/* ==========================================================================
   TeraGrowth — styles.css
   Clean dark. One accent. No gradients, no glow, no decorative motion.
   Sections: tokens · base · buttons · nav · hero · stats · clients ·
   work/videos · services · process · pricing · faq · cta · footer · responsive
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
  --bg: #0A0B0A;
  --surface: #121412;
  --surface-2: #181B18;
  --text: #EDEFEC;
  --text-muted: #9BA19A;
  --accent: #57A65E;
  --accent-hover: #64B56B;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --radius: 8px;
  --font-sans: "Geist", sans-serif;
  --font-mono: "Geist Mono", monospace;
  --section-pad: clamp(72px, 11vw, 136px);
  --ease: cubic-bezier(0.22, 0.7, 0.3, 1);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

h1, h2, h3 { line-height: 1.12; letter-spacing: -0.025em; font-weight: 600; }
h1 { font-size: clamp(2.3rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.2rem); }
h3 { font-size: 1.08rem; }

.container { width: min(1120px, 100% - 48px); margin-inline: auto; }
.container-narrow { width: min(780px, 100% - 48px); }
.section { padding-block: var(--section-pad); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 14px;
}
.lead { color: var(--text-muted); font-size: 1.1rem; max-width: 52ch; }
.section-head { margin-bottom: clamp(40px, 6vw, 60px); }
.section-head .section-sub { color: var(--text-muted); max-width: 56ch; margin-top: 12px; }
.section-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; }

/* ---------- Loader + page entrance ---------- */
html.is-loading, html.is-loading body { overflow: hidden; }
.loader {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  background: var(--bg);
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.loader-inner { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.loader img { width: 48px; height: 48px; border-radius: 10px; }
.loader-bar {
  width: 120px;
  height: 2px;
  border-radius: 2px;
  background: var(--border-strong);
  overflow: hidden;
}
.loader-bar::after {
  content: "";
  display: block;
  width: 40%;
  height: 100%;
  border-radius: 2px;
  background: var(--accent);
  animation: loader-slide 0.75s var(--ease) infinite;
}
@keyframes loader-slide {
  from { transform: translateX(-110%); }
  to { transform: translateX(310%); }
}
html.loaded .loader { opacity: 0; visibility: hidden; pointer-events: none; }

/* Above-the-fold elements fade up once the page is ready. Guarded by .js so a
   JS failure never leaves the hero invisible. */
html.js .enter { opacity: 0; transform: translateY(8px); }
html.loaded .enter {
  opacity: 1;
  transform: none;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
html.loaded .hero-copy .enter:nth-child(1) { transition-delay: 0.02s; }
html.loaded .hero-copy .enter:nth-child(2) { transition-delay: 0.06s; }
html.loaded .hero-copy .enter:nth-child(3) { transition-delay: 0.1s; }
html.loaded .hero-copy .enter:nth-child(4) { transition-delay: 0.14s; }
html.loaded .stats-row { transition-delay: 0.16s; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.94rem;
  padding: 12px 24px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease,
              transform 0.18s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--accent); color: #0A0B0A; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { border-color: var(--border-strong); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--text-muted); background: rgba(255, 255, 255, 0.045); }
.btn-sm { padding: 8px 16px; font-size: 0.88rem; }
.btn-block { width: 100%; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 11, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em; }
.nav-brand img { border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a:not(.btn) {
  position: relative;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.18s ease;
}
.nav-links a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}
.nav-links a:not(.btn):hover { color: var(--text); }
.nav-links a:not(.btn):hover::after { transform: scaleX(1); }
.nav-brand img { transition: transform 0.3s var(--ease); }
.nav-brand:hover img { transform: rotate(-6deg) scale(1.06); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; padding: 8px; cursor: pointer; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: transform 0.2s ease, opacity 0.2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding-block: clamp(88px, 14vw, 160px) clamp(72px, 10vw, 120px); }
.hero-copy { max-width: 640px; }
.hero-copy h1 { margin-bottom: 20px; }
.hero-cta { display: flex; gap: 12px; margin-top: 36px; flex-wrap: wrap; }

/* ---------- Stats ---------- */
.stats { border-block: 1px solid var(--border); }
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); padding-block: 36px; }
.stat { text-align: center; }
.stat + .stat { border-left: 1px solid var(--border); }
.stat-num { display: block; font-family: var(--font-mono); font-weight: 700; font-size: clamp(1.5rem, 3.2vw, 2.1rem); letter-spacing: -0.02em; }
.stat-label { color: var(--text-muted); font-size: 0.86rem; }

/* ---------- Clients slider (3 per view) ---------- */
.slider-nav { display: flex; gap: 8px; flex-shrink: 0; }
.slider-btn {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease, opacity 0.18s ease;
}
.slider-btn svg { width: 16px; height: 16px; }
.slider-btn:hover:not(:disabled) { color: var(--text); border-color: var(--border-strong); background: var(--surface); }
.slider-btn:disabled { opacity: 0.3; cursor: default; }

.logo-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.logo-track::-webkit-scrollbar { display: none; }
.logo-item {
  flex: 0 0 calc((100% - 32px) / 3);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.28s var(--ease);
}
.logo-item:hover { border-color: var(--border-strong); background: var(--surface-2); transform: translateY(-3px); }
.logo-item img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  border-radius: 8px;
  image-rendering: pixelated;
  opacity: 0.72;
  filter: grayscale(0.55);
  transition: opacity 0.25s ease, filter 0.25s ease, transform 0.28s var(--ease);
}
.logo-item img.smooth { image-rendering: auto; }
.logo-item:hover img { opacity: 1; filter: grayscale(0); transform: scale(1.05); }
.logo-item span {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.2s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}
.logo-item:hover span { color: var(--text); }

.slider-dots { display: flex; gap: 8px; margin-top: 22px; }
.slider-dots button {
  width: 22px;
  height: 3px;
  padding: 0;
  border: none;
  border-radius: 2px;
  background: var(--border-strong);
  cursor: pointer;
  transition: background 0.2s ease, width 0.25s var(--ease);
}
.slider-dots button:hover { background: var(--text-muted); }
.slider-dots button[aria-current="true"] { background: var(--accent); width: 34px; }

.more-line { margin-top: 24px; color: var(--text-muted); font-size: 0.92rem; }

/* ---------- Work / video grids ---------- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 16px;
}
/* 8 examples read best as two even rows of four */
.examples .video-grid { grid-template-columns: repeat(4, 1fr); }
.video-card {
  position: relative;
  aspect-ratio: 9 / 16;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.3s var(--ease);
}
.video-card:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.video-card-static { cursor: default; }
.video-card video, .video-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.video-card:hover video, .video-card:hover img { transform: scale(1.05); }
.video-card.playing video { transform: none; }
.video-views {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 2;
  background: rgba(10, 11, 10, 0.8);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  pointer-events: none;
}
.video-play {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  background: linear-gradient(transparent 60%, rgba(10, 11, 10, 0.6));
  transition: opacity 0.15s ease;
  pointer-events: none;
}
.video-play::after {
  content: "";
  width: 48px;
  height: 48px;
  border-radius: 50%;
  transition: transform 0.28s var(--ease);
  background: rgba(237, 239, 236, 0.94) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%230A0B0A'%3E%3Cpath d='M8 5v14l11-7z'/%3E%3C/svg%3E") center / 24px no-repeat;
}
.video-card:hover .video-play::after { transform: scale(1.1); }
.video-card.playing .video-play { opacity: 0; }

/* ---------- Services ---------- */
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.28s var(--ease);
}
.card:hover { border-color: var(--border-strong); background: var(--surface-2); transform: translateY(-3px); }
.card-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--accent);
  margin-bottom: 18px;
  transition: border-color 0.25s ease, background 0.25s ease;
}
.card:hover .card-icon { border-color: var(--accent); background: rgba(87, 166, 94, 0.1); }
.card-icon svg { width: 20px; height: 20px; transition: transform 0.35s var(--ease); }
.card:hover .card-icon svg { transform: scale(1.12); }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--text-muted); font-size: 0.92rem; }

/* ---------- Process ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step {
  position: relative;
  border-top: 1px solid var(--border-strong);
  padding-top: 20px;
}
/* accent line sweeps across the step's top rule on hover */
.step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.step:hover::before { transform: scaleX(1); }
.step-num { font-family: var(--font-mono); font-weight: 700; font-size: 0.8rem; color: var(--accent); }
.step h3 { margin: 10px 0 6px; }
.step p { color: var(--text-muted); font-size: 0.92rem; transition: color 0.25s ease; }
.step:hover p { color: var(--text); }

/* ---------- Pricing ---------- */
.tiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-items: stretch; }
.tier {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.28s var(--ease);
}
.tier:hover { border-color: var(--border-strong); background: var(--surface-2); transform: translateY(-4px); }
.tier-featured { border-color: var(--accent); }
.tier-featured:hover { border-color: var(--accent-hover); }
.tier-badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 3px 10px;
  margin-bottom: 14px;
}
.tier h3 { font-size: 1.2rem; }
.tier-desc { color: var(--text-muted); font-size: 0.9rem; margin: 6px 0 18px; }
.tier-price { font-family: var(--font-mono); font-weight: 700; font-size: 1.9rem; letter-spacing: -0.02em; margin-bottom: 20px; }
.tier-per { font-family: var(--font-sans); font-size: 0.9rem; color: var(--text-muted); font-weight: 500; margin-left: 6px; }
.tier ul { flex: 1; margin-bottom: 24px; display: grid; gap: 10px; align-content: start; }
.tier li { color: var(--text-muted); font-size: 0.92rem; padding-left: 24px; position: relative; }
.tier li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ---------- FAQ ---------- */
.faq-list { border-top: 1px solid var(--border); }
.faq-list details { border-bottom: 1px solid var(--border); }
.faq-list summary {
  cursor: pointer;
  font-weight: 500;
  padding: 20px 36px 20px 0;
  list-style: none;
  position: relative;
  transition: color 0.2s ease, padding-left 0.25s var(--ease);
}
.faq-list summary:hover { padding-left: 6px; }
.faq-list summary:hover::after { color: var(--accent); }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.25rem;
  font-weight: 400;
  transition: transform 0.25s var(--ease), color 0.2s ease;
}
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-list details p { color: var(--text-muted); font-size: 0.95rem; padding-bottom: 20px; max-width: 62ch; }

/* ---------- Final CTA ---------- */
.cta-final { padding-top: 0; }
.cta-panel {
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: clamp(48px, 7vw, 72px) 32px;
}
.cta-panel h2 { margin-bottom: 10px; }
.cta-panel p { color: var(--text-muted); margin-bottom: 28px; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); }
.footer-grid { display: flex; justify-content: space-between; align-items: flex-start; gap: 32px; padding-block: 48px 32px; flex-wrap: wrap; }
.footer-brand p { color: var(--text-muted); font-size: 0.9rem; margin-top: 12px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a { position: relative; color: var(--text-muted); font-size: 0.9rem; transition: color 0.18s ease; }
.footer-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}
.footer-links a:hover { color: var(--text); }
.footer-links a:hover::after { transform: scaleX(1); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-block: 20px; border-top: 1px solid var(--border); }
.footer-bottom p { color: var(--text-muted); font-size: 0.8rem; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html, .logo-track { scroll-behavior: auto; }
  .loader { display: none; }
  html.js .enter { opacity: 1; transform: none; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .btn:hover, .card:hover, .tier:hover, .video-card:hover, .logo-item:hover { transform: none; }
  .video-card:hover video, .video-card:hover img, .card:hover .card-icon svg { transform: none; }
  .step::before, .nav-links a:not(.btn)::after, .footer-links a::after { transform: scaleX(0); }
  .step:hover::before, .nav-links a:not(.btn):hover::after, .footer-links a:hover::after { transform: scaleX(1); }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .cards-4, .steps { grid-template-columns: repeat(2, 1fr); }
  .tiers { grid-template-columns: 1fr; max-width: 460px; margin-inline: auto; }
  .video-grid, .examples .video-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .logo-item { flex-basis: calc((100% - 16px) / 2); }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(10, 11, 10, 0.97);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 20px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a:not(.btn) { padding: 12px 0; }
  .nav-links .btn { margin-top: 12px; }
  .stats-row { padding-block: 28px; }
  .section-head-row { flex-direction: column; align-items: flex-start; gap: 20px; }
}

@media (max-width: 480px) {
  .cards-4, .steps { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; gap: 20px; }
  .stat + .stat { border-left: none; border-top: 1px solid var(--border); padding-top: 20px; }
  .logo-item { flex-basis: 100%; padding: 24px; }
  /* 1-up means one dot per client — keep the row from running out of width */
  .slider-dots { gap: 6px; }
  .slider-dots button { width: 13px; }
  .slider-dots button[aria-current="true"] { width: 22px; }
}