/* ============================================================
   Jonathan Ie — Portfolio Design System
   ============================================================ */

/* ---------- Google Font (loaded via <link> in HTML) ---------- */
/* Inter + Outfit */

/* ---------- Custom Properties ---------- */
:root {
  --clr-bg-1: #060d1f;
  --clr-bg-2: #0c1a3a;
  --clr-bg-3: #122550;
  --clr-surface: rgba(255 255 255 / 0.05);
  --clr-surface-hover: rgba(255 255 255 / 0.10);
  --clr-accent: #3b8bff;
  --clr-accent-glow: rgba(59 139 255 / 0.35);
  --clr-accent-light: #72b4ff;
  --clr-text: #e8edf5;
  --clr-text-muted: #8fa4c4;
  --clr-border: rgba(255 255 255 / 0.08);
  --clr-success: #22c55e;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --shadow-card: 0 8px 32px rgba(0 0 0 / 0.35);
  --shadow-glow: 0 0 30px var(--clr-accent-glow);

  --transition-fast: 0.2s ease;
  --transition-mid: 0.35s ease;

  --max-width: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: linear-gradient(160deg, var(--clr-bg-1), var(--clr-bg-2) 40%, var(--clr-bg-3));
  color: var(--clr-text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- Utility ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Navigation ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6 13 31 / 0.80);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--clr-border);
}

.site-nav .container {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  transition: background var(--transition-fast), color var(--transition-fast);
  user-select: none;
}

.nav-link:hover,
.nav-link.active {
  background: var(--clr-surface-hover);
  color: var(--clr-accent-light);
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: 64px 24px 48px;
}

.hero__avatar-wrap {
  display: inline-block;
  position: relative;
  margin-bottom: 24px;
}

.hero__avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--clr-accent);
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-mid), box-shadow var(--transition-mid);
}

.hero__avatar:hover {
  transform: scale(1.06);
  box-shadow: 0 0 40px var(--clr-accent-glow);
}

.hero__title {
  font-family: 'Outfit', 'Inter', sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #fff, var(--clr-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--clr-text-muted);
  margin-bottom: 28px;
}

.hero__cta {
  display: inline-block;
  padding: 14px 36px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: var(--clr-accent);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: 0 4px 20px var(--clr-accent-glow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hero__cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--clr-accent-glow);
}

/* ---------- Sections ---------- */
.section {
  padding: 60px 0;
}

.section__heading {
  font-family: 'Outfit', 'Inter', sans-serif;
  font-size: clamp(1.6rem, 3.5vw, 2rem);
  font-weight: 700;
  margin-bottom: 32px;
  position: relative;
  display: inline-block;
  padding-bottom: 8px;
}

.section__heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 60px;
  height: 3px;
  background: var(--clr-accent);
  border-radius: 3px;
}

/* ---------- About ---------- */
.about__text {
  max-width: 680px;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--clr-text-muted);
}

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.skill-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.skill-card:hover {
  background: var(--clr-surface-hover);
  transform: translateY(-2px);
}

.skill-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.skill-card__name {
  font-weight: 600;
  font-size: 0.95rem;
}

.skill-card__pct {
  font-size: 0.8rem;
  color: var(--clr-accent-light);
  font-weight: 600;
}

.skill-bar {
  height: 6px;
  background: rgba(255 255 255 / 0.08);
  border-radius: 6px;
  overflow: hidden;
}

.skill-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent-light));
  border-radius: 6px;
  width: 0;
  transition: width 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.project-card {
  display: flex;
  flex-direction: column;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-mid), box-shadow var(--transition-mid), border-color var(--transition-mid);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
  border-color: rgba(59 139 255 / 0.25);
}

.project-card__img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: filter var(--transition-mid);
}

.project-card:hover .project-card__img {
  filter: brightness(0.8);
}

.project-card__body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.project-card__desc {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  line-height: 1.55;
  flex: 1;
}

/* ---------- Contact / Footer ---------- */
.site-footer {
  padding: 48px 0 36px;
  border-top: 1px solid var(--clr-border);
  text-align: center;
}

.site-footer__heading {
  font-family: 'Outfit', 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.site-footer__links {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  color: var(--clr-text-muted);
  transition: color var(--transition-fast);
}

.site-footer__link:hover {
  color: var(--clr-accent-light);
}

.site-footer__copy {
  margin-top: 24px;
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  opacity: 0.6;
}

/* ---------- Scroll animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .hero { padding: 40px 16px 32px; }
  .hero__avatar { width: 120px; height: 120px; }
  .section { padding: 40px 0; }
  .site-nav .container { gap: 4px; }
  .nav-link { padding: 6px 12px; font-size: 0.82rem; }
  .projects-grid { grid-template-columns: 1fr; }
}