/* ============ Design tokens ============ */
:root {
  color-scheme: dark;

  --bg: #0a0c12;
  --bg-glow-1: #1b1440;
  --bg-glow-2: #0d2b2a;
  --surface: #141821;
  --surface-2: #1a1f2b;
  --surface-hover: #1f2530;
  --border: #262c3a;
  --border-strong: #363d4f;
  --text: #eef0f6;
  --text-muted: #8b93a7;
  --text-faint: #5c6579;

  --accent: #6366f1;
  --accent-hover: #7c7ff5;
  --accent-soft: rgba(99, 102, 241, 0.16);
  --accent-text: #ffffff;

  --success: #2dd4bf;
  --success-soft: rgba(45, 212, 191, 0.14);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.14);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 0 1px var(--accent-soft), 0 8px 24px rgba(99, 102, 241, 0.15);

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 20px;

  --font: "Inter", "Segoe UI", ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

:root[data-theme="light"] {
  color-scheme: light;

  --bg: #f4f5fa;
  --bg-glow-1: #e4e2ff;
  --bg-glow-2: #dcf5f0;
  --surface: #ffffff;
  --surface-2: #f6f7fb;
  --surface-hover: #eef0f7;
  --border: #e3e5ee;
  --border-strong: #cdd1e0;
  --text: #171a24;
  --text-muted: #656c80;
  --text-faint: #98a0b3;

  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: rgba(79, 70, 229, 0.10);
  --accent-text: #ffffff;

  --success: #0d9488;
  --success-soft: rgba(13, 148, 136, 0.10);
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.10);

  --shadow-sm: 0 2px 8px rgba(23, 26, 36, 0.06);
  --shadow-md: 0 16px 40px rgba(23, 26, 36, 0.10);
  --shadow-glow: 0 0 0 1px var(--accent-soft), 0 8px 24px rgba(79, 70, 229, 0.10);
}

* { box-sizing: border-box; }

.hidden { display: none; }
.temp-result { margin-top: 14px; }

html, body { height: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  overflow-x: hidden;
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(720px 420px at 12% -8%, var(--bg-glow-1) 0%, transparent 60%),
    radial-gradient(680px 420px at 100% 10%, var(--bg-glow-2) 0%, transparent 55%);
  opacity: 0.35;
  animation: driftGlow 18s ease-in-out infinite alternate;
}

@keyframes driftGlow {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(-2%, 2%, 0) scale(1.05); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

button, input { font-family: inherit; }

/* ============ Shared: buttons ============ */
.btn {
  width: 100%;
  padding: 13px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 0.15s var(--ease), box-shadow 0.15s var(--ease), background-color 0.15s var(--ease), opacity 0.15s;
}

.btn:hover { background: var(--accent-hover); box-shadow: var(--shadow-glow); }
.btn:active { transform: translateY(1px) scale(0.99); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { background: var(--surface-hover); box-shadow: none; }

.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #ef4444; box-shadow: 0 8px 24px rgba(248, 113, 113, 0.25); }

.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ Icon buttons ============ */
.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s var(--ease);
  flex-shrink: 0;
}
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); transform: translateY(-1px); }
.icon-btn.danger:hover { border-color: var(--danger); color: var(--danger); background: var(--danger-soft); }
.icon-btn.copied { border-color: var(--success); color: var(--success); background: var(--success-soft); }

/* ============ Fade-in stagger ============ */
.fade-in { animation: fadeInUp 0.5s var(--ease) both; }
.fade-in:nth-child(1) { animation-delay: 0.03s; }
.fade-in:nth-child(2) { animation-delay: 0.09s; }
.fade-in:nth-child(3) { animation-delay: 0.15s; }
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}
.shake { animation: shake 0.5s var(--ease); }

/* ============ Login page ============ */
.login-wrap {
  min-height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
}

.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 20;
}

.login-card {
  width: min(380px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px 32px;
  text-align: center;
  box-shadow: var(--shadow-md);
  animation: fadeInUp 0.55s var(--ease) both;
}

.brand-mark {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(145deg, var(--accent), #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: var(--shadow-glow);
}
.brand-mark svg { width: 26px; height: 26px; color: #fff; }

.login-card h1 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.login-card p.sub {
  color: var(--text-muted);
  font-size: 13.5px;
  margin: 0 0 26px;
  line-height: 1.5;
}

.pin-input {
  width: 100%;
  font-size: 26px;
  font-family: var(--font-mono);
  letter-spacing: 12px;
  text-align: center;
  padding: 15px 10px 15px 22px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  outline: none;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.pin-input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.pin-input::placeholder { color: var(--text-faint); letter-spacing: 8px; }

.login-card .btn { margin-top: 18px; }

.error-msg {
  color: var(--danger);
  font-size: 13px;
  min-height: 18px;
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.security-note {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 11.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.security-note svg { width: 13px; height: 13px; flex-shrink: 0; }

/* ============ App shell ============ */
.topbar {
  width: 100%;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15.5px;
  letter-spacing: -0.01em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(145deg, var(--accent), #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
}
.brand-icon svg { width: 16px; height: 16px; color: #fff; }

.topbar-actions { display: flex; gap: 8px; }

.container {
  width: 100%;
  max-width: 760px;
  padding: 28px 20px 70px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 18px;
  transition: border-color 0.2s;
}

.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
}

.card-head h2 {
  font-size: 14.5px;
  font-weight: 600;
  margin: 0 0 3px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card-head h2 svg { width: 16px; height: 16px; color: var(--accent); }

.card-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: 12.5px;
  line-height: 1.5;
}

.badge {
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--success-soft);
  color: var(--success);
  white-space: nowrap;
}

.form-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.form-row input {
  flex: 1;
  min-width: 180px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.form-row input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.form-row input::placeholder { color: var(--text-faint); }

.form-row .btn { width: auto; margin-top: 0; padding: 12px 20px; white-space: nowrap; }

.input-paste {
  position: relative;
  flex: 1;
  min-width: 180px;
}
.input-paste input { width: 100%; padding-right: 84px; }

.paste-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  padding: 6px 11px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: var(--surface-hover);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
  transition: all 0.15s var(--ease);
}
.paste-btn svg { width: 13px; height: 13px; flex-shrink: 0; }
.paste-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.paste-btn.pasted { border-color: var(--success); color: var(--success); background: var(--success-soft); }

.hint {
  color: var(--text-faint);
  font-size: 12px;
  margin-top: 12px;
  line-height: 1.5;
  display: flex;
  gap: 6px;
}
.hint svg { width: 14px; height: 14px; flex-shrink: 0; margin-top: 1px; color: var(--text-faint); }

/* ============ Entries ============ */
.entries { display: flex; flex-direction: column; gap: 12px; }

.entry {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  user-select: none;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.entry:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.entry:active { transform: translateY(0) scale(0.995); }

.entry-avatar {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  flex-shrink: 0;
}

.entry-main { flex: 1; min-width: 0; }

.entry-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.entry-code {
  font-family: var(--font-mono);
  font-size: 27px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--text);
  transition: opacity 0.15s;
}

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

.ring {
  position: relative;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}
.ring svg { transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 3; }
.ring .track { stroke: var(--border); }
.ring .progress {
  stroke: var(--success);
  stroke-linecap: round;
  transition: stroke-dashoffset 1s linear, stroke 0.3s;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 52px 20px;
  font-size: 14px;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  animation: fadeInUp 0.4s var(--ease) both;
}
.empty-state svg { width: 34px; height: 34px; color: var(--text-faint); margin-bottom: 10px; }

/* ============ Toast ============ */
.toast {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%) translateY(24px) scale(0.96);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 11px 20px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: all 0.28s var(--ease);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 50;
}
.toast svg { width: 15px; height: 15px; color: var(--success); flex-shrink: 0; }
.toast.error svg { color: var(--danger); }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }

/* ============ Modal ============ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 6, 12, 0.55);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s var(--ease);
  padding: 20px;
}
.modal-overlay.show { opacity: 1; pointer-events: auto; }

.modal-card {
  width: min(380px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
  transform: scale(0.94) translateY(6px);
  transition: transform 0.22s var(--ease);
}
.modal-overlay.show .modal-card { transform: scale(1) translateY(0); }

.modal-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--danger-soft);
  color: var(--danger);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.modal-icon svg { width: 20px; height: 20px; }

.modal-card h3 { margin: 0 0 8px; font-size: 16px; }
.modal-card p { margin: 0 0 20px; color: var(--text-muted); font-size: 13.5px; line-height: 1.55; }
.modal-actions { display: flex; gap: 10px; }
.modal-actions .btn { margin-top: 0; }

@media (max-width: 480px) {
  .entry-code { font-size: 22px; letter-spacing: 2px; }
  .pin-input { letter-spacing: 8px; font-size: 22px; }
}