/* ==============================================
   OTOMET AI — STYLESHEET
   ============================================== */


/* ─── 1. VARIABLES & DESIGN TOKENS ─────────────── */

:root {
  /* Colors */
  --color-bg:             #0A0A0A;
  --color-surface:        #111111;
  --color-border:         #1F1F1F;
  --color-border-hover:   #FFFFFF;
  --color-text-primary:   #FFFFFF;
  --color-text-secondary: #888888;
  --color-accent:         #FFFFFF;
  --color-grid:           #1A1A1A;

  /* Spacing scale */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  16px;
  --space-4:  24px;
  --space-5:  32px;
  --space-6:  48px;
  --space-7:  64px;
  --space-8:  96px;
  --space-9:  128px;

  /* Typography */
  --font:            'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --weight-light:    300;
  --weight-regular:  400;
  --weight-medium:   500;
  --tracking-wide:   0.05em;
  --tracking-wider:  0.12em;
  --tracking-widest: 0.15em;

  /* Layout */
  --container-max: 1200px;
  --nav-height:    64px;

  /* Transitions */
  --t-fast: 150ms ease;
  --t-base: 300ms ease;
  --t-slow: 600ms ease;
}


/* ─── 2. RESET & BASE ───────────────────────────── */

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

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

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

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

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

ul {
  list-style: none;
}

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

input,
textarea {
  font-family: var(--font);
}


/* ─── 3. TYPOGRAPHY ─────────────────────────────── */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-wide);
  line-height: 1.15;
}

p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.75;
}


/* ─── 4. LAYOUT UTILITIES ───────────────────────── */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.section {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
}

.section-label {
  display: block;
  font-size: 0.6875rem;
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-widest);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.section-heading {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-7);
  max-width: 600px;
}


/* ─── 5. COMPONENTS — BUTTONS ───────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px var(--space-5);
  font-size: 0.875rem;
  font-weight: var(--weight-regular);
  letter-spacing: 0.02em;
  border-radius: 2px;
  transition:
    background-color var(--t-fast),
    color var(--t-fast),
    border-color var(--t-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-text-primary);
  color: var(--color-bg);
  border: 1px solid var(--color-text-primary);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-text-primary);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-text-primary);
}

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

.btn-full {
  width: 100%;
}


/* ─── 6. COMPONENTS — STAT CARDS ────────────────── */

.stat-card {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  transition: border-color var(--t-fast);
}

.stat-card:hover {
  border-color: var(--color-border-hover);
}

.stat-value {
  display: block;
  font-size: 1.875rem;
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-primary);
  line-height: 1;
}

.stat-label {
  display: block;
  font-size: 0.6875rem;
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.stat-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}


/* ─── 7. COMPONENTS — FORMS ─────────────────────── */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.form-input {
  background-color: var(--color-surface);
  border: 1px solid var(--color-text-primary);
  color: var(--color-text-primary);
  padding: 11px var(--space-4);
  font-size: 0.875rem;
  font-weight: var(--weight-regular);
  border-radius: 2px;
  width: 100%;
  outline: none;
  -webkit-appearance: none;
  transition:
    background-color var(--t-fast),
    border-color var(--t-fast);
}

.form-input::placeholder {
  color: var(--color-text-secondary);
}

.form-input:focus {
  background-color: #161616;
  border-color: var(--color-text-primary);
}

.form-input.has-error {
  border-color: var(--color-text-primary);
  background-color: rgba(255, 255, 255, 0.03);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

.form-error {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  min-height: 1rem;
  display: block;
}

.form-success {
  margin-top: var(--space-3);
  font-size: 0.875rem;
  color: var(--color-text-primary);
  text-align: center;
  min-height: 1.25rem;
}


/* ─── 8. COMPONENTS — TECH BADGES ───────────────── */

.tech-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: var(--weight-regular);
  color: var(--color-text-secondary);
  white-space: nowrap;
  flex-shrink: 0;
  transition:
    border-color var(--t-fast),
    color var(--t-fast);
  cursor: default;
}

.tech-badge:hover {
  border-color: var(--color-text-primary);
  color: var(--color-text-primary);
}


/* ─── 9. NAVBAR ──────────────────────────────────── */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(10, 10, 10, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: transform var(--t-base);
}

.navbar.nav-hidden {
  transform: translateY(-100%);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.nav-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.logo-img {
  height: 36px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color var(--t-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* hamburger button */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: var(--space-1);
  flex-shrink: 0;
}

.toggle-line {
  display: block;
  width: 100%;
  height: 1px;
  background-color: var(--color-text-primary);
  transform-origin: center;
  transition:
    transform var(--t-fast),
    opacity var(--t-fast);
}

.nav-toggle.is-open .toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open .toggle-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-toggle.is-open .toggle-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* mobile drawer */
.mobile-menu {
  display: none;
  padding: var(--space-5) var(--space-5) var(--space-6);
  border-top: 1px solid var(--color-border);
  background-color: rgba(10, 10, 10, 0.97);
}

.mobile-menu.is-open {
  display: block;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-5);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-3) 0;
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  transition: color var(--t-fast);
}

.mobile-nav-link:hover {
  color: var(--color-text-primary);
}

.mobile-cta {
  width: fit-content;
}


/* ─── 10. HERO SECTION ───────────────────────────── */

.section-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-9) var(--space-5) var(--space-8);
  overflow: hidden;
}

/* subtle grid background */
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 60px 60px;
  /* fade toward edges */
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 30%, transparent 100%);
  mask-image:         radial-gradient(ellipse 80% 70% at 50% 50%, #000 30%, transparent 100%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
}

.hero-icon {
  width: 88px;
  height: 88px;
  opacity: 0.9;
  margin-bottom: var(--space-1);
}

.hero-icon-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.hero-heading {
  font-size: clamp(3.25rem, 8vw, 6.5rem);
  font-weight: var(--weight-light);
  letter-spacing: 0.03em;
  line-height: 1.05;
  color: var(--color-text-primary);
}

.hero-subheading {
  font-size: clamp(1rem, 2vw, 1.1875rem);
  color: var(--color-text-secondary);
  max-width: 460px;
  letter-spacing: 0.02em;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
  margin-top: var(--space-2);
}


/* ─── 11. ABOUT SECTION ──────────────────────────── */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: start;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}


/* ─── 12. SERVICES SECTION ───────────────────────── */

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.service-card {
  padding: var(--space-5) var(--space-5) var(--space-6);
  border: 1px solid var(--color-border);
  background-color: transparent;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition:
    border-color var(--t-fast),
    background-color var(--t-fast);
  cursor: default;
}

.service-card:hover {
  border-color: var(--color-border-hover);
  background-color: var(--color-surface);
}

.service-icon {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1;
  display: block;
}

.service-name {
  font-size: 0.9375rem;
  font-weight: var(--weight-regular);
  letter-spacing: 0.02em;
  color: var(--color-text-primary);
}

.service-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}


/* ─── 13. TECHNOLOGIES SECTION ───────────────────── */

.tech-badges-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin-bottom: var(--space-7);
  /* fade overflow at right edge */
  -webkit-mask-image: linear-gradient(to right, #000 80%, transparent 100%);
  mask-image:         linear-gradient(to right, #000 80%, transparent 100%);
}

.tech-badges-wrapper::-webkit-scrollbar {
  display: none;
}

.tech-badges {
  display: flex;
  gap: var(--space-2);
  padding-bottom: var(--space-1);
  width: max-content;
}

.tech-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  padding-top: var(--space-7);
  border-top: 1px solid var(--color-border);
}

.tech-feature {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  transition: border-color var(--t-fast);
}

.tech-feature:hover {
  border-color: var(--color-border-hover);
}

.tech-feature-title {
  font-size: 1rem;
  font-weight: var(--weight-regular);
  letter-spacing: 0.03em;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.tech-feature-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}


/* ─── 14. JOIN US SECTION ────────────────────────── */

.join-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.join-card {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.join-card-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.join-card-eyebrow {
  font-size: 0.6875rem;
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-widest);
  color: var(--color-text-secondary);
  text-transform: uppercase;
}

.join-card-title {
  font-size: 1.375rem;
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-wide);
  line-height: 1.3;
  color: var(--color-text-primary);
}

.join-card-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.waitlist-form {
  display: flex;
  flex-direction: column;
}

.careers-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}


/* ─── 15. CONTACT SECTION ────────────────────────── */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-8);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding-top: var(--space-2);
}

.contact-info-title {
  font-size: 1.375rem;
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-primary);
}

.contact-info-desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.contact-detail-label {
  font-size: 0.6875rem;
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.contact-detail-value {
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  transition: color var(--t-fast);
}

a.contact-detail-value:hover {
  color: var(--color-text-secondary);
}

.contact-form {
  display: flex;
  flex-direction: column;
}


/* ─── 16. FOOTER ─────────────────────────────────── */

.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-6) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.footer-logo {
  height: 20px;
  width: auto;
}

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

.footer-meta {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

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

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.footer-link {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  transition: color var(--t-fast);
}

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


/* ─── 17. FADE-IN ANIMATION ──────────────────────── */

.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity var(--t-slow) ease,
    transform var(--t-slow) ease;
}

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

/* hero stagger delays */
.delay-1 { transition-delay: 120ms; }
.delay-2 { transition-delay: 300ms; }
.delay-3 { transition-delay: 480ms; }
.delay-4 { transition-delay: 660ms; }


/* ─── 18. RESPONSIVE — TABLET (≤1024px) ──────────── */

@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .tech-features {
    grid-template-columns: 1fr;
  }
}


/* ─── 19. RESPONSIVE — MOBILE (≤640px) ───────────── */

@media (max-width: 640px) {
  .container {
    padding: 0 var(--space-4);
  }

  .section {
    padding: var(--space-7) 0;
  }

  .section-heading {
    margin-bottom: var(--space-6);
  }

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

  .about-stats {
    grid-template-columns: 1fr;
  }

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

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .footer-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-heading {
    letter-spacing: 0.02em;
  }

  .tech-badges-wrapper {
    -webkit-mask-image: none;
    mask-image: none;
  }
}