:root {
  --bg: #0a0a0c;
  --bg-soft: #131418;
  --card: #17191e;
  --border: rgba(255, 255, 255, 0.06);
  --text: #f3f3f5;
  --text-dim: #8c8d92;
  --orange: #ff6a00;
  --orange-soft: #ff8a3d;
  --error: #ff5151;
  --radius: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a { color: var(--orange); text-decoration: none; }
a:hover { color: var(--orange-soft); }

/* Layout */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 420px; margin: 0 auto; padding: 0 24px; }

/* Header */
.header {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; backdrop-filter: blur(14px);
  background: rgba(10, 10, 12, 0.75);
  z-index: 10;
}
.header-row { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 18px; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px; background: #1a1a1f;
  display: flex; align-items: center; justify-content: center;
}
.brand-mark svg { width: 22px; height: 22px; }
.nav { display: flex; gap: 8px; align-items: center; }
.nav a { color: var(--text-dim); padding: 8px 14px; border-radius: 10px; font-weight: 500; }
.nav a:hover { color: var(--text); background: rgba(255,255,255,0.04); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 12px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: 0.15s ease;
  text-decoration: none;
}
.btn-primary {
  background: var(--orange); color: white;
  box-shadow: 0 8px 24px rgba(255, 106, 0, 0.25);
}
.btn-primary:hover { background: var(--orange-soft); color: white; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: rgba(255,255,255,0.04); }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* Hero */
.hero { padding: 80px 0 60px; text-align: center; }
.hero h1 {
  font-size: 56px; line-height: 1.05; letter-spacing: -0.02em;
  font-weight: 800; margin-bottom: 20px;
}
.hero h1 .accent { color: var(--orange); }
.hero p {
  font-size: 19px; color: var(--text-dim);
  max-width: 580px; margin: 0 auto 36px; line-height: 1.5;
}
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Features grid */
.features {
  display: grid; gap: 18px; padding: 40px 0 80px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.feature {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; transition: 0.2s ease;
}
.feature:hover { border-color: rgba(255, 106, 0, 0.4); transform: translateY(-2px); }
.feature-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: rgba(255, 106, 0, 0.12); color: var(--orange);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px; font-size: 20px;
}
.feature h3 { font-size: 18px; margin-bottom: 8px; }
.feature p { color: var(--text-dim); font-size: 14px; line-height: 1.55; }

/* Auth card */
.auth-shell { min-height: calc(100vh - 90px); display: flex; align-items: center; padding: 40px 0; }
.auth-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 20px;
  padding: 36px 32px; width: 100%;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
}
.auth-card h1 {
  font-size: 26px; font-weight: 800; margin-bottom: 8px; text-align: center;
}
.auth-card .subtitle { color: var(--text-dim); text-align: center; margin-bottom: 28px; font-size: 14px; }

/* Form */
.field { margin-bottom: 14px; }
.field label {
  display: block; font-size: 13px; color: var(--text-dim);
  margin-bottom: 6px; font-weight: 500;
}
.input {
  width: 100%; padding: 12px 14px; border-radius: 11px;
  background: var(--bg-soft); border: 1px solid var(--border);
  color: var(--text); font-size: 15px; transition: 0.15s ease;
  font-family: inherit;
}
.input:focus { outline: none; border-color: var(--orange); background: #1c1d22; }
.error {
  background: rgba(255, 81, 81, 0.12); border: 1px solid rgba(255, 81, 81, 0.3);
  color: var(--error); padding: 10px 14px; border-radius: 10px;
  font-size: 13px; margin-bottom: 14px;
}
.divider {
  display: flex; align-items: center; gap: 12px; margin: 22px 0;
  color: var(--text-dim); font-size: 12px;
}
.divider::before, .divider::after {
  content: ""; flex: 1; height: 1px; background: var(--border);
}
.foot {
  text-align: center; margin-top: 18px; font-size: 14px; color: var(--text-dim);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border); padding: 32px 0; margin-top: 40px;
  color: var(--text-dim); font-size: 13px;
}
.footer-row { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 14px; }

@media (max-width: 640px) {
  .hero h1 { font-size: 38px; }
  .hero p { font-size: 16px; }
  .hero { padding: 50px 0 40px; }
}