/* ============================================================
   HUGO BRITO — PORTFOLIO
   "Command center" design system: tokens, 8-pt spacing scale,
   elevation shadows, type scale, runtime theme switching.
   ============================================================ */

/* ---------- DESIGN TOKENS ---------- */
:root {
  /* Color — dark (default) */
  --bg: #0a0e12;
  --bg-elev-1: #10161d;
  --bg-elev-2: #161e27;
  --text: #e8edf2;
  --text-secondary: #b3bdc7;
  --muted: #7c8894;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.28);

  --accent: #35c4dc;            /* signal cyan */
  --accent-strong: #6ee7f5;
  --accent-ink: #04181d;
  --accent-dim: rgba(53, 196, 220, 0.12);

  --ok: #4ade80;
  --ok-dim: rgba(74, 222, 128, 0.12);
  --warn: #fbbf24;
  --warn-dim: rgba(251, 191, 36, 0.10);

  /* Elevation */
  --shadow-1: 0 1px 2px rgba(0,0,0,.35);
  --shadow-2: 0 8px 28px rgba(0,0,0,.45);
  --shadow-3: 0 16px 48px rgba(0,0,0,.55);

  /* Spacing — 8-pt scale */
  --s1: 8px; --s2: 16px; --s3: 24px; --s4: 32px;
  --s5: 40px; --s6: 48px; --s8: 64px; --s12: 96px;

  /* Radius & type */
  --radius: 14px;
  --radius-sm: 8px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  /* Hero grid texture */
  --grid-line: rgba(148, 163, 184, 0.055);
}

html[data-theme="light"] {
  --bg: #f4f6f8;
  --bg-elev-1: #ffffff;
  --bg-elev-2: #eef1f5;
  --text: #101820;
  --text-secondary: #3d4854;
  --muted: #64707c;
  --border: rgba(16, 24, 32, 0.10);
  --border-strong: rgba(16, 24, 32, 0.22);

  --accent: #0e7490;
  --accent-strong: #0891b2;
  --accent-ink: #ffffff;
  --accent-dim: rgba(14, 116, 144, 0.10);

  --ok: #15803d;
  --ok-dim: rgba(21, 128, 61, 0.10);
  --warn: #b45309;
  --warn-dim: rgba(180, 83, 9, 0.10);

  --shadow-1: 0 1px 2px rgba(2,6,23,.06);
  --shadow-2: 0 8px 28px rgba(2,6,23,.08);
  --shadow-3: 0 16px 48px rgba(2,6,23,.10);

  --grid-line: rgba(16, 24, 32, 0.045);
}

/* ---------- BASE ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: var(--accent); }
::selection { background: var(--accent); color: var(--accent-ink); }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; }
h2 { font-size: clamp(26px, 4vw, 34px); margin: 0 0 var(--s1); }

/* Eyebrow labels — mono, uppercase, command-center flavor */
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 var(--s1);
}
.eyebrow::before { content: "// "; opacity: .6; }

.section-intro { color: var(--text-secondary); max-width: 720px; margin: 0 0 var(--s4); }

/* ---------- HEADER / NAV ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text); font-weight: 800; letter-spacing: .02em;
}
.brand-logo { height: 30px; width: auto; border-radius: 6px; }
.brand-name { font-family: var(--mono); font-size: 14px; }
.brand-name span { color: var(--accent); }

.nav { display: flex; align-items: center; gap: var(--s2); }
.nav a {
  color: var(--text-secondary); text-decoration: none; font-size: 14px; font-weight: 600;
  padding: 6px 2px; border-bottom: 2px solid transparent; transition: color .15s, border-color .15s;
}
.nav a:hover { color: var(--text); border-bottom-color: var(--accent); }
.toggle {
  border: 1px solid var(--border); background: transparent; color: var(--text);
  border-radius: 999px; padding: 6px 10px; cursor: pointer; font-size: 14px;
}
.toggle:hover { border-color: var(--border-strong); }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  padding: var(--s12) 24px var(--s8);
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 70% 60% at 50% 0%,
    color-mix(in srgb, var(--accent) 9%, transparent), transparent 70%);
}
.hero-inner { position: relative; z-index: 1; max-width: 880px; margin: 0 auto; text-align: center; }

.avatar {
  width: 132px; height: 132px; border-radius: 50%; object-fit: cover;
  border: 3px solid var(--border-strong);
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  box-shadow: var(--shadow-2);
}
.hero h1 { margin: var(--s3) 0 var(--s1); font-size: clamp(34px, 6vw, 52px); }
.hero-role {
  font-family: var(--mono); font-size: clamp(13px, 2vw, 15px);
  color: var(--accent); letter-spacing: .06em; margin: 0 0 var(--s2);
}
.tagline { color: var(--text-secondary); max-width: 680px; margin: 0 auto; font-size: 17px; }
.quick-links { margin-top: var(--s4); }

/* Hero stats */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s2);
  max-width: 760px; margin: var(--s6) auto 0;
}
.stat {
  background: color-mix(in srgb, var(--bg-elev-1) 80%, transparent);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: var(--s2); text-align: center;
}
.stat b { display: block; font-size: 24px; letter-spacing: -0.02em; color: var(--text); }
.stat span { font-size: 12px; color: var(--muted); font-family: var(--mono); letter-spacing: .04em; }

/* ---------- BUTTONS ---------- */
.button {
  display: inline-block; padding: 12px 20px; margin: 6px;
  background: var(--accent); color: var(--accent-ink); border-radius: 10px;
  text-decoration: none; font-weight: 700; font-size: 15px;
  border: 1px solid transparent;
  transition: transform .15s, box-shadow .15s, background .15s;
}
.button:hover { transform: translateY(-1px); box-shadow: var(--shadow-2); background: var(--accent-strong); }
.button.secondary {
  background: transparent; color: var(--text); border: 1px solid var(--border-strong);
}
.button.secondary:hover { background: var(--accent-dim); border-color: var(--accent); box-shadow: none; }

/* ---------- SECTIONS ---------- */
.section { max-width: 1060px; margin: 0 auto; padding: var(--s8) 24px 0; }
.section:last-of-type { padding-bottom: var(--s8); }

/* ---------- CLEARANCE / NDA NOTICE ---------- */
.notice {
  display: flex; gap: var(--s2); align-items: flex-start;
  max-width: 1012px; margin: var(--s6) auto 0;
  background: var(--warn-dim);
  border: 1px solid color-mix(in srgb, var(--warn) 35%, transparent);
  border-left: 4px solid var(--warn);
  border-radius: var(--radius-sm);
  padding: var(--s2) var(--s3);
}
.notice-icon { font-size: 20px; line-height: 1.4; }
.notice p { margin: 0; color: var(--text-secondary); font-size: 15px; }
.notice b { color: var(--text); }

/* ---------- BADGES ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 11px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 999px;
}
.badge::before { content: "●"; font-size: 8px; }
.badge.gov { background: var(--warn-dim); color: var(--warn); border: 1px solid color-mix(in srgb, var(--warn) 40%, transparent); }
.badge.live { background: var(--ok-dim); color: var(--ok); border: 1px solid color-mix(in srgb, var(--ok) 40%, transparent); }
.badge.study { background: var(--accent-dim); color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); }

/* ---------- PROJECT CARDS ---------- */
.project-grid { display: grid; gap: var(--s3); }

.project-card {
  display: flex; flex-wrap: wrap; align-items: stretch;
  background: var(--bg-elev-1); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-1);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.project-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); border-color: var(--border-strong); }
.project-card > img { width: 100%; max-width: 360px; object-fit: cover; }
.project-info { padding: var(--s3); flex: 1; min-width: 280px; }
.project-info h3 { margin: var(--s1) 0 var(--s1); font-size: 22px; }
.project-info p { color: var(--text-secondary); margin: 0 0 var(--s2); }
.badges { display: flex; gap: var(--s1); flex-wrap: wrap; }
.meta {
  list-style: none; display: flex; flex-wrap: wrap; gap: 8px 20px;
  padding: 0; margin: 0 0 var(--s2);
  color: var(--muted); font-size: 13px; font-family: var(--mono);
}

/* Text-only "cover" for NDA projects — abstract terminal art */
.project-cover {
  flex: 0 0 360px; min-height: 220px; display: flex; align-items: center; justify-content: center;
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    var(--bg-elev-2);
  background-size: 28px 28px, 28px 28px, auto;
  border-right: 1px solid var(--border);
}
.project-cover code {
  font-family: var(--mono); font-size: 13px; color: var(--muted);
  line-height: 2; white-space: pre; text-align: left;
}
.project-cover code b { color: var(--accent); font-weight: 600; }

/* ---------- TECH CHIPS ---------- */
.chips { display: flex; gap: 8px; flex-wrap: wrap; list-style: none; padding: 0; margin: var(--s2) 0 0; }
.chips li {
  border: 1px solid var(--border); padding: 4px 10px; border-radius: 999px;
  color: var(--text-secondary); font-size: 12.5px; font-family: var(--mono); background: var(--bg-elev-2);
}

/* ---------- SKILLS GRID ---------- */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--s2); }
.skill-card {
  background: var(--bg-elev-1); border: 1px solid var(--border);
  border-radius: var(--radius); padding: var(--s3); box-shadow: var(--shadow-1);
}
.skill-card h3 { margin: 0 0 var(--s1); font-size: 15px; font-family: var(--mono); letter-spacing: .04em; color: var(--accent); }
.skill-card p { margin: 0; color: var(--text-secondary); font-size: 14.5px; }

/* ---------- EXPERIENCE TIMELINE ---------- */
.timeline { position: relative; padding-left: var(--s4); }
.timeline::before {
  content: ""; position: absolute; left: 9px; top: 6px; bottom: 6px;
  width: 2px; background: var(--border-strong);
}
.tl-item { position: relative; padding: 0 0 var(--s4); }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: calc(-1 * var(--s4) + 3px); top: 7px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--accent);
}
.tl-date { font-family: var(--mono); font-size: 12.5px; color: var(--muted); letter-spacing: .05em; }
.tl-item h3 { margin: 2px 0 2px; font-size: 18px; }
.tl-item h3 span { color: var(--muted); font-weight: 500; }
.tl-item p { margin: 4px 0 0; color: var(--text-secondary); font-size: 15px; max-width: 760px; }

/* ---------- CREDENTIALS ---------- */
.creds { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--s2); }
.cred {
  display: flex; align-items: center; gap: var(--s2);
  background: var(--bg-elev-1); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: var(--s2);
}
.cred-icon { font-size: 22px; }
.cred b { display: block; font-size: 14.5px; }
.cred span { font-size: 13px; color: var(--muted); }

/* ---------- CONTACT ---------- */
.contact-card {
  background: var(--bg-elev-1); border: 1px solid var(--border);
  border-radius: var(--radius); padding: var(--s5); text-align: center; box-shadow: var(--shadow-1);
}
.contact-card p { color: var(--text-secondary); max-width: 560px; margin: 0 auto var(--s3); }

/* ---------- CASE STUDY PAGES ---------- */
.case { padding: var(--s3) 24px; }
.case-article { max-width: 880px; margin: 0 auto; }
.case-hero { text-align: center; margin: var(--s4) 0 var(--s2); }
.case-hero h1 { font-size: clamp(30px, 5vw, 42px); margin: var(--s2) 0 var(--s1); }
.case-subtitle { color: var(--text-secondary); max-width: 640px; margin: 0 auto; }
.case-hero-img {
  width: 100%; border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: var(--shadow-2); margin-top: var(--s3);
}
.case-hero .chips { justify-content: center; }

.case-toc { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin: var(--s3) 0 var(--s4); }
.case-toc a {
  text-decoration: none; color: var(--text-secondary); font-size: 13.5px; font-family: var(--mono);
  border: 1px solid var(--border); padding: 6px 12px; border-radius: 999px;
  transition: border-color .15s, color .15s;
}
.case-toc a:hover { border-color: var(--accent); color: var(--accent); }

.case-section {
  background: var(--bg-elev-1); border: 1px solid var(--border);
  border-radius: var(--radius); padding: var(--s3) var(--s4); margin: var(--s2) 0;
  box-shadow: var(--shadow-1);
}
.case-section h2 { margin-top: 0; font-size: 24px; }
.case-section h3 { color: var(--accent); font-size: 15px; font-family: var(--mono); letter-spacing: .04em; }
.case-section li { margin-bottom: 6px; color: var(--text-secondary); }
.case-section p { color: var(--text-secondary); }
.case-section strong { color: var(--text); }

.case-nav { display: flex; justify-content: center; margin: var(--s4) 0; }

/* NDA banner on case pages */
.nda-banner {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--warn-dim);
  border: 1px solid color-mix(in srgb, var(--warn) 35%, transparent);
  border-left: 4px solid var(--warn);
  border-radius: var(--radius-sm);
  padding: 12px 16px; margin: var(--s3) 0;
  text-align: left;
}
.nda-banner p { margin: 0; font-size: 14px; color: var(--text-secondary); }
.nda-banner b { color: var(--text); }

/* ---------- FOOTER ---------- */
.footer {
  text-align: center; color: var(--muted); font-family: var(--mono);
  font-size: 13px; padding: var(--s5) 24px; border-top: 1px solid var(--border);
  margin-top: var(--s8);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 780px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .project-card { flex-direction: column; }
  .project-card > img, .project-cover { max-width: none; flex: none; width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
  .nav a { margin-right: 0; font-size: 13px; }
  .nav { gap: 12px; }
}

/* ---------- REDUCED MOTION ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}