/* =============================================
   Thurin Landing Page — style.css
   Theme: Dark navy, accent #2980B9
   ============================================= */

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

:root {
  --navy:       #0D1829;
  --navy-mid:   #1B2A4A;
  --navy-light: #243356;
  --navy-card:  #162038;
  --accent:     #2980B9;
  --accent-dim: #1f6492;
  --accent-glow:#2980B920;
  --text-primary:   #F0F4FF;
  --text-secondary: #8DA4C4;
  --text-muted:     #4E6585;
  --border:     #1E3052;
  --border-light: #253D5E;
  --success:    #27AE60;
  --radius-sm:  6px;
  --radius:     12px;
  --radius-lg:  20px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 60px rgba(41,128,185,0.12);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background-color: var(--navy);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: #5DADE2; }

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

/* --- Section Spacing --- */
.section-gap {
  padding: 100px 0;
}

/* --- Typography Utilities --- */
.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.section-sub {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 56px;
}

.gradient-text {
  background: linear-gradient(135deg, #5DADE2 0%, #2980B9 40%, #A855F7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* =============================================
   Navigation
   ============================================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0;
  transition: background var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(13, 24, 41, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), #5DADE2);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 800;
  color: white;
  letter-spacing: -0.5px;
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-badge {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(41,128,185,0.3);
  padding: 4px 10px;
  border-radius: 999px;
}

/* =============================================
   Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-sm {
  font-size: 13px;
  padding: 7px 16px;
}

.btn-primary {
  background: var(--accent);
  color: white;
  padding: 12px 24px;
  box-shadow: 0 0 0 0 rgba(41,128,185,0);
}

.btn-primary:hover {
  background: #3490c8;
  color: white;
  box-shadow: 0 4px 20px rgba(41,128,185,0.4);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  padding: 12px 24px;
  border: 1px solid var(--border-light);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--text-primary);
  background: var(--accent-glow);
}

.btn-full {
  width: 100%;
  justify-content: center;
  padding: 14px 24px;
}

.btn-waitlist {
  padding: 13px 28px;
  flex-shrink: 0;
}

/* Button loading state */
.btn-loading {
  display: none;
  align-items: center;
}

.btn.is-loading .btn-label { display: none; }
.btn.is-loading .btn-loading { display: flex; }

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* =============================================
   Hero
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* Grid background */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(41,128,185,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(41,128,185,0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 30%, transparent 100%);
}

/* Accent glow blob */
.hero-glow {
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(41,128,185,0.12) 0%, transparent 65%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-content {
  max-width: 560px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 28px;
  letter-spacing: 0.02em;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

.hero-headline {
  font-size: clamp(38px, 5.5vw, 68px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.hero-sub {
  font-size: 22px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 480px;
}

/* Waitlist Form */
.waitlist-wrap {
  margin-bottom: 24px;
}

.waitlist-form {
  width: 100%;
}

.input-group {
  display: flex;
  gap: 10px;
  background: var(--navy-card);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 5px 5px 5px 16px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input-group:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(41,128,185,0.15);
}

.input-email {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font);
  font-size: 15px;
  color: var(--text-primary);
  padding: 0;
  min-width: 0;
}

.input-email::placeholder {
  color: var(--text-muted);
}

.form-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 10px;
  padding-left: 4px;
}

/* Success State */
.waitlist-success {
  display: none;
  align-items: center;
  gap: 16px;
  background: rgba(39,174,96,0.08);
  border: 1px solid rgba(39,174,96,0.25);
  border-radius: var(--radius);
  padding: 18px 22px;
}

.waitlist-success.is-visible {
  display: flex;
}

.waitlist-success--bottom.is-visible {
  display: flex;
}

.success-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--success);
  border-radius: 50%;
  font-size: 16px;
  color: white;
  flex-shrink: 0;
}

.waitlist-success strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
  margin-bottom: 2px;
}

.waitlist-success p {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
}

.hero-trust {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Hero Terminal Visual */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.terminal {
  background: #0A1220;
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  overflow: hidden;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow-card), 0 0 60px rgba(41,128,185,0.08);
  font-family: 'SF Mono', 'Fira Code', 'Fira Mono', 'Cascadia Code', monospace;
  font-size: 13.5px;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  background: #0D1829;
  border-bottom: 1px solid var(--border);
}

.t-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}
.t-red    { background: #FF5F56; }
.t-yellow { background: #FFBD2E; }
.t-green  { background: #27C93F; }

.t-title {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: 4px;
  flex: 1;
  text-align: center;
}

.terminal-body {
  padding: 20px 20px 24px;
  line-height: 1.9;
}

.t-line { display: flex; align-items: flex-start; gap: 8px; }
.t-blank { height: 8px; }

.t-prompt { color: var(--accent); flex-shrink: 0; user-select: none; }
.t-cmd    { color: #E8F0FF; }
.t-out    { color: var(--text-secondary); padding-left: 0; }
.t-success{ color: #27C93F; }
.t-muted  { color: var(--text-muted); font-size: 12px; }

.t-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(41,128,185,0.1);
  border: 1px solid rgba(41,128,185,0.2);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--accent);
  margin-top: 4px;
}

.lock-icon { font-size: 14px; }

.t-cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  background: var(--accent);
  margin-left: 2px;
  margin-top: 4px;
  border-radius: 1px;
  animation: blink 1.1s step-start infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* =============================================
   Problem Section
   ============================================= */
.problem {
  background: var(--navy-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.problem-card {
  background: var(--navy-mid);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition);
}

.problem-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.problem-icon {
  font-size: 28px;
  margin-bottom: 16px;
  line-height: 1;
}

.problem-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.35;
}

.problem-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.problem-bridge {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 680px;
  padding: 28px;
  background: rgba(41,128,185,0.06);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.problem-bridge strong {
  color: var(--text-primary);
}

/* =============================================
   How It Works
   ============================================= */
.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.how-card {
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.how-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.how-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.how-card:hover::before {
  opacity: 1;
}

.how-number {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.how-icon {
  font-size: 32px;
  margin-bottom: 20px;
  line-height: 1;
}

.how-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}

.how-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.how-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.how-list li {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.how-list li::before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* =============================================
   Pricing
   ============================================= */
.pricing {
  background: var(--navy-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 840px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--navy-mid);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  transition: border-color var(--transition);
}

.pricing-card--featured {
  border-color: var(--accent);
  background: linear-gradient(160deg, #1B2A4A 0%, #162038 100%);
  box-shadow: 0 0 0 1px rgba(41,128,185,0.2), var(--shadow-glow);
}

.pricing-featured-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--accent);
  color: white;
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

.pricing-tier {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 14px;
}

.price-range {
  font-size: 38px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -1px;
  line-height: 1;
}

.price-period {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 400;
}

.pricing-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.pricing-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  flex: 1;
}

.pricing-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.check {
  color: var(--success);
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* =============================================
   Final CTA
   ============================================= */
.final-cta { padding: 80px 0; }

.cta-box {
  background: var(--navy-mid);
  border: 1px solid var(--border-light);
  border-radius: 24px;
  padding: 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 300px;
  background: radial-gradient(ellipse at center, rgba(41,128,185,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-box h2 {
  font-size: clamp(24px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
  position: relative;
}

.cta-box p {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 36px;
  position: relative;
}

.waitlist-form--inline {
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}

.waitlist-success--bottom {
  max-width: 400px;
  margin: 0 auto;
}

/* =============================================
   Footer
   ============================================= */
.footer {
  background: #080F1C;
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

.footer-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(41,128,185,0.1);
  border: 1px solid rgba(41,128,185,0.25);
  padding: 3px 10px;
  border-radius: 999px;
  width: fit-content;
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-col h4 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-legal a:hover {
  color: var(--text-secondary);
}

/* =============================================
   Scroll Animations
   ============================================= */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children in grids */
.problem-grid .problem-card.fade-up:nth-child(1),
.how-grid .how-card.fade-up:nth-child(1),
.pricing-grid .pricing-card.fade-up:nth-child(1) {
  transition-delay: 0ms;
}

.problem-grid .problem-card.fade-up:nth-child(2),
.how-grid .how-card.fade-up:nth-child(2),
.pricing-grid .pricing-card.fade-up:nth-child(2) {
  transition-delay: 80ms;
}

.problem-grid .problem-card.fade-up:nth-child(3),
.how-grid .how-card.fade-up:nth-child(3) {
  transition-delay: 160ms;
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: left;
  }

  .hero-visual {
    justify-content: center;
  }

  .terminal { max-width: 100%; }

  .problem-grid,
  .how-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .section-gap { padding: 72px 0; }

  .hero { padding: 100px 0 64px; min-height: auto; }

  .hero-headline {
    font-size: clamp(34px, 8vw, 52px);
    letter-spacing: -1px;
  }

  .input-group {
    flex-direction: column;
    gap: 8px;
    padding: 12px;
  }

  .btn-waitlist {
    width: 100%;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
  }

  .cta-box {
    padding: 40px 24px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 40px;
  }

  .footer-links { gap: 40px; }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .nav-badge { display: none; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }

  .hero-headline { font-size: 36px; }

  .how-card { padding: 28px 20px; }

  .pricing-card { padding: 28px 24px; }

  .footer-links { flex-direction: column; gap: 28px; }
}

/* =============================================
   Focus & Accessibility
   ============================================= */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .eyebrow-dot,
  .t-cursor,
  .spinner {
    animation: none;
  }
}