/* ========================================
   Design Tokens
   ======================================== */
:root {
  --color-bg: #0a0a0b;
  --color-bg-alt: #111113;
  --color-surface: #18181b;
  --color-surface-hover: #1f1f23;
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-hover: rgba(255, 255, 255, 0.12);
  --color-text: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #52525b;
  --color-primary: #6d8ef7;
  --color-primary-glow: rgba(109, 142, 247, 0.15);
  --color-primary-hover: #8ba4ff;
  --color-accent: #64ffda;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.22, 1, 0.36, 1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

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

/* ========================================
   Utility
   ======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.container--narrow {
  max-width: 720px;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.4s var(--ease-out-expo);
}

.nav.scrolled {
  padding: 0.75rem 2rem;
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 500;
  transition: opacity 0.3s;
}

.nav__logo:hover {
  opacity: 0.8;
}

.nav__logo-bracket {
  color: var(--color-primary);
}

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

.nav__links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  transition: color 0.3s;
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-primary);
  transition: width 0.3s var(--ease-out-expo);
}

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

.nav__links a:hover::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s;
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    gap: 0;
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    padding: 5rem 2rem 2rem;
    transition: right 0.4s var(--ease-out-expo);
  }

  .nav__links.open {
    right: 0;
  }

  .nav__links a {
    padding: 1rem 0;
    font-size: 1rem;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
  }
}

/* ========================================
   Hero
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 6rem 2rem 4rem;
  text-align: center;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.4;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero__motion {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  z-index: 2;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  font: inherit;
  font-size: 0.75rem;
  cursor: pointer;
}

.hero__motion:hover,
.hero__motion:focus-visible {
  color: var(--color-text);
  border-color: var(--color-primary);
}

.hero__greeting {
  font-size: 1.125rem;
  color: var(--color-primary);
  font-weight: 400;
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
}

.hero__name {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  background: linear-gradient(
    135deg,
    var(--color-text) 0%,
    var(--color-text-secondary) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__title {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 300;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

.hero__highlight {
  color: var(--color-primary);
  -webkit-text-fill-color: var(--color-primary);
  font-weight: 500;
}

.hero__description {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 540px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: float 3s ease-in-out infinite;
}

.hero__scroll-mouse {
  width: 24px;
  height: 36px;
  border: 2px solid var(--color-text-muted);
  border-radius: 12px;
  position: relative;
}

.hero__scroll-dot {
  width: 3px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 50%;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollDot 2s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes scrollDot {
  0%, 100% { opacity: 1; top: 6px; }
  50% { opacity: 0.3; top: 18px; }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.3s var(--ease-out-expo);
  cursor: pointer;
  border: none;
}

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

.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(109, 142, 247, 0.25);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-hover);
}

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

.btn--large {
  padding: 1rem 2.5rem;
  font-size: 1rem;
}

/* ========================================
   Sections
   ======================================== */
.section {
  padding: 7rem 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 3.5rem;
  text-align: center;
  position: relative;
}

.section__title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  margin: 1rem auto 0;
}

/* ========================================
   About / Experience
   ======================================== */
.about__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: start;
}

.about__right {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  position: sticky;
  top: 5rem;
}

.exp-card {
  padding: 1.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all 0.3s var(--ease-out-expo);
}

.exp-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.exp-card__header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.35rem;
  flex-wrap: wrap;
}

.exp-card__header h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.exp-card__company {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
}

.exp-card__date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
}

.exp-card__bullets {
  list-style: none;
  padding: 0;
}

.exp-card__bullets li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

.exp-card__bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-size: 0.85rem;
}

.about__terminal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.3s;
}

.about__terminal:hover {
  border-color: var(--color-border-hover);
}

.about__terminal--stack .terminal__body {
  padding-bottom: 1rem;
}

.terminal__header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--color-border);
}

.terminal__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal__dot--red { background: #ff5f57; }
.terminal__dot--yellow { background: #febc2e; }
.terminal__dot--green { background: #28c840; }

.terminal__title {
  margin-left: 8px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.terminal__body {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.7;
}

.code__key {
  color: var(--color-primary);
}

.code__string {
  color: var(--color-accent);
}

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

@media (max-width: 1100px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about__right {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .about__right .about__terminal {
    flex: 1;
    min-width: 280px;
  }
}

/* ========================================
   Skills
   ======================================== */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
}

.skill-card {
  padding: 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all 0.3s var(--ease-out-expo);
}

.skill-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  background: var(--color-surface-hover);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

.skill-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.25rem;
  opacity: 0.9;
}

.skill-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.skill-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ========================================
   Projects
   ======================================== */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
}

.project-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s var(--ease-out-expo);
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-border-hover);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.project-card__image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.project-card__image img,
.project-card__image video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card__image--1 {
  background: linear-gradient(135deg, #1a1f3a 0%, #274690 100%);
}

.project-card__image--2 {
  background: linear-gradient(135deg, #1a2d1a 0%, #2d4a2d 100%);
}

.project-card__image--3 {
  background: linear-gradient(135deg, #2d1a2d 0%, #4a2d4a 100%);
}

.project-card__content {
  padding: 1.5rem;
}

.project-card__tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.project-card__tags span {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.625rem;
  border-radius: 999px;
  background: var(--color-primary-glow);
  color: var(--color-primary);
}

.project-card__title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.project-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.project-card__links {
  display: flex;
  gap: 1.25rem;
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  transition: color 0.3s;
}

.project-card__link svg {
  width: 16px;
  height: 16px;
}

.project-card__link:hover {
  color: var(--color-primary);
}

/* ========================================
   Contact
   ======================================== */
.contact__text {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

.contact__links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2.5rem;
}

.contact__social {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  transition: color 0.3s;
}

.contact__social:hover {
  color: var(--color-primary);
}

.contact__social svg {
  width: 20px;
  height: 20px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--color-border);
}

.footer p {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ========================================
   Animations
   ======================================== */
.animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out-expo),
              transform 0.6s var(--ease-out-expo);
}

.animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 600px) {
  .container {
    padding: 0 1.25rem;
  }

  .section {
    padding: 4rem 0;
  }

  .skills__grid,
  .projects__grid {
    grid-template-columns: 1fr;
  }

  .contact__links {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
}