/* ── Tokens ─────────────────────────────────────────────────────────────── */
:root {
  --bg:           #f0f4ff;
  --surface:      #ffffff;
  --surface2:     #eef2ff;
  --border:       #d8e0f0;
  --border-focus: #818cf8;
  --text:         #1e2540;
  --text-muted:   #5b6a8a;
  --accent:       #6366f1;
  --accent-hover: #4f46e5;
  --accent-light: rgba(99,102,241,.12);
  --danger:       #e53e3e;
  --danger-hover: #c53030;
  --danger-light: rgba(229,62,62,.10);
  --success:      #38a169;
  --warning:      #d97706;
  --shadow-sm:    0 1px 3px rgba(30,37,64,.08), 0 1px 2px rgba(30,37,64,.06);
  --shadow:       0 4px 16px rgba(30,37,64,.10), 0 1px 4px rgba(30,37,64,.06);
  --shadow-lg:    0 8px 32px rgba(30,37,64,.14);
  --radius:       16px;
  --radius-sm:    10px;
  --font:         -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --transition:   0.18s ease;
}

[data-theme="dark"] {
  --bg:           #111827;
  --surface:      #1f2937;
  --surface2:     #2d3748;
  --border:       #374151;
  --border-focus: #818cf8;
  --text:         #f1f5f9;
  --text-muted:   #94a3b8;
  --accent:       #818cf8;
  --accent-hover: #a5b4fc;
  --accent-light: rgba(129,140,248,.15);
  --danger:       #fc8181;
  --danger-hover: #f56565;
  --danger-light: rgba(252,129,129,.12);
  --success:      #68d391;
  --warning:      #f6ad55;
  --shadow-sm:    0 1px 3px rgba(0,0,0,.30);
  --shadow:       0 4px 16px rgba(0,0,0,.35);
  --shadow-lg:    0 8px 32px rgba(0,0,0,.50);
}

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

/* ── Base ────────────────────────────────────────────────────────────────── */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem 4rem;
  transition: background var(--transition), color var(--transition);
}

/* ── Layout ──────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 580px;
}

/* ── Header ──────────────────────────────────────────────────────────────── */
header {
  margin-bottom: 2rem;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--text);
}

.logo svg { color: var(--accent); flex-shrink: 0; }

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.tagline {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.35rem;
  line-height: 1.4;
}

/* Header controls: theme + language */
.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  box-shadow: var(--shadow-sm);
}

.icon-btn:hover { background: var(--surface2); color: var(--text); }

/* Language dropdown */
.lang-wrapper {
  position: relative;
}

#langBtn {
  width: auto;
  padding: 0 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
  gap: 0.3rem;
  white-space: nowrap;
}

#langBtn span { font-size: 0.78rem; }

.lang-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  min-width: 130px;
  overflow: hidden;
  display: none;
  z-index: 50;
}

.lang-dropdown.open { display: block; }

.lang-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.85rem;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background var(--transition);
  color: var(--text);
  user-select: none;
}

.lang-option:hover { background: var(--surface2); }
.lang-option.active { color: var(--accent); font-weight: 600; }

/* ── Card ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  transition: background var(--transition), border-color var(--transition);
}

/* ── Form elements ───────────────────────────────────────────────────────── */
.form-row { margin-top: 1.25rem; }

label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

textarea,
input[type="password"],
input[type="number"],
select {
  width: 100%;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.975rem;
  padding: 0.7rem 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  display: block;
  -webkit-appearance: none;
  appearance: none;
}

textarea {
  resize: vertical;
  min-height: 150px;
  line-height: 1.6;
}

textarea:focus,
input[type="password"]:focus,
input[type="number"]:focus,
select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-light);
}

textarea::placeholder,
input::placeholder { color: var(--text-muted); opacity: 0.7; }

.char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
  transition: color var(--transition);
}
.char-count.warn { color: var(--warning); }
.char-count.over { color: var(--danger); font-weight: 600; }

/* Two-column grid for options */
.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.25rem;
}
@media (max-width: 440px) { .options-grid { grid-template-columns: 1fr; } }

/* Toggle switch */
.toggle-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
  cursor: pointer;
  user-select: none;
}

.toggle {
  position: relative;
  width: 42px;
  height: 24px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; position: absolute; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 12px;
  transition: background var(--transition);
  cursor: pointer;
}
.toggle-slider::before {
  content: "";
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,.2);
  transition: transform var(--transition);
}
.toggle input:checked + .toggle-slider { background: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(18px); }

.toggle-label { font-size: 0.925rem; color: var(--text); }

/* Password section */
.password-section {
  margin-top: 0.85rem;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.25s ease, opacity 0.2s ease;
}
.password-section.visible { max-height: 80px; opacity: 1; }

/* Security note banner */
.security-note {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  background: var(--accent-light);
  border: 1px solid rgba(99,102,241,.2);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-top: 1.25rem;
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.55;
}
.security-note svg { flex-shrink: 0; margin-top: 1px; color: var(--accent); }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.975rem;
  font-weight: 600;
  padding: 0.78rem 1.4rem;
  cursor: pointer;
  transition: background var(--transition), transform 0.1s, box-shadow var(--transition);
  text-decoration: none;
  width: 100%;
  margin-top: 1.5rem;
  box-shadow: 0 2px 8px rgba(99,102,241,.25);
  letter-spacing: 0.01em;
}
.btn:hover:not(:disabled) { background: var(--accent-hover); box-shadow: 0 4px 16px rgba(99,102,241,.35); }
.btn:active:not(:disabled) { transform: scale(0.98); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; box-shadow: none; }

.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-sm);
  margin-top: 0.75rem;
}
.btn-secondary:hover:not(:disabled) { background: var(--border); box-shadow: var(--shadow-sm); }

.btn-danger {
  background: var(--danger);
  box-shadow: 0 2px 8px rgba(229,62,62,.25);
}
.btn-danger:hover:not(:disabled) { background: var(--danger-hover); box-shadow: 0 4px 16px rgba(229,62,62,.35); }

.btn-sm { font-size: 0.875rem; padding: 0.55rem 1rem; margin-top: 0; width: auto; }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  padding: 0 0.75rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
  height: 42px;
  width: auto;
  margin-top: 0;
}
.btn-icon:hover { background: var(--border); color: var(--text); }

/* ── Result card ─────────────────────────────────────────────────────────── */
.result-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.result-header svg { color: var(--success); flex-shrink: 0; }
.result-header-text { font-weight: 700; font-size: 1.05rem; }

.note-info {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.badge {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.22rem 0.65rem;
  border-radius: 20px;
  border: 1px solid;
  white-space: nowrap;
}
.badge-info {
  color: var(--accent);
  border-color: rgba(99,102,241,.3);
  background: var(--accent-light);
}
.badge-warn {
  color: var(--warning);
  border-color: rgba(217,119,6,.3);
  background: rgba(217,119,6,.08);
}

.link-box {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}

.link-input {
  flex: 1;
  min-width: 0;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 0 0.85rem;
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: flex;
  align-items: center;
  height: 42px;
  letter-spacing: -0.02em;
}

.qr-wrapper {
  display: flex;
  justify-content: center;
  padding: 1.25rem 0 0.5rem;
}
.qr-wrapper canvas {
  border-radius: 8px;
  background: white;
  padding: 10px;
  box-shadow: var(--shadow-sm);
}

/* ── View page states ────────────────────────────────────────────────────── */
/* Use :not(.active) so this wins over any display:flex on sibling classes */
.view-state:not(.active) { display: none !important; }
.view-state.active { display: block; }
.view-state.active.state-center { display: flex; }

.state-center {
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0.5rem 0;
}

/* ── Theme toggle icons (CSS-only, no JS style manipulation needed) ───────── */
.icon-sun,
.icon-moon { display: inline-flex; align-items: center; justify-content: center; }
[data-theme="light"] .icon-moon { display: none; }
[data-theme="dark"]  .icon-sun  { display: none; }
/* Fallback when data-theme not yet set (initial paint before theme-init.js) */
html:not([data-theme="dark"]) .icon-moon { display: none; }

/* ── QR canvas ───────────────────────────────────────────────────────────── */
#qrCanvas { display: none; }
#qrCanvas.visible { display: block; }

/* ── Buttons in state panels ─────────────────────────────────────────────── */
.btn-inline { width: auto !important; display: inline-flex !important; margin-top: 1.5rem !important; }
#state-note .btn-inline { margin-top: 1rem !important; }
.note-deleted-notice { margin-top: 1rem; }

.state-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}
.state-icon-warn  { background: rgba(217,119,6,.12);  color: var(--warning); }
.state-icon-info  { background: var(--accent-light);  color: var(--accent);  }
.state-icon-muted { background: var(--surface2);       color: var(--text-muted); }
.state-icon-error { background: var(--danger-light);  color: var(--danger);  }
.state-icon-ok    { background: rgba(56,161,105,.12); color: var(--success); }

.state-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.state-body {
  color: var(--text-muted);
  font-size: 0.925rem;
  line-height: 1.6;
  max-width: 400px;
}

.confirm-actions { width: 100%; margin-top: 1.75rem; }

/* Password form */
.pw-form {
  width: 100%;
  margin-top: 1.5rem;
  text-align: left;
}
.pw-error {
  color: var(--danger);
  font-size: 0.83rem;
  min-height: 1.3em;
  margin-top: 0.4rem;
}

/* Note display */
.note-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}
.note-toolbar-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.note-display {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.1rem;
  font-size: 1rem;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 80px;
  user-select: text;
}

/* Spinner */
.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Toast ───────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--text);
  color: var(--surface);
  padding: 0.55rem 1.1rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  z-index: 200;
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
  box-shadow: var(--shadow);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Footer ──────────────────────────────────────────────────────────────── */
footer {
  margin-top: 2.5rem;
  color: var(--text-muted);
  font-size: 0.78rem;
  text-align: center;
}