-modal:    2000;
    --z-toast:    3000;
    --z-tooltip:  4000;

    /* ── Layout (mobile-first) ────────────────────────────────────────────── */
    --header-h:    56px;
    --bottom-nav-h: 64px;
    --safe-top:    env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);

    /* ── Touch targets (Material/HIG compliant) ───────────────────────────── */
    --touch-min:   44px;
    --touch-comf:  48px;

    /* ── Glassmorphism ────────────────────────────────────────────────────── */
    --glass-bg:         rgba(255, 255, 255, 0.72);
    --glass-bg-heavy:   rgba(255, 255, 255, 0.88);
    --glass-bg-subtle:  rgba(255, 255, 255, 0.45);
    --glass-border:     rgba(255, 255, 255, 0.35);
    --glass-border-dim: rgba(0, 0, 0, 0.06);
    --glass-blur:       20px;
    --glass-blur-heavy: 32px;

    /* ── Premium Elevation (layered shadows) ──────────────────────────────── */
    --shadow-nav:       0 1px 3px rgba(0,0,0,.04), 0 4px 24px rgba(0,0,0,.06);
    --shadow-nav-scroll: 0 2px 8px rgba(0,0,0,.06), 0 8px 32px rgba(0,0,0,.08);
    --shadow-dropdown:  0 8px 40px rgba(0,0,0,.10), 0 2px 8px rgba(0,0,0,.04), 0 0 0 1px rgba(0,0,0,.03);
    --shadow-float:     0 12px 48px rgba(3,105,161,.12), 0 4px 16px rgba(0,0,0,.06);
    --shadow-bottom-nav: 0 -1px 3px rgba(0,0,0,.04), 0 -4px 24px rgba(0,0,0,.05);
    --shadow-badge:     0 2px 8px rgba(239,68,68,.35);

    /* ── Premium Gradients ────────────────────────────────────────────────── */
    --gradient-nav-border: linear-gradient(90deg, transparent 0%, rgba(3,105,161,.15) 50%, transparent 100%);
    --gradient-brand-subtle: linear-gradient(135deg, rgba(3,105,161,.06) 0%, rgba(56,189,248,.06) 100%);
    --gradient-glass-shine: linear-gradient(135deg, rgba(255,255,255,.5) 0%, rgba(255,255,255,0) 60%);
    --gradient-footer-top: linear-gradient(90deg, #0369A1 0%, #38bdf8 50%, #0369A1 100%);

    /* ── Premium Motion ───────────────────────────────────────────────────── */
    --ease-bounce:   cubic-bezier(.175, .885, .32, 1.275);
    --ease-smooth:   cubic-bezier(.25, .1, .25, 1);
    --ease-snap:     cubic-bezier(0, .85, .15, 1);
    --motion-micro:  120ms;
    --motion-smooth: 300ms;
    --motion-expand: 350ms;
}

/* ── Light theme override (system preference) ──────────────────────────── */
@media (prefers-color-scheme: light) {
    :root[data-theme="auto"] {
        --bg-0:     #FFFFFF;
        --bg-1:     #F8FAFC;
        --bg-2:     #FFFFFF;
        --bg-3:     #F1F5F9;
        --bg-4:     #E2E8F0;
        --border-1: rgba(0,0,0,.06);
        --border-2: rgba(0,0,0,.10);
        --border-3: rgba(0,0,0,.14);
        --text-1:   #0F172A;
        --text-2:   #334155;
        --text-3:   #475569;
        --text-4:   #64748B;
        --text-5:   #94A3B8;
    }
}

/* ── Dark-mode glass overrides ─────────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
    :root[data-theme="auto"] {
        --glass-bg:         rgba(10, 14, 26, 0.80);
        --glass-bg-heavy:   rgba(10, 14, 26, 0.92);
        --glass-bg-subtle:  rgba(10, 14, 26, 0.55);
        --glass-border:     rgba(255, 255, 255, 0.08);
        --glass-border-dim: rgba(255, 255, 255, 0.04);
        --shadow-nav:       0 1px 3px rgba(0,0,0,.20), 0 4px 24px rgba(0,0,0,.30);
        --shadow-nav-scroll: 0 2px 8px rgba(0,0,0,.30), 0 8px 32px rgba(0,0,0,.40);
        --shadow-dropdown:  0 8px 40px rgba(0,0,0,.40), 0 2px 8px rgba(0,0,0,.20);
        --shadow-bottom-nav: 0 -1px 3px rgba(0,0,0,.20), 0 -4px 24px rgba(0,0,0,.30);
    }
}

/* ── Forced light theme (user override) ────────────────────────────────── */
:root[data-theme="light"] {
    --bg-0:     #FFFFFF;
    --bg-1:     #F8FAFC;
    --bg-2:     #FFFFFF;
    --bg-3:     #F1F5F9;
    --bg-4:     #E2E8F0;
    --border-1: rgba(0,0,0,.06);
    --border-2: rgba(0,0,0,.10);
    --border-3: rgba(0,0,0,.14);
    --text-1:   #0F172A;
    --text-2:   #334155;
    --text-3:   #475569;
    --text-4:   #64748B;
    --text-5:   #94A3B8;
}

/* ═══════════════════════════════════════════════════════════════════════════
   GLOBAL RESETS — opt-in via .fw-app on <body>.
   Do NOT apply globally — would break legacy customer pages.
   ═══════════════════════════════════════════════════════════════════════════ */

.fw-app * {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

.fw-app {
    margin: 0;
    padding: 0;
    font-family: var(--font-display);
    font-size: var(--fs-16);
    line-height: var(--lh-normal);
    color: var(--text-1);
    background: var(--bg-1);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overscroll-behavior-y: none;
    text-rendering: optimizeLegibility;
}

.fw-app img,
.fw-app video {
    display: block;
    max-width: 100%;
    height: auto;
}

.fw-app button,
.fw-app input,
.fw-app textarea,
.fw-app select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

/* ── Utility primitives (avoid one-off classes per page) ──────────────── */

.fw-stack { display: flex; flex-direction: column; gap: var(--space-3); }
.fw-row   { display: flex; flex-direction: row;    gap: var(--space-3); align-items: center; }
.fw-grow  { flex: 1 1 auto; min-width: 0; }
.fw-pad-page { padding: var(--space-4); }
.fw-pad-page-x { padding-left: var(--space-4); padding-right: var(--space-4); }

.fw-card {
    background: var(--bg-2);
    border: 1px solid var(--border-1);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
}

.fw-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: var(--touch-comf);
    padding: 0 var(--space-5);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--fs-15);
    font-weight: var(--fw-700);
    cursor: pointer;
    transition: transform var(--motion-fast) var(--ease-standard),
                background var(--motion-fast) var(--ease-standard),
                box-shadow var(--motion-fast) var(--ease-standard);
    -webkit-user-select: none;
    user-select: none;
}
.fw-btn:active { transform: scale(.97); }
.fw-btn-primary {
    background: var(--gradient-1);
    color: #fff;
    box-shadow: 0 6px 20px var(--accent-glow);
}
.fw-btn-primary:active { box-shadow: 0 2px 8px var(--accent-glow); }
.fw-btn-ghost {
    background: var(--bg-3);
    color: var(--text-1);
    border: 1px solid var(--border-2);
}
.fw-btn-text {
    background: transparent;
    color: var(--accent);
    padding: 0 var(--space-3);
}
.fw-btn-block { width: 100%; }
.fw-btn[disabled],
.fw-btn[aria-disabled="true"] {
    opacity: .5;
    pointer-events: none;
}

.fw-input {
    width: 100%;
    min-height: var(--touch-comf);
    padding: 0 var(--space-4);
    border: 1.5px solid var(--border-2);
    border-radius: var(--radius-md);
    background: var(--bg-3);
    color: var(--text-1);
    font-size: var(--fs-16);
    transition: border-color var(--motion-fast) var(--ease-standard),
                box-shadow var(--motion-fast) var(--ease-standard);
    outline: none;
}
.fw-input::placeholder { color: var(--text-4); }
.fw-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.fw-label {
    display: block;
    font-size: var(--fs-11);
    font-weight: var(--fw-700);
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-bottom: var(--space-2);
}

.fw-divider {
    height: 1px;
    background: var(--border-1);
    margin: var(--space-4) 0;
}

.fw-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-3);
    border: 1px solid var(--border-1);
    border-radius: var(--radius-full);
    font-size: var(--fs-13);
    font-weight: var(--fw-500);
    color: var(--text-2);
}
.fw-chip-active {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
}

.fw-alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--fs-14);
    font-weight: var(--fw-500);
    border: 1px solid transparent;
}
.fw-alert-success { background: var(--success-bg); color: var(--success); border-color: var(--success); }
.fw-alert-warning { background: var(--warning-bg); color: var(--warning); border-color: var(--warning); }
.fw-alert-danger  { background: var(--danger-bg);  color: var(--danger);  border-color: var(--danger);  }
.fw-alert-info    { background: var(--info-bg);    color: var(--info);    border-color: var(--info);    }

/* ── Skeleton loader (animated shimmer) ─────────────────────────────────── */
.fw-skel {
    position: relative;
    overflow: hidden;
    background: var(--bg-3);
    border-radius: var(--radius-md);
    pointer-events: none;
}
.fw-skel::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(255,255,255,.04) 50%,
        transparent 100%);
    animation: fwShimmer 1.4s infinite;
}
@keyframes fwShimmer {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}
.fw-skel-text { height: 14px; border-radius: var(--radius-xs); }
.fw-skel-line { height: 1em; border-radius: var(--radius-xs); margin-bottom: var(--space-2); }
.fw-skel-avatar { width: 40px; height: 40px; border-radius: var(--radius-full); }

/* ── Touch ripple (CSS-only, for buttons) ───────────────────────────────── */
.fw-ripple {
    position: relative;
    overflow: hidden;
    isolation: isolate;
}
.fw-ripple::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center,
        rgba(255,255,255,.18) 0%,
        transparent 60%);
    opacity: 0;
    transition: opacity var(--motion-fast);
    pointer-events: none;
}
.fw-ripple:active::after { opacity: 1; transition: none; }

/* ── Page transition (fade-up on enter) ─────────────────────────────────── */
.fw-fade-up {
    animation: fwFadeUp var(--motion-base) var(--ease-decel);
}
@keyframes fwFadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0);   }
}

/* ── Bottom nav spacer (push content above fixed nav) ───────────────────── */
.fw-page {
    min-height: calc(100vh - var(--bottom-nav-h));
    padding-bottom: calc(var(--bottom-nav-h) + var(--safe-bottom) + var(--space-4));
}

/* ── 20-phase shared social UX utilities ──────────────────────────────── */
.fw-glass-panel {
    background: var(--glass-bg-heavy);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    box-shadow: var(--shadow-dropdown);
}

.fw-bottom-sheet-shell {
    position: fixed;
    inset: auto 0 0 0;
    z-index: var(--z-modal);
    max-height: 88vh;
    overflow: auto;
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
    background: var(--bg-2);
    border-top: 1px solid var(--border-2);
    box-shadow: 0 -18px 60px rgba(0,0,0,.45);
}

.fw-mention-box {
    position: absolute;
    left: var(--space-4);
    right: var(--space-4);
    z-index: var(--z-dropdown);
    max-height: 220px;
    overflow: auto;
    border-radius: var(--radius-lg);
    background: rgba(10,14,26,.96);
    border: 1px solid var(--border-2);
    box-shadow: var(--shadow-4);
    display: none;
}
.fw-mention-box.show { display: block; }
.fw-mention-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border: 0;
    background: transparent;
    color: var(--text-1);
    text-align: left;
    cursor: pointer;
}
.fw-mention-item:hover,
.fw-mention-item:focus { background: rgba(255,255,255,.07); outline: none; }
.fw-mention-avatar {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-full);
    object-fit: cover;
    background: var(--gradient-1);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-13);
    font-weight: var(--fw-800);
    flex-shrink: 0;
}
.fw-mention-name { font-size: var(--fs-14); font-weight: var(--fw-700); }
.fw-mention-sub { font-size: var(--fs-12); color: var(--text-3); margin-top: 2px; }

.fw-why-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    max-width: 100%;
    padding: 5px 10px;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,.10);
    border: 1px solid rgba(255,255,255,.14);
    color: rgba(255,255,255,.78);
    font-size: var(--fs-11);
    font-weight: var(--fw-700);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.fw-media-fallback {
    position: absolute;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    background: linear-gradient(135deg, #141e30, #243b55);
    color: rgba(255,255,255,.82);
    text-align: center;
    font-size: var(--fs-14);
    font-weight: var(--fw-700);
}
.media-failed .fw-media-fallback { display: flex; }
.media-failed .post-media { display: none; }

/* ── Reduced motion (accessibility) ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .fw-app *,
    .fw-app *::before,
    .fw-app *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ── Scrollbar (only on desktop / WebView w/ scrollbar visible) ─────────── */
.fw-app::-webkit-scrollbar,
.fw-app *::-webkit-scrollbar { width: 6px; height: 6px; }
.fw-app::-webkit-scrollbar-track,
.fw-app *::-webkit-scrollbar-track { background: transparent; }
.fw-app::-webkit-scrollbar-thumb,
.fw-app *::-webkit-scrollbar-thumb {
    background: var(--bg-4);
    border-radius: var(--radius-full);
}
.fw-app::-webkit-scrollbar-thumb:hover,
.fw-app *::-webkit-scrollbar-thumb:hover { background: var(--text-5); }