/* ============================================
   JWT Builder Online
   Dark-first design with JWT-colored segments
   ============================================ */

:root {
  --bg-primary: #0b0b10;
  --bg-secondary: #111118;
  --bg-tertiary: #18181f;
  --bg-card: rgba(20, 20, 28, 0.9);
  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(255, 255, 255, 0.14);
  --text-primary: #f0f0f3;
  --text-secondary: #8a8a97;
  --text-muted: #50505a;
  --header-color: #fb015b;
  --payload-color: #d63aff;
  --signature-color: #00b9f1;
  --accent: #818cf8;
  --accent-dim: rgba(129, 140, 248, 0.12);
  --accent-glow: rgba(129, 140, 248, 0.2);
  --green: #22c55e;
  --green-dim: rgba(34, 197, 94, 0.12);
  --red: #ef4444;
  --red-dim: rgba(239, 68, 68, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition: 0.2s ease;
}

[data-theme="light"] {
  --bg-primary: #f5f5f8;
  --bg-secondary: #ffffff;
  --bg-tertiary: #eeeef2;
  --bg-card: rgba(255, 255, 255, 0.95);
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  --text-primary: #111118;
  --text-secondary: #555566;
  --text-muted: #888899;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

/* App */
.app {
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.header { margin-bottom: 28px; }

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

.logo { display: flex; align-items: center; gap: 14px; }

.logo-icon { color: var(--accent); }

.logo h1 {
  font-size: 1.4rem; font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--header-color), var(--payload-color), var(--signature-color));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline { font-size: 0.82rem; color: var(--text-secondary); margin-top: 2px; }

.theme-toggle {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition);
  font-size: 1rem;
}

.theme-toggle:hover { border-color: var(--border-hover); }

/* Main Grid */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  flex: 1;
}

/* Panel */
.panel {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.section-title {
  font-size: 0.8rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

/* Color Classes */
.header-color { color: var(--header-color); }
.payload-color { color: var(--payload-color); }

/* Builder Panel */
.builder-panel { display: flex; flex-direction: column; gap: 18px; }

.builder-header { border-bottom: 1px solid var(--border); padding-bottom: 16px; }

.field-row { display: flex; gap: 12px; flex-wrap: wrap; }

.field-group { display: flex; flex-direction: column; gap: 4px; }
.field-group.flex-1 { flex: 1; min-width: 200px; }

.field-label {
  font-size: 0.7rem; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--text-muted);
}

.field-input, .field-select {
  font-family: var(--font);
  font-size: 0.85rem;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  transition: border-color var(--transition);
}

.field-input:focus, .field-select:focus {
  outline: none; border-color: var(--accent);
}

.field-input.mono { font-family: var(--mono); font-size: 0.8rem; }

.field-select {
  appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%238a8a97' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.secret-row { display: flex; gap: 6px; }
.secret-row .field-input { flex: 1; }

.icon-btn {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all var(--transition);
  color: var(--text-secondary);
}

.icon-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }

/* Editor */
.editor-section {}

.editor-title-row {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 8px;
}

.badge {
  font-size: 0.6rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 100px;
}

.header-badge { background: rgba(251, 1, 91, 0.12); color: var(--header-color); }
.payload-badge { background: rgba(214, 58, 255, 0.12); color: var(--payload-color); }

.code-editor {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.7;
  padding: 14px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  min-height: 100px;
  white-space: pre-wrap;
  word-break: break-word;
  outline: none;
  transition: border-color var(--transition);
  tab-size: 2;
}

.code-editor:focus { border-color: var(--accent); }

/* Quick Claims */
.quick-claims {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 8px;
}

.claim-btn {
  font-family: var(--mono);
  font-size: 0.7rem; font-weight: 500;
  padding: 4px 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--payload-color);
  cursor: pointer;
  transition: all var(--transition);
}

.claim-btn:hover { border-color: var(--payload-color); background: rgba(214, 58, 255, 0.08); }

/* Actions */
.builder-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.btn {
  font-family: var(--font);
  font-size: 0.82rem; font-weight: 600;
  padding: 10px 18px;
  border: none; border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex; align-items: center; gap: 6px;
  transition: all var(--transition);
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(135deg, var(--header-color), var(--payload-color));
  color: #fff;
}

.btn-primary:hover { box-shadow: 0 0 20px rgba(214, 58, 255, 0.25); }

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary:hover { border-color: var(--border-hover); color: var(--text-primary); }

.btn-sm { font-size: 0.75rem; padding: 6px 12px; }

/* Output Panel */
.output-panel { display: flex; flex-direction: column; gap: 16px; }

.output-header { display: flex; justify-content: space-between; align-items: center; }

.output-actions { display: flex; gap: 6px; }

/* Token Display */
.token-display {
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.8;
  padding: 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  word-break: break-all;
  min-height: 80px;
}

.token-header { color: var(--header-color); }
.token-payload { color: var(--payload-color); }
.token-signature { color: var(--signature-color); }

/* Verify Badge */
.verify-badge {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem; font-weight: 500;
}

.verify-badge.valid { background: var(--green-dim); color: var(--green); }
.verify-badge.invalid { background: var(--red-dim); color: var(--red); }

/* Decoded Section */
.decoded-section { display: flex; flex-direction: column; gap: 12px; }

.decoded-block {}

.decoded-label {
  font-size: 0.7rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.decoded-json {
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.7;
  padding: 12px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  color: var(--text-primary);
  margin: 0;
}

/* Claim Analysis */
.claim-info { margin-top: 4px; }

.claim-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
  font-size: 0.78rem;
}

.claim-grid .claim-key { color: var(--text-muted); font-family: var(--mono); font-size: 0.72rem; }
.claim-grid .claim-val { color: var(--text-primary); }
.claim-grid .claim-val.expired { color: var(--red); }
.claim-grid .claim-val.valid { color: var(--green); }

/* Decode Input */
.decode-input-section { display: flex; flex-direction: column; gap: 10px; }

/* Shortcuts */
.shortcuts-section {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.shortcuts-title {
  font-size: 0.68rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.shortcut-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
  font-size: 0.72rem;
  color: var(--text-muted);
}

kbd {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.65rem;
  padding: 1px 5px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
}

/* History Panel */
.history-panel { margin-top: 24px; }

.history-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}

.history-list { display: flex; flex-direction: column; gap: 8px; }

.history-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color var(--transition);
}

.history-item:hover { border-color: var(--border-hover); }

.history-time {
  font-family: var(--font);
  font-size: 0.68rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* Footer */
.footer {
  margin-top: 48px; padding: 24px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p { font-size: 0.75rem; color: var(--text-muted); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 100px; }

/* Responsive */
@media (max-width: 860px) {
  .main-grid { grid-template-columns: 1fr; }
}

@media (max-width: 500px) {
  .app { padding: 16px 12px; }
  .field-row { flex-direction: column; }
  .builder-actions { flex-direction: column; }
  .builder-actions .btn { width: 100%; justify-content: center; }
}