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

:root {
  --bg: #12141c;
  --bg-card: #181a24;
  --text: #eaeaea;
  --text-secondary: #a0a0b0;
  --text-dim: #555568;
  --accent: #6c63ff;
  --accent-soft: rgba(108, 99, 255, 0.12);
  --border: #22242e;
  --font-heading: 'Space Grotesk', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --max-width: 1100px;
  --spacing-xl: 7rem;
  --spacing-lg: 4rem;
  --spacing-md: 2rem;
  --spacing-sm: 1rem;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-weight: 400;
}

::selection {
  background: var(--accent-soft);
  color: var(--text);
}

/* ===== Skip Link ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  z-index: 100;
  text-decoration: none;
  border-radius: 4px;
}

.skip-link:focus {
  top: 1rem;
}

/* ===== Container ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ===== Header & Nav ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 1.25rem 0;
  background: rgba(18, 20, 28, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

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

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
}

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

.nav-lang {
  margin-left: 0.5rem;
  padding-left: 1.5rem;
  border-left: 1px solid var(--border);
}

.nav-lang a {
  font-family: var(--font-mono) !important;
  font-size: 0.75rem !important;
  font-weight: 500;
  letter-spacing: 0.1em !important;
  text-transform: uppercase;
}

/* ===== Hamburger ===== */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 60;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  transition: all 0.3s ease;
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  top: 7px;
}

.nav-toggle.active .hamburger {
  background: transparent;
}

.nav-toggle.active .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ===== Hero ===== */
.hero {
  padding-top: 10rem;
  padding-bottom: var(--spacing-xl);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--spacing-lg);
  align-items: start;
  margin-bottom: var(--spacing-xl);
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.03em;
}

.hero-right {
  padding-top: 2.5rem;
}

.hero-description {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

/* ===== Button ===== */
.btn-outline {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  padding: 0.75rem 1.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.btn-outline:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

/* ===== Stats ===== */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: -0.03em;
  color: var(--text);
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

/* ===== Sections ===== */
.section {
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--border);
}

/* ===== Split layout (label | content) ===== */
.split {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--spacing-lg);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  position: sticky;
  top: 6rem;
}

/* ===== About / Profile ===== */
.split-content .lead {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.split-content p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

/* ===== Expertise ===== */
.expertise-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.expertise-card {
  display: flex;
  gap: 1.5rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease;
}

.expertise-card:first-child {
  padding-top: 0;
}

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

.expertise-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  flex-shrink: 0;
  padding-top: 0.25rem;
}

.expertise-card h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

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

/* ===== Tech Stack ===== */
.tech-stack {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tags span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 0.4rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.tech-tags span:hover {
  border-color: var(--accent);
  color: var(--text);
}

/* ===== Experience / Timeline ===== */
.timeline {
  display: flex;
  flex-direction: column;
}

.timeline-item {
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--border);
}

.timeline-item:first-child {
  padding-top: 0;
}

.timeline-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.timeline-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1.25rem;
}

.timeline-meta h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.timeline-body {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.timeline-role h4 {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-dim);
  display: block;
  margin-bottom: 0.5rem;
}

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

/* ===== Contact ===== */
.section-contact {
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.contact-heading {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-sm);
}

.contact-text {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto var(--spacing-md);
  line-height: 1.7;
}

/* ===== Footer ===== */
.footer {
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--border);
}

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

.footer p {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
}

/* ===== Cookie Banner ===== */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transform: translateY(100%);
  opacity: 0;
  transition: transform 0.4s ease, opacity 0.4s ease;
  pointer-events: none;
}

.cookie-banner.visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.cookie-banner-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem var(--spacing-md);
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.cookie-banner-inner p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.cookie-banner-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

.cookie-btn {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.5rem 1.25rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.cookie-btn-accept {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.cookie-btn-accept:hover {
  background: #5a52e0;
  border-color: #5a52e0;
}

.cookie-btn-decline {
  background: transparent;
  color: var(--text-secondary);
}

.cookie-btn-decline:hover {
  border-color: var(--text-dim);
  color: var(--text);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 4rem;
    --spacing-lg: 2.5rem;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background: rgba(18, 20, 28, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2.5rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 55;
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text);
  }

  .hero {
    padding-top: 7rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .hero-right {
    padding-top: 0;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  .split {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  .section-label {
    position: static;
  }

  .timeline-meta {
    flex-direction: column;
    gap: 0.25rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .cookie-banner-inner {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
  }
}

/* ===== Animations ===== */
@media (prefers-reduced-motion: no-preference) {
  .hero-grid,
  .hero-stats,
  .split,
  .expertise-card,
  .timeline-item {
    opacity: 0;
    animation: slideUp 0.5s ease forwards;
  }

  .hero-grid { animation-delay: 0.1s; }
  .hero-stats { animation-delay: 0.25s; }

  @keyframes slideUp {
    from {
      opacity: 0;
      transform: translateY(16px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}