/* ============================================
   BASELINE — Yeezy-Inspired Brutalist System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  /* Colors — from design-tokens.json */
  --primary: #1F2937;
  --accent: #4B5563;
  --bg: #FFFFFF;
  --surface: #F9FAFB;
  --text: #000000;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  --border: #E5E7EB;
  --link: #4B5563;

  /* Typography */
  --font: 'IBM Plex Mono', monospace;
  --fs-h1: 16px;
  --fs-h2: 16.8px;
  --fs-body: 16px;
  --fs-small: 12px;
  --fs-xs: 10px;
  --fw-normal: 400;
  --fw-medium: 500;
  --fw-bold: 700;
  --ls: 0.05em;
  --ls-wide: 0.1em;
  --lh: 1.5;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 32px;
  --space-xl: 64px;
  --space-2xl: 128px;
  --section-pad: 64px 16px;

  /* Borders */
  --radius: 0px;
  --border-w: 1px;
  --border-style: solid;
  --border-color: #E5E7EB;

  /* Effects */
  --shadow: none;
  --transition: all 0.3s ease;
  --hover-opacity: 0.6;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --max-w: 1200px;
  --grid-cols: 4;
  --grid-gap: 0px;
  --container-pad: 16px;

  /* Nav */
  --nav-h: 64px;
  --nav-bg: #FFFFFF;
  --nav-z: 99;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  font-size: var(--fs-body);
  font-weight: var(--fw-normal);
  line-height: var(--lh);
  color: var(--text);
  background: var(--bg);
  letter-spacing: var(--ls);
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

/* ---- UTILITIES ---- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.uppercase { text-transform: uppercase; }
.mono { font-family: var(--font); }

/* Scroll-reveal animation — progressive enhancement only */
.reveal {
  opacity: 1;
  transform: translateY(0);
}
.reveal.js-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.reveal.js-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal.js-reveal { opacity: 1; transform: none; transition: none; }
}

/* ============================================
   NAV
   ============================================ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-h);
  background: var(--nav-bg);
  z-index: var(--nav-z);
  border-bottom: var(--border-w) var(--border-style) var(--border-color);
  display: flex;
  align-items: center;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.nav-logo {
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

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

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

.nav-links a {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: var(--transition);
}

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

.nav-cta {
  font-size: var(--fs-xs) !important;
  font-weight: var(--fw-bold) !important;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--bg) !important;
  background: var(--text);
  padding: 10px 20px;
  border: var(--border-w) solid var(--text);
  border-radius: var(--radius);
  transition: var(--transition);
  display: inline-block;
}

.nav-cta:hover {
  background: var(--bg);
  color: var(--text) !important;
}

/* Hamburger */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 32px;
  height: 32px;
  gap: 5px;
  cursor: pointer;
  z-index: 101;
}

.mobile-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  transition: transform 0.3s var(--ease-out), opacity 0.2s ease;
  transform-origin: center;
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}
.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  padding-top: calc(var(--nav-h) + var(--space-xl));
  padding-bottom: var(--space-xl);
  border-bottom: var(--border-w) var(--border-style) var(--border-color);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.hero-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: var(--fw-bold);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.15;
  text-wrap: balance;
}

.hero-subtitle {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 480px;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  padding: 14px 28px;
  border: var(--border-w) solid var(--text);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

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

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

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

.btn--muted {
  border-color: var(--border-color);
  color: var(--text-muted);
}

.btn--muted:hover {
  border-color: var(--text-muted);
  background: var(--surface);
  color: var(--text-secondary);
}

.hero-media {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-media img {
  max-height: 520px;
  width: auto;
  object-fit: contain;
}

/* ============================================
   FEATURES
   ============================================ */
.features {
  padding: var(--section-pad);
  border-bottom: var(--border-w) var(--border-style) var(--border-color);
}

.section-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.feature-card {
  padding: var(--space-lg);
  border-right: var(--border-w) var(--border-style) var(--border-color);
}

.feature-card:last-child {
  border-right: none;
}

.feature-number {
  font-size: var(--fs-xs);
  font-weight: var(--fw-normal);
  color: var(--text-muted);
  letter-spacing: var(--ls-wide);
  margin-bottom: var(--space-lg);
}

.feature-title {
  font-size: var(--fs-body);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls);
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.feature-desc {
  font-size: var(--fs-small);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   HOW IT WORKS
   ============================================ */
.how-it-works {
  padding: var(--section-pad);
  background: var(--surface);
  border-bottom: var(--border-w) var(--border-style) var(--border-color);
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-lg);
  align-items: baseline;
  padding: var(--space-lg) 0;
  border-bottom: var(--border-w) var(--border-style) var(--border-color);
}

.step:last-child {
  border-bottom: none;
}

.step-number {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: var(--fw-bold);
  color: var(--border-color);
  letter-spacing: -0.02em;
  line-height: 1;
}

.step-text {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  line-height: 1.7;
  padding-top: var(--space-sm);
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
  padding: var(--space-2xl) var(--container-pad);
  text-align: center;
  border-bottom: var(--border-w) var(--border-style) var(--border-color);
}

.cta-title {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls);
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
  line-height: 1.2;
  text-wrap: balance;
}

.cta-subtitle {
  font-size: var(--fs-small);
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  padding: var(--space-xl) var(--container-pad);
  background: var(--bg);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-w);
  margin: 0 auto;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-brand {
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

.footer-copy {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: var(--ls);
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-links a {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  transition: var(--transition);
}

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

/* ============================================
   RESPONSIVE — TABLET (max-width: 1024px)
   ============================================ */
@media (max-width: 1024px) {
  .nav-logo img {
    max-height: 24px;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    width: 100%;
    background: var(--bg);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-lg);
    border-bottom: var(--border-w) var(--border-style) var(--border-color);
    z-index: 98;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    color: var(--text);
    font-size: var(--fs-small);
  }

  .nav-cta {
    width: 100%;
    text-align: center;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .hero-media {
    order: -1;
  }

  .hero-media img {
    max-height: 380px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .feature-card {
    border-right: none;
    border-bottom: var(--border-w) var(--border-style) var(--border-color);
  }

  .feature-card:last-child {
    border-bottom: none;
  }

  .step {
    grid-template-columns: 80px 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: var(--space-lg);
    text-align: center;
  }
}

/* ============================================
   RESPONSIVE — MOBILE (max-width: 640px)
   ============================================ */
@media (max-width: 640px) {
  :root {
    --container-pad: 16px;
  }

  .hero {
    padding-top: calc(var(--nav-h) + var(--space-lg));
    padding-bottom: var(--space-lg);
  }

  .hero-title {
    font-size: clamp(22px, 6vw, 28px);
  }

  .hero-subtitle {
    font-size: 14px;
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .hero-media img {
    max-height: 280px;
  }

  .step {
    grid-template-columns: 60px 1fr;
    gap: var(--space-md);
  }

  .step-number {
    font-size: 32px;
  }

  .cta-section {
    padding: var(--space-xl) var(--container-pad);
  }

  .cta-title {
    font-size: 22px;
  }

  .footer-links {
    flex-direction: column;
    gap: var(--space-md);
  }
}