/* ===========================================================
   VisionLingo — design tokens
   ink #0A0F14 · panel #121A24 · cyan #4FD8E8 · amber #FFB454
   mist #93A5B8 · paper #F4F7FA
   Display: Sora · Body: Inter · Utility/data: JetBrains Mono
=========================================================== */

:root{
  --ink: #0A0F14;
  --ink-soft: #0E141C;
  --panel: #121A24;
  --panel-2: #182231;
  --line: rgba(147,165,184,0.16);
  --cyan: #4FD8E8;
  --cyan-dim: rgba(79,216,232,0.16);
  --amber: #FFB454;
  --amber-dim: rgba(255,180,84,0.16);
  --mist: #93A5B8;
  --paper: #F4F7FA;
  --danger: #FF6B6B;

  --font-display: 'Sora', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

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

*{ box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html,body{ height:100%; }
body{
  margin:0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overscroll-behavior: none;
}
button{ font-family: inherit; cursor:pointer; }
.hidden{ display:none !important; }

.app{
  max-width: 480px;
  margin: 0 auto;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--ink);
  overflow: hidden;
}

/* ============ TOP BAR ============ */
.topbar{
  display:flex; align-items:center; justify-content:space-between;
  padding: 16px 18px 12px;
  z-index: 20;
  position: relative;
}
.brand{ display:flex; align-items:center; gap:8px; }
.brand-mark{ color: var(--cyan); font-size: 20px; }
.brand-name{ font-family: var(--font-display); font-weight:700; font-size:18px; letter-spacing:-0.01em; }

.lang-pill{
  display:flex; align-items:center; gap:6px;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--paper);
  padding: 7px 12px 7px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
}
.lang-pill .chev{ color: var(--mist); font-size: 11px; margin-left: 2px; }

/* ============ ONBOARDING ============ */
.onboard{
  position:fixed; inset:0; z-index:200;
  background: var(--ink);
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  padding: 40px 30px; text-align:center;
}
.onboard-slides{ position:relative; width:100%; max-width:340px; }
.onboard-slide{ display:none; flex-direction:column; align-items:center; animation: fadeIn .3s ease; }
.onboard-slide.active{ display:flex; }
@keyframes fadeIn{ from{ opacity:0; transform: translateY(8px);} to{ opacity:1; transform:translateY(0);} }
.ob-icon{ font-size: 30px; color: var(--cyan); }
.onboard-slide h1{ font-family: var(--font-display); font-size:22px; margin:6px 0 2px; }
.ob-sub{ color: var(--mist); font-size:13px; margin:0 0 30px; }
.ob-art{ font-size:46px; margin-bottom:20px; }
.onboard-slide h2{ font-family: var(--font-display); font-size:19px; margin:0 0 10px; }
.onboard-slide p{ color: var(--mist); font-size:14px; line-height:1.6; max-width:280px; }
.ob-dots{ display:flex; gap:7px; margin: 26px 0 20px; }
.ob-dots span{ width:6px; height:6px; border-radius:50%; background: var(--line); }
.ob-dots span.active{ background: var(--cyan); width:16px; border-radius:99px; transition: all .2s ease; }
.ob-start{ width: 100%; max-width: 300px; }

/* ============ TOP BAR (right cluster) ============ */
.topbar-right{ display:flex; align-items:center; gap:8px; }
.icon-pill{
  width:34px; height:34px; border-radius:50%;
  background: var(--panel); border:1px solid var(--line); color: var(--paper);
  font-size: 14px; display:flex; align-items:center; justify-content:center;
}

/* ============ VIEWS ============ */
.view{ display:none; flex:1; min-height:0; position:relative; }
.view[data-active="true"]{ display:flex; flex-direction:column; }
#view-tray[data-active="true"], #view-settings[data-active="true"]{
  display:block; overflow-y:auto; padding: 4px 18px 100px;
}

/* ============ SCAN / CAMERA ============ */
.camera-stage{
  position: relative;
  flex: 1;
  margin: 0 12px 12px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
  min-height: 0;
}
#video{
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
  display:block;
}
#overlay{
  position:absolute; inset:0;
  width:100%; height:100%;
  transform: scaleX(-1);
}

.viewfinder{ position:absolute; inset:14px; pointer-events:none; z-index:5; }
.vf-corner{
  position:absolute; width:26px; height:26px;
  border-color: rgba(244,247,250,0.55);
  border-style: solid; border-width:0;
}
.vf-corner.tl{ top:0; left:0; border-top-width:2.5px; border-left-width:2.5px; border-top-left-radius:10px; }
.vf-corner.tr{ top:0; right:0; border-top-width:2.5px; border-right-width:2.5px; border-top-right-radius:10px; }
.vf-corner.bl{ bottom:0; left:0; border-bottom-width:2.5px; border-left-width:2.5px; border-bottom-left-radius:10px; }
.vf-corner.br{ bottom:0; right:0; border-bottom-width:2.5px; border-right-width:2.5px; border-bottom-right-radius:10px; }

.scan-status{
  position:absolute; top:14px; left:50%; transform:translateX(-50%);
  display:flex; align-items:center; gap:7px;
  background: rgba(10,15,20,0.6);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  padding: 7px 14px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--paper);
  z-index: 10;
}
.scan-status .dot{
  width:7px; height:7px; border-radius:50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse{ 0%,100%{ opacity:1; transform:scale(1);} 50%{ opacity:.4; transform:scale(0.7);} }

.cam-flip{
  position:absolute; top:14px; right:14px; z-index:10;
  width:38px; height:38px; border-radius:50%;
  background: rgba(10,15,20,0.6);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  color: var(--paper);
  font-size: 17px;
  display:flex; align-items:center; justify-content:center;
}
.cam-flip:active{ transform: scale(0.92); }

.label-settings-btn{
  position:absolute; top:60px; right:14px; z-index:10;
  width:38px; height:38px; border-radius:50%;
  background: rgba(10,15,20,0.6);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  color: var(--paper);
  font-size: 13px; font-weight:700;
  display:flex; align-items:center; justify-content:center;
}
.label-settings-btn:active{ transform: scale(0.92); }

.anchors-layer{ position:absolute; inset:0; z-index:8; pointer-events:none; }
.anchor-pill{
  position:absolute;
  transform: translate(-50%, -100%);
  background: #34D399;
  color: #06281C;
  font-family: var(--font-mono);
  font-weight:600;
  font-size: calc(11px * var(--label-scale, 1));
  padding: 5px 10px;
  border-radius: 8px;
  white-space: nowrap;
  pointer-events: auto;
  box-shadow: 0 4px 14px rgba(0,0,0,0.35);
  animation: pinDrop .22s ease;
}
@keyframes pinDrop{ from{ opacity:0; transform: translate(-50%,-80%) scale(0.7);} to{ opacity:1; transform: translate(-50%,-100%) scale(1);} }

.unlock-audio-banner{
  position:absolute; bottom:14px; left:14px; right:14px; z-index:12;
  background: rgba(255,180,84,0.95); color:#241505;
  font-weight:600; font-size:13px; text-align:center;
  padding: 10px 14px; border-radius: 12px;
  animation: pulse 1.6s ease-in-out infinite;
}

.auto-pill-layer{ position:absolute; inset:0; z-index:9; pointer-events:none; display:flex; justify-content:center; }
.auto-pill{
  position:absolute; top:16px;
  background: #34D399; color:#06281C;
  font-family: var(--font-mono); font-weight:700; font-size:13px;
  padding: 8px 16px; border-radius: 999px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  animation: autoPillIn .25s ease, autoPillOut .4s ease 2.4s forwards;
  display:flex; align-items:center; gap:6px;
}
@keyframes autoPillIn{ from{ opacity:0; transform: translateY(-8px) scale(0.9);} to{ opacity:1; transform: translateY(0) scale(1);} }
@keyframes autoPillOut{ to{ opacity:0; transform: translateY(-8px) scale(0.9);} }

.anchor-fab{
  position:absolute; z-index: 20;
  left: 50%; bottom: 100px; transform: translateX(-50%);
  width:52px; height:52px; border-radius:50%;
  background: var(--amber); color:#241505; border:none;
  font-size: 22px; font-weight:700;
  box-shadow: 0 8px 24px rgba(255,180,84,0.4);
}
.anchor-fab:active{ transform: translateX(-50%) scale(0.92); }

.camera-error{
  position:absolute; inset:0; z-index:15;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:10px; padding: 30px;
  background: var(--ink-soft);
  text-align:center;
}
.ce-title{ font-family: var(--font-display); font-weight:700; font-size:18px; margin:0; }
.ce-body{ color: var(--mist); font-size: 13.5px; margin:0 0 6px; line-height:1.5; }

/* bounding boxes drawn on canvas via JS, but label chip is HTML for crispness */
.box-label{
  position:absolute;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--ink);
  background: var(--cyan);
  padding: 3px 8px;
  border-radius: 6px;
  transform: scaleX(-1);
  white-space: nowrap;
  pointer-events:none;
  z-index: 6;
}

/* ============ WORD CARD ============ */
.word-card{
  position:absolute; left:12px; right:12px; bottom:14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 10px 20px 20px;
  z-index: 30;
  box-shadow: 0 -8px 40px rgba(0,0,0,0.45);
  animation: slideUp .28s cubic-bezier(.2,.8,.2,1);
}
@keyframes slideUp{ from{ transform: translateY(30px); opacity:0;} to{ transform: translateY(0); opacity:1;} }
.wc-handle{ width:36px; height:4px; background: var(--line); border-radius:99px; margin: 0 auto 12px; }
.wc-row{ display:flex; align-items:center; justify-content:space-between; }
.wc-en{ font-family: var(--font-mono); font-size:12px; color: var(--mist); text-transform:uppercase; letter-spacing:0.06em; }
.wc-close{ background:none; border:none; color: var(--mist); font-size:16px; padding:4px; }
.wc-translated{ margin-top: 6px; }
.wc-word{ font-family: var(--font-display); font-size: 30px; font-weight:700; letter-spacing:-0.01em; }
.wc-phonetic{ font-family: var(--font-mono); color: var(--cyan); font-size: 13px; margin-top: 4px; min-height: 16px; }
.wc-actions{ display:flex; gap:10px; margin-top:16px; }
.wc-btn{
  flex:1; display:flex; align-items:center; justify-content:center; gap:7px;
  padding: 13px 10px; border-radius: var(--radius-md);
  font-weight: 600; font-size: 14px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--paper);
  transition: transform .12s ease;
}
.wc-btn:active{ transform: scale(0.96); }
.wc-btn .ic{ font-size: 13px; }
.wc-speak{ border-color: var(--cyan); color: var(--cyan); }
.wc-save{ background: var(--amber); color: #241505; border-color: var(--amber); }
.wc-save.saved{ background: var(--panel-2); color: var(--amber); border-color: var(--amber); }
.wc-anchor{ width:100%; margin-top:10px; border-color: #34D399; color:#34D399; background:var(--panel-2); }
.wc-anchor.pinned{ background:#34D399; color:#06281C; border-color:#34D399; }

.catch-toast{
  position:absolute; bottom: 24px; left:50%; transform: translateX(-50%);
  background: var(--paper); color: var(--ink);
  padding: 10px 18px; border-radius: 999px;
  font-size: 13px; font-weight:600;
  z-index: 40;
  animation: toastIn .25s ease, toastOut .3s ease 1.6s forwards;
}
@keyframes toastIn{ from{ opacity:0; transform: translate(-50%,10px);} to{ opacity:1; transform: translate(-50%,0);} }
@keyframes toastOut{ to{ opacity:0; transform: translate(-50%,-10px);} }

/* ============ TRAY / FLASHCARDS ============ */
.tray-header{ padding: 14px 0 6px; }
.tray-header-row{ display:flex; align-items:flex-start; justify-content:space-between; }
.tray-header-actions{ display:flex; gap:8px; margin-top:2px; }
.tray-header h1{ font-family: var(--font-display); font-size:26px; margin:0 0 2px; letter-spacing:-0.01em; }
.tray-sub{ color: var(--mist); font-size: 13.5px; margin:0; font-family: var(--font-mono); }
.tray-search{
  width:100%; margin-top:14px; padding: 11px 14px;
  background: var(--panel); border:1px solid var(--line); border-radius: var(--radius-md);
  color: var(--paper); font-size:14px; font-family: var(--font-body);
}
.tray-search::placeholder{ color: var(--mist); }

.label-slider{ width:100%; accent-color: var(--cyan); margin-top:6px; }

.tray-empty{
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  text-align:center; padding: 60px 20px; color: var(--mist);
}
.te-icon{ font-size: 34px; color: var(--cyan); margin-bottom: 10px; }
.te-title{ font-family: var(--font-display); font-weight:700; color: var(--paper); font-size:17px; margin:0 0 6px;}
.te-body{ font-size: 13.5px; line-height:1.5; margin:0; max-width: 260px; }

.tray-grid{
  display:grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px;
}
.flashcard{
  position:relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 16px 14px 14px;
  min-height: 128px;
  display:flex; flex-direction:column; justify-content:space-between;
  cursor: pointer;
  perspective: 800px;
}
.fc-front, .fc-back{ transition: opacity .18s ease; }
.fc-back{ display:none; }
.flashcard.flipped .fc-front{ display:none; }
.flashcard.flipped .fc-back{ display:block; }
.fc-word{ font-family: var(--font-display); font-weight:700; font-size:18px; line-height:1.25; }
.fc-en{ font-family: var(--font-mono); font-size: 11px; color: var(--mist); text-transform:uppercase; letter-spacing:0.05em; margin-top:4px; }
.fc-foot{ display:flex; align-items:center; justify-content:space-between; margin-top:10px; }
.fc-flag{ font-size: 15px; }
.fc-row-btns{ display:flex; gap:6px; }
.fc-icon-btn{
  background: var(--panel-2); border: 1px solid var(--line); color: var(--paper);
  width: 28px; height:28px; border-radius: 8px; font-size: 12px;
  display:flex; align-items:center; justify-content:center;
}
.fc-icon-btn.danger{ color: var(--danger); }

/* ============ SETTINGS ============ */
.settings-block{ margin-top: 22px; }
.settings-label{ display:block; font-size:12.5px; color: var(--mist); font-family: var(--font-mono); text-transform:uppercase; letter-spacing:0.05em; margin-bottom: 10px; }

.lang-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.lang-chip{
  display:flex; flex-direction:column; align-items:center; gap:4px;
  background: var(--panel); border: 1px solid var(--line); color: var(--paper);
  padding: 12px 6px; border-radius: var(--radius-sm); font-size: 12px; font-weight:500;
}
.lang-chip .flag{ font-size: 20px; }
.lang-chip.active{ border-color: var(--cyan); background: var(--cyan-dim); color: var(--cyan); }

.segmented{ display:flex; background: var(--panel); border:1px solid var(--line); border-radius: 999px; padding:3px; }
.segmented button{ flex:1; background:none; border:none; color: var(--mist); padding: 9px 0; border-radius: 999px; font-size: 13px; font-weight:600; }
.segmented button.active{ background: var(--amber); color:#241505; }

.btn{ border-radius: var(--radius-md); padding: 13px 18px; font-weight:600; font-size:14px; border:1px solid transparent; }
.btn-amber{ background: var(--amber); color:#241505; }
.btn-ghost{ background: var(--panel); border-color: var(--line); color: var(--paper); width:100%; }
.btn-danger{ color: var(--danger); }

.settings-footnote{ color: var(--mist); font-size: 12px; line-height:1.6; margin-top: 26px; padding-top:18px; border-top:1px solid var(--line); }

/* ============ BOTTOM NAV ============ */
.bottombar{
  display:flex; z-index: 25;
  background: var(--ink-soft);
  border-top: 1px solid var(--line);
  padding: 8px 10px calc(10px + env(safe-area-inset-bottom));
}
.nav-btn{
  flex:1; display:flex; flex-direction:column; align-items:center; gap:3px;
  background:none; border:none; color: var(--mist); font-size: 11px; font-weight:500;
  padding: 6px 0; position:relative;
}
.nav-btn .nav-ic{ font-size: 19px; }
.nav-btn.active{ color: var(--cyan); }
.nav-badge{
  position:absolute; top:0; right: 24%;
  background: var(--amber); color:#241505;
  font-size: 9.5px; font-weight:700;
  min-width:15px; height:15px; border-radius:999px;
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-mono);
}

/* ============ LANGUAGE SHEET ============ */
.sheet-backdrop{
  position:fixed; inset:0; background: rgba(0,0,0,0.6);
  display:flex; align-items:flex-end; justify-content:center;
  z-index: 100;
}
.sheet{
  width:100%; max-width: 480px;
  background: var(--panel);
  border-radius: 24px 24px 0 0;
  padding: 10px 18px calc(24px + env(safe-area-inset-bottom));
  animation: slideUp .25s ease;
  max-height: 70vh; overflow-y:auto;
}
.sheet-handle{ width:36px; height:4px; background: var(--line); border-radius:99px; margin: 6px auto 16px; }
.sheet h2{ font-family: var(--font-display); font-size:18px; margin: 0 0 14px; }

.instr-list{ display:flex; flex-direction:column; gap:16px; padding-bottom:6px; }
.instr-item{ display:flex; gap:12px; align-items:flex-start; }
.instr-ic{ font-size:18px; width:32px; height:32px; flex-shrink:0; border-radius:9px; background:var(--panel-2); display:flex; align-items:center; justify-content:center; }
.instr-item b{ font-family: var(--font-display); font-size:14.5px; }
.instr-item p{ margin:3px 0 0; color: var(--mist); font-size:13px; line-height:1.5; }

@media (max-width: 380px){
  .wc-word{ font-size: 25px; }
  .tray-grid{ gap:9px; }
}