/* ==========================================================================
   Beniamin Levin - Personal Website Stylesheet
   Modern, Sleek, High-End Minimalist Developer Aesthetic (Inspired by vladis.ai)
   ========================================================================== */

:root {
  --bg: #090c10;
  --bg-surface: #0f141c;
  --bg-card: #151b23;
  --bg-card-hover: #1c2430;
  --bg-glass: rgba(15, 20, 28, 0.85);
  
  --rule: #212836;
  --rule-light: #303b4d;
  
  --ink: #f0f6fc;
  --ink-soft: #8b949e;
  --ink-muted: #6e7681;
  
  --accent-primary: #38bdf8;
  --accent-primary-rgb: 56, 189, 248;
  --accent-secondary: #818cf8;
  --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  
  --mark-bg: rgba(56, 189, 248, 0.12);
  --mark-ink: #38bdf8;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --nav-height: 72px;
  --container-max: 1100px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light theme support */
[data-theme="light"] {
  --bg: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #f1f5f9;
  --bg-card-hover: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.88);
  
  --rule: #e2e8f0;
  --rule-light: #cbd5e1;
  
  --ink: #0f172a;
  --ink-soft: #475569;
  --ink-muted: #94a3b8;
  
  --mark-bg: rgba(56, 189, 248, 0.15);
  --mark-ink: #0284c7;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--ink);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 24px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  background-color: var(--bg);
  color: var(--ink);
  overflow-x: hidden;
  position: relative;
}

/* Subtle ambient radial glow */
body::before {
  content: "";
  position: fixed;
  top: -20%;
  left: 15%;
  width: 70vw;
  height: 60vh;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.035) 0%, rgba(129, 140, 248, 0.015) 50%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

::selection {
  background: rgba(56, 189, 248, 0.25);
  color: var(--ink);
}

/* Typography & Markers */
.font-mono {
  font-family: var(--font-mono);
}

.font-mono-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.marker-highlight {
  background-color: var(--mark-bg);
  color: var(--mark-ink);
  padding: 0.1em 0.35em;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section-y {
  padding-top: 88px;
  padding-bottom: 88px;
  border-bottom: 1px solid var(--rule);
  position: relative;
  z-index: 1;
}

@media (max-width: 768px) {
  .section-y {
    padding-top: 56px;
    padding-bottom: 56px;
  }
}

.section-header {
  margin-bottom: 40px;
}

.section-title {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.section-desc {
  margin-top: 10px;
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 720px;
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  height: var(--nav-height);
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.header.scrolled {
  border-bottom-color: var(--rule);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.brand-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.6);
}

.brand-subtitle {
  color: var(--ink-soft);
  font-weight: 400;
  font-size: 0.9rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--ink-soft);
  transition: color 0.2s ease;
  position: relative;
  padding: 4px 0;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 1.5px;
  background: var(--accent-primary);
  transition: width 0.25s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-divider {
  width: 1px;
  height: 16px;
  background: var(--rule);
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  background: var(--bg-surface);
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  border-color: var(--ink-soft);
  color: var(--ink);
}

.mobile-menu-btn {
  display: none;
  color: var(--ink);
  padding: 8px;
}

/* Hero Section */
.hero-section {
  padding-top: 48px;
  padding-bottom: 72px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 48px;
  align-items: center;
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.04em;
  color: var(--ink);
  margin-bottom: 20px;
}

.hero-title-accent {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-bio {
  font-size: 1.15rem;
  color: var(--ink-soft);
  line-height: 1.65;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 40px;
}

/* Portrait Card — Compact vladis.ai style */
.hero-portrait-wrapper {
  display: flex;
  justify-content: flex-end;
}

.hero-portrait-card {
  position: relative;
  width: 100%;
  max-width: 260px;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--rule);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  transition: var(--transition);
}

.hero-portrait-card:hover {
  border-color: var(--rule-light);
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

.hero-portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  text-decoration: none;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--ink);
  border: 1px solid var(--rule);
}

.btn-secondary:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--rule);
}

.btn-outline:hover {
  color: var(--ink);
  border-color: var(--rule-light);
  transform: translateY(-2px);
}

/* Stats Row */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px;
  border-top: 1px solid var(--rule);
  padding-top: 24px;
}

.stat-item dt {
  margin-bottom: 4px;
}

.stat-item dd {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--ink);
}

/* Experience Section */
.exp-timeline {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.exp-card {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 36px;
  padding: 32px;
  background: var(--bg-surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.exp-card:hover {
  border-color: var(--rule-light);
  background: var(--bg-card);
}

.exp-meta h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.exp-role-badge {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent-primary);
  margin-top: 6px;
  padding: 2px 8px;
  background: rgba(56, 189, 248, 0.08);
  border-radius: var(--radius-sm);
}

.exp-details-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.exp-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
}

.exp-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.exp-bullets li {
  position: relative;
  padding-left: 20px;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.6;
}

.exp-bullets li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.skill-category {
  padding: 24px;
  background: var(--bg-surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
}

.skill-category-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-pill {
  padding: 6px 12px;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--ink-soft);
  transition: var(--transition);
}

.skill-pill:hover {
  border-color: var(--accent-primary);
  color: var(--ink);
}

/* Trainings Grid */
.training-list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}

.training-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: var(--bg-surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--ink-soft);
  transition: var(--transition);
}

.training-item:hover {
  border-color: var(--accent-primary);
  color: var(--ink);
  background: var(--bg-card);
  transform: translateX(3px);
}

.training-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  flex-shrink: 0;
}

/* Connect / Contact Section */
.connect-card {
  padding: 48px;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-card) 100%);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}

.connect-card h2 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.connect-card p {
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto 32px;
}

.connect-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.email-copy-box {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--ink);
  transition: var(--transition);
}

.email-copy-box:hover {
  border-color: var(--accent-primary);
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card-hover);
  border: 1px solid var(--rule);
  border-radius: var(--radius-full);
  padding: 6px 12px;
  font-size: 0.75rem;
  color: var(--ink-soft);
  transition: var(--transition);
}

.copy-btn:hover {
  background: var(--accent-primary);
  color: #000;
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--accent-primary);
  color: var(--ink);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Footer */
.footer {
  padding-top: 40px;
  padding-bottom: 40px;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

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

/* Mobile responsive styles */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-portrait-wrapper {
    justify-content: flex-start;
  }

  .hero-portrait-card {
    max-width: 220px;
  }
  
  .hero-title {
    font-size: 2.6rem;
  }
  
  .exp-card {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--rule);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
  }
  
  .nav-links.open {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .connect-card {
    padding: 32px 20px;
  }
}