/* 10x Development — shared styles
   Common foundation used by every page: theme variables, reset, base
   layout, the card container, and buttons. Page-specific rules stay in
   each page's own <style> block. */

:root {
  --bg: #f7f8fa;
  --panel: #ffffff;
  --text: #10131a;
  --muted: #5b6472;
  --accent: #2f6df6;
  --border: #e6e9ef;
  --shadow: 0 20px 60px rgba(16, 19, 26, 0.08);
  --term-green: #16a34a;
  --field: #ffffff;
  --ok: #16a34a;
  --err: #dc2626;
  /* AI-style mesh gradient blobs (prominent on light) */
  --g1: rgba(124, 58, 237, 0.22);
  --g2: rgba(56, 132, 255, 0.22);
  --g3: rgba(236, 72, 153, 0.18);
  --g4: rgba(6, 182, 212, 0.18);
}
/* Explicit user choice wins */
:root[data-theme="dark"] {
  --bg: #0c0e13;
  --panel: #14171f;
  --text: #f2f4f8;
  --muted: #9aa4b2;
  --accent: #5b8bff;
  --border: #232734;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  --term-green: #4ade80;
  --field: #0f1218;
  --ok: #4ade80;
  --err: #f87171;
  /* AI-style mesh gradient blobs (richer aurora on dark) */
  --g1: rgba(139, 92, 246, 0.24);
  --g2: rgba(56, 132, 255, 0.20);
  --g3: rgba(236, 72, 153, 0.18);
  --g4: rgba(34, 211, 238, 0.16);
}
/* No explicit choice → follow the OS */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0c0e13;
    --panel: #14171f;
    --text: #f2f4f8;
    --muted: #9aa4b2;
    --accent: #5b8bff;
    --border: #232734;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    --term-green: #4ade80;
    --field: #0f1218;
    --ok: #4ade80;
    --err: #f87171;
    /* AI-style mesh gradient blobs (richer aurora on dark) */
    --g1: rgba(139, 92, 246, 0.24);
    --g2: rgba(56, 132, 255, 0.20);
    --g3: rgba(236, 72, 153, 0.18);
    --g4: rgba(34, 211, 238, 0.16);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  -webkit-font-smoothing: antialiased;
}

/* AI-style mesh gradient: a fixed, viewport-anchored layer behind everything.
   Sits above body's solid background but behind all content (z-index: -1). */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(55vw 55vw at 8% -5%, var(--g1), transparent 60%),
    radial-gradient(50vw 50vw at 98% 8%, var(--g2), transparent 60%),
    radial-gradient(50vw 50vw at 92% 100%, var(--g3), transparent 60%),
    radial-gradient(45vw 45vw at 0% 95%, var(--g4), transparent 60%);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  max-width: 520px;
  width: 100%;
  padding: 48px 40px;
  text-align: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  padding: 14px 26px;
  border-radius: 12px;
  transition: transform 0.12s ease, box-shadow 0.12s ease, opacity 0.12s ease;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 35%, transparent);
}
.btn:hover { transform: translateY(-2px); opacity: 0.95; }
.btn:active { transform: translateY(0); }
.btn svg { width: 20px; height: 20px; fill: currentColor; }

.btn.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
}
.btn.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 12px;
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 18px;
}
.back:hover { color: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
  .btn:hover { transform: none; }
}