/* base.css — reset, typography, layout primitives */

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

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: 'Geist', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  font-feature-settings: "tnum", "ss01";
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg);
  color: var(--fg);
  transition: background .25s ease, color .25s ease;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
}

img, svg { display: block; max-width: 100%; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection { background: var(--accent); color: var(--bg); }

/* App shell */
.app {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

/* Top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -.02em;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid;
  place-items: center;
  color: white;
  font-weight: 800;
  font-size: 14px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--fg);
  transition: background .15s ease, transform .15s ease;
}
.icon-btn:hover { background: var(--bg-2); }
.icon-btn:active { transform: scale(.95); }
.icon-btn svg { width: 18px; height: 18px; }

.mode-pills {
  display: inline-flex;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}
.mode-pill {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--fg-2);
  transition: all .15s ease;
}
.mode-pill.active {
  background: var(--accent);
  color: white;
}
.mode-pill:not(.active):hover { color: var(--fg); }

/* Main content */
.main {
  padding: 24px 20px 40px;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

/* Footer */
.footer {
  padding: 12px 20px;
  text-align: center;
  font-size: 12px;
  color: var(--fg-3);
  border-top: 1px solid var(--border);
}

/* Card */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--fg);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: background .15s ease, transform .12s ease, border-color .15s ease;
}
.btn:hover { background: var(--bg-3); border-color: var(--border-strong); }
.btn:active { transform: scale(.97); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 8px 24px -8px var(--accent-shadow);
}
.btn-primary:hover {
  background: var(--accent-hi);
  border-color: var(--accent-hi);
}
.btn-ghost {
  background: transparent;
  border-color: transparent;
}
.btn-ghost:hover { background: var(--bg-2); }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-icon { width: 36px; padding: 0; }

/* Inputs */
.input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font-size: 15px;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.select {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
}

/* Pill */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--fg-2);
  user-select: none;
}
.pill input[type="checkbox"] { margin: 0; accent-color: var(--accent); }

/* Toggle chip (modifier buttons) */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-2);
  cursor: pointer;
  transition: all .15s ease;
}
.chip:hover { border-color: var(--border-strong); color: var(--fg); }
.chip.active {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}

/* Utility */
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.col { display: flex; flex-direction: column; gap: 8px; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.center { display: grid; place-items: center; }
.muted { color: var(--fg-3); }
.tiny { font-size: 11px; }
.small { font-size: 12px; }
.mono { font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace; }
.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Animations */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}
.shake { animation: shake .35s ease; }

@keyframes pop {
  0% { transform: scale(.9); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
.pop { animation: pop .2s ease; }

@keyframes fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fade-in .25s ease; }

@keyframes slide-up {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}
@keyframes slide-down {
  from { transform: translateY(0); }
  to { transform: translateY(100%); }
}

@keyframes pulse-caret {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}

/* Mobile */
@media (max-width: 720px) {
  .topbar { padding: 10px 14px; }
  .brand { font-size: 16px; }
  .main { padding: 16px 12px 80px; }
  .mode-pill { padding: 5px 10px; font-size: 12px; }
}