/* ============================================================
   Nextdriv — static site styles
   Dark theme, blue #1A4DFF accent, light rounded panels
   ============================================================ */

:root {
  --bg: #121212;
  --bg-soft: #1a1a1a;
  --panel: #ececec;
  --panel-text: #121212;
  --text: #ffffff;
  --text-dim: #c7c7c7;
  --accent: #1A4DFF;
  --radius: 36px;
  --nav-h: 76px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(18, 18, 18, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo img { height: 26px; width: auto; }

.nav-links {
  display: flex;
  gap: 40px;
  list-style: none;
}

.nav-links a {
  font-size: 16px;
  color: var(--text);
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--text-dim); }
.nav-links a.active { color: #8f8f8f; }

.nav-lang {
  display: flex;
  gap: 4px;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 13px;
  letter-spacing: 0.05em;
}

.nav-lang a { color: #8f8f8f; padding: 0 4px; }
.nav-lang a.active { color: #fff; font-weight: 600; }
.nav-lang span { color: #555; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 26px;
  cursor: pointer;
  line-height: 1;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  color: #121212;
  border-radius: 999px;
  padding: 10px 12px 10px 26px;
  font-size: 16px;
  font-weight: 500;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.35); }

.btn .btn-arrow {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #121212;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}

.btn--dark { background: #121212; color: #fff; }
.btn--dark .btn-arrow { background: #fff; color: #121212; }

.btn--accent { background: var(--accent); color: #fff; }
.btn--accent .btn-arrow { background: #fff; color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 60px) 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.32) saturate(0.85);
}

.hero-content { max-width: 720px; }

.hero h1 {
  font-size: clamp(44px, 6.5vw, 84px);
  font-weight: 800;
  line-height: 1.04;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin-bottom: 36px;
}

.hero p {
  font-size: 19px;
  color: var(--text-dim);
  max-width: 620px;
  margin-top: 36px;
}

.hero--short { min-height: 62vh; }

.hero-trust {
  margin-top: 28px;
  font-size: 14.5px !important;
  color: #9aa3b2 !important;
  letter-spacing: 0.01em;
}

/* ---------- Sections ---------- */
section { padding: 100px 0; }

.kicker {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 18px;
}

.section-title {
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  max-width: 900px;
}

.section-sub {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 720px;
  margin-top: 22px;
}

/* Light rounded panel */
.panel {
  background: var(--panel);
  color: var(--panel-text);
  border-radius: var(--radius);
  padding: 80px 64px;
}

.panel .kicker { color: #555; }
.panel .section-sub { color: #444; }

/* ---------- Results console ---------- */
.console {
  position: relative;
  background: linear-gradient(180deg, rgba(26, 77, 255, 0.07), rgba(26, 77, 255, 0.015)), var(--bg-soft);
  border: 1px solid rgba(95, 131, 255, 0.28);
  border-radius: var(--radius);
  padding: 64px;
  overflow: hidden;
  box-shadow: 0 0 60px rgba(26, 77, 255, 0.07) inset;
}

.console::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(95, 131, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(95, 131, 255, 0.055) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.console > * { position: relative; }

.console-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  flex-wrap: wrap;
}

.console-badge {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: #7d9aff;
  border: 1px solid rgba(95, 131, 255, 0.4);
  border-radius: 999px;
  padding: 7px 16px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
}

.console-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #5f83ff;
  box-shadow: 0 0 8px rgba(95, 131, 255, 0.9);
  animation: console-pulse 2.2s ease-in-out infinite;
}

@keyframes console-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

@media (prefers-reduced-motion: reduce) {
  .console-badge .dot { animation: none; }
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 56px;
}

.metric {
  background: rgba(11, 13, 18, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
  padding: 26px 26px 22px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.25s ease;
}

.metric:hover { border-color: rgba(95, 131, 255, 0.5); }

.metric-label {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.metric-label .src-tag { color: #5f83ff; }

.metric-number {
  margin-top: 16px;
  font-size: clamp(42px, 4vw, 58px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #fff;
  font-variant-numeric: tabular-nums;
}

.metric-number .sign,
.metric-number .unit { color: #5f83ff; }

.metric-number .unit { font-size: 0.42em; font-weight: 700; margin-left: 5px; }

.metric-desc {
  margin-top: 14px;
  font-size: 14.5px;
  color: var(--text-dim);
  line-height: 1.55;
  flex: 1;
}

.metric-spark { margin-top: 18px; }

.metric-spark svg { width: 100%; height: 46px; display: block; }

.console-src {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 14px;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.console-src a { color: #7d9aff; font-weight: 600; }

@media (max-width: 960px) {
  .console { padding: 44px 28px; }
  .metrics { grid-template-columns: 1fr; }
}

/* ---------- Stats ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 56px;
}

.stat {
  border-top: 3px solid var(--accent);
  padding-top: 24px;
}

.stat-number {
  font-size: clamp(40px, 4.5vw, 60px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.stat-desc { margin-top: 16px; font-size: 16px; color: #444; line-height: 1.55; }

.stat-src {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid rgba(0, 0, 0, 0.12);
  font-size: 14px;
  color: #555;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.stat-src a { color: var(--accent); font-weight: 600; }

/* ---------- Icon chips ---------- */
.icon-chip {
  width: 48px;
  height: 48px;
  border-radius: 13px;
  background: rgba(26, 77, 255, 0.14);
  border: 1px solid rgba(26, 77, 255, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.icon-chip svg {
  width: 24px;
  height: 24px;
  stroke: #5f83ff;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.panel .icon-chip { background: rgba(26, 77, 255, 0.08); }
.panel .icon-chip svg { stroke: var(--accent); }

.stat .icon-chip { margin-bottom: 20px; }
.feature .icon-chip { margin-bottom: 18px; }
.tile .icon-chip { margin-bottom: 18px; }

/* ---------- Team role tags ---------- */
.member .role {
  margin-top: 20px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: #5f83ff;
}

.member .role + h3 { margin-top: 6px; }

/* ---------- FAQ ---------- */
.faq { margin-top: 56px; border-top: 1px solid rgba(255, 255, 255, 0.14); }

.faq details { border-bottom: 1px solid rgba(255, 255, 255, 0.14); }

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 24px 40px 24px 0;
  font-size: 18px;
  font-weight: 600;
  position: relative;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  font-weight: 400;
  color: #5f83ff;
  transition: transform 0.2s ease;
}

.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }

.faq details p {
  margin: 0 0 24px;
  color: var(--text-dim);
  max-width: 780px;
  font-size: 16px;
}

/* ---------- Module feature lists ---------- */
.feature-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
}

.feature-list li {
  position: relative;
  padding-left: 22px;
  margin: 8px 0;
  color: var(--text-dim);
  font-size: 15.5px;
}

.feature-list li::before {
  content: "\2192";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.panel .feature-list li { color: #444; }

/* ---------- Audience tiles ---------- */
.tiles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.tile {
  background: var(--bg-soft);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 28px 26px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.tile:hover { border-color: rgba(95, 131, 255, 0.5); transform: translateY(-4px); }

.tile .tile-tag {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #5f83ff;
  margin-bottom: 12px;
}

.tile h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }

.tile p { color: var(--text-dim); font-size: 15px; margin: 0; }

/* ---------- Numbered features ---------- */
.features {
  margin-top: 70px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px 64px;
}

.feature {
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding-top: 28px;
}

.panel .feature { border-top-color: rgba(0, 0, 0, 0.18); }

.feature-num {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 14px;
}

.feature h3 { font-size: 24px; font-weight: 700; margin-bottom: 12px; }

.feature p { color: var(--text-dim); font-size: 16.5px; }

.panel .feature p { color: #444; }

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

/* ---------- Split (image + text) ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.split-img img {
  border-radius: var(--radius);
  width: 100%;
  height: 460px;
  object-fit: cover;
}

/* ---------- Cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 64px;
}

.card {
  background: var(--bg-soft);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.card:hover { transform: translateY(-6px); border-color: rgba(255, 255, 255, 0.2); }

.card img { height: 210px; width: 100%; object-fit: cover; }

.card-body { padding: 28px; }

.card-body h3 { font-size: 21px; font-weight: 700; margin-bottom: 10px; }

.card-body p { color: var(--text-dim); font-size: 15.5px; }

/* ---------- Demo embed ---------- */
.demo-wrap {
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: #1c1e4a;
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
}

.demo-wrap iframe,
.demo-wrap video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  object-fit: cover;
  background: #000;
}

/* ---------- Icon cards ---------- */
.card-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: rgba(26, 77, 255, 0.14);
  border: 1px solid rgba(26, 77, 255, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 32px 0 0 28px;
}

.card-icon svg {
  width: 30px;
  height: 30px;
  stroke: #5f83ff;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- Team ---------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 64px;
}

.member { text-align: left; }

.member img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 20px;
  filter: grayscale(12%);
}

.member h3 { margin-top: 22px; font-size: 21px; font-weight: 700; }

.member p { margin-top: 8px; color: var(--text-dim); font-size: 15px; }

.member .li-link {
  display: inline-flex;
  margin-top: 12px;
  color: var(--accent);
  font-size: 14.5px;
  font-weight: 600;
}

.member .li-link:hover { text-decoration: underline; }

/* ---------- Publications ---------- */
.pubs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 64px;
}

.pub {
  display: flex;
  gap: 24px;
  background: var(--bg-soft);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 24px;
  align-items: center;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.pub:hover { border-color: var(--accent); transform: translateY(-4px); }

.pub img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 14px;
  flex-shrink: 0;
}

.pub h3 { font-size: 16.5px; font-weight: 600; line-height: 1.4; }

.pub .journal { margin-top: 10px; font-size: 14px; color: var(--accent); font-weight: 600; }

/* ---------- CTA ---------- */
.cta .panel {
  text-align: center;
  padding: 90px 64px;
}

.cta h2 { font-size: clamp(32px, 4vw, 52px); font-weight: 800; }

.cta p { margin: 22px auto 40px; max-width: 640px; color: #444; font-size: 18px; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: start;
}

.contact-info h1 {
  font-size: clamp(38px, 5vw, 64px);
  font-weight: 800;
  text-transform: uppercase;
  line-height: 1.05;
}

.contact-info p { margin-top: 28px; font-size: 19px; color: var(--text-dim); }

.contact-meta { margin-top: 48px; font-size: 16px; color: var(--text-dim); }

.contact-meta a { color: #fff; }
.contact-meta a:hover { color: var(--accent); }

form .field { margin-bottom: 22px; }

form label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-dim);
}

form input,
form textarea {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  padding: 14px 16px;
  color: #fff;
  font-family: var(--font);
  font-size: 16px;
  transition: border-color 0.2s;
}

form input:focus,
form textarea:focus { outline: none; border-color: var(--accent); }

form textarea { min-height: 140px; resize: vertical; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }

form button {
  cursor: pointer;
  border: none;
  font-family: var(--font);
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 80px 0 40px;
  background: #0d0d0d;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 48px;
}

.footer-grid h4 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 22px;
  color: #8f8f8f;
}

.footer-grid ul { list-style: none; }

.footer-grid li { margin-bottom: 12px; }

.footer-grid a { color: var(--text-dim); font-size: 15.5px; transition: color 0.2s; }

.footer-grid a:hover { color: #fff; }

.footer-grid p { color: var(--text-dim); font-size: 15.5px; }

.newsletter-form { display: flex; gap: 10px; margin-top: 6px; }

.newsletter-form input {
  flex: 1;
  background: var(--bg-soft);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  padding: 12px 20px;
  color: #fff;
  font-size: 15px;
}

.newsletter-form input:focus { outline: none; border-color: var(--accent); }

.newsletter-form button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 12px 24px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
}

.footer-bottom {
  margin-top: 70px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  color: #9aa3b2;
  font-size: 14px;
}

.footer-tagline {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 14px;
}

.footer-bottom img { height: 20px; opacity: 0.7; }

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .features, .features--3, .cards, .pubs, .team-grid { grid-template-columns: 1fr 1fr; }
  .tiles { grid-template-columns: 1fr 1fr; }
  .split, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr; gap: 40px; }
  .panel { padding: 56px 36px; }
}

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: #121212;
    flex-direction: column;
    gap: 0;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links li { padding: 14px 6%; }
  .nav-toggle { display: block; }
}

@media (max-width: 680px) {
  .features, .features--3, .cards, .pubs, .team-grid, .tiles { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 42px; }
  .hero p { font-size: 17px; }
  section { padding: 64px 0; }
  .footer-bottom { flex-direction: column; }
  .cta .panel { padding: 56px 28px; }
  .split-img img { height: 320px; }
  .stat-src, .console-src { flex-direction: column; gap: 10px; }
  .btn { font-size: 15px; padding: 9px 10px 9px 20px; }
  .btn .btn-arrow { width: 34px; height: 34px; }
}