:root {
  --bg: #0b0a12;
  --bg-elevated: #15131f;
  --bg-card: #1a1726;
  --ink: #f3f1fa;
  --ink-dim: #9b93b5;
  --border: #2a2638;
  --accent: #7c5cff;
  --accent-ink: #ffffff;
  --accent-soft: #241f3d;
  --warn: #ffb454;
  --error: #ff6b7a;
  --success: #30d9ac;
  --focus: #9b8bff;
  --shadow: 0 20px 60px -30px rgba(0, 0, 0, 0.7);
  --radius: 14px;
  --font-display: 'Sora', ui-sans-serif, system-ui, sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, sans-serif;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #f7f6fb;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --ink: #1b1830;
  --ink-dim: #65607d;
  --border: #e3e0ef;
  --accent: #6a3dff;
  --accent-soft: #ece7ff;
  --shadow: 0 16px 40px -24px rgba(30, 20, 60, 0.25);
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}

body {
  font-family: var(--font-body);
  min-height: 100svh;
  line-height: 1.5;
  transition: background 0.3s ease, color 0.3s ease;
}

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 0.4em;
}

p { margin: 0 0 1em; color: var(--ink-dim); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
}

.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;
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
}
.brand .spark {
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 3px;
  box-shadow: 0 0 16px 2px var(--accent);
  display: inline-block;
}
.nav-links { display: flex; align-items: center; gap: 18px; font-size: 0.92rem; flex-wrap: wrap; }
.nav-links a { color: var(--ink-dim); }
.nav-links a:hover { color: var(--ink); }

/* Buttons */
.btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 11px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.15s ease, border-color 0.15s ease;
  text-decoration: none;
}
.btn:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 24px -10px var(--accent); text-decoration: none; }
.btn-secondary { background: var(--bg-card); color: var(--ink); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--accent); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--ink-dim); }
.btn-ghost:hover { color: var(--ink); text-decoration: none; }
.btn-danger { background: var(--error); color: #2b0a0e; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-block { width: 100%; }
.btn-sm { padding: 7px 12px; font-size: 0.82rem; }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(18px, 3vw, 28px);
  box-shadow: var(--shadow);
}

/* Forms */
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 0.82rem;
  color: var(--ink-dim);
  margin-bottom: 6px;
}
.field input[type="text"],
.field input[type="email"],
.field input[type="password"],
.field select,
.field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 11px 13px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--ink);
}
.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}
.field-error {
  color: var(--error);
  font-size: 0.8rem;
  margin-top: 6px;
}
.form-error-banner {
  background: color-mix(in srgb, var(--error) 15%, var(--bg-card));
  border: 1px solid var(--error);
  color: var(--ink);
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 0.88rem;
  margin-bottom: 16px;
}
.form-success-banner {
  background: color-mix(in srgb, var(--success) 15%, var(--bg-card));
  border: 1px solid var(--success);
  color: var(--ink);
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 0.88rem;
  margin-bottom: 16px;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}
.badge.free { background: var(--bg-elevated); color: var(--ink-dim); border: 1px solid var(--border); }
.badge.warn { background: color-mix(in srgb, var(--warn) 20%, transparent); color: var(--warn); }

/* Theme toggle */
.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--ink-dim);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.8rem;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); }
.theme-toggle:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* Empty / loading / error states */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--ink-dim);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}
.empty-state .icon { font-size: 2rem; margin-bottom: 10px; }
.spinner {
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast */
.toast {
  position: fixed;
  bottom: 20px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.82rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

footer.site-footer {
  margin-top: 48px;
  padding: 28px 0 40px;
  color: var(--ink-dim);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}
footer.site-footer .links { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 10px; }

@media (prefers-reduced-motion: reduce) {
  .btn, .theme-toggle, .toast, .spinner { transition: none; animation: none; }
}