/* ===== Design Tokens ===== */
:root {
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --bg-base: #f8faff;
  --bg-card: rgba(255,255,255,0.72);
  --bg-card-solid: #ffffff;
  --text-1: #0f172a;
  --text-2: #475569;
  --text-3: #94a3b8;
  --border: rgba(148,163,184,0.25);
  --border-focus: #818cf8;
  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --accent-glow: rgba(99,102,241,0.25);
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --blur: 20px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-base: #0a0a1a;
  --bg-card: rgba(30,30,60,0.65);
  --bg-card-solid: #1a1a3e;
  --text-1: #e2e8f0;
  --text-2: #94a3b8;
  --text-3: #64748b;
  --border: rgba(100,116,139,0.25);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
}

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

body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-2);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}

/* ===== Ambient Background ===== */
.ambient-bg { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.orb {
  position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.35;
  animation: orbFloat 20s ease-in-out infinite;
}
.orb-1 { width: 400px; height: 400px; background: #818cf8; top: -100px; left: -100px; }
.orb-2 { width: 350px; height: 350px; background: #c084fc; bottom: -80px; right: -80px; animation-delay: -7s; }
.orb-3 { width: 300px; height: 300px; background: #38bdf8; top: 50%; left: 50%; transform: translate(-50%,-50%); animation-delay: -14s; }
[data-theme="dark"] .orb { opacity: 0.15; }

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* ===== Header ===== */
.app-header {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur)); -webkit-backdrop-filter: blur(var(--blur));
  border-bottom: 1px solid var(--border);
}
.logo { display: flex; align-items: center; gap: 0.5rem; }
.logo-icon {
  font-size: 1.4rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.logo-text { font-size: 1.2rem; font-weight: 800; color: var(--text-1); letter-spacing: -0.02em; }
.icon-btn {
  width: 40px; height: 40px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg-card); color: var(--text-1); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.icon-btn:hover { background: var(--accent); color: white; border-color: var(--accent); transform: scale(1.05); }

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: 5rem; left: 50%; transform: translateX(-50%) translateY(120%);
  padding: 0.75rem 1.5rem; border-radius: var(--radius-md);
  background: var(--bg-card-solid); color: var(--text-1);
  box-shadow: var(--shadow-lg); z-index: 2000; opacity: 0;
  font-size: 0.875rem; font-weight: 600; white-space: nowrap;
  backdrop-filter: blur(var(--blur));
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { background: var(--success); color: #fff; }
.toast.error { background: var(--error); color: #fff; }
.toast.info { background: var(--accent); color: #fff; }

/* ===== Offline ===== */
.offline-banner {
  display: flex; align-items: center; gap: 0.5rem; justify-content: center;
  padding: 0.5rem; background: var(--error); color: white;
  font-size: 0.8rem; font-weight: 600;
}

/* ===== Tab Navigation ===== */
.tab-nav {
  position: sticky; top: 56px; z-index: 90;
  display: flex; justify-content: center; gap: 0.25rem;
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur)); -webkit-backdrop-filter: blur(var(--blur));
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  display: flex; align-items: center; gap: 0.4rem;
  padding: 0.6rem 1.25rem; border-radius: var(--radius-md);
  border: none; background: transparent; color: var(--text-3);
  font-family: var(--font); font-size: 0.875rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
}
.tab-btn:hover { color: var(--text-1); background: rgba(99,102,241,0.08); }
.tab-btn.active {
  color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 4px 12px var(--accent-glow);
}

/* ===== Tab Panels ===== */
.tab-panel { display: none; padding: 1rem; max-width: 560px; margin: 0 auto; position: relative; z-index: 1; }
.tab-panel.active { display: block; animation: fadeSlideIn 0.35s ease forwards; }
@keyframes fadeSlideIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* ===== Section Cards ===== */
.section-card {
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur)); -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.section-card:hover { box-shadow: var(--shadow-md); }
.section-card h2 { color: var(--text-1); font-size: 1.1rem; font-weight: 700; margin-bottom: 1rem; }
.section-card h3 { color: var(--text-1); font-size: 1rem; font-weight: 700; margin-bottom: 0.75rem; }

/* ===== Scanner ===== */
.scan-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.scan-header h2 { margin: 0; }
.scan-badge {
  display: flex; align-items: center; gap: 0.4rem;
  padding: 0.3rem 0.75rem; border-radius: 20px;
  background: rgba(16,185,129,0.1); color: var(--success);
  font-size: 0.75rem; font-weight: 600;
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); animation: pulse 2s infinite; }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.scanner-wrapper { position: relative; border-radius: var(--radius-md); overflow: hidden; margin-bottom: 0.75rem; }
#reader {
  width: 100% !important; height: 280px !important; max-height: 45vh !important;
  border-radius: var(--radius-md) !important; overflow: hidden !important;
  background: #111;
}
#reader > div, #reader video, #reader canvas {
  width: 100% !important; height: 280px !important; max-height: 45vh !important;
  object-fit: cover !important; border-radius: var(--radius-md) !important;
}
#reader__dashboard, #reader__dashboard_section, #reader__dashboard_section_csr { height: auto !important; max-height: none !important; }
#reader__scan_region { max-height: 45vh !important; height: 280px !important; }

.scan-overlay {
  position: absolute; inset: 0; pointer-events: none; z-index: 5;
  display: flex; align-items: center; justify-content: center;
}
.scan-frame { position: relative; width: 220px; height: 220px; }
.corner {
  position: absolute; width: 28px; height: 28px;
  border-color: var(--accent); border-style: solid; border-width: 0;
}
.corner.tl { top: 0; left: 0; border-top-width: 3px; border-left-width: 3px; border-radius: 6px 0 0 0; }
.corner.tr { top: 0; right: 0; border-top-width: 3px; border-right-width: 3px; border-radius: 0 6px 0 0; }
.corner.bl { bottom: 0; left: 0; border-bottom-width: 3px; border-left-width: 3px; border-radius: 0 0 0 6px; }
.corner.br { bottom: 0; right: 0; border-bottom-width: 3px; border-right-width: 3px; border-radius: 0 0 6px 0; }
.scan-line {
  position: absolute; left: 4px; right: 4px; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: scanLine 2.5s ease-in-out infinite;
}
@keyframes scanLine { 0%, 100% { top: 5%; } 50% { top: 92%; } }

.result-box {
  padding: 0.75rem 1rem; border-radius: var(--radius-sm);
  background: rgba(99,102,241,0.06); color: var(--text-2);
  font-size: 0.875rem; line-height: 1.6;
  border: 1px solid var(--border);
  word-break: break-all;
  transition: all var(--transition);
}
.result-box.success { background: rgba(16,185,129,0.1); border-color: var(--success); color: var(--success); }
.result-box.error { background: rgba(239,68,68,0.1); border-color: var(--error); color: var(--error); }
.result-box pre { 
  margin: 0.5rem 0 0; padding: 0.5rem; border-radius: 8px;
  background: rgba(0,0,0,0.04); font-size: 0.8rem;
  white-space: pre-wrap; word-break: break-all;
  font-family: 'SF Mono', Consolas, monospace;
  color: var(--text-1);
}

/* Camera Controls */
.camera-controls { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.75rem; }
.ctrl-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.55rem 1rem; border-radius: var(--radius-sm); border: none;
  font-family: var(--font); font-size: 0.8rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white; box-shadow: 0 2px 8px var(--accent-glow);
}
.ctrl-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 16px var(--accent-glow); }
.ctrl-btn:active { transform: translateY(0); }
.ctrl-btn.secondary {
  background: var(--bg-card-solid); color: var(--text-1);
  border: 1px solid var(--border); box-shadow: var(--shadow-sm);
}
.ctrl-btn.secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ===== File Upload ===== */
.file-drop-zone {
  border: 2px dashed var(--border); border-radius: var(--radius-md);
  padding: 2rem 1rem; text-align: center; cursor: pointer;
  transition: all var(--transition); background: transparent;
}
.file-drop-zone:hover, .file-drop-zone.dragover {
  border-color: var(--accent); background: rgba(99,102,241,0.04);
}
.file-drop-zone:hover .drop-icon svg { stroke: var(--accent); transform: scale(1.1); }
.drop-icon svg { transition: all var(--transition); stroke: var(--text-3); }
.drop-text { color: var(--text-1); font-weight: 600; font-size: 0.9rem; margin-top: 0.75rem; }
.drop-hint { color: var(--text-3); font-size: 0.75rem; margin-top: 0.25rem; }

/* ===== Template Grid ===== */
.template-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem; margin-bottom: 1rem; }
.tmpl-btn {
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  padding: 1rem 0.5rem; border-radius: var(--radius-md);
  border: 1px solid var(--border); background: var(--bg-card);
  cursor: pointer; font-family: var(--font); font-size: 0.8rem; font-weight: 600; color: var(--text-1);
  transition: all var(--transition);
}
.tmpl-btn:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.tmpl-btn:active { transform: translateY(-1px); }
.tmpl-icon { font-size: 1.75rem; }

/* Template Forms */
.tmpl-form {
  display: none; padding: 1.25rem; border-radius: var(--radius-md);
  border: 1px solid var(--border); background: var(--bg-card);
  margin-bottom: 1rem;
}
.tmpl-form.active { display: block; animation: fadeSlideIn 0.3s ease; }
.tmpl-form h3 { margin-bottom: 1rem; }
.tmpl-form label { display: block; font-size: 0.8rem; font-weight: 600; color: var(--text-1); margin-bottom: 0.3rem; }
.tmpl-form input, .tmpl-form select {
  width: 100%; padding: 0.65rem 0.9rem; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--bg-card-solid);
  color: var(--text-1); font-family: var(--font); font-size: 0.85rem;
  margin-bottom: 0.75rem; transition: all var(--transition); outline: none;
}
.tmpl-form input:focus, .tmpl-form select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

.form-actions { display: flex; gap: 0.5rem; margin-top: 0.25rem; }
.gen-btn {
  flex: 1; padding: 0.65rem; border: none; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white; font-family: var(--font); font-weight: 700; font-size: 0.85rem;
  cursor: pointer; transition: all var(--transition);
}
.gen-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 16px var(--accent-glow); }
.cancel-btn {
  padding: 0.65rem 1rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: transparent; color: var(--text-2);
  font-family: var(--font); font-weight: 600; font-size: 0.85rem; cursor: pointer;
  transition: all var(--transition);
}
.cancel-btn:hover { border-color: var(--error); color: var(--error); }

.clipboard-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.65rem 1.25rem; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg-card); color: var(--text-1);
  font-family: var(--font); font-size: 0.85rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition); width: 100%; justify-content: center;
}
.clipboard-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ===== QR Options ===== */
.qr-options { display: flex; flex-wrap: wrap; gap: 1rem; align-items: flex-end; }
.opt-label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.8rem; font-weight: 600; color: var(--text-2); }
.opt-label input[type="color"] { width: 44px; height: 32px; border: 1px solid var(--border); border-radius: 8px; cursor: pointer; padding: 2px; }
.opt-label input[type="range"] { width: 120px; accent-color: var(--accent); }
.opt-label select {
  padding: 0.4rem 0.6rem; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-card-solid); color: var(--text-1);
  font-family: var(--font); font-size: 0.8rem; outline: none;
}

/* ===== QR Output ===== */
.qr-output { display: flex; justify-content: center; padding: 1.5rem; }
.qr-output canvas { border-radius: var(--radius-sm); box-shadow: var(--shadow-md); }
.qr-actions { display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap; }
.action-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.55rem 1rem; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg-card-solid); color: var(--text-1);
  font-family: var(--font); font-size: 0.8rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
}
.action-btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }

/* ===== History ===== */
.history-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.history-header h2 { margin: 0; }
.history-count { font-size: 0.75rem; font-weight: 700; color: var(--accent); background: var(--accent-glow); padding: 0.2rem 0.6rem; border-radius: 20px; }

.search-box {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 0.9rem; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--bg-card-solid);
  margin-bottom: 0.75rem; transition: all var(--transition);
}
.search-box:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.search-box svg { flex-shrink: 0; stroke: var(--text-3); }
.search-box input { border: none; background: none; outline: none; width: 100%; color: var(--text-1); font-family: var(--font); font-size: 0.85rem; }

.history-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; margin-bottom: 0.75rem; }
.filter-group { display: flex; gap: 0.25rem; }
.filter-btn {
  padding: 0.4rem 0.75rem; border-radius: 20px; border: 1px solid var(--border);
  background: transparent; color: var(--text-2);
  font-family: var(--font); font-size: 0.75rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
}
.filter-btn.active { background: var(--accent); color: white; border-color: var(--accent); }
.sort-select {
  padding: 0.4rem 0.6rem; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-card-solid); color: var(--text-1);
  font-family: var(--font); font-size: 0.75rem; outline: none; cursor: pointer;
}

.history-list { min-height: 60px; }
.history-item {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.75rem; border-radius: var(--radius-sm);
  transition: all var(--transition); cursor: pointer;
  border-bottom: 1px solid var(--border);
}
.history-item:last-child { border-bottom: none; }
.history-item:hover { background: rgba(99,102,241,0.04); }
.history-item .hi-type { font-size: 1.2rem; flex-shrink: 0; }
.history-item .hi-content { flex: 1; min-width: 0; }
.history-item .hi-text { font-size: 0.8rem; font-weight: 500; color: var(--text-1); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.history-item .hi-meta { font-size: 0.7rem; color: var(--text-3); margin-top: 0.15rem; }
.history-item .hi-actions { display: flex; gap: 0.25rem; flex-shrink: 0; }
.hi-btn {
  width: 32px; height: 32px; border-radius: 8px; border: 1px solid var(--border);
  background: transparent; color: var(--text-2); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; transition: all var(--transition);
}
.hi-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(99,102,241,0.06); }
.hi-btn.fav-active { color: var(--warning); border-color: var(--warning); }
.hi-btn.danger:hover { border-color: var(--error); color: var(--error); background: rgba(239,68,68,0.06); }
.history-empty { padding: 2rem; text-align: center; color: var(--text-3); font-size: 0.85rem; }

.history-actions { display: flex; gap: 0.5rem; margin-top: 0.75rem; flex-wrap: wrap; }
.hist-action-btn {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.45rem 0.8rem; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: transparent;
  color: var(--text-2); font-family: var(--font); font-size: 0.75rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
}
.hist-action-btn:hover { border-color: var(--accent); color: var(--accent); }
.hist-action-btn.danger { border-color: rgba(239,68,68,0.3); color: var(--error); }
.hist-action-btn.danger:hover { background: rgba(239,68,68,0.08); }

/* ===== Modal ===== */
.modal { display: none; position: fixed; inset: 0; z-index: 1000; align-items: center; justify-content: center; padding: 1rem; }
.modal.open { display: flex; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.5); backdrop-filter: blur(8px); animation: fadeIn 0.2s; }
.modal-content {
  position: relative; background: var(--bg-card-solid);
  border-radius: var(--radius-lg); padding: 1.5rem;
  max-width: 400px; width: 100%; box-shadow: var(--shadow-lg);
  animation: modalIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-align: center;
}
.modal-close {
  position: absolute; top: 0.75rem; right: 0.75rem;
  width: 36px; height: 36px; border-radius: 50%;
  border: none; background: rgba(0,0,0,0.05); color: var(--text-2);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.modal-close:hover { background: var(--error); color: white; }
.modal-qr { display: flex; justify-content: center; padding: 1.5rem 0; }
.modal-qr canvas { border-radius: var(--radius-sm); box-shadow: var(--shadow-md); }
.modal-actions { display: flex; gap: 0.5rem; justify-content: center; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalIn { from { opacity: 0; transform: scale(0.9); } to { opacity: 1; transform: scale(1); } }

.hidden { display: none !important; }

/* ===== Responsive ===== */
@media (min-width: 768px) {
  .tab-panel { max-width: 640px; }
  .template-grid { grid-template-columns: repeat(6, 1fr); }
  #reader { height: 360px !important; }
  #reader > div, #reader video, #reader canvas { height: 360px !important; }
}

@media (max-width: 360px) {
  .template-grid { grid-template-columns: repeat(2, 1fr); }
  .camera-controls { flex-direction: column; }
  .ctrl-btn { width: 100%; justify-content: center; }
}