:root {
  --bg: #0a0a0a;
  --bg-alt: #131313;
  --card: #161616;
  --line: rgba(255, 255, 255, 0.12);
  --text: #f5f5f5;
  --muted: #a3a3a3;
  --white: #ffffff;
  --success-bg: #10241a;
  --success-text: #7fdba0;
  --error-bg: #2a1414;
  --error-text: #ff8a8a;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-narrow { max-width: 720px; }

img { max-width: 100%; display: block; }

.logo { height: 28px; width: auto; }
.logo-footer { height: 24px; opacity: 0.85; }

a { color: inherit; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  margin: 0 0 14px;
}

h1, h2, h3 {
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.1; }
h2 { font-size: clamp(24px, 3.2vw, 34px); }
h3 { font-size: 18px; margin-bottom: 10px; }

p { margin: 0 0 16px; color: var(--text); }

.lead { font-size: 18px; color: var(--muted); max-width: 680px; }
.lead-sm { font-size: 16px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.btn:hover { opacity: 0.85; }
.btn:active { transform: scale(0.98); }
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-primary { background: var(--white); color: #0a0a0a; }
.btn-ghost { background: transparent; color: var(--white); border-color: var(--line); }
.btn-block { width: 100%; padding: 16px; font-size: 16px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Hero */
.hero {
  padding: 88px 0 64px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(255,255,255,0.08), transparent);
}
.hero-thanks { text-align: center; }
.hero-thanks .hero-inner { display: flex; flex-direction: column; align-items: center; }
.hero-sub { font-size: 18px; color: var(--muted); max-width: 620px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 8px; }

/* Sections */
.section { padding: 72px 0; border-bottom: 1px solid var(--line); }
.section-alt { background: var(--bg-alt); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 28px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}
.card-highlight { border-color: rgba(255,255,255,0.35); }
.card p { color: var(--muted); margin-bottom: 0; }

.check-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.check-list li { position: relative; padding-left: 26px; color: var(--muted); }
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 7px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--white);
}

/* Form */
form { margin-top: 32px; }
.form-row { margin-bottom: 20px; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-row-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="file"],
select,
textarea {
  width: 100%;
  margin-top: 8px;
  padding: 13px 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
}
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: rgba(255,255,255,0.5);
}

fieldset {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  margin: 0;
}
legend {
  font-size: 13px;
  color: var(--muted);
  padding: 0 6px;
}
.radio {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 400;
  margin-right: 16px;
  font-size: 14px;
}
.radio input { width: auto; margin: 0; }

.checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-weight: 400;
  font-size: 14px;
  color: var(--muted);
}
.checkbox input { width: auto; margin: 3px 0 0; }

.field-error {
  display: block;
  color: var(--error-text);
  font-size: 13px;
  margin-top: 6px;
}

.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px; height: 1px;
  opacity: 0;
}

.alert {
  padding: 14px 18px;
  border-radius: 10px;
  font-size: 15px;
  margin-bottom: 24px;
}
.alert-success { background: var(--success-bg); color: var(--success-text); }
.alert-error { background: var(--error-bg); color: var(--error-text); }

/* Footer */
.site-footer { padding: 48px 0; }
.site-footer-inner { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 10px; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; justify-content: center; font-size: 14px; color: var(--muted); }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--white); }
.footer-copy { color: var(--muted); font-size: 13px; margin: 0; }

@media (max-width: 720px) {
  .grid-2, .grid-3, .form-row-2, .form-row-3 { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 40px; }
  .section { padding: 48px 0; }
}