/* MarkDeck Landing Page — style.css */
:root {
  --bg: #ffffff;
  --bg-alt: #f8f9fa;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --accent: #06b6d4;
  --border: #e5e7eb;
  --card-bg: #ffffff;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
  --radius: 12px;
  --max-w: 1120px;
  --screenshots-bg: linear-gradient(140deg, #eef2ff 0%, #e0e7ff 40%, #f0e9ff 100%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --bg-alt: #1e293b;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --card-bg: #1e293b;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.4);
    --screenshots-bg: linear-gradient(140deg, #0f172a 0%, #1a1040 40%, #0e1a30 100%);
  }
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* NAV */
nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}
nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-size: 1.25rem; font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: 8px;
}
.nav-logo span { color: var(--primary); }
.nav-links { display: flex; gap: 24px; list-style: none; }
.nav-links a { color: var(--text-muted); font-size: 0.9rem; font-weight: 500; }
.nav-links a:hover { color: var(--primary); text-decoration: none; }

/* HERO */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
}
.hero h1 .highlight { color: var(--primary); }
.hero p {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 32px;
}
.badges { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; align-items: center; max-width: 500px; margin: 0 auto; }
.badges .coming-soon-label {
  width: 100%; text-align: center; margin-top: 0.5rem;
  font-size: 0.85rem; color: #888; font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase;
}
.badges a img { height: 48px; }

/* FEATURES */
.features {
  padding: 80px 0;
  background: var(--bg-alt);
}
.section-title {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 48px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.feature-icon { font-size: 2rem; margin-bottom: 12px; }
.feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p { color: var(--text-muted); font-size: 0.95rem; }

/* SCREENSHOTS */
.screenshots {
  padding: 80px 0 96px;
  text-align: center;
  background: var(--screenshots-bg);
}
.screenshots .section-title {
  margin-bottom: 12px;
}
.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 56px;
}
.screenshot-phone-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px 32px;
  max-width: 1040px;
  margin: 0 auto;
}

.screenshot-phone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  transition: transform 0.3s ease;
}

/* Tilt classes — alternated per design spec */
.screenshot-phone.tilt-neg2 { transform: rotate(-2deg); }
.screenshot-phone.tilt-0    { transform: rotate(0deg);  }
.screenshot-phone.tilt-pos2 { transform: rotate(2deg);  }

.screenshot-phone.tilt-neg2:hover { transform: rotate(-1deg) scale(1.03); }
.screenshot-phone.tilt-0:hover    { transform: rotate(0deg)  scale(1.03); }
.screenshot-phone.tilt-pos2:hover { transform: rotate(1deg)  scale(1.03); }

/* Tablet: 2 columns */
@media (max-width: 900px) {
  .screenshot-phone-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 24px;
    max-width: 680px;
  }
}

/* Phone bezel / frame */
.screenshot-phone-frame {
  position: relative;
  background: #1c1c1e;
  border-radius: 44px;
  padding: 16px 10px 20px;
  width: 310px;
  box-shadow:
    0 40px 80px rgba(0,0,0,0.40),
    0 16px 32px rgba(0,0,0,0.25),
    0 4px 8px rgba(0,0,0,0.15),
    inset 0 0 0 2px #3a3a3c;
}

/* Dynamic Island / notch — hidden */
.screenshot-phone-frame::before {
  display: none;
  z-index: 3;
}

/* Side buttons (decorative) */
.screenshot-phone-frame::after {
  content: '';
  position: absolute;
  right: -4px;
  top: 80px;
  width: 4px;
  height: 60px;
  background: #2c2c2e;
  border-radius: 0 3px 3px 0;
  box-shadow: 0 80px 0 #2c2c2e;
}

.screenshot-phone-frame img {
  width: 100%;
  border-radius: 34px;
  display: block;
  position: relative;
  z-index: 1;
}

.screenshot-phone-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* CTA */
.cta {
  padding: 80px 0;
  background: var(--bg-alt);
  text-align: center;
}
.cta h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.cta p { color: var(--text-muted); margin-bottom: 32px; }

/* EMAIL SIGNUP */
.signup {
  padding: 60px 0;
  text-align: center;
}
.signup h2 { font-size: 1.5rem; margin-bottom: 8px; }
.signup p { color: var(--text-muted); margin-bottom: 24px; }
.signup-form {
  display: flex; gap: 12px;
  max-width: 440px; margin: 0 auto;
}
.signup-form input {
  flex: 1; padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}
.signup-form button {
  padding: 12px 24px;
  background: var(--primary);
  color: #fff; border: none;
  border-radius: 8px;
  font-weight: 600; font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}
.signup-form button:hover { background: var(--primary-dark); }

/* FOOTER */
footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}
footer .footer-links {
  display: flex; gap: 24px; justify-content: center;
  list-style: none;
  margin-bottom: 16px;
}
footer .footer-links a { color: var(--text-muted); }
footer .footer-links a:hover { color: var(--primary); }

/* CONTACT FORM */
.contact { padding: 64px 0; background: var(--bg); }
.contact-form {
  max-width: 560px;
  margin: 0 auto;
}
.form-group {
  margin-bottom: 1.25rem;
}
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text);
  font-size: 0.95rem;
}
.form-group .optional {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.form-group small {
  display: block;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 0.25rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--bg-alt);
  color: var(--text);
  transition: border-color 0.2s;
  box-sizing: border-box;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}
.form-group textarea { resize: vertical; }
.contact-form button {
  width: 100%;
  padding: 0.85rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
  margin-top: 0.5rem;
}
.contact-form button:hover:not(:disabled) { background: var(--primary-dark); }
.contact-form button:disabled { opacity: 0.5; cursor: not-allowed; }
.form-message { text-align: center; margin-top: 1rem; font-size: 0.95rem; }
.form-message.success { color: #16a34a; }
.form-message.error { color: #dc2626; }
.cf-turnstile { margin-bottom: 1rem; }

/* LANGUAGE SWITCHER */
.lang-switcher { display: flex; gap: 4px; align-items: center; }
.lang-btn {
  background: transparent; border: 1px solid var(--border); color: var(--text-muted);
  padding: 4px 10px; border-radius: 6px; font-size: 0.8rem; font-weight: 600;
  cursor: pointer; transition: all 0.2s; font-family: inherit;
  text-decoration: none; display: inline-block;
}
.lang-btn:hover { color: var(--primary); border-color: var(--primary); }
.lang-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* LEGAL PAGES */
.legal { max-width: 720px; margin: 0 auto; padding: 48px 24px; }
.legal h1 { margin-bottom: 8px; }
.legal h2 { margin-top: 32px; margin-bottom: 8px; }
.legal h3 { margin-top: 20px; margin-bottom: 6px; }
.legal p, .legal li { line-height: 1.7; }
.legal ul { margin: 8px 0 8px 24px; }
.updated { color: var(--text-muted); margin-bottom: 32px; font-size: 0.9rem; }

/* RESPONSIVE */
@media (max-width: 640px) {
  .hero { padding: 48px 0 40px; }
  .features, .cta, .signup { padding: 48px 0; }
  .screenshots { padding: 56px 0 72px; }
  .screenshot-phone-grid { grid-template-columns: 1fr; gap: 40px; max-width: 320px; }
  .screenshot-phone-frame { width: 260px; border-radius: 38px; padding: 14px 8px 18px; }
  .screenshot-phone-frame img { border-radius: 28px; }
  .screenshot-phone.tilt-neg2 { transform: rotate(-1deg); }
  .screenshot-phone.tilt-0    { transform: rotate(0deg);  }
  .screenshot-phone.tilt-pos2 { transform: rotate(1deg);  }
  .signup-form { flex-direction: column; }
  .nav-links { display: none; }
}