:root {
  --bg: radial-gradient(circle at top, #f5f5f7 0, #e5e7eb 40%, #d1d5db 100%);
  --text: #111827;
  --text-muted: #6b7280;
  --card-bg: rgba(255, 255, 255, 0.96);
  --border: rgba(148, 163, 184, 0.5);
  --accent: #f5c76a;
  --accent-soft: rgba(245, 199, 106, 0.16);
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.18);
}

[data-theme="dark"] {
  --bg: radial-gradient(circle at top, #111827 0, #020617 45%, #02010a 100%);
  --text: #e5e7eb;
  --text-muted: #9ca3af;
  --card-bg: rgba(15, 23, 42, 0.96);
  --border: rgba(148, 163, 184, 0.4);
  --accent: #f5c76a;
  --accent-soft: rgba(245, 199, 106, 0.18);
  --shadow: 0 26px 70px rgba(0, 0, 0, 0.7);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

/* Theme toggle */
.theme-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 50;
}

.theme-switch-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.04);
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  backdrop-filter: blur(12px);
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-switch-btn:hover {
  background: rgba(15, 23, 42, 0.08);
  transform: translateY(-1px);
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.25);
}

/* Hero */
.hero {
  padding: 32px 4px 18px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.04);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-title {
  margin: 14px 0 8px;
  font-size: 30px;
  letter-spacing: 0.04em;
}

.hero-subtitle {
  margin: 0;
  max-width: 640px;
  font-size: 13px;
  color: var(--text-muted);
}

/* Main card */
.main-card {
  margin-top: 10px;
  background: var(--card-bg);
  border-radius: 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 20px 16px 22px;
  backdrop-filter: blur(20px);
}

@media (min-width: 768px) {
  .main-card {
    padding: 24px 24px 26px;
  }
}

/* Tabs */
.tabs {
  display: flex;
  gap: 8px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.04);
  border: 1px solid var(--border);
  margin-bottom: 18px;
}

.tab {
  flex: 1;
  border-radius: 999px;
  border: none;
  padding: 9px 10px;
  font-size: 13px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.tab.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
  transform: translateY(-1px);
}

.tab:hover {
  background: rgba(15, 23, 42, 0.06);
}

/* Panels */
.tab-panels {
  margin-top: 6px;
}

.tab-panel {
  display: none;
  animation: fadeIn 0.18s ease-out;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Section header */
.section-header h2 {
  margin: 0 0 4px;
  font-size: 18px;
}

.section-header p {
  margin: 0 0 12px;
  font-size: 12px;
  color: var(--text-muted);
}

/* Inputs */
.input-area {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.02);
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text);
  resize: vertical;
  min-height: 80px;
  outline: none;
  transition: border 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.input-area:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(245, 199, 106, 0.4);
  background: rgba(15, 23, 42, 0.02);
}

/* Fields */
.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

@media (max-width: 640px) {
  .field-grid {
    grid-template-columns: 1fr;
  }
}

.field label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.field select,
.field input[type="color"],
.field input[type="range"] {
  width: 100%;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.02);
  padding: 6px 10px;
  font-size: 12px;
  color: var(--text);
  outline: none;
  transition: border 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.field input[type="range"] {
  padding: 0;
}

.field select:focus,
.field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(245, 199, 106, 0.4);
}

/* Buttons */
.actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
  margin-bottom: 10px;
}

.btn {
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 8px 14px;
  font-size: 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #f5c76a, #f59e0b);
  color: #111827;
  font-weight: 500;
  box-shadow: 0 14px 30px rgba(245, 158, 11, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(245, 158, 11, 0.45);
}

.btn-ghost {
  background: rgba(15, 23, 42, 0.02);
  border-color: var(--border);
  color: var(--text-muted);
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.06);
}

/* Unicode results */
.unicode-results {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.unicode-card {
  border-radius: 14px;
  border: 1px solid var(--border);
  background: radial-gradient(circle at top left, rgba(248, 250, 252, 0.06), rgba(15, 23, 42, 0.02));
  padding: 10px 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.unicode-style-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
}

.unicode-output {
  font-size: 16px;
  word-break: break-word;
}

.unicode-card .btn {
  align-self: flex-end;
  margin-top: 4px;
}

/* Canvas */
.canvas-wrapper {
  margin-top: 14px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: radial-gradient(circle at top left, rgba(248, 250, 252, 0.06), rgba(15, 23, 42, 0.02));
  padding: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: auto;
}

canvas {
  max-width: 100%;
  height: auto;
}

/* Footer */
.footer {
  margin-top: auto;
  padding: 18px 16px 24px;
  font-size: 11px;
  color: var(--text-muted);
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-inner a {
  color: var(--accent);
  text-decoration: none;
}

.footer-inner a:hover {
  text-decoration: underline;
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}