/* Geekcon AI Studio — shell: reset, valley background, left rail, bottom tabs, view transitions. */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
html, body { margin: 0; min-height: 100%; background: var(--ink-950); color: var(--paper); }
body {
  font: 400 var(--fs-body) / 1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; }
img, svg { display: block; }
[hidden] { display: none !important; }
.num { font-variant-numeric: tabular-nums; }
.mono { font-family: var(--font-mono); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.wrap { overflow-wrap: anywhere; min-width: 0; }
.clamp { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: var(--lines, 2); line-clamp: var(--lines, 2); overflow: hidden; overflow-wrap: anywhere; }
::selection { background: rgba(253, 178, 25, 0.38); color: #fff; }
:focus-visible { outline: 3px solid var(--amber-500); outline-offset: 3px; border-radius: 6px; }

/* ---------- valley background (built by bg.js) ---------- */
.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(1100px 600px at 6% -10%, rgba(253, 178, 25, 0.13), transparent 62%),
    radial-gradient(1300px 800px at 106% 112%, rgba(63, 216, 242, 0.1), transparent 60%),
    linear-gradient(180deg, #0D0B0C 0%, var(--ink-950) 60%);
}
.bg svg { position: absolute; left: 50%; bottom: -6vh; width: max(1700px, 120vw); height: auto; transform: translateX(-50%); }
.bg .contours { transform-origin: 50% 86%; animation: breathe 38s var(--ease-io) infinite alternate; }
.bg .beam { animation: beam 7s ease-in-out infinite; transform-box: fill-box; transform-origin: 50% 100%; }
.bg::after { /* slow amber glint sweeping the lab */
  content: "";
  position: absolute;
  inset: -20% -60%;
  background: linear-gradient(105deg, transparent 42%, rgba(253, 178, 25, 0.05) 49%, rgba(255, 241, 210, 0.07) 50%, rgba(253, 178, 25, 0.05) 51%, transparent 58%);
  animation: glint 16s var(--ease-io) infinite;
}
.bg .grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(63, 216, 242, 0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(63, 216, 242, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 30%, #000 10%, transparent 85%);
  mask-image: radial-gradient(ellipse 70% 55% at 50% 30%, #000 10%, transparent 85%);
}
body:not(.is-gated) .bg svg { opacity: 0.42; }
body:not(.is-gated) .bg::after { opacity: 0.6; }
@keyframes breathe { from { transform: scale(1) translateY(0); } to { transform: scale(1.035) translateY(-12px); } }
@keyframes beam { 0%, 100% { opacity: 0.55; transform: scaleY(0.94); } 50% { opacity: 1; transform: scaleY(1); } }
@keyframes glint { 0% { transform: translateX(-30%); } 60%, 100% { transform: translateX(30%); } }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.45; transform: scale(0.82); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .bg .contours, .bg .beam, .bg::after { animation: none; }
}

/* ---------- shell ---------- */
.shell { position: relative; z-index: 1; min-height: 100vh; display: grid; grid-template-columns: var(--rail-w) minmax(0, 1fr); }
.view { min-width: 0; padding: var(--pad) var(--pad) calc(var(--pad) * 1.6); outline: none; }
.view-inner { max-width: 1640px; margin: 0 auto; }
.view.is-entering .view-inner > * { animation: rise var(--dur-slow) var(--ease-out) both; }
.view.is-entering .view-inner > *:nth-child(2) { animation-delay: 60ms; }
.view.is-entering .view-inner > *:nth-child(3) { animation-delay: 120ms; }
.view.is-entering .view-inner > *:nth-child(n + 4) { animation-delay: 180ms; }
body.is-gated .shell, body.is-gated .tabs { display: none; }

/* ---------- rail ---------- */
.rail {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 16px 18px;
  background: linear-gradient(180deg, rgba(20, 18, 19, 0.86), rgba(11, 10, 11, 0.72));
  border-right: 1px solid var(--line-soft);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
  backdrop-filter: blur(18px) saturate(1.1);
}
.rail-brand { display: flex; align-items: center; gap: 12px; padding: 4px 8px 20px; text-decoration: none; border-radius: var(--r-sm); }
.rail-brand img { width: 58px; height: auto; flex: none; }
.rail-brand b { display: block; font: 500 19px/1.1 var(--font-display); letter-spacing: 0.01em; }
.rail-brand small { display: block; margin-top: 3px; font: 600 11px/1 var(--font-mono); letter-spacing: 0.22em; color: var(--amber-300); text-transform: uppercase; }
.nav { display: grid; gap: 4px; }
.nav a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 48px;
  padding: 0 14px;
  border-radius: 14px;
  text-decoration: none;
  color: var(--dim);
  font: 500 16.5px/1.2 var(--font-display);
  transition: color var(--dur-fast), background-color var(--dur-fast), transform var(--dur-fast);
}
.nav a svg { width: 22px; height: 22px; flex: none; }
.nav a:hover { color: var(--paper); background: rgba(255, 241, 210, 0.05); }
.nav a:active { transform: scale(0.98); }
.nav a[aria-current="page"] { color: var(--amber-300); background: linear-gradient(90deg, rgba(253, 178, 25, 0.16), rgba(253, 178, 25, 0.02)); }
.nav a[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 10px;
  bottom: 10px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--amber-500);
  box-shadow: 0 0 18px var(--amber-500);
}
.nav-sep { height: 1px; margin: 10px 8px; background: var(--line-soft); }
.rail-foot { margin-top: auto; display: grid; gap: 10px; }
.mode-note { padding: 8px 12px; border-radius: 12px; border: 1px dashed rgba(255, 194, 77, 0.5); color: var(--warn); font-size: 12.5px; line-height: 1.45; }

/* budget pill (subtle) */
.budget { display: grid; gap: 7px; padding: 12px 14px; border-radius: 14px; background: rgba(255, 241, 210, 0.035); border: 1px solid var(--line-soft); font-size: 12.5px; color: var(--mute); line-height: 1.35; }
.budget b { color: var(--paper); font-weight: 500; font-variant-numeric: tabular-nums; }
.budget-bar { height: 4px; border-radius: 4px; background: rgba(255, 241, 210, 0.08); overflow: hidden; }
.budget-bar i { display: block; height: 100%; width: 100%; transform-origin: left; transform: scaleX(var(--v, 0)); background: linear-gradient(90deg, var(--cyan-400), var(--amber-500)); transition: transform var(--dur-slow) var(--ease-out); }
.budget.is-closed { border-color: rgba(255, 107, 107, 0.5); color: var(--stop); }

/* me chip */
.me { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 14px; border: 1px solid var(--line-soft); background: rgba(11, 10, 11, 0.5); text-align: left; cursor: pointer; transition: border-color var(--dur-fast), background-color var(--dur-fast); }
.me:hover { border-color: rgba(253, 178, 25, 0.5); background: rgba(253, 178, 25, 0.06); }
.me-body { min-width: 0; display: grid; }
.me-name { font: 500 15px/1.25 var(--font-display); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.me-meta { font-size: 12.5px; color: var(--mute); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.avatar {
  display: grid;
  place-items: center;
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font: 500 16px/1 var(--font-display);
  color: var(--ink-950);
  background: radial-gradient(circle at 34% 28%, #fff 0%, var(--dc, var(--amber-500)) 62%);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--dc, var(--amber-500)) 22%, transparent), 0 0 18px color-mix(in srgb, var(--dc, var(--amber-500)) 40%, transparent);
}
.avatar.sm { width: 30px; height: 30px; font-size: 13px; }

/* ---------- phone bottom tabs ---------- */
.tabs { display: none; }

/* ---------- toasts ---------- */
.toasts { position: fixed; z-index: 60; right: 20px; bottom: 20px; display: grid; gap: 10px; justify-items: end; pointer-events: none; }
.toast {
  max-width: min(440px, calc(100vw - 32px));
  padding: 13px 18px;
  border-radius: 14px;
  background: rgba(20, 18, 19, 0.96);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lift);
  font-size: 15px;
  animation: rise var(--dur) var(--ease-out) both;
}
.toast.ok { border-color: rgba(91, 227, 164, 0.6); }
.toast.err { border-color: rgba(255, 107, 107, 0.7); }
.toast.out { opacity: 0; transform: translateY(8px); transition: opacity var(--dur), transform var(--dur); }

/* ---------- responsive shell ---------- */
@media (max-width: 1279px) {
  :root { --rail-w: 84px; }
  .rail { padding: 18px 10px; align-items: center; }
  .rail-brand { padding: 0 0 14px; }
  .rail-brand img { width: 52px; }
  .rail-brand div, .nav a span, .budget, .me-body, .mode-note { display: none; }
  .nav a { width: 58px; justify-content: center; padding: 0; }
  .nav a[aria-current="page"]::before { left: -10px; }
  .me { padding: 8px; border: 0; background: transparent; }
}