:root {
  --bg: #0b0f1a;
  --surface: #111827;
  --surface-2: #0f172a;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #60a5fa; /* blue-400 */
  --accent-strong: #3b82f6; /* blue-500 */
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(1200px 1200px at 20% -10%, rgba(59, 130, 246, 0.08), transparent 50%),
              radial-gradient(800px 800px at 100% 0%, rgba(99, 102, 241, 0.08), transparent 40%),
              var(--bg);
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
}

/* Utilities */
.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.section {
  padding: 80px 0;
}

.section__title {
  margin: 0 0 20px;
  font-size: clamp(24px, 3vw, 36px);
  letter-spacing: 0.3px;
}

.section__lead {
  margin: 0 0 10px;
  color: var(--muted);
}

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

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(120%) blur(8px);
  background: linear-gradient(180deg, rgba(17, 24, 39, 0.85), rgba(17, 24, 39, 0.65));
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.6px;
}

.nav__menu {
  display: flex;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__link {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  padding: 10px 12px;
  border-radius: 10px;
  transition: color 200ms ease, background 200ms ease;
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--text);
  background: rgba(99, 102, 241, 0.15);
}

.nav__toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 8px;
  border-radius: 10px;
  cursor: pointer;
}

.nav__bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px 0;
  background: var(--text);
  transition: transform 200ms ease, opacity 200ms ease;
}

/* Hero */
.hero {
  padding: 120px 0 80px;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 32px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.4px;
}

.hero__title {
  margin: 0 0 8px;
  font-size: clamp(32px, 6vw, 56px);
  line-height: 1.1;
}

.wave { margin-left: 6px; }

.hero__subtitle {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: clamp(14px, 2.2vw, 18px);
}

.hero__cta { display: flex; gap: 12px; flex-wrap: wrap; }

.hero__visual { position: relative; min-height: 220px; }

.orb {
  position: absolute;
  filter: blur(24px);
  border-radius: 999px;
  opacity: 0.7;
}

.orb--lg {
  width: 260px; height: 260px; right: 0; top: 10px;
  background: radial-gradient(circle at 30% 30%, rgba(96, 165, 250, 0.45), rgba(99, 102, 241, 0.2));
}

.orb--sm {
  width: 120px; height: 120px; left: 10%; bottom: 10px;
  background: radial-gradient(circle at 30% 30%, rgba(34, 197, 94, 0.35), rgba(59, 130, 246, 0.2));
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  color: #0b1220;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  box-shadow: 0 6px 18px rgba(59, 130, 246, 0.35);
}

.btn--primary:hover { box-shadow: 0 10px 24px rgba(59, 130, 246, 0.45); }

.btn--ghost {
  color: var(--text);
  background: rgba(99, 102, 241, 0.08);
  border-color: rgba(99, 102, 241, 0.25);
}

.btn--ghost:hover { background: rgba(99, 102, 241, 0.15); }

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.chip {
  padding: 8px 12px;
  background: rgba(2, 6, 23, 0.4);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  color: var(--muted);
}

/* Cards */
.cards {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

.card {
  grid-column: span 12;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  border-color: rgba(148, 163, 184, 0.28);
}

.card__body { padding: 20px 20px 8px; }
.card__title { margin: 0 0 6px; font-size: 20px; }
.card__desc { margin: 0 0 8px; color: var(--muted); }
.card__tech { margin: 0 0 14px; color: var(--accent); font-weight: 600; }
.card__actions { padding: 0 20px 18px; }

/* Skills */
.skills__grid .skill-card { grid-column: span 6; text-align: center; }
.skill-card .skill-card__inner { padding: 20px; }
.skill-card h3 { margin: 6px 0 6px; font-size: 18px; }
.skill-card p { margin: 0; color: var(--muted); font-size: 14px; }

/* Contact */
.contact__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
}

.list { list-style: none; padding: 0; margin: 0; }
.list a { color: var(--text); text-decoration: none; }
.list a:hover { color: var(--accent); }

.form {
  background: var(--surface);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.form__row { display: grid; gap: 8px; margin-bottom: 12px; }
.form__label { color: var(--muted); font-size: 14px; }
.form__input, .form__textarea {
  width: 100%;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 12px;
  padding: 12px 14px;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.form__input:focus, .form__textarea:focus {
  border-color: rgba(99, 102, 241, 0.45);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

/* Footer */
.footer {
  padding: 26px 0 40px;
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  color: var(--muted);
}

.footer__grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer__links { display: flex; gap: 16px; }
.footer__links a { color: var(--muted); text-decoration: none; }
.footer__links a:hover { color: var(--text); }

/* Responsive */
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav__toggle { display: inline-block; }
  .nav__menu {
    position: absolute;
    right: 4%;
    top: 64px;
    background: var(--surface);
    border: 1px solid rgba(148, 163, 184, 0.14);
    border-radius: 12px;
    padding: 10px;
    box-shadow: var(--shadow);
    flex-direction: column;
    width: min(260px, 92vw);
    display: none;
  }
  .nav__menu.is-open { display: flex; }
}

@media (min-width: 720px) {
  .skills__grid .skill-card { grid-column: span 4; }
}

@media (min-width: 1024px) {
  .skills__grid .skill-card { grid-column: span 3; }
}