/* ---------- Design tokens ---------- */
:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --text: #1a1d26;
  --muted: #5c6270;
  --border: #e3e6ec;
  --accent: #3b6cf6;
  --accent-hover: #2f57d1;
  --github: #24292f;
  --linkedin: #0a66c2;
  --shadow: 0 6px 24px rgba(20, 24, 40, 0.08);
  --radius: 16px;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Space Grotesk", var(--font-body);
}

/* Follow the OS preference unless the user picked light explicitly */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1218;
    --surface: #171b24;
    --text: #eef0f5;
    --muted: #9aa1b0;
    --border: #262c38;
    --accent: #6a8dff;
    --accent-hover: #86a3ff;
    --github: #e6edf3;
    --linkedin: #4c9df0;
    --shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
  }
}

:root[data-theme="dark"] {
  --bg: #0f1218;
  --surface: #171b24;
  --text: #eef0f5;
  --muted: #9aa1b0;
  --border: #262c38;
  --accent: #6a8dff;
  --accent-hover: #86a3ff;
  --github: #e6edf3;
  --linkedin: #4c9df0;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}

/* ---------- Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0 0 0.5em;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
}

h3 {
  font-size: 1.15rem;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--accent);
  text-decoration: none;
}

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

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
}

.section {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
}

.section-intro {
  color: var(--muted);
  max-width: 60ch;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 16px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--text);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav a {
  color: var(--muted);
  font-weight: 500;
}

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

.theme-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  width: 38px;
  height: 38px;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 1rem;
}

.theme-toggle .icon-moon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: inline;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: none;
  }

  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: inline;
  }
}

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2rem;
  padding: 5rem 0 4rem;
}

.eyebrow {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
}

.tagline {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 45ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.3rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

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

.btn-ghost {
  border-color: var(--border);
  color: var(--text);
  background: var(--surface);
}

.avatar-placeholder {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 4.5rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  box-shadow: var(--shadow);
}

.hero-avatar img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  box-shadow: var(--shadow);
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
}

.about-grid p {
  font-size: 1.05rem;
}

.facts {
  list-style: none;
  padding: 0;
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.facts li {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 0.75rem;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.facts li:last-child {
  border-bottom: none;
}

.fact-label {
  color: var(--muted);
  font-weight: 500;
}

/* ---------- Interest cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.card-icon {
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--muted);
  margin: 0;
  font-size: 0.95rem;
}

/* ---------- Social widgets ---------- */
.widgets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.widget {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  padding: 1.4rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.widget:hover {
  transform: translateY(-4px);
  color: var(--text);
}

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

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

.widget-logo {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.widget-github .widget-logo {
  color: var(--github);
}

.widget-linkedin .widget-logo {
  color: var(--linkedin);
}

.widget-body {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.widget-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
}

.widget-sub {
  color: var(--muted);
  font-size: 0.9rem;
}

.widget-arrow {
  font-size: 1.4rem;
  color: var(--muted);
  transition: transform 0.15s ease;
}

.widget:hover .widget-arrow {
  transform: translateX(4px);
  color: var(--accent);
}

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 2rem 16px;
  border-top: 1px solid var(--border);
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 3rem;
  }

  .hero-avatar {
    order: -1;
    justify-self: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .tagline {
    margin-inline: auto;
  }

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

  .nav {
    gap: 0.9rem;
    font-size: 0.95rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn,
  .card,
  .widget,
  .widget-arrow {
    transition: none;
  }
}

/* ---------- Projects (GitHub) ---------- */
.projects-grid {
  min-height: 120px;
}

.projects-status {
  color: var(--muted);
  grid-column: 1 / -1;
  margin: 0;
}

.projects-status a {
  font-weight: 600;
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  color: var(--text);
}

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

.project-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.project-header svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--muted);
}

.project-card h3 {
  margin: 0;
  font-size: 1.05rem;
  word-break: break-word;
}

.project-desc {
  flex: 1;
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

.project-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--lang-color, var(--muted));
  display: inline-block;
}

.project-meta svg {
  width: 14px;
  height: 14px;
}