/* ===================================================================
   Codeqraft Landing Page
   =================================================================== */

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

:root {
  --bg-primary: #0A0A0F;
  --bg-secondary: #111117;
  --bg-card: #16161E;
  --bg-card-hover: #1C1C26;
  --border: #1E1E2E;
  --border-light: #2A2A3A;

  --text-primary: #F4F4F5;
  --text-secondary: #8B8B9E;
  --text-muted: #5A5A6E;

  --accent: #F59E0B;
  --accent-hover: #D97706;
  --accent-subtle: rgba(245, 158, 11, 0.08);
  --accent-glow: rgba(245, 158, 11, 0.15);

  --gradient: linear-gradient(135deg, #FBBF24 0%, #F97316 100%);

  --success: #22C55E;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'SF Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;

  --container: 1120px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;

  --transition: 0.2s ease;
  --transition-slow: 0.4s ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

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

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: background var(--transition), border-color var(--transition),
              backdrop-filter var(--transition);
  border-bottom: 1px solid transparent;
}

.nav--scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo-icon {
  width: 32px;
  height: 32px;
}

.nav-logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* --- Gradient Text --- */
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient);
  color: #0A0A0F;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn--success {
  background: var(--success) !important;
  color: #fff !important;
}

/* --- Input Group --- */
.input-group {
  display: flex;
  gap: 8px;
  max-width: 440px;
}

.input-email {
  flex: 1;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color var(--transition);
  min-width: 0;
}

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

.input-email:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

/* --- Hero --- */
.hero {
  position: relative;
  padding: 160px 0 80px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(
    ellipse at center,
    var(--accent-glow) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--border-light);
  background: var(--accent-subtle);
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: 32px;
}

.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-subtitle {
  max-width: 580px;
  font-size: clamp(1rem, 1.5vw, 1.1875rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 64px;
}

.hero-form .input-group {
  width: 100%;
}

.hero-form-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* --- Terminal Mockup --- */
.terminal {
  width: 100%;
  max-width: 640px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.03),
    0 20px 60px rgba(0, 0, 0, 0.5);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot--red   { background: #EF4444; }
.terminal-dot--yellow { background: #F59E0B; }
.terminal-dot--green  { background: #22C55E; }

.terminal-title {
  flex: 1;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: var(--mono);
  margin-right: 44px;
}

.terminal-body {
  padding: 20px;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.8;
}

.terminal-line {
  display: flex;
  gap: 8px;
}

.terminal-prompt {
  color: var(--accent);
  user-select: none;
}

.terminal-cmd {
  color: var(--text-primary);
}

.terminal-output {
  color: var(--text-secondary);
  opacity: 0;
  animation: terminalFade 0.3s ease forwards;
}

.terminal-accent {
  color: var(--accent);
}

.terminal-success {
  color: var(--success);
}

@keyframes terminalFade {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- Sections --- */
.section {
  padding: 120px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Problem / Comparison --- */
.section-problem {
  border-top: 1px solid var(--border);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.comparison-card {
  padding: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.comparison-card--before {
  background: var(--bg-secondary);
}

.comparison-card--after {
  background: var(--accent-subtle);
  border-color: rgba(245, 158, 11, 0.2);
}

.comparison-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.comparison-card--before .comparison-label {
  color: var(--text-muted);
}

.comparison-card--after .comparison-label {
  color: var(--accent);
}

.comparison-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.comparison-list li:last-child {
  margin-bottom: 0;
}

.comparison-card--before .comparison-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  opacity: 0.5;
}

.comparison-card--after .comparison-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* --- How It Works --- */
.section-how {
  border-top: 1px solid var(--border);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step-card {
  padding: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  transition: border-color var(--transition), background var(--transition);
}

.step-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card);
}

.step-number {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--mono);
  margin-bottom: 20px;
}

.step-icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
  margin-bottom: 20px;
}

.step-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.step-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* --- Features --- */
.section-features {
  border-top: 1px solid var(--border);
}

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

.feature-card {
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  transition: border-color var(--transition), transform var(--transition);
}

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

.feature-icon {
  width: 32px;
  height: 32px;
  color: var(--accent);
  margin-bottom: 16px;
}

.feature-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* --- Trust --- */
.section-trust {
  border-top: 1px solid var(--border);
}

.trust-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.trust-text {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  line-height: 1.7;
  margin: 24px 0 32px;
}

.trust-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.trust-list li:last-child {
  margin-bottom: 0;
}

.trust-check {
  width: 20px;
  height: 20px;
  color: var(--success);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Architecture Diagram */
.arch-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.arch-node {
  padding: 20px 32px;
  border-radius: var(--radius-sm);
  text-align: center;
}

.arch-node--binary {
  background: var(--accent-subtle);
  border: 1px solid rgba(245, 158, 11, 0.25);
  width: 100%;
  max-width: 280px;
}

.arch-node-label {
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.arch-node-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.arch-connectors {
  display: flex;
  gap: 48px;
  justify-content: center;
}

.arch-line {
  width: 1px;
  height: 32px;
  background: var(--border-light);
}

.arch-children {
  display: flex;
  gap: 16px;
}

.arch-node--child {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 14px 20px;
}

.arch-node--child .arch-node-label {
  font-size: 0.8125rem;
  font-weight: 600;
}

/* --- CTA --- */
.section-cta {
  border-top: 1px solid var(--border);
}

.cta-box {
  text-align: center;
  padding: 80px 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background:
    radial-gradient(ellipse at top, var(--accent-subtle) 0%, transparent 60%),
    var(--bg-secondary);
}

.cta-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.cta-subtitle {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  margin-bottom: 32px;
}

.cta-form .input-group {
  margin: 0 auto;
}

/* --- Footer --- */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-logo-icon {
  width: 24px;
  height: 24px;
}

.footer-brand-text {
  font-size: 0.9375rem;
  font-weight: 600;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* --- Reveal Animation --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.steps-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.steps-grid .reveal:nth-child(3) { transition-delay: 0.2s; }

.features-grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.features-grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.features-grid .reveal:nth-child(4) { transition-delay: 0.24s; }
.features-grid .reveal:nth-child(5) { transition-delay: 0.32s; }
.features-grid .reveal:nth-child(6) { transition-delay: 0.4s; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .trust-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .trust-visual {
    order: -1;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 120px 0 60px;
  }

  .section {
    padding: 80px 0;
  }

  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .input-group {
    flex-direction: column;
    max-width: 100%;
  }

  .input-email,
  .btn {
    width: 100%;
  }

  .terminal {
    max-width: 100%;
  }

  .terminal-body {
    padding: 16px;
    font-size: 0.75rem;
    overflow-x: auto;
  }

  .cta-box {
    padding: 48px 24px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .arch-children {
    flex-direction: column;
    align-items: center;
  }

  .arch-connectors {
    flex-direction: column;
    align-items: center;
    gap: 0;
  }

  .arch-connectors .arch-line {
    width: 1px;
    height: 16px;
  }
}

@media (max-width: 480px) {
  .hero-badge {
    font-size: 0.75rem;
    padding: 5px 12px;
  }

  .section-header {
    margin-bottom: 40px;
  }
}