/* ==========================================================================
   TankPilot — Design tokens
   ========================================================================== */

:root {
  --bg: #0B0B0B;
  --card: #17181A;
  --card-border: rgba(255, 255, 255, 0.08);
  --primary: #2ECC71;
  --primary-dim: rgba(46, 204, 113, 0.14);
  --accent: #FFC83D;
  --accent-dim: rgba(255, 200, 61, 0.14);
  --text: #FFFFFF;
  --text-secondary: #A7A7A7;

  --radius: 18px;
  --radius-sm: 12px;
  --radius-lg: 28px;

  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.45);

  --container: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

/* ==========================================================================
   Reset
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, p {
  margin: 0;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ==========================================================================
   Header / nav
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 11, 11, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.nav-brand img {
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  color: var(--text);
  cursor: pointer;
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px;
    background: var(--card);
    border-bottom: 1px solid var(--card-border);
    transform-origin: top;
    transform: scaleY(0);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.18s ease, opacity 0.18s ease;
  }

  .nav-links.is-open {
    transform: scaleY(1);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    width: 100%;
    padding: 12px 10px;
    border-radius: var(--radius-sm);
  }

  .nav-links a:hover {
    background: rgba(255, 255, 255, 0.04);
  }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 999px;
  font-size: 0.98rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--primary);
  color: #08130D;
  box-shadow: 0 8px 24px rgba(46, 204, 113, 0.28);
}

.btn-primary:hover {
  box-shadow: 0 10px 32px rgba(46, 204, 113, 0.4);
}

.btn-primary[disabled] {
  background: rgba(46, 204, 113, 0.18);
  color: rgba(255, 255, 255, 0.55);
  box-shadow: none;
  cursor: not-allowed;
}

.btn-primary[disabled]:hover {
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  border-color: var(--card-border);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.04);
}

.btn-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-secondary);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding: 96px 0 72px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 560px;
  background: radial-gradient(closest-side, rgba(46, 204, 113, 0.16), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-actions,
  .hero-eyebrow {
    justify-content: center;
  }
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.04;
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  color: var(--text-secondary);
  margin-top: 20px;
  max-width: 44ch;
}

@media (max-width: 900px) {
  .hero-tagline {
    max-width: none;
    margin-inline: auto;
  }
}

.hero-subtitle {
  margin-top: 28px;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.hero-subtitle span {
  display: block;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 40px;
}

.hero-art {
  position: relative;
}

.hero-art-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* ==========================================================================
   Sections
   ========================================================================== */

section {
  padding: 88px 0;
}

.section-head {
  max-width: 640px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-eyebrow {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-head p {
  margin-top: 16px;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ==========================================================================
   Feature cards
   ========================================================================== */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 960px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.16);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-card.is-upcoming .feature-icon {
  background: var(--accent-dim);
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 650;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.feature-card p {
  margin-top: 10px;
  color: var(--text-secondary);
  font-size: 0.98rem;
}

/* ==========================================================================
   Roadmap
   ========================================================================== */

.roadmap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 820px) {
  .roadmap {
    grid-template-columns: 1fr;
  }
}

.roadmap-column {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 26px;
}

.roadmap-column h3 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.roadmap-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
}

.roadmap-column.is-done h3 { color: var(--primary); }
.roadmap-column.is-done .roadmap-dot { background: var(--primary); }

.roadmap-column.is-progress h3 { color: var(--accent); }
.roadmap-column.is-progress .roadmap-dot { background: var(--accent); }

.roadmap-column.is-future h3 { color: var(--text-secondary); }
.roadmap-column.is-future .roadmap-dot { background: var(--text-secondary); }

.roadmap-column li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid var(--card-border);
  font-size: 0.98rem;
  color: var(--text);
}

.roadmap-column li:first-of-type {
  border-top: none;
  padding-top: 0;
}

.roadmap-column.is-future li {
  color: var(--text-secondary);
}

.roadmap-check {
  flex: none;
  color: var(--primary);
  margin-top: 2px;
}

/* ==========================================================================
   About
   ========================================================================== */

.about {
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
  padding: 56px;
  margin: 0 24px;
  max-width: calc(var(--container) - 48px);
  margin-inline: auto;
}

@media (max-width: 720px) {
  .about {
    padding: 32px 24px;
    margin-inline: 16px;
  }
}

.about h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.about p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 74ch;
}

.about p + p {
  margin-top: 16px;
}

.about strong {
  color: var(--text);
  font-weight: 600;
}

/* ==========================================================================
   CTA band
   ========================================================================== */

.cta-band {
  text-align: center;
}

.cta-band-inner {
  background: linear-gradient(135deg, rgba(46, 204, 113, 0.14), rgba(255, 200, 61, 0.08));
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 64px 32px;
}

.cta-band h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.cta-band p {
  color: var(--text-secondary);
  margin-top: 14px;
  font-size: 1.05rem;
}

.cta-band .hero-actions {
  justify-content: center;
  margin-top: 32px;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.footer-brand img {
  width: 22px;
  height: 22px;
}

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

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  transition: color 0.2s ease;
}

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

.footer-copy {
  color: var(--text-secondary);
  font-size: 0.85rem;
  width: 100%;
  padding-top: 20px;
  border-top: 1px solid var(--card-border);
  margin-top: 4px;
}

/* ==========================================================================
   Legal / privacy page
   ========================================================================== */

.legal {
  padding: 72px 0 96px;
}

.legal-header {
  max-width: 720px;
  margin: 0 auto 48px;
}

.legal-header h1 {
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.legal-updated {
  margin-top: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.legal-body {
  max-width: 720px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 48px;
}

@media (max-width: 640px) {
  .legal-body {
    padding: 28px 22px;
  }
}

.legal-body h2 {
  font-size: 1.25rem;
  font-weight: 650;
  margin-top: 36px;
  margin-bottom: 14px;
}

.legal-body h2:first-child {
  margin-top: 0;
}

.legal-body p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 12px;
}

.legal-body ul {
  margin-bottom: 12px;
}

.legal-body li {
  color: var(--text-secondary);
  font-size: 1rem;
  padding-left: 22px;
  position: relative;
  margin-bottom: 10px;
}

.legal-body li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--primary);
}

.legal-body a {
  color: var(--primary);
  font-weight: 600;
}

.legal-body a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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