/* FrontTerrain Design System — Inspired by HappyRobot.ai */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;1,6..72,400&display=swap');

:root {
  --hr-surface: #0b0c10;
  --hr-surface-card: #12141a;
  --hr-surface-hover: #191c24;
  --hr-ink-strong: #f8fafc;
  --hr-ink-muted: #94a3b8;
  --hr-ink-subtle: #64748b;
  --hr-rust: #e15b37;
  --hr-rust-glow: rgba(225, 91, 55, 0.2);
  --hr-cyan: #38bdf8;
  --hr-violet: #818cf8;
  --hr-emerald: #34d399;
  --hr-line: rgba(255, 255, 255, 0.08);
  --hr-line-strong: rgba(255, 255, 255, 0.16);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Newsreader', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  font-size: 16px;
}

body {
  background-color: var(--hr-surface);
  color: var(--hr-ink-strong);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Announcement Top Bar */
.announcement-bar {
  background: var(--hr-rust);
  color: #ffffff;
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.announcement-bar:hover {
  opacity: 0.9;
}

.blink-dot {
  width: 6px;
  height: 6px;
  background-color: #ffffff;
  border-radius: 50%;
  animation: blink 1.4s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

/* Container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(11, 12, 16, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hr-line);
  padding: 1.1rem 0;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--hr-ink-strong);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.brand img {
  height: 28px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
  list-style: none;
}

.nav-link {
  color: var(--hr-ink-muted);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  position: relative;
  padding-bottom: 4px;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--hr-ink-strong);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s cubic-bezier(0.33, 1, 0.68, 1);
}

.nav-link:hover {
  color: var(--hr-ink-strong);
}

.nav-link:hover::after, .nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--hr-ink-strong);
  font-size: 1.5rem;
  cursor: pointer;
  margin-left: auto;
}

/* HappyRobot Buttons */
.hr-btn-primary, .hr-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.hr-btn-primary {
  background: var(--hr-ink-strong);
  color: var(--hr-surface);
  border-color: var(--hr-ink-strong);
}

.hr-btn-primary:hover {
  background: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 255, 255, 0.15);
}

.hr-btn-secondary {
  background: transparent;
  border-color: var(--hr-line-strong);
  color: var(--hr-ink-strong);
}

.hr-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--hr-ink-strong);
}

/* Eyebrow & Badges */
.hr-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--hr-rust);
  margin-bottom: 1rem;
}

.hr-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.65rem;
  border: 1px solid var(--hr-line-strong);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--hr-ink-muted);
}

.badge-live {
  border-color: rgba(52, 211, 153, 0.4);
  color: var(--hr-emerald);
  background: rgba(52, 211, 153, 0.08);
}

.badge-coming {
  border-color: rgba(251, 191, 36, 0.4);
  color: #fbbf24;
  background: rgba(251, 191, 36, 0.08);
}

.badge-sunset {
  border-color: rgba(225, 91, 55, 0.4);
  color: var(--hr-rust);
  background: rgba(225, 91, 55, 0.08);
}

/* Typography */
h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

p {
  color: var(--hr-ink-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* Grid Section Boundaries */
.section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--hr-line);
}

.section-heading {
  margin-bottom: 3.5rem;
  max-width: 760px;
}

/* Card Grids */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* HappyRobot Cards */
.hr-card {
  background: var(--hr-surface-card);
  border: 1px solid var(--hr-line);
  padding: 2rem;
  transition: all 0.3s cubic-bezier(0.33, 1, 0.68, 1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.hr-card:hover {
  background: var(--hr-surface-hover);
  border-color: var(--hr-line-strong);
  transform: translateY(-2px);
}

.hr-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--hr-ink-strong);
  text-decoration: none;
  margin-top: 1.5rem;
  transition: gap 0.2s ease;
}

.hr-card:hover .hr-card-link {
  gap: 0.75rem;
  color: var(--hr-rust);
}

/* Hero Diagram Box (HappyRobot Platform Diagram Style) */
.hero-diagram-container {
  background: var(--hr-surface-card);
  border: 1px solid var(--hr-line-strong);
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.diagram-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--hr-line);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--hr-ink-subtle);
}

.diagram-nodes {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.diagram-node {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--hr-line);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: border-color 0.25s ease;
}

.diagram-node:hover {
  border-color: var(--hr-rust);
}

.diagram-node-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--hr-ink-strong);
}

.diagram-node-status {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--hr-emerald);
}

/* Terminal CLI Window */
.terminal-window {
  background: #07080a;
  border: 1px solid var(--hr-line-strong);
  overflow: hidden;
  margin-top: 1.5rem;
}

.terminal-header {
  background: rgba(255, 255, 255, 0.03);
  padding: 0.75rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--hr-line);
}

.terminal-dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-red { background: #e15b37; }
.dot-yellow { background: #fbbf24; }
.dot-green { background: #34d399; }

.terminal-title {
  margin-left: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--hr-ink-muted);
}

.terminal-body {
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.8;
  color: #e2e8f0;
  overflow-x: auto;
}

.cmd-line { margin-bottom: 0.4rem; display: flex; gap: 0.75rem; }
.cmd-prompt { color: var(--hr-rust); user-select: none; }
.cmd-name { color: var(--hr-cyan); font-weight: 600; }
.cmd-desc { color: var(--hr-ink-subtle); }

/* Input Fields */
.input-field, .textarea-field {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--hr-line);
  background: var(--hr-surface-card);
  color: var(--hr-ink-strong);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  outline: none;
  transition: border-color 0.25s ease;
}

.input-field:focus, .textarea-field:focus {
  border-color: var(--hr-rust);
}

/* Tabs UI */
.tabs-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.tabs-container {
  display: inline-flex;
  background: var(--hr-surface-card);
  border: 1px solid var(--hr-line);
  padding: 4px;
  gap: 4px;
}

.tab-button {
  padding: 0.6rem 1.25rem;
  background: transparent;
  border: none;
  color: var(--hr-ink-muted);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.25s ease;
}

.tab-button.active {
  color: var(--hr-surface);
  background: var(--hr-ink-strong);
}

/* Footer */
.footer {
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--hr-line);
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 3rem;
}

.footer-brand p {
  margin-top: 1rem;
  font-size: 0.9rem;
  max-width: 320px;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-col h4 {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--hr-rust);
  margin-bottom: 1.2rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-col a {
  color: var(--hr-ink-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--hr-ink-strong);
}

.footer-bottom {
  padding: 1.5rem 0 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--hr-ink-subtle);
  border-top: 1px solid var(--hr-line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.profile-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
  align-items: start;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  border-top: 1px solid var(--hr-line);
  padding-top: 1.5rem;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer { grid-template-columns: 1fr; gap: 2.5rem; }
}

@media (max-width: 768px) {
  .section {
    padding: 3rem 0;
  }
  .container {
    padding: 0 1.25rem;
  }
  h1 {
    font-size: clamp(1.9rem, 7.5vw, 2.75rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
  }
  h2 {
    font-size: clamp(1.45rem, 5.5vw, 2.1rem);
    line-height: 1.2;
    margin-bottom: 0.85rem;
  }
  h3 {
    font-size: 1.15rem;
  }
  p {
    font-size: 0.96rem;
    line-height: 1.6;
  }
  .section-heading {
    margin-bottom: 2rem;
  }

  .navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
  }
  .mobile-toggle {
    display: block;
    margin-left: auto;
    background: transparent;
    border: none;
    color: var(--hr-ink-strong);
    font-size: 1.6rem;
    cursor: pointer;
    padding: 0.25rem;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #0b0c10;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: 1.25rem 1.5rem 1.75rem;
    border-bottom: 1px solid var(--hr-line);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    gap: 0.5rem;
    z-index: 9999;
  }
  .nav-links.active {
    display: flex;
    animation: fadeInDown 0.25s ease forwards;
  }
  .nav-link {
    display: block;
    width: 100%;
    padding: 0.75rem 0;
    font-size: 0.85rem;
    letter-spacing: 0.14em;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  .nav-link::after {
    display: none;
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links .hr-btn-primary {
    width: 100%;
    margin-top: 0.75rem;
    text-align: center;
    justify-content: center;
    padding: 0.85rem 1.2rem !important;
    font-size: 0.8rem !important;
  }

  .grid-2, .grid-3, .grid-4, .profile-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

@media (max-width: 640px) {
  .announcement-bar {
    padding: 0.5rem 0.75rem;
    font-size: 0.68rem;
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
    line-height: 1.4;
    gap: 0.4rem;
  }
  .footer {
    padding: 3rem 0 1.5rem;
    gap: 2rem;
  }
  .footer-nav {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
    padding: 1.25rem 0 2rem;
  }
}

@media (max-width: 576px) {
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  .hero-buttons .hr-btn-primary,
  .hero-buttons .hr-btn-secondary {
    width: 100%;
    justify-content: center;
  }
  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }
  .hero-stats-divider {
    border-left: none !important;
    padding-left: 0 !important;
    border-top: 1px solid var(--hr-line) !important;
    padding-top: 0.75rem !important;
  }
  .hr-card {
    padding: 1.35rem;
  }
  .hero-diagram-container {
    padding: 1.25rem;
  }
  .diagram-node {
    padding: 0.85rem 1rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .diagram-node-status {
    align-self: flex-end;
  }
  .terminal-body {
    padding: 1rem;
    font-size: 0.78rem;
  }
  .input-field, .textarea-field {
    padding: 0.75rem 0.9rem;
    font-size: 0.9rem;
  }
  .tabs-container {
    width: 100%;
    flex-direction: column;
  }
  .tab-button {
    width: 100%;
    text-align: center;
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}