/* ==========================================================================
   sibansal · Dark Teal Theme — Design Tokens & Core Styles
   Extracted from sibansal/portfolio v3.0 & tailored for OneSync
   ========================================================================== */

:root {
  --bg: #061316;
  --bg-surface: #080e1a;
  --bg-surface-elevated: #0d1726;
  --bg-strip: #060b11;
  --bg-pill: rgba(8, 22, 36, 0.85);

  --primary: #538e97;
  --primary-hover: #65a7b1;
  --primary-active: #44777f;

  --accent-100: #DCEBED;
  --accent-200: #BDD7DB;
  --accent-300: #9CC2C8;
  --accent-400: #79AAB2;
  --accent-500: #4F8C96;
  --accent-600: #437882;
  --accent-700: #37666D;
  --accent-800: #294C52;

  --card-border: rgba(32, 160, 160, 0.35);
  --card-border-subtle: rgba(32, 160, 160, 0.18);
  --strip-border: rgba(32, 160, 160, 0.25);
  --border-slate-800: #1e293b;
  --border-slate-700: #334155;

  --text-main: #f8fafc;
  --text-secondary: #c8d8e4;
  --text-muted: #94a3b8;
  --text-pill: #7ecece;

  --dot-green: #34d399;
  --dot-green-glow: 0 0 8px 2px rgba(52, 211, 153, 0.55);
  --dot-yellow: #d3b634;
  --dot-yellow-glow: 0 0 8px 2px rgba(211, 182, 52, 0.55);

  --glow-primary: 0 0 24px rgba(83, 142, 151, 0.35);
  --glow-primary-strong: 0 0 36px rgba(83, 142, 151, 0.6);
  --card-shadow: 0 20px 60px -10px rgba(10, 25, 30, 0.7), 0 0 1px 1px rgba(32, 160, 160, 0.2);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --max-w-content: 1200px;
  --header-height: 72px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* Base resets & layout */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  background-color: var(--bg);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

::selection {
  background-color: var(--primary);
  color: #ffffff;
}

/* Background grid and glows */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}

.blob-tl {
  position: fixed;
  top: -15%;
  left: -10%;
  width: 55vw;
  height: 55vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(67, 120, 130, 0.16) 0%, rgba(67, 120, 130, 0) 70%);
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}

.blob-br {
  position: fixed;
  bottom: -15%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 140, 150, 0.14) 0%, rgba(79, 140, 150, 0) 70%);
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}

/* Layout shell */
.page-shell {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: var(--max-w-content);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background: rgba(6, 19, 22, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(32, 160, 160, 0.15);
  display: flex;
  align-items: center;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--card-border);
  background: rgba(6, 19, 22, 0.94);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  box-shadow: 0 0 12px rgba(83, 142, 151, 0.4);
  display: block;
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  background: rgba(83, 142, 151, 0.18);
  color: var(--accent-300);
  border: 1px solid rgba(83, 142, 151, 0.3);
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.925rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-100);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Button components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.925rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 0 20px rgba(132, 190, 194, 0.3);
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 0 32px rgba(132, 190, 194, 0.55);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(8, 22, 36, 0.9);
  color: var(--text-secondary);
  border-color: var(--card-border);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: #ffffff;
  background: rgba(13, 30, 48, 0.95);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  color: var(--accent-100);
  background: rgba(83, 142, 151, 0.1);
}

.btn-lg {
  padding: 0.8rem 1.75rem;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* Mobile menu toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
}

/* Monospace Tags & Status Pills */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  border-radius: var(--radius-sm);
  background: var(--bg-pill);
  color: var(--text-pill);
  border: 1px solid var(--card-border-subtle);
  letter-spacing: -0.01em;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.status-dot.green {
  background-color: var(--dot-green);
  box-shadow: var(--dot-green-glow);
}

.status-dot.yellow {
  background-color: var(--dot-yellow);
  box-shadow: var(--dot-yellow-glow);
}

/* Section Headings */
.section-heading {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.section-heading .bar {
  width: 2rem;
  height: 4px;
  border-radius: 9999px;
  background-color: var(--primary);
  flex-shrink: 0;
}

.section-heading h2 {
  font-size: 2rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.section-heading p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Hero Section */
.hero-section {
  padding: 5rem 0 3.5rem;
  text-align: center;
  position: relative;
}

.hero-pill-wrap {
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: center;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.035em;
  color: #ffffff;
  max-width: 900px;
  margin: 0 auto 1.5rem;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #ffffff 20%, var(--accent-200) 60%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 740px;
  margin: 0 auto 2.5rem;
  line-height: 1.65;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero-specs-strip {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.75rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.hero-spec-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Screenshots / Visual Showcase */
.showcase-section {
  padding: 2rem 0 5rem;
}

.showcase-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.showcase-tabs {
  display: inline-flex;
  background: var(--bg-surface);
  border: 1px solid var(--card-border-subtle);
  border-radius: var(--radius-md);
  padding: 0.35rem;
  gap: 0.35rem;
  margin-top: 1rem;
}

.showcase-tab {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.showcase-tab.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 0 14px rgba(83, 142, 151, 0.4);
}

.showcase-window {
  background: var(--bg-surface);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 25px 70px -15px rgba(0, 0, 0, 0.8), 0 0 30px rgba(32, 160, 160, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.window-header {
  background: var(--bg-strip);
  border-bottom: 1px solid var(--strip-border);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.window-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.control-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot-red { background: #ff5f56; }
.dot-yellow-mac { background: #ffbd2e; }
.dot-green-mac { background: #27c93f; }

.window-title {
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--accent-300);
}

.window-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.window-viewport {
  position: relative;
  background: #000000;
  display: block;
}

.window-image {
  width: 100%;
  height: auto;
  display: block;
  transition: opacity 0.25s ease;
}

.window-caption {
  background: var(--bg-strip);
  border-top: 1px solid var(--strip-border);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Feature Grid */
.features-section {
  padding: 4rem 0 5rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--card-border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--card-border);
  box-shadow: 0 16px 40px -10px rgba(83, 142, 151, 0.2);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(83, 142, 151, 0.12);
  border: 1px solid rgba(83, 142, 151, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-200);
  margin-bottom: 1.25rem;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.feature-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Architecture & Safety Section */
.arch-section {
  padding: 4rem 0 5rem;
}

.arch-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.terminal-card {
  background: #040a0c;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  font-family: var(--font-mono);
}

.terminal-header {
  background: #060e12;
  border-bottom: 1px solid rgba(32, 160, 160, 0.25);
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--accent-400);
}

.terminal-body {
  padding: 1.25rem;
  font-size: 0.85rem;
  line-height: 1.7;
  color: #cbd5e1;
}

.terminal-line {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.4rem;
}

.terminal-prompt {
  color: var(--primary);
  user-select: none;
}

.terminal-comment {
  color: #64748b;
}

.terminal-highlight {
  color: var(--accent-100);
}

.terminal-success {
  color: #34d399;
}

.terminal-warning {
  color: #fbbf24;
}

/* Steps / Workflow timeline */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.step-item {
  display: flex;
  gap: 1.25rem;
}

.step-num {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
  box-shadow: 0 0 10px rgba(83, 142, 151, 0.2);
}

.step-content h3 {
  font-size: 1.1rem;
  color: #ffffff;
  margin-bottom: 0.35rem;
}

.step-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Call to Action Banner */
.cta-section {
  padding: 4rem 0 6rem;
}

.cta-box {
  background: linear-gradient(135deg, rgba(8, 22, 36, 0.95) 0%, rgba(6, 19, 22, 0.9) 100%);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: 3.5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px -15px rgba(83, 142, 151, 0.25);
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(83, 142, 151, 0.25) 0%, transparent 70%);
  filter: blur(50px);
  pointer-events: none;
}

.cta-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.cta-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 620px;
  margin: 0 auto 2rem;
}

/* Standalone Legal & Documentation Pages */
.legal-page-header {
  padding: 4rem 0 2.5rem;
  border-bottom: 1px solid rgba(32, 160, 160, 0.2);
  margin-bottom: 3rem;
}

.legal-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.legal-breadcrumb a {
  color: var(--accent-300);
  text-decoration: none;
}

.legal-breadcrumb a:hover {
  text-decoration: underline;
}

.legal-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.legal-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-family: var(--font-mono);
}

.legal-content {
  max-width: 860px;
  margin: 0 auto 5rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.legal-content h2 {
  font-size: 1.5rem;
  color: #ffffff;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-slate-800);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.legal-content h3 {
  font-size: 1.15rem;
  color: var(--accent-100);
  margin: 1.5rem 0 0.5rem;
}

.legal-content p {
  margin-bottom: 1.25rem;
}

.legal-content ul, .legal-content ol {
  margin: 0 0 1.5rem 1.5rem;
}

.legal-content li {
  margin-bottom: 0.5rem;
}

.legal-content a {
  color: var(--accent-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.legal-content a:hover {
  color: #ffffff;
}

.legal-box {
  background: var(--bg-surface);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.75rem 0;
}

.legal-box.highlight {
  border-left: 4px solid var(--primary);
}

.license-block {
  background: #04090c;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.7;
  color: #e2e8f0;
  white-space: pre-wrap;
  margin: 1.5rem 0;
  overflow-x: auto;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background: var(--bg-strip);
  border-top: 1px solid var(--strip-border);
  padding: 3.5rem 0 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand h4 {
  color: #ffffff;
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  max-width: 320px;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.footer-col h5 {
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

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

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.15s ease;
}

.footer-link:hover {
  color: var(--accent-100);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
}

.footer-author a {
  color: var(--accent-300);
  text-decoration: none;
  font-weight: 600;
}

.footer-author a:hover {
  color: #ffffff;
  text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .arch-container {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--card-border);
    padding: 1.5rem;
    gap: 1.25rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
}