/* ── ChurnGuard — style.css ─────────────────────────────────────────────── */

/* Fonts */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:wght@300;400;500;600&display=swap');

/* ── Variables ──────────────────────────────────────────────────────────── */
:root {
  --bg:         #0d0f14;
  --surface:    #13161e;
  --surface-2:  #1a1e2a;
  --border:     #242838;
  --accent:     #635bff;
  --accent-glow:#635bff44;
  --text:       #e8eaf0;
  --text-muted: #7c8399;
  --danger:     #dc2626;
  --warn:       #d97706;
  --ok:         #16a34a;
}

/* ── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  position: relative;
}

/* Subtle noise texture */
.noise {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.4;
}

/* ── Header ─────────────────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px;
  height: 64px;
  background: rgba(13,15,20,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex; align-items: center; gap: 10px;
  font-family: 'DM Serif Display', serif;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}
.logo-icon { color: var(--accent); font-size: 1.1rem; }

.header-nav { display: flex; gap: 8px; }
.nav-link {
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: all .2s;
}
.nav-link:hover { color: var(--text); background: var(--surface-2); }
.nav-link.active { color: var(--text); background: var(--surface-2); }

/* ── Main content ───────────────────────────────────────────────────────── */
.main-content {
  position: relative; z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  padding: 64px 0 48px;
  text-align: center;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 4px 14px;
  border-radius: 50px;
  margin-bottom: 20px;
}

.hero-title {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 20px;
}
.hero-title em {
  color: var(--accent);
  font-style: italic;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto;
}

/* ── Form ───────────────────────────────────────────────────────────────── */
.pred-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 40px;
  position: relative;
}

.pred-form::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--accent-glow), transparent 50%);
  pointer-events: none;
}

.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 28px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.form-grid { display: grid; gap: 16px; margin-bottom: 16px; }
.form-grid-2 { grid-template-columns: repeat(2, 1fr); }
.form-grid-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 640px) {
  .form-grid-2, .form-grid-3 { grid-template-columns: 1fr; }
  .pred-form { padding: 24px; }
}

.field { display: flex; flex-direction: column; gap: 6px; }

.field label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.field label .hint {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  opacity: .7;
}

.field input,
.field select {
  width: 100%;
  padding: 11px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  transition: border-color .2s, box-shadow .2s;
  -webkit-appearance: none;
  appearance: none;
}
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237c8399' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 12px;
  padding-right: 36px;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.field input::placeholder { color: var(--text-muted); }
.field select option { background: var(--surface-2); color: var(--text); }

/* ── CTA button ─────────────────────────────────────────────────────────── */
.cta-btn {
  margin-top: 32px;
  width: 100%;
  padding: 16px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 14px;
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .02em;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s, opacity .2s;
  position: relative;
  z-index: 1;
}
.cta-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 28px var(--accent-glow); }
.cta-btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }