/* ==========================================================================
   RedGrab — Xiaohongshu Downloader
   Design tokens
   ========================================================================== */
:root{
  --accent: #FF2442;
  --accent-2: #FF6B9D;
  --accent-glow: rgba(255,36,66,.35);
  --gold: #FFD166;

  --bg: #0A0A0E;
  --bg-alt: #101015;
  --surface: rgba(255,255,255,.045);
  --surface-strong: rgba(255,255,255,.07);
  --border: rgba(255,255,255,.09);
  --text: #F3F3F6;
  --text-muted: #9B9BA8;
  --text-faint: #6B6B78;

  --font-display: 'Be Vietnam Pro', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

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

  --shadow-lift: 0 20px 60px -20px rgba(0,0,0,.6);
  --ease: cubic-bezier(.16,.84,.44,1);
}

[data-theme="light"]{
  --bg: #FBF9F7;
  --bg-alt: #F3F0EC;
  --surface: rgba(20,15,15,.035);
  --surface-strong: rgba(20,15,15,.055);
  --border: rgba(20,15,15,.09);
  --text: #1B1720;
  --text-muted: #6B6472;
  --text-faint: #A29CA8;
  --shadow-lift: 0 20px 60px -24px rgba(20,10,10,.25);
}

*,*::before,*::after{ box-sizing: border-box; }
html{ color-scheme: dark; }
[data-theme="light"] html, [data-theme="light"]{ color-scheme: light; }

body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  overflow-x: hidden;
  transition: background .4s var(--ease), color .4s var(--ease);
}

.container{ max-width: 720px; margin: 0 auto; padding: 0 20px; }

.skip-link{
  position:absolute; left:-999px; top:0; background:var(--accent); color:#fff;
  padding:10px 16px; border-radius:0 0 8px 0; z-index:1000;
}
.skip-link:focus{ left:0; }

/* ==========================================================================
   Ambient background — signature element: torn-paper glow + red "ribbon" veins
   ========================================================================== */
.bg-ambient{ position:fixed; inset:0; z-index:-1; overflow:hidden; pointer-events:none; }
.bg-glow{
  position:absolute; border-radius:50%; filter: blur(90px); opacity:.35;
  animation: drift 22s ease-in-out infinite alternate;
}
.bg-glow--1{ width:520px; height:520px; background: var(--accent); top:-160px; left:-140px; }
.bg-glow--2{ width:460px; height:460px; background: var(--accent-2); bottom:-200px; right:-120px; animation-delay:-8s; }
[data-theme="light"] .bg-glow{ opacity:.18; }
.bg-grain{
  position:absolute; inset:0;
  background-image: radial-gradient(rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 3px 3px;
}
[data-theme="light"] .bg-grain{ background-image: radial-gradient(rgba(0,0,0,.02) 1px, transparent 1px); }

@keyframes drift{
  0%{ transform: translate(0,0) scale(1); }
  100%{ transform: translate(40px,30px) scale(1.08); }
}
@media (prefers-reduced-motion: reduce){
  .bg-glow{ animation: none; }
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header{ padding: 18px 0 6px; }
.header-row{ display:flex; align-items:center; justify-content:space-between; }
.brand{ display:flex; align-items:center; gap:10px; }
.brand-mark svg{ display:block; filter: drop-shadow(0 4px 14px var(--accent-glow)); }
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text strong{ font-size:1.05rem; font-weight:800; letter-spacing:-.02em; }
.brand-text em{ font-style:normal; font-size:.68rem; color:var(--text-muted); font-family:var(--font-mono); }

.header-actions{ display:flex; align-items:center; gap:10px; }

.net-status{
  display:flex; align-items:center; gap:6px; font-family:var(--font-mono);
  font-size:.7rem; color:var(--text-muted); padding:6px 10px;
  background:var(--surface); border:1px solid var(--border); border-radius:999px;
}
.net-dot{ width:7px; height:7px; border-radius:50%; background: var(--text-faint); flex:none; }
.net-dot.is-online{ background:#3ED598; box-shadow:0 0 8px #3ED59888; }
.net-dot.is-offline{ background:var(--accent); box-shadow:0 0 8px var(--accent-glow); }

.icon-btn{
  display:flex; align-items:center; justify-content:center;
  width:38px; height:38px; border-radius:50%; border:1px solid var(--border);
  background: var(--surface); color:var(--text); cursor:pointer;
  transition: transform .25s var(--ease), background .25s var(--ease);
}
.icon-btn:hover{ transform: translateY(-2px); background:var(--surface-strong); }
.icon-btn .icon-moon{ display:none; }
[data-theme="light"] .icon-btn .icon-sun{ display:none; }
[data-theme="light"] .icon-btn .icon-moon{ display:block; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{ padding: 56px 20px 28px; text-align:center; }
.eyebrow{
  font-family: var(--font-mono); font-size:.72rem; letter-spacing:.14em; text-transform:uppercase;
  color: var(--accent-2); margin: 0 0 14px;
}
.hero-title{
  font-size: clamp(1.9rem, 6vw, 2.8rem); font-weight:800; letter-spacing:-.03em;
  margin:0 0 14px; line-height:1.12;
}
.hero-title-accent{
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero-sub{ color: var(--text-muted); max-width:46ch; margin:0 auto 32px; font-size:.98rem; }

.url-form{ display:flex; flex-direction:column; gap:12px; max-width:560px; margin:0 auto; }

.url-field{
  display:flex; align-items:center; gap:8px;
  background: var(--surface); border:1.5px solid var(--border);
  border-radius: var(--radius-md); padding: 6px 8px 6px 16px;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.url-field:focus-within{ border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-glow); }
.url-field.is-dragover{ border-color: var(--accent-2); box-shadow: 0 0 0 4px var(--accent-glow); }
.url-icon{ color: var(--text-faint); flex:none; }
.url-field input{
  flex:1; min-width:0; border:none; background:transparent; outline:none;
  color:var(--text); font-family:var(--font-display); font-size:.96rem; padding:12px 0;
}
.url-field input::placeholder{ color: var(--text-faint); }

.btn-ghost-icon{
  display:flex; align-items:center; justify-content:center; flex:none;
  width:34px; height:34px; border-radius:50%; border:none; cursor:pointer;
  background: var(--surface-strong); color:var(--text-muted);
  transition: background .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
.btn-ghost-icon:hover{ background: var(--accent); color:#fff; transform: scale(1.06); }

.btn-primary{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  border:none; cursor:pointer; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color:#fff; font-family:var(--font-display); font-weight:700; font-size:.98rem;
  padding: 16px 22px; position:relative; overflow:hidden;
  box-shadow: 0 14px 30px -12px var(--accent-glow);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 18px 36px -12px var(--accent-glow); }
.btn-primary:active{ transform: translateY(0); }
.btn-primary:disabled{ opacity:.7; cursor:progress; transform:none; }
.btn-spinner{ display:none; width:16px; height:16px; border-radius:50%;
  border:2px solid rgba(255,255,255,.4); border-top-color:#fff; }
.btn-primary.is-loading .btn-label{ opacity:.55; }
.btn-primary.is-loading .btn-spinner{ display:inline-block; animation: spin .7s linear infinite; }
@keyframes spin{ to{ transform: rotate(360deg); } }

.btn-secondary{
  display:inline-flex; align-items:center; justify-content:center; gap:6px;
  border:1px solid var(--border); background: var(--surface); color:var(--text);
  border-radius: var(--radius-sm); padding: 10px 16px; font-family:var(--font-display);
  font-size:.88rem; font-weight:600; cursor:pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn-secondary:hover{ background: var(--surface-strong); border-color: var(--accent-2); transform: translateY(-1px); }

.link-btn{
  border:none; background:none; color: var(--text-muted); cursor:pointer;
  font-family: var(--font-display); font-size:.85rem; font-weight:600;
  padding: 4px 6px; transition: color .2s var(--ease);
}
.link-btn:hover{ color: var(--accent); }

.url-hint{ margin: 14px 0 0; font-size:.78rem; color: var(--text-faint); font-family: var(--font-mono); }

/* ==========================================================================
   Status row
   ========================================================================== */
.status-row{ display:flex; align-items:center; justify-content:center; gap:14px; margin: 8px 0 20px; }
.status-chip{
  font-family: var(--font-mono); font-size:.72rem; color: var(--text-muted);
  background: var(--surface); border:1px solid var(--border); border-radius:999px; padding:5px 12px;
}

/* ==========================================================================
   Fetch debug panel
   ========================================================================== */
.fetch-panel-card{ animation: rise .35s var(--ease); }
.fetch-panel-head{ display:flex; align-items:flex-start; justify-content:space-between; gap:12px; margin-bottom:6px; }
.fetch-panel-title{ font-size:.98rem; margin:0; letter-spacing:-.01em; }
.fetch-panel-actions{ display:flex; align-items:center; gap:8px; flex:none; }
.fetch-panel-url{
  font-family: var(--font-mono); font-size:.72rem; color: var(--text-faint);
  margin: 0 0 14px; word-break: break-all;
}
.fetch-panel-pre{
  margin:0; max-height: 420px; overflow:auto; background: rgba(0,0,0,.28);
  border:1px solid var(--border); border-radius: var(--radius-sm); padding:16px;
}
[data-theme="light"] .fetch-panel-pre{ background: rgba(0,0,0,.04); }
.fetch-panel-pre code{
  font-family: var(--font-mono); font-size:.78rem; line-height:1.6; color: var(--text);
  white-space: pre; tab-size: 2;
}
.fetch-panel-pre .json-key{ color: var(--accent-2); }
.fetch-panel-pre .json-string{ color: #7EE2A8; }
.fetch-panel-pre .json-number{ color: var(--gold); }
.fetch-panel-pre .json-bool{ color: #7CC3FF; }
.fetch-panel-pre .json-null{ color: var(--text-faint); }

/* ==========================================================================
   Cards (shared) — signature: notched "bookmark" corner
   ========================================================================== */
.card{
  background: var(--surface); border:1px solid var(--border); border-radius: var(--radius-lg);
  padding: 22px; margin: 0 0 40px; box-shadow: var(--shadow-lift);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  position: relative; animation: rise .5s var(--ease);
}
.card::before{
  content:''; position:absolute; top:0; right:28px; width:26px; height:34px;
  background: linear-gradient(160deg, var(--accent), var(--accent-2));
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 78%, 0 100%);
  border-radius: 0 0 4px 4px;
}
@keyframes rise{ from{ opacity:0; transform: translateY(14px); } to{ opacity:1; transform:none; } }

/* ==========================================================================
   Skeleton loading
   ========================================================================== */
.skeleton{
  background: linear-gradient(100deg, var(--surface) 30%, var(--surface-strong) 50%, var(--surface) 70%);
  background-size: 250% 100%; animation: shimmer 1.4s ease-in-out infinite; border-radius: 10px;
}
@keyframes shimmer{ 0%{ background-position: 200% 0; } 100%{ background-position:-50% 0; } }
.skeleton-media{ width:100%; aspect-ratio:9/13; border-radius: var(--radius-md); margin-bottom:16px; }
.skeleton-body{ display:flex; flex-direction:column; gap:12px; }
.skeleton-line{ height:14px; }
.skeleton-row{ display:flex; align-items:center; gap:10px; margin-top:6px; }
.skeleton-avatar{ width:38px; height:38px; border-radius:50%; flex:none; }

/* ==========================================================================
   Error card
   ========================================================================== */
.error-card{ text-align:center; }
.error-icon{
  width:48px; height:48px; border-radius:50%; margin:0 auto 14px;
  display:flex; align-items:center; justify-content:center; font-weight:800; font-size:1.3rem;
  background: var(--accent); color:#fff;
}
.error-title{ margin:0 0 8px; font-size:1.15rem; }
.error-message{ color: var(--text-muted); margin:0 0 18px; font-size:.92rem; }

/* ==========================================================================
   Result card contents
   ========================================================================== */
.post-meta{ display:flex; align-items:center; gap:12px; margin-bottom:14px; }
.post-avatar{ width:44px; height:44px; border-radius:50%; object-fit:cover; border:1px solid var(--border); }
.post-meta-text{ display:flex; flex-direction:column; }
.post-author{ margin:0; font-weight:700; font-size:.95rem; }
.post-time{ margin:0; font-size:.76rem; color:var(--text-faint); font-family: var(--font-mono); }

.post-caption{ font-size:.92rem; color: var(--text); margin: 0 0 14px; white-space: pre-line; }

.post-tags{ display:flex; flex-wrap:wrap; gap:6px; margin: 0 0 16px; }
.post-tags span{
  font-family: var(--font-mono); font-size:.72rem; color: var(--accent-2);
  background: var(--surface-strong); border-radius:999px; padding:4px 10px;
}

.media-block{ margin-bottom: 16px; }

.video-wrap{ position:relative; border-radius: var(--radius-md); overflow:hidden; background:#000; }
.video-wrap video{ width:100%; max-height:70vh; display:block; }
.res-badge{
  position:absolute; top:10px; right:10px; font-family:var(--font-mono); font-size:.7rem;
  background: rgba(0,0,0,.55); color:#fff; padding:4px 9px; border-radius:6px; backdrop-filter: blur(6px);
}

.gallery-grid{
  display:grid; grid-template-columns: repeat(3, 1fr); gap:8px; margin-bottom:16px;
}
.gallery-item{
  position:relative; aspect-ratio:1; border-radius: var(--radius-sm); overflow:hidden; cursor:zoom-in;
  background: var(--surface-strong);
}
.gallery-item img{ width:100%; height:100%; object-fit:cover; display:block; transition: transform .35s var(--ease); }
.gallery-item:hover img{ transform: scale(1.08); }
.gallery-item .gi-download{
  position:absolute; bottom:6px; right:6px; width:28px; height:28px; border-radius:50%;
  background: rgba(0,0,0,.55); color:#fff; display:flex; align-items:center; justify-content:center;
  border:none; cursor:pointer; backdrop-filter: blur(6px); opacity:0; transition: opacity .2s var(--ease);
}
.gallery-item:hover .gi-download{ opacity:1; }
.gallery-item--broken{
  display:flex; align-items:center; justify-content:center; cursor:default;
  background: var(--surface-strong);
}
.gallery-item--broken::after{
  content:'Không tải được ảnh'; font-family: var(--font-mono); font-size:.68rem;
  color: var(--text-faint); text-align:center; padding:0 10px;
}
.gallery-item--broken img{ display:none; }

.media-actions{ display:flex; flex-wrap:wrap; gap:10px; align-items:center; }
.download-progress{ font-family: var(--font-mono); font-size:.78rem; color: var(--text-muted); }

.quality-label{
  font-family: var(--font-mono); font-size:.74rem; color: var(--text-faint);
  text-transform: uppercase; letter-spacing:.08em; margin: 0 0 10px;
}
.quality-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:8px; }
.quality-item{
  display:flex; align-items:center; gap:12px; padding:12px 14px;
  background: var(--surface); border:1px solid var(--border); border-radius: var(--radius-sm);
}
.quality-icon{ font-size:1.2rem; flex:none; }
.quality-info{ flex:1; min-width:0; display:flex; flex-direction:column; gap:2px; }
.quality-name{ font-weight:600; font-size:.9rem; }
.quality-type{
  font-family: var(--font-mono); font-size:.7rem; color: var(--text-faint);
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
}
.quality-dl{ flex:none; }

.stats-row{
  display:flex; flex-wrap:wrap; gap:16px; padding-top:14px; margin-top:6px;
  border-top:1px dashed var(--border); font-family: var(--font-mono); font-size:.82rem; color: var(--text-muted);
}
.stats-row .stat b{ color: var(--text); font-weight:600; }
.stat-id{ margin-left:auto; color: var(--text-faint); }

/* ==========================================================================
   Lightbox
   ========================================================================== */
.lightbox{
  position:fixed; inset:0; background: rgba(5,5,8,.92); backdrop-filter: blur(6px);
  display:flex; align-items:center; justify-content:center; z-index:200; animation: fadeIn .25s var(--ease);
}
.lightbox[hidden]{ display:none; }

/* Global safety net: [hidden] must always win over any component's own
   display:flex/grid rule (status-row, post-meta, stats-row, btn-ghost-icon...) */
[hidden]{ display:none !important; }
@keyframes fadeIn{ from{ opacity:0; } to{ opacity:1; } }
.lightbox-img{ max-width:88vw; max-height:76vh; border-radius:12px; box-shadow: var(--shadow-lift); }
.lightbox-close{
  position:absolute; top:20px; right:20px; width:42px; height:42px; border-radius:50%;
  background: var(--surface-strong); border:1px solid var(--border); color:#fff; font-size:1.1rem; cursor:pointer;
}
.lightbox-nav{
  position:absolute; top:50%; transform: translateY(-50%); width:48px; height:48px; border-radius:50%;
  background: var(--surface-strong); border:1px solid var(--border); color:#fff; font-size:1.6rem; cursor:pointer;
}
.lightbox-prev{ left:16px; } .lightbox-next{ right:16px; }
.lightbox-actions{ position:absolute; bottom:22px; display:flex; align-items:center; gap:14px; }
.lightbox-counter{ font-family: var(--font-mono); color:#fff; font-size:.85rem; }

/* ==========================================================================
   History
   ========================================================================== */
.history-section{ margin-top: 8px; margin-bottom: 60px; }
.history-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:14px; }
.history-title{ font-size:1rem; margin:0; letter-spacing:-.01em; }
.history-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:8px; }
.history-empty{ color: var(--text-faint); font-size:.85rem; padding:14px 0; text-align:center; }
.history-item{
  display:flex; align-items:center; gap:10px; padding:12px 14px;
  background: var(--surface); border:1px solid var(--border); border-radius: var(--radius-sm);
  animation: rise .4s var(--ease);
}
.history-link{
  flex:1; min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
  font-family: var(--font-mono); font-size:.78rem; color: var(--text-muted);
}
.history-item button{
  flex:none; border:none; background:none; cursor:pointer; color: var(--text-faint);
  width:28px; height:28px; border-radius:50%; display:flex; align-items:center; justify-content:center;
}
.history-item button:hover{ color: var(--accent); background: var(--surface-strong); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer{ padding: 30px 0 50px; text-align:center; }
.footer-row p{ margin:4px 0; font-size:.78rem; color: var(--text-faint); }
.footer-credit{ font-family: var(--font-mono); }

/* ==========================================================================
   Toasts
   ========================================================================== */
.toast-stack{
  position:fixed; bottom:20px; left:50%; transform: translateX(-50%);
  display:flex; flex-direction:column; gap:10px; z-index:300; width: min(92vw, 380px);
}
.toast{
  display:flex; align-items:center; gap:10px; padding:13px 16px; border-radius: var(--radius-sm);
  background: var(--bg-alt); border:1px solid var(--border); box-shadow: var(--shadow-lift);
  font-size:.86rem; animation: toastIn .3s var(--ease);
}
.toast.toast-success{ border-color: #3ED59866; }
.toast.toast-error{ border-color: var(--accent); }
.toast.toast-out{ animation: toastOut .25s var(--ease) forwards; }
@keyframes toastIn{ from{ opacity:0; transform: translateY(14px) scale(.96); } to{ opacity:1; transform:none; } }
@keyframes toastOut{ to{ opacity:0; transform: translateY(8px) scale(.96); } }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (min-width: 640px){
  .url-form{ flex-direction:row; }
  .btn-primary{ flex:none; }
  .gallery-grid{ grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 480px){
  .hero{ padding: 40px 16px 20px; }
  .gallery-grid{ grid-template-columns: repeat(3, 1fr); gap:6px; }
  .media-actions{ flex-direction:column; align-items:stretch; }
  .media-actions .btn-secondary, .media-actions .btn-primary{ width:100%; }
}

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible{
  outline: 2px solid var(--accent-2); outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}