/* ═══════════════════════════════════════════
   THIRTYDAY AI — Design System
   Aesthetic: Refined executive, dark navy dominant,
   teal accent, confident negative space.
   Typography: DM Sans (body) + Instrument Serif (display)
   ═══════════════════════════════════════════ */

/* ─── Imports ─── */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Instrument+Serif:ital@0;1&display=swap');

/* ─── Variables ─── */
:root {
  --navy: #0B1D32;
  --navy-mid: #11263F;
  --navy-light: #1A3352;
  --teal: #1ABC9C;
  --teal-dim: rgba(26, 188, 156, 0.15);
  --teal-glow: rgba(26, 188, 156, 0.3);
  --blue: #2E75B6;
  --orange: #E67E22;
  --green: #27AE60;
  --gold: #F1C40F;
  --white: #F8F9FA;
  --off-white: #E8ECF1;
  --gray: #8A95A5;
  --gray-dim: #5A6577;
  --dark: #060D18;

  --font-body: 'DM Sans', -apple-system, sans-serif;
  --font-display: 'Instrument Serif', Georgia, serif;

  --max-w: 1140px;
  --gap: 2rem;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  background: var(--dark);
  color: var(--off-white);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: var(--teal); text-decoration: none; transition: color 0.2s; }
a:hover { color: #25D4B0; }

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

/* ─── Utility ─── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }
.text-center { text-align: center; }
.text-teal { color: var(--teal); }
.text-gray { color: var(--gray); }
.text-gold { color: var(--gold); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ─── Typography ─── */
h1, h2, h3 { font-family: var(--font-display); font-weight: 400; line-height: 1.15; }

h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  color: var(--white);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  color: var(--white);
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  color: var(--white);
  margin-bottom: 0.6rem;
}

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.75rem;
  display: block;
}

.lead {
  font-size: 1.15rem;
  color: var(--gray);
  max-width: 600px;
  line-height: 1.7;
}

.lead.centered { margin: 0 auto; }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
}

.btn-primary {
  background: var(--teal);
  color: var(--navy);
}
.btn-primary:hover {
  background: #25D4B0;
  color: var(--navy);
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(26, 188, 156, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--teal);
  border: 1.5px solid rgba(26, 188, 156, 0.4);
}
.btn-outline:hover {
  border-color: var(--teal);
  background: var(--teal-dim);
  color: var(--teal);
}

.btn-ghost {
  background: transparent;
  color: var(--gray);
  padding: 0.85rem 1.2rem;
}
.btn-ghost:hover { color: var(--white); }

/* ─── Navigation ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  transition: all 0.3s ease;
  background: rgba(6, 13, 24, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.nav.scrolled {
  background: rgba(6, 13, 24, 0.95);
  border-bottom-color: rgba(255,255,255,0.08);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--white);
  letter-spacing: -0.01em;
}

.nav-logo .dot {
  width: 8px;
  height: 8px;
  background: var(--teal);
  border-radius: 2px;
  transform: rotate(45deg);
}

.nav-logo span { color: var(--teal); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  list-style: none;
}

.nav-links a {
  color: var(--gray);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.5rem 0.9rem;
  border-radius: 5px;
  transition: all 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--white); background: rgba(255,255,255,0.05); }

.nav-cta { margin-left: 0.5rem; }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray);
  margin: 5px 0;
  transition: all 0.3s;
}

/* ─── Hero ─── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 5rem;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(26, 188, 156, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to bottom, transparent, var(--dark));
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
}

.hero h1 { margin-bottom: 1.2rem; }

.hero .lead {
  margin-bottom: 2.2rem;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-grid {
  position: absolute;
  right: -2%;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  opacity: 0.35;
  pointer-events: none;
}

.hero-grid .quad-dot {
  width: 120px;
  height: 120px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
}
.hero-grid .quad-dot:nth-child(1) { background: rgba(46,117,182,0.15); border-color: rgba(46,117,182,0.2); }
.hero-grid .quad-dot:nth-child(2) { background: rgba(26,188,156,0.15); border-color: rgba(26,188,156,0.2); }
.hero-grid .quad-dot:nth-child(3) { background: rgba(230,126,34,0.15); border-color: rgba(230,126,34,0.2); }
.hero-grid .quad-dot:nth-child(4) { background: rgba(39,174,96,0.15); border-color: rgba(39,174,96,0.2); }

/* ─── Sections ─── */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-dark { background: var(--navy); }
.section-darker { background: var(--dark); }
.section-mid { background: var(--navy-mid); }

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-header .lead { margin: 0.8rem auto 0; }

/* ─── Quadrant Cards ─── */
.quad-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
}

.quad-card {
  background: var(--navy-mid);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 1.8rem 1.4rem;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}
.quad-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.12);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.quad-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}
.quad-card.q-strategy::before { background: var(--blue); }
.quad-card.q-governance::before { background: var(--teal); }
.quad-card.q-architecture::before { background: var(--orange); }
.quad-card.q-transition::before { background: var(--green); }

.quad-card .q-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1.2rem;
}
.q-strategy .q-icon { background: rgba(46,117,182,0.15); color: var(--blue); }
.q-governance .q-icon { background: var(--teal-dim); color: var(--teal); }
.q-architecture .q-icon { background: rgba(230,126,34,0.15); color: var(--orange); }
.q-transition .q-icon { background: rgba(39,174,96,0.15); color: var(--green); }

.quad-card h3 { font-family: var(--font-body); font-weight: 600; font-size: 1.05rem; }
.quad-card p { color: var(--gray); font-size: 0.9rem; line-height: 1.6; margin-top: 0.5rem; }

.quad-card ul {
  list-style: none;
  margin-top: 0.8rem;
  padding: 0;
}
.quad-card ul li {
  color: var(--gray);
  font-size: 0.85rem;
  padding: 0.3rem 0;
  padding-left: 1rem;
  position: relative;
}
.quad-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 4px;
  height: 4px;
  border-radius: 50%;
}
.q-strategy ul li::before { background: var(--blue); }
.q-governance ul li::before { background: var(--teal); }
.q-architecture ul li::before { background: var(--orange); }
.q-transition ul li::before { background: var(--green); }

/* ─── Stats Row ─── */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 3rem 0;
}

.stat {
  text-align: center;
  padding: 2rem 1rem;
  background: var(--navy-mid);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.04);
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2.8rem;
  color: var(--teal);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--gray);
}

/* ─── Tier Cards ─── */
.tiers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
}

.tier-card {
  background: var(--navy-mid);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 2rem 1.4rem;
  position: relative;
  transition: all 0.3s ease;
}
.tier-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 50px rgba(0,0,0,0.3);
}
.tier-card.featured {
  border-color: rgba(26, 188, 156, 0.4);
  background: linear-gradient(170deg, var(--navy-mid) 0%, rgba(26,188,156,0.08) 100%);
}

.tier-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--teal);
  color: var(--navy);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.25rem 0.8rem;
  border-radius: 20px;
}

.tier-name {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 0.3rem;
}

.tier-price {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--teal);
  line-height: 1.2;
}
.tier-price small {
  font-size: 0.85rem;
  color: var(--gray);
  font-family: var(--font-body);
}

.tier-desc {
  color: var(--gray);
  font-size: 0.85rem;
  margin: 1rem 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  line-height: 1.6;
}

.tier-features {
  list-style: none;
  padding: 0;
}
.tier-features li {
  font-size: 0.82rem;
  color: var(--gray);
  padding: 0.3rem 0;
  padding-left: 1.2rem;
  position: relative;
}
.tier-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--teal);
  font-size: 0.75rem;
}

/* ─── Stage Timeline ─── */
.stages {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}

.stage-card {
  background: var(--navy-mid);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 1.5rem 1rem;
  text-align: center;
  transition: all 0.3s ease;
}
.stage-card:hover { border-color: rgba(255,255,255,0.12); }

.stage-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
  color: var(--white);
}
.stage-card:nth-child(1) .stage-num { background: var(--blue); }
.stage-card:nth-child(2) .stage-num { background: var(--orange); }
.stage-card:nth-child(3) .stage-num { background: var(--teal); }
.stage-card:nth-child(4) .stage-num { background: var(--green); }
.stage-card:nth-child(5) .stage-num { background: #8E44AD; }

.stage-name {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--white);
  margin-bottom: 0.2rem;
}
.stage-time { font-size: 0.78rem; color: var(--teal); margin-bottom: 0.5rem; }
.stage-desc { font-size: 0.8rem; color: var(--gray); line-height: 1.5; }

/* ─── CTA Banner ─── */
.cta-banner {
  background: linear-gradient(135deg, var(--navy-light) 0%, var(--navy-mid) 100%);
  border: 1px solid rgba(26,188,156,0.15);
  border-radius: 16px;
  padding: 3.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(26,188,156,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.cta-banner h2 { margin-bottom: 0.8rem; position: relative; }
.cta-banner .lead { margin: 0 auto 2rem; position: relative; }
.cta-banner .btn { position: relative; }

/* ─── Contact / Lead Form ─── */
.contact-form {
  max-width: 480px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--gray);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  background: var(--navy-mid);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(26, 188, 156, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-dim);
}

.form-success {
  text-align: center;
  padding: 2rem;
  background: var(--teal-dim);
  border-radius: 12px;
  border: 1px solid rgba(26,188,156,0.3);
  display: none;
}
.form-success h3 { color: var(--teal); font-family: var(--font-body); font-weight: 600; }
.form-success p { color: var(--gray); margin-top: 0.5rem; }

/* ─── Footer ─── */
.footer {
  padding: 3rem 0;
  border-top: 1px solid rgba(255,255,255,0.04);
  background: var(--dark);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--gray-dim);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}
.footer-links a {
  color: var(--gray-dim);
  font-size: 0.82rem;
}
.footer-links a:hover { color: var(--gray); }

/* ─── Animations ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-1 { transition-delay: 0.05s; }
.stagger-2 { transition-delay: 0.1s; }
.stagger-3 { transition-delay: 0.15s; }
.stagger-4 { transition-delay: 0.2s; }

/* ─── Responsive ─── */
@media (max-width: 960px) {
  .quad-grid, .tiers { grid-template-columns: repeat(2, 1fr); }
  .stages { grid-template-columns: repeat(3, 1fr); }
  .hero-grid { display: none; }
  .stats { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
  .quad-grid, .tiers, .stages { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding: 8rem 0 4rem; }
  .section { padding: 4rem 0; }
  .cta-banner { padding: 2rem 1.5rem; }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(6,13,24,0.98);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .nav-cta { margin-left: 0; margin-top: 0.5rem; }
  .hero-actions { flex-direction: column; }
  .footer-inner { flex-direction: column; text-align: center; }
}