:root {
  --bg: #0b1220;               /* deep blue */
  --surface: #0f1a2e;          /* darker panel */
  --panel: #13233d;            /* cards */
  --text: #e6ecf3;             /* warm grey text */
  --muted: #9eb0c7;            /* muted */
  --primary: #1e3a8a;          /* bold tech blue */
  --primary-2: #2e4fb2;        /* lighter blue */
  --accent: #12b886;           /* accent green */
  --ring: rgba(18, 184, 134, 0.35);
  --border: color-mix(in lab, var(--text) 12%, transparent);
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.3);
}

html[data-theme="light"] {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --panel: #ffffff;
  --text: #0b1220;
  --muted: #4a5a70;
  --primary: #274690;
  --primary-2: #3e63d3;
  --accent: #12b886;
  --ring: rgba(62, 99, 211, 0.25);
  --border: color-mix(in lab, var(--text) 14%, transparent);
  --shadow: 0 12px 30px rgba(2, 6, 23, 0.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

.container { width: min(1100px, 92vw); margin-inline: auto; }
.section { padding: 80px 0; }

h1, h2, h3 { margin: 0 0 12px; letter-spacing: -0.01em; }
.subtitle { color: var(--muted); margin-top: -4px; }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: .12em; font-weight: 600; font-size: .85rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 1000; display: grid; grid-template-columns: 1fr auto auto; gap: 14px; align-items: center;
  padding: 14px 4vw; background: color-mix(in lab, var(--bg) 86%, transparent); backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: inline-flex; gap: 10px; align-items: center; color: var(--text); text-decoration: none; font-weight: 800; }
.brand-mark { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 8px; background: linear-gradient(135deg, var(--primary-2), var(--accent)); color: #07121f; font-weight: 900; }
.site-nav ul { display: flex; gap: 18px; list-style: none; padding: 0; margin: 0; }
.site-nav a { color: var(--muted); text-decoration: none; font-weight: 600; padding: 8px 10px; border-radius: 8px; }
.site-nav a:hover { color: var(--text); background: color-mix(in lab, var(--text) 8%, transparent); }
.site-nav a.active { color: var(--text); background: color-mix(in lab, var(--text) 12%, transparent); }
.site-nav .cta { color: white; background: linear-gradient(135deg, var(--primary-2), var(--accent)); }

.theme-toggle, .nav-toggle { margin-left: auto; background: transparent; color: var(--text); border: 1px solid var(--border); padding: 8px 10px; border-radius: 10px; cursor: pointer; }
.nav-toggle { display: none; width: 42px; height: 42px; align-items: center; justify-content: center; gap: 4px; }
.nav-toggle-bar { width: 18px; height: 2px; background: var(--text); display: block; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .site-nav { position: fixed; inset: 58px 14px auto; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow); padding: 12px; display: none; }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; gap: 6px; }
}

/* Hero Landing */
.hero-landing { position: relative; overflow: hidden; padding: 110px 0 80px; background: radial-gradient(800px 400px at 20% -10%, rgba(62,99,211,.18), transparent), radial-gradient(700px 500px at 90% 10%, rgba(18,184,134,.18), transparent); }
.hero-inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; }
.hero-cta { display: flex; gap: 12px; margin-top: 18px; }
.microcopy { color: var(--muted); margin-top: 10px; font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

@media (max-width: 980px) { .hero-inner { grid-template-columns: 1fr; } }

/* Subtle code background animation */
.code-bg::before {
  content: "{ } -> () => {} // stream | retry | backoff | saga | outbox | idempotency | tracing | metrics | tests ";
  position: absolute; inset: 0; pointer-events: none; white-space: nowrap; color: color-mix(in lab, var(--text) 10%, transparent);
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 14px; letter-spacing: .12em;
  transform: translateX(-50%);
  animation: marquee 24s linear infinite;
}
@keyframes marquee { from { transform: translateX(-50%); } to { transform: translateX(-10%); } }

/* Features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 16px; box-shadow: var(--shadow); }
@media (max-width: 980px) { .features { grid-template-columns: 1fr; } }

/* About layout */
.about-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; }
.about-side .card { margin-bottom: 16px; }
.profile-photo img { width: 100%; max-width: 320px; aspect-ratio: 1 / 1; object-fit: cover; border-radius: 16px; box-shadow: var(--shadow); display: block; margin: 0 auto; }
@media (max-width: 980px) { .about-layout { grid-template-columns: 1fr; } }

/* Cards */
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); padding: 16px; }
.note { background: linear-gradient(180deg, color-mix(in lab, var(--accent) 15%, transparent), transparent); }
.code-flair pre { margin: 0; color: color-mix(in lab, var(--text) 86%, transparent); }
.code-flair code { font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .95rem; }

/* Projects */
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 900px) { .projects-grid { grid-template-columns: 1fr; } }
.project .tags { display: flex; gap: 8px; list-style: none; padding: 0; margin: 10px 0 0; }
.tags li { font-size: .85rem; color: var(--muted); background: color-mix(in lab, var(--text) 8%, transparent); border-radius: 999px; padding: 4px 10px; }

/* Skills */
.grid-2 { display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; }
@media (max-width: 980px) { .grid-2 { grid-template-columns: 1fr; } }
.skill-items { list-style: none; padding: 0; margin: 10px 0 24px; display: grid; gap: 10px; }
.skill-items li { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; }
.skill-items li span { font-weight: 700; }
.skill-items li small { color: var(--muted); display: block; }
.bar { height: 8px; margin-top: 8px; background: color-mix(in lab, var(--text) 10%, transparent); border-radius: 999px; overflow: hidden; }
.bar::after { content: ""; display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--primary-2), var(--accent)); border-radius: inherit; transition: width 1200ms cubic-bezier(.2,.8,.2,1); }
.bar.filled::after { width: var(--pct, 0%); }

/* Counters & Badges */
.hero-aside { display: grid; gap: 12px; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.stat-num { font-size: 2rem; font-weight: 800; color: var(--accent); }
.stat-label { color: var(--muted); font-weight: 600; }

.counters { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.counter-card { text-align: center; background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.counter-num { font-size: 2.2rem; font-weight: 900; color: var(--accent); }
.counter-label { color: var(--muted); }
@media (max-width: 900px) { .counters { grid-template-columns: 1fr; } }

.badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.badge { background: color-mix(in lab, var(--text) 8%, transparent); color: var(--muted); border-radius: 999px; padding: 6px 12px; font-weight: 700; }

/* Blog */
.blog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 900px) { .blog-grid { grid-template-columns: 1fr; } }
.blog-card .read-more { color: var(--accent); text-decoration: none; font-weight: 700; }

/* Lists */
.list { padding-left: 18px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 26px 0; color: var(--muted); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 14px; border-radius: 12px; border: 1px solid transparent; text-decoration: none; font-weight: 800; cursor: pointer; }
.btn-primary { color: white; background: linear-gradient(135deg, var(--primary-2), var(--accent)); }
.btn-primary:hover { filter: brightness(1.05); }
.btn-outline { color: var(--text); background: transparent; border-color: var(--border); }
.btn-outline:hover { border-color: color-mix(in lab, var(--text) 22%, transparent); }

/* Forms */
.contact-form .form-row { display: grid; gap: 8px; }
label { font-weight: 700; }
input, textarea { color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; outline: none; transition: border-color 120ms ease, box-shadow 120ms ease; }
input:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--ring); }
.field-hint { min-height: 1.2em; font-size: .85rem; color: var(--muted); }
.form-actions { display: flex; align-items: center; gap: 12px; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(10px); transition: opacity 500ms ease, transform 500ms ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }