/* ── Custom Properties ── */
:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-card-hover: #253349;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-heading: #f8fafc;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --tag-bg: rgba(99, 102, 241, 0.12);
  --tag-text: #a5b4fc;
  --border: rgba(148, 163, 184, 0.1);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1100px;
  --nav-height: 64px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.nav.scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: -0.02em;
}

.nav__logo span {
  color: var(--accent);
}

.nav__links {
  display: flex;
  gap: 32px;
}

.nav__links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  font-weight: 500;
}

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

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle svg {
  width: 24px;
  height: 24px;
  stroke: var(--text-primary);
}

/* ── Sections ── */
section {
  padding: 100px 24px;
}

.section__heading {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 48px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.section__heading::before {
  content: '';
  display: inline-block;
  width: 32px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

.section__subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: -36px;
  margin-bottom: 48px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ── Hero ── */
.hero {
  min-height: auto;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 40px;
}

.hero__content {
  max-width: 720px;
}

.hero__greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 20px;
  font-weight: 400;
}

.hero__name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.hero__name .domain-hack {
  color: var(--accent);
}

.hero__tagline {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-weight: 400;
}

.hero__tagline span {
  color: var(--text-secondary);
  margin: 0 8px;
}

.hero__description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero__socials {
  display: flex;
  gap: 20px;
}

.hero__socials a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--transition);
}

.hero__socials a:hover {
  color: var(--accent-hover);
  border-color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-2px);
}

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

/* ── Search ── */
.search {
  position: relative;
  max-width: 520px;
  margin-bottom: 40px;
}

.search__input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search__icon {
  position: absolute;
  left: 14px;
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
  pointer-events: none;
  flex-shrink: 0;
}

.search__input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search__input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

.search__input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search__dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  z-index: 900;
  max-height: 360px;
  overflow-y: auto;
  display: none;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.search__dropdown.open {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.search__item {
  display: block;
  padding: 12px 16px;
  cursor: pointer;
  transition: background var(--transition);
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
}

.search__item:last-child {
  border-bottom: none;
}

.search__item:hover,
.search__item.active {
  background: var(--bg-card-hover);
}

.search__item-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 2px;
}

.search__item-desc {
  font-size: 0.825rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.search__item-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.search__item-tag {
  font-family: var(--font-mono);
  font-size: 0.675rem;
  color: var(--tag-text);
  background: var(--tag-bg);
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.search__empty {
  padding: 16px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .search {
    max-width: 100%;
  }
}

/* ── About ── */
.about__content {
  max-width: 640px;
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about__content p + p {
  margin-top: 16px;
}

.about__generated {
  margin-top: 24px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  opacity: 0.7;
}

.about__generated a {
  color: var(--accent-hover);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ── Projects ── */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  position: relative;
}

.project-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(99, 102, 241, 0.25);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(99, 102, 241, 0.1);
}

.project-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.project-card__name {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-heading);
  transition: color var(--transition);
}

.project-card:hover .project-card__name {
  color: var(--accent-hover);
}

.project-card__name a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.project-card__name a:hover {
  color: var(--accent-hover);
}

.project-card__links {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.project-card__links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.project-card__links a:hover {
  color: var(--accent-hover);
  background: var(--accent-glow);
}

.project-card__links svg {
  width: 18px;
  height: 18px;
}

.project-card__description {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 20px;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-card__tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--tag-text);
  background: var(--tag-bg);
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ── Footer ── */
.footer {
  padding: 48px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer__socials {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 24px;
}

.footer__socials a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.footer__socials a:hover {
  color: var(--accent-hover);
  transform: translateY(-2px);
}

.footer__socials svg {
  width: 18px;
  height: 18px;
}

.footer__text {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer__text .heart {
  color: #ef4444;
}

/* ── Scroll Animations ── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  section {
    padding: 72px 20px;
  }

  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .nav__links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav__links a {
    padding: 12px 24px;
    font-size: 1rem;
    width: 100%;
    text-align: center;
  }

  .nav__toggle {
    display: block;
  }

  .hero {
    min-height: auto;
  }

  .hero__socials {
    gap: 14px;
  }

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

  .section__heading {
    font-size: 1.5rem;
    margin-bottom: 32px;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1025px) {
  .projects__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}