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

:root,
[data-theme="light"] {
  --bg: #e8e6e1;
  --surface: #f5f4f1;
  --surface-raised: #ffffff;
  --surface-inset: #eeede9;
  --border: #d0cdc5;
  --border-subtle: #e3e1db;
  --text: #141310;
  --text-secondary: #45433d;
  --text-muted: #76736b;
  --accent: #1680b0;
  --accent-hover: #0f6d97;
  --accent-soft: #dceef6;
  --accent-border: #a8d4ea;
  --accent-glow: rgba(22, 128, 176, 0.14);
  --copy-bg: #1680b0;
  --copy-hover: #0f6d97;
  --paste-bg: #e4f2f9;
  --paste-text: #0d6288;
  --paste-border: #9dcee8;
  --success: #1a6b40;
  --warning: #8a6218;
  --error: #b03030;
  --shadow-sm: 0 1px 2px rgba(20, 19, 16, 0.06);
  --shadow-md: 0 4px 20px rgba(20, 19, 16, 0.07);
  --code-bg: #ffffff;
}

[data-theme="dark"] {
  --bg: #0e0e0d;
  --surface: #171716;
  --surface-raised: #1f1f1d;
  --surface-inset: #131312;
  --border: #333330;
  --border-subtle: #282826;
  --text: #ededea;
  --text-secondary: #a9a7a0;
  --text-muted: #666460;
  --accent: #45b8db;
  --accent-hover: #35a5c8;
  --accent-soft: #1a2e36;
  --accent-border: #2a5566;
  --accent-glow: rgba(69, 184, 219, 0.08);
  --copy-bg: #2a9fc4;
  --copy-hover: #238eb0;
  --paste-bg: #1a3039;
  --paste-text: #6ec8e8;
  --paste-border: #2a5566;
  --success: #45b87a;
  --warning: #d4a843;
  --error: #e05555;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.35);
  --code-bg: #141413;
}

:root {
  --radius: 10px;
  --radius-sm: 7px;
  --font: system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "SF Mono", "Cascadia Code", Consolas, monospace;
}

html { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s, color 0.25s;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 2rem;
}

/* ── Header ── */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.1rem;
  margin-bottom: 1rem;
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.logo {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--text);
  white-space: nowrap;
}

.logo-tg {
  color: var(--accent);
  font-weight: 700;
}

/* Theme switch */

.theme-switch {
  display: flex;
  padding: 3px;
  background: var(--surface-inset);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  gap: 2px;
}

.theme-opt {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.36rem 0.62rem;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.18s, color 0.18s, box-shadow 0.18s;
  white-space: nowrap;
}

.theme-opt:hover:not(.active) {
  color: var(--text-secondary);
}

.theme-opt.active {
  background: var(--surface-raised);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .theme-opt.active {
  background: var(--border);
}

/* ── Tabs ── */

.provider-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.4rem;
  margin-bottom: 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.5rem 0.95rem;
  border: 1.5px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}

.tab:hover:not(.active):not(:disabled) {
  color: var(--text-secondary);
  background: var(--surface-inset);
  border-color: var(--border-subtle);
}

.tab.active {
  color: var(--text);
  font-weight: 600;
  background: var(--surface-raised);
  border-color: var(--accent-border);
  box-shadow: 0 2px 10px var(--accent-glow);
}

.tab:disabled,
.tab[data-coming-soon="true"] {
  opacity: 0.42;
  cursor: not-allowed;
}

.tab-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 4px;
  background: var(--surface-inset);
  flex-shrink: 0;
  transition: background 0.15s;
}

.tab.active .tab-icon-wrap {
  background: var(--accent-soft);
}

.tab-icon {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  object-fit: contain;
}

.tab-name {
  line-height: 1;
}

/* ── Panels ── */

.workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

@media (max-width: 780px) {
  .workspace { grid-template-columns: 1fr; }
  .header { flex-wrap: wrap; }
}

.panel {
  display: flex;
  flex-direction: column;
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.panel-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border-subtle);
}

.panel-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ── Action buttons ── */

.btn-highlight {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, box-shadow 0.15s, opacity 0.15s;
}

.btn-highlight:active:not(:disabled) {
  transform: scale(0.97);
}

.btn-paste {
  background: var(--paste-bg);
  color: var(--paste-text);
  border: 1.5px solid var(--paste-border);
}

.btn-paste:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.btn-paste:hover:not(:disabled) {
  background: var(--accent-soft);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn-copy {
  background: var(--copy-bg);
  color: #fff;
  border: 1.5px solid transparent;
  box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-copy:hover:not(:disabled) {
  background: var(--copy-hover);
  box-shadow: 0 2px 12px var(--accent-glow);
}

.btn-copy:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-muted {
  font-family: var(--font);
  font-size: 0.76rem;
  font-weight: 500;
  padding: 0.45rem 0.65rem;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}

.btn-muted:hover {
  color: var(--text);
  background: var(--surface-inset);
}

textarea {
  flex: 1;
  min-height: 420px;
  padding: 0.9rem 1rem;
  border: none;
  background: var(--code-bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.79rem;
  line-height: 1.7;
  resize: vertical;
  outline: none;
}

textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.65;
}

.status {
  padding: 0.45rem 0.8rem 0.6rem;
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  min-height: 1.65rem;
}

.status.success { color: var(--success); }
.status.error   { color: var(--error); }
.status.warning { color: var(--warning); }