/* FuturizeIA Fitness — installer landing. Dark-first, purple/blue circuit. */
:root {
  --bg: #0a0a12;
  --bg-2: #10101d;
  --panel: #16162a;
  --panel-2: #1d1d36;
  --border: #2a2a44;
  --text: #f2f2f7;
  --muted: #a3a3c2;
  --accent: #7c3aed;
  --accent-2: #3b82f6;
  --accent-grad: linear-gradient(135deg, #7c3aed 0%, #3b82f6 100%);
  --ok: #22c55e;
  --err: #f87171;
  --warn: #f59e0b;
  --radius: 16px;
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
[data-theme="light"] {
  --bg: #f6f6fb;
  --bg-2: #ffffff;
  --panel: #ffffff;
  --panel-2: #f0f0f8;
  --border: #e2e2ee;
  --text: #16162a;
  --muted: #5b5b78;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(124,58,237,0.18), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(59,130,246,0.14), transparent 55%),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5rem; }
p { margin: 0 0 1rem; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.sr-only, .skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; background: var(--panel); padding: 10px 14px; border-radius: 10px; z-index: 20; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 12px 20px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { width: 34px; height: 34px; border-radius: 9px; object-fit: cover; }
.brand-name { font-weight: 700; letter-spacing: -.01em; }
.header-controls { display: flex; align-items: center; gap: 10px; }
.lang-select {
  background: var(--panel); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; padding: 8px 10px; font: inherit; font-size: 14px; cursor: pointer;
}
.theme-toggle {
  background: var(--panel); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; width: 40px; height: 38px; cursor: pointer; font-size: 18px;
}
.theme-toggle:hover, .lang-select:hover { border-color: var(--accent); }

/* shared */
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--accent-2);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 14px;
}
.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 28px;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
  padding: 13px 22px; border-radius: 12px; border: 1px solid transparent; transition: .18s;
}
.btn-primary { background: var(--accent-grad); color: #fff; box-shadow: 0 8px 24px rgba(124,58,237,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(124,58,237,.45); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); }
.btn-block { width: 100%; margin-top: 12px; }

/* hero */
.hero { padding: 72px 0 40px; text-align: center; }
.hero-title { font-size: clamp(30px, 5.5vw, 52px); letter-spacing: -.02em; max-width: 18ch; margin: 0 auto .6rem; }
.hero-sub { color: var(--muted); font-size: clamp(16px, 2.2vw, 19px); max-width: 60ch; margin: 0 auto 1.6rem; }
.hero-cta { font-size: 17px; }

/* community */
.community { padding: 24px 0 40px; }
.community .card { text-align: center; }
.flow {
  list-style: none; padding: 0; margin: 18px auto; display: flex; flex-wrap: wrap;
  gap: 10px; justify-content: center; max-width: 640px;
}
.flow li {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 999px;
  padding: 8px 16px; font-size: 14px; color: var(--muted);
}

/* steps */
.step { padding: 34px 0; border-top: 1px solid var(--border); }
.step-head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.lock-badge {
  font-size: 12px; color: var(--warn); border: 1px solid var(--warn);
  border-radius: 999px; padding: 4px 12px;
}
.step-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.card-wide { max-width: 620px; }

/* video placeholder */
.video-frame {
  aspect-ratio: 16 / 9; border-radius: 14px; border: 1px dashed var(--border);
  background:
    repeating-linear-gradient(45deg, rgba(124,58,237,.05) 0 12px, transparent 12px 24px),
    var(--panel);
  display: flex; align-items: center; justify-content: center; text-align: center;
  color: var(--muted); font-size: 14px; padding: 16px; margin-bottom: 14px;
}
.video-col p { color: var(--muted); }

/* forms */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.field input {
  width: 100%; background: var(--bg-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 11px; padding: 12px 14px; font: inherit;
}
.field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124,58,237,.25); }
.field input.invalid { border-color: var(--err); }
.hint { display: block; color: var(--muted); font-size: 13px; margin-top: 5px; }
.err { display: block; color: var(--err); font-size: 13px; margin-top: 5px; min-height: 1em; }
.success { color: var(--ok); font-weight: 600; margin-top: 12px; }
.disclaimer { color: var(--muted); font-size: 13px; }

/* plans + coupon */
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 14px; }
.plan {
  border: 1px solid var(--border); border-radius: 12px; padding: 16px; background: var(--panel-2);
  display: flex; flex-direction: column; gap: 4px;
}
.plan strong { font-size: 18px; }
.plan span { color: var(--muted); font-size: 14px; }
.plan-hi { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.warn { color: var(--warn); font-size: 14px; }
.coupon { display: flex; align-items: center; gap: 10px; margin: 12px 0; font-size: 14px; color: var(--muted); }
.coupon code {
  font-size: 16px; font-weight: 700; letter-spacing: .1em; color: var(--text);
  background: var(--panel-2); border: 1px dashed var(--accent); border-radius: 8px; padding: 6px 14px;
}

/* install status */
.install-status { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--border); }
.install-status h3 { color: var(--ok); }

/* locked state */
.step.locked .step-grid,
.step.locked .card-wide { opacity: .4; pointer-events: none; filter: grayscale(.4); }
.step:not(.locked) .lock-badge { display: none; }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0; text-align: center; color: var(--muted); font-size: 14px; }
.muted { color: var(--muted); }

/* responsive */
@media (max-width: 760px) {
  .step-grid { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 28px; }
  .card { padding: 20px; }
}