/* Audissey: dark-first, Y2K-flavoured. Colors are tokens so light mode is a small override. */
:root,
:root[data-theme="dark"] {
  --bg: #07060d;
  --bg-glow-1: rgba(40, 224, 255, 0.14);
  --bg-glow-2: rgba(255, 79, 195, 0.13);
  --surface: rgba(255, 255, 255, 0.04);
  --surface-border: rgba(255, 255, 255, 0.12);
  --text: #eef0ff;
  --text-dim: #9a9db8;
  --accent: #28e0ff;
  --accent-2: #ff4fc3;
  --btn-text: #07060d;
  --logo-glow: rgba(122, 107, 255, 0.55);
  --scanline: rgba(255, 255, 255, 0.025);
}

:root[data-theme="light"] {
  --bg: #f4f2ff;
  --bg-glow-1: rgba(40, 224, 255, 0.28);
  --bg-glow-2: rgba(255, 79, 195, 0.2);
  --surface: rgba(255, 255, 255, 0.7);
  --surface-border: rgba(30, 20, 80, 0.14);
  --text: #15122b;
  --text-dim: #56597a;
  --accent: #0a9fc0;
  --accent-2: #d12b98;
  --btn-text: #07060d;
  --logo-glow: rgba(122, 107, 255, 0.25);
  --scanline: rgba(0, 0, 0, 0.02);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(60rem 30rem at 15% -5%, var(--bg-glow-1), transparent 70%),
    radial-gradient(50rem 30rem at 95% 10%, var(--bg-glow-2), transparent 70%),
    repeating-linear-gradient(0deg, var(--scanline) 0 1px, transparent 1px 3px);
  background-attachment: fixed;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--surface-border);
}
.site-header nav { display: flex; align-items: center; gap: 1.1rem; }
.site-header nav > a:not(.btn) { text-decoration: none; color: var(--text-dim); font-size: 0.95rem; }
.site-header nav > a:not(.btn):hover { color: var(--text); }
.brand { display: block; line-height: 0; }

/* ---- Logo ---- */
.logo { display: block; line-height: 0; }
.logo svg { width: 100%; height: auto; display: block; overflow: visible; }
.logo-sm { width: 8.5rem; }
.logo-hero { width: min(100%, 44rem); margin: 0 auto 2.2rem; filter: drop-shadow(0 0 18px var(--logo-glow)); }

/* ---- Layout ---- */
main { max-width: 64rem; margin: 0 auto; padding: 0 1rem; }
.section { padding: 4.5rem 0 1rem; }
.section-title {
  margin: 0 0 1.6rem;
  font-size: 0.85rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--accent);
}

/* ---- Hero ---- */
.hero { text-align: center; padding: 4.5rem 0 2rem; }
.eyebrow {
  display: inline-block;
  margin: 0 0 1.8rem;
  padding: 0.3rem 0.9rem;
  border: 1px solid var(--surface-border);
  border-radius: 999px;
  background: var(--surface);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
h1 {
  margin: 0 auto 1rem;
  max-width: 20ch;
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead { margin: 0 auto 2rem; max-width: 40rem; color: var(--text-dim); font-size: 1.1rem; }
.hero-cta { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; }

/* ---- Buttons: glossy Y2K pill ---- */
.btn {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(255,255,255,0.55) 0%, rgba(255,255,255,0) 50%),
              linear-gradient(90deg, var(--accent), var(--accent-2));
  color: var(--btn-text);
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 0 22px -4px var(--accent-2), inset 0 -2px 6px rgba(0,0,0,0.18);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 0 30px -2px var(--accent-2), inset 0 -2px 6px rgba(0,0,0,0.18); }
.btn:disabled { opacity: 0.6; cursor: wait; }
.btn-small { padding: 0.45rem 1.05rem; font-size: 0.9rem; }
.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--surface-border);
  box-shadow: none;
}
.btn-ghost:hover { box-shadow: 0 0 20px -6px var(--accent); }

.theme-toggle {
  width: 2.2rem; height: 2.2rem;
  display: grid; place-items: center;
  border: 1px solid var(--surface-border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
.theme-icon::before { content: "\263E"; font-size: 1.1rem; }               /* moon (dark active) */
:root[data-theme="light"] .theme-icon::before { content: "\2600"; }        /* sun (light active) */

/* ---- Cards ---- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1rem; }
.card {
  padding: 1.5rem;
  border: 1px solid var(--surface-border);
  border-radius: 1.1rem;
  background: var(--surface);
  backdrop-filter: blur(6px);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h3 { margin: 0.4rem 0 0.5rem; font-size: 1.25rem; }
.card p { margin: 0; color: var(--text-dim); }
.card-tag { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.8rem; color: var(--accent-2); }

/* ---- Waitlist form ---- */
.waitlist { max-width: 34rem; margin: 0 auto; text-align: center; }
.waitlist .lead { margin-bottom: 1.8rem; }
.form { text-align: left; padding: 1.6rem; border: 1px solid var(--surface-border); border-radius: 1.2rem; background: var(--surface); }
.field { margin-bottom: 1.1rem; }
label { display: block; margin-bottom: 0.35rem; font-size: 0.9rem; font-weight: 600; }
.optional { font-weight: 400; color: var(--text-dim); }
input[type="email"], textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--surface-border);
  border-radius: 0.7rem;
  background: rgba(0, 0, 0, 0.25);
  color: var(--text);
  font: inherit;
}
:root[data-theme="light"] input[type="email"], :root[data-theme="light"] textarea { background: rgba(255, 255, 255, 0.8); }
input:focus-visible, textarea:focus-visible, .btn:focus-visible, .theme-toggle:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.form .btn { width: 100%; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-status { min-height: 1.5em; margin: 0.9rem 0 0; text-align: center; font-size: 0.95rem; color: var(--text-dim); }
.form-status[data-kind="ok"] { color: #3ddc97; }
.form-status[data-kind="error"] { color: #ff6b81; }

/* ---- Footer ---- */
.site-footer {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  max-width: 64rem; margin: 5rem auto 0; padding: 1.5rem 1rem 2.5rem;
  border-top: 1px solid var(--surface-border);
  color: var(--text-dim); font-size: 0.9rem;
}
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--text); }

/* ---- Small screens ---- */
@media (max-width: 40rem) {
  .site-header nav > a:not(.btn) { display: none; }
  .hero { padding-top: 3rem; }
}

/* ---- Thesis / positioning ---- */
.thesis { max-width: 44rem; margin: 0 auto; text-align: center; }
.thesis-statement {
  margin: 0 0 1.6rem;
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
}
.thesis-statement em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.thesis p:not(.thesis-statement) { margin: 0 0 1rem; color: var(--text-dim); font-size: 1.1rem; }