/* =====================================================
   SHAMAR BRYANT — CYBERSECURITY PORTFOLIO
   styles.css
   ===================================================== */

/* ─── Variables ─────────────────────────────────────── */
:root {
  --bg-main:      #0B0F14;
  --bg-section:   #111827;
  --bg-card:      #161F2E;
  --text-primary: #F8FAFC;
  --text-secondary:#94A3B8;
  --accent:       #38BDF8;
  --accent-green: #22C55E;
  --accent-amber: #F59E0B;
  --border:       rgba(56,189,248,0.15);
  --border-solid: rgba(255,255,255,0.06);
  --shadow-md:    0 4px 20px rgba(0,0,0,0.4);
  --shadow-glow:  0 4px 24px rgba(56,189,248,0.12);
  --radius:       10px;
  --radius-lg:    16px;
  --nav-h:        68px;
  --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;
  --max-width:    1200px;
  --transition:   0.2s ease;
}

/* ─── Reset ─────────────────────────────────────────── */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
img,svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
ul,ol { list-style: none; }

/* ─── Base ──────────────────────────────────────────── */
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ─── Typography ────────────────────────────────────── */
h1,h2,h3,h4,h5,h6 { line-height: 1.2; font-weight: 700; color: var(--text-primary); }
h1 { font-size: clamp(2rem,5vw,3.5rem); }
h2 { font-size: clamp(1.5rem,3vw,2.25rem); }
h3 { font-size: clamp(1.1rem,2vw,1.4rem); }
h4 { font-size: 1.1rem; }
p  { color: var(--text-secondary); line-height: 1.7; }
code,pre { font-family: var(--font-mono); }

/* ─── Layout ────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section        { padding: 5rem 0; }
.section-alt    { background-color: var(--bg-section); }
.section-label  {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.section-title        { margin-bottom: 0.75rem; }
.section-title span   { color: var(--accent); }
.section-desc {
  max-width: 580px;
  color: var(--text-secondary);
  margin-bottom: 2.75rem;
  font-size: 0.95rem;
}

/* ─── Navigation ────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(11,15,20,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-solid);
  transition: box-shadow var(--transition);
}
.nav.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.5); }
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  letter-spacing: -0.01em;
}
.logo-mark {
  width: 34px; height: 34px;
  background: url('../misc/S-logo.png') center/cover no-repeat;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
  flex-shrink: 0;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
  padding-bottom: 2px;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--transition);
}
.nav-link:hover,
.nav-link.active   { color: var(--text-primary); }
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 34px; height: 34px;
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

main { padding-top: var(--nav-h); }

/* ─── Buttons ───────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 8px;
  padding: 0.6rem 1.3rem;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary  { background: var(--accent); color: var(--bg-main); }
.btn-primary:hover {
  background: #7dd3fc;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(56,189,248,0.3);
}
.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-solid);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-solid);
}
.btn-outline:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
  transform: translateY(-1px);
}
.btn-sm  { font-size: 0.78rem; padding: 0.4rem 0.9rem; }
.btn-lg  { font-size: 0.95rem; padding: 0.7rem 1.6rem; }

/* ─── Tags / Badges ─────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  white-space: nowrap;
}
.tag-blue   { color: var(--accent);         background: rgba(56,189,248,0.1);  border: 1px solid rgba(56,189,248,0.2); }
.tag-green  { color: var(--accent-green);   background: rgba(34,197,94,0.1);   border: 1px solid rgba(34,197,94,0.2); }
.tag-amber  { color: var(--accent-amber);   background: rgba(245,158,11,0.1);  border: 1px solid rgba(245,158,11,0.2); }
.tag-gray   { color: var(--text-secondary); background: rgba(148,163,184,0.07);border: 1px solid var(--border-solid); }
.tag-purple { color: #a78bfa;               background: rgba(167,139,250,0.1); border: 1px solid rgba(167,139,250,0.2); }
.tags-row   { display: flex; flex-wrap: wrap; gap: 0.4rem; }

/* ─── Cards ─────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all 0.3s ease;
}
.card:hover {
  border-color: var(--border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.card-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 1rem;
  flex-shrink: 0;
}
.card-icon.blue   { background: rgba(56,189,248,0.1);  border: 1px solid rgba(56,189,248,0.2);  color: var(--accent); }
.card-icon.green  { background: rgba(34,197,94,0.1);   border: 1px solid rgba(34,197,94,0.2);   color: var(--accent-green); }
.card-icon.amber  { background: rgba(245,158,11,0.1);  border: 1px solid rgba(245,158,11,0.2);  color: var(--accent-amber); }
.card-icon.purple { background: rgba(167,139,250,0.1); border: 1px solid rgba(167,139,250,0.2); color: #a78bfa; }
.card h3   { margin-bottom: 0.5rem; font-size: 1.05rem; }
.card p    { font-size: 0.875rem; line-height: 1.65; }

/* ─── Hero ──────────────────────────────────────────── */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -300px; right: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(56,189,248,0.05) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4rem;
  padding: 4rem 0;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent-green);
  background: rgba(34,197,94,0.08);
  border: 1px solid rgba(34,197,94,0.22);
  border-radius: 100px;
  padding: 0.3rem 0.85rem;
  margin-bottom: 1.25rem;
}
.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--accent-green);
  border-radius: 50%;
  flex-shrink: 0;
}
.hero-name {
  font-size: clamp(2.4rem,5.5vw,3.75rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  line-height: 1.08;
  margin-bottom: 0.5rem;
}
.hero-title {
  font-size: clamp(0.95rem,1.8vw,1.1rem);
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1.25rem;
  letter-spacing: 0.01em;
}
.hero-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.8;
  margin-bottom: 2rem;
}
.hero-cta {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.hero-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}
.hero-stack-item {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: 5px;
  padding: 0.22rem 0.6rem;
  font-family: var(--font-mono);
}
.hero-badges {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.hero-image-wrap {
  position: relative;
  flex-shrink: 0;
}
.hero-image-wrap::before {
  content: '';
  position: absolute;
  inset: -10px;
  border: 1px solid var(--border);
  border-radius: 22px;
  z-index: 0;
  pointer-events: none;
}
.hero-img {
  width: 270px;
  height: 310px;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

/* ─── Focus Area Cards ──────────────────────────────── */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 1.5rem;
}
.focus-card-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.875rem;
}
.focus-card-tools span {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-solid);
  border-radius: 4px;
  padding: 0.15rem 0.45rem;
}

/* ─── Project Cards ─────────────────────────────────── */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}
.project-card:hover {
  border-color: var(--border);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}
.project-card.featured { border-color: rgba(56,189,248,0.22); }
.project-card-visual {
  width: 100%;
  height: 190px;
  background: var(--bg-section);
  border-bottom: 1px solid var(--border-solid);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.project-card-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.project-card-body {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}
.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}
.featured-badge {
  font-size: 0.62rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(56,189,248,0.08);
  border: 1px solid rgba(56,189,248,0.2);
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  white-space: nowrap;
  flex-shrink: 0;
}
.project-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}
.project-card-summary {
  font-size: 0.855rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
}
.project-card-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.tool-tag {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-solid);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  font-family: var(--font-mono);
}
.project-card-footer {
  padding: 0.875rem 1.4rem;
  border-top: 1px solid var(--border-solid);
}

/* ─── Mini Arch Diagram (project card) ──────────────── */
.mini-arch {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-secondary);
  text-align: center;
  line-height: 2;
}
.mini-arch .mn { color: var(--accent); font-weight: 600; }
.mini-arch .ma { color: var(--text-secondary); opacity: 0.45; }

/* ─── Architecture Diagram (full page) ─────────────── */
.arch-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: 1.5rem;
  background: var(--bg-section);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  margin: 1.5rem 0;
}
.arch-node {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: 8px;
  padding: 0.55rem 1.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  min-width: 200px;
  font-family: var(--font-mono);
}
.arch-node small  { display: block; font-weight: 400; color: var(--text-secondary); font-size: 0.7rem; }
.arch-node.hl     { border-color: var(--accent); color: var(--accent); background: rgba(56,189,248,0.07); }
.arch-node.hl-g   { border-color: var(--accent-green); color: var(--accent-green); background: rgba(34,197,94,0.07); }
.arch-arrow       { font-size: 1rem; color: var(--accent); opacity: 0.6; padding: 0.1rem 0; line-height: 1.4; }

/* ─── Projects Page ─────────────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.75rem;
}
.filter-btn {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 0.95rem;
  border-radius: 6px;
  border: 1px solid var(--border-solid);
  color: var(--text-secondary);
  background: var(--bg-card);
  transition: all var(--transition);
}
.filter-btn:hover { color: var(--text-primary); border-color: var(--accent); }
.filter-btn.active {
  color: var(--bg-main);
  background: var(--accent);
  border-color: var(--accent);
}
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1.5rem;
}
.projects-featured-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1.5rem;
}

/* ─── Page Header (inner pages) ─────────────────────── */
.page-header {
  background: var(--bg-section);
  border-bottom: 1px solid var(--border-solid);
  padding: 3rem 0 2.5rem;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}
.breadcrumb a  { transition: color var(--transition); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { opacity: 0.4; }
.page-title {
  font-size: clamp(1.75rem,4vw,2.4rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.875rem;
  line-height: 1.15;
}
.page-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.7;
}

/* ─── Project Snapshot Table ────────────────────────── */
.project-snapshot {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 2rem 0;
}
.project-snapshot table { width: 100%; border-collapse: collapse; }
.project-snapshot td {
  padding: 0.7rem 1.25rem;
  border-bottom: 1px solid var(--border-solid);
  font-size: 0.875rem;
  vertical-align: top;
}
.project-snapshot tr:last-child td { border-bottom: none; }
.project-snapshot td:first-child {
  width: 140px;
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

/* ─── Case Study Content ────────────────────────────── */
.case-study { padding: 4rem 0; }
.case-study-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 4rem;
  align-items: start;
}
.case-study-toc {
  position: sticky;
  top: calc(var(--nav-h) + 2rem);
}
.toc-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}
.toc-links { display: flex; flex-direction: column; gap: 0.15rem; }
.toc-link {
  font-size: 0.78rem;
  color: var(--text-secondary);
  padding: 0.3rem 0.6rem;
  border-left: 2px solid var(--border-solid);
  transition: all var(--transition);
}
.toc-link:hover { color: var(--accent); border-left-color: var(--accent); }

/* Case Study Sections */
.cs-section { margin-bottom: 3.5rem; }
.cs-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border-solid);
  color: var(--text-primary);
}
.cs-section p {
  margin-bottom: 0.875rem;
  font-size: 0.925rem;
  line-height: 1.75;
}
.cs-section ul,
.cs-section ol {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}
.cs-section ul li::before {
  content: '→';
  color: var(--accent);
  position: absolute;
  left: -1.5rem;
  top: 0.1em;
}
.cs-section ol { counter-reset: cs-counter; }
.cs-section ol li::before {
  content: counter(cs-counter) '.';
  counter-increment: cs-counter;
  color: var(--accent);
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  position: absolute;
  left: -1.5rem;
  top: 0.1em;
}
.cs-section li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  position: relative;
}

/* Code Blocks */
.code-block {
  background: #0d1117;
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 1.25rem 0;
  font-family: var(--font-mono);
}
.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border-solid);
  font-size: 0.72rem;
  color: var(--text-secondary);
}
.code-content {
  padding: 1.25rem;
  overflow-x: auto;
  font-size: 0.82rem;
  color: #e2e8f0;
  line-height: 1.75;
  white-space: pre;
}
.cmd  { color: var(--accent); }
.out  { color: var(--accent-green); }
.cmt  { color: #475569; }
.hl   { color: var(--accent-amber); }

/* Inline code in prose */
.cs-section p code,
.cs-section li code,
.callout code,
.challenge-block p code {
  background: rgba(56,189,248,0.07);
  border: 1px solid rgba(56,189,248,0.12);
  border-radius: 3px;
  padding: 0.08em 0.38em;
  font-size: 0.875em;
  font-family: var(--font-mono);
  color: var(--accent);
  word-break: break-word;
}

/* Challenge / Fix */
.challenge-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0;
}
.challenge-block {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  padding: 1.1rem;
}
.challenge-block.prob { border-left: 3px solid var(--accent-amber); }
.challenge-block.sol  { border-left: 3px solid var(--accent-green); }
.ch-label {
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}
.ch-label.prob { color: var(--accent-amber); }
.ch-label.sol  { color: var(--accent-green); }
.challenge-block p { font-size: 0.855rem; margin: 0; }

/* Metrics */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1rem;
  margin: 1.5rem 0;
}
.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}
.metric-value {
  font-size: 2.2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent);
  display: block;
  line-height: 1;
  margin-bottom: 0.4rem;
}
.metric-value.green { color: var(--accent-green); }
.metric-value.amber { color: var(--accent-amber); }
.metric-label { font-size: 0.78rem; color: var(--text-secondary); }

/* Screenshots */
.screenshot-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.screenshot-item {
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  overflow: hidden;
}
.screenshot-item img { width: 100%; height: auto; display: block; }
.screenshot-caption {
  padding: 0.5rem 0.875rem;
  font-size: 0.72rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  border-top: 1px solid var(--border-solid);
}

/* Callout */
.callout {
  background: rgba(56,189,248,0.05);
  border: 1px solid rgba(56,189,248,0.18);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.callout.warn {
  background: rgba(245,158,11,0.05);
  border-color: rgba(245,158,11,0.18);
  border-left-color: var(--accent-amber);
}
.callout strong { color: var(--text-primary); }

/* Skills Used List */
.skills-used {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0;
}
.skill-chip {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-solid);
  border-radius: 6px;
  padding: 0.3rem 0.7rem;
  transition: all var(--transition);
}
.skill-chip:hover {
  color: var(--accent);
  border-color: rgba(56,189,248,0.3);
  background: rgba(56,189,248,0.05);
}

/* ─── Skills Page ───────────────────────────────────── */
.skills-full-grid {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 1.5rem;
}
.skill-full-card {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.skill-full-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.skill-tag-list { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* Skills snapshot (homepage) */
.skills-snapshot-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1.25rem;
}
.skills-building-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1.5rem;
}
.resume-skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 2rem;
}
.skill-snapshot-card {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.skill-snapshot-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.skill-snapshot-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* ─── Certifications ────────────────────────────────── */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1.5rem;
}
.cert-grid-2 {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 1.5rem;
  margin-bottom: 4rem;
}
.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all 0.3s ease;
}
.cert-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.cert-card.earned     { border-color: rgba(34,197,94,0.22); }
.cert-card.in-prog    { border-color: rgba(245,158,11,0.18); opacity: 0.88; }
.cert-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}
.cert-icon.blue  { background: rgba(56,189,248,0.1);  border: 2px solid rgba(56,189,248,0.25);  color: var(--accent); }
.cert-icon.green { background: rgba(34,197,94,0.1);   border: 2px solid rgba(34,197,94,0.25);   color: var(--accent-green); }
.cert-icon.amber { background: rgba(245,158,11,0.1);  border: 2px solid rgba(245,158,11,0.25);  color: var(--accent-amber); }
.cert-status {
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.22rem 0.65rem;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 0.6rem;
}
.cert-status.earned { color: var(--accent-green); background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.22); }
.cert-status.in-prog { color: var(--accent-amber); background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.22); }
.cert-name   { font-size: 1rem;   font-weight: 700; color: var(--text-primary); margin-bottom: 0.3rem; }
.cert-issuer { font-size: 0.8rem; color: var(--text-secondary); }
.cert-year   { font-size: 0.72rem; color: var(--text-secondary); margin-top: 0.3rem; font-family: var(--font-mono); }

/* ─── About Page ────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 4rem;
  align-items: start;
}
.about-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 2rem);
}
.about-photo {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  width: 100%;
  margin-bottom: 1.5rem;
}
.about-info-block {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.about-info-block-title {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.about-info-list { display: flex; flex-direction: column; gap: 0.5rem; }
.about-info-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.about-info-item i { color: var(--accent); width: 16px; text-align: center; flex-shrink: 0; }
.about-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}
.about-content p {
  font-size: 0.94rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
}
.about-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
  color: var(--text-primary);
}
.about-focus-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.about-focus-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: 8px;
}
.about-focus-item i {
  color: var(--accent-green);
  width: 16px;
  text-align: center;
  flex-shrink: 0;
}
.personal-grid {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 1rem;
  margin-top: 1rem;
}
.personal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}
.personal-card-icon { font-size: 1.25rem; flex-shrink: 0; }
.personal-card-title { font-size: 0.875rem; font-weight: 700; color: var(--text-primary); margin-bottom: 0.2rem; }
.personal-card-desc  { font-size: 0.78rem; color: var(--text-secondary); }

/* ─── Resume Page ───────────────────────────────────── */
.resume-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  align-items: start;
}
.resume-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 2rem);
}
.resume-download-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  text-align: center;
  margin-bottom: 1.5rem;
}
.resume-download-card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}
.resume-download-card p {
  font-size: 0.8rem;
  margin-bottom: 1.25rem;
}
.resume-section-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-solid);
}
.resume-entry {
  margin-bottom: 1.5rem;
  padding-left: 1rem;
  border-left: 2px solid var(--border-solid);
  transition: border-color var(--transition);
}
.resume-entry:hover { border-left-color: var(--accent); }
.resume-entry-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.2rem;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.resume-entry-title { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); }
.resume-entry-date  { font-size: 0.72rem; font-family: var(--font-mono); color: var(--text-secondary); }
.resume-entry-org   { font-size: 0.85rem; color: var(--accent); margin-bottom: 0.5rem; }
.resume-bullets { list-style: none; display: flex; flex-direction: column; gap: 0.3rem; }
.resume-bullets li {
  font-size: 0.855rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}
.resume-bullets li::before { content: '→'; color: var(--accent); flex-shrink: 0; margin-top: 1px; }

/* ─── Contact Page ──────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.contact-icon {
  width: 40px; height: 40px;
  background: rgba(56,189,248,0.08);
  border: 1px solid rgba(56,189,248,0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
  font-size: 0.875rem;
}
.contact-info-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 0.2rem;
}
.contact-info-value { font-size: 0.9rem; color: var(--text-primary); }
.contact-info-value a { color: var(--accent); }
.contact-info-value a:hover { text-decoration: underline; }
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
}
.form-input,
.form-textarea {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius);
  padding: 0.7rem 1rem;
  font-size: 0.9rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56,189,248,0.1);
}
.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-secondary); opacity: 0.45; }
.form-textarea { min-height: 140px; resize: vertical; }

/* ─── Footer ────────────────────────────────────────── */
.footer {
  background: var(--bg-section);
  border-top: 1px solid var(--border-solid);
  padding: 3rem 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}
.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.footer-tagline { font-size: 0.855rem; color: var(--text-secondary); line-height: 1.65; }
.footer-col-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}
.footer-links { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-link { font-size: 0.855rem; color: var(--text-secondary); transition: color var(--transition); }
.footer-link:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-solid);
  font-size: 0.78rem;
  color: var(--text-secondary);
}
.footer-social { display: flex; gap: 0.75rem; }
.social-link {
  width: 34px; height: 34px;
  background: var(--bg-card);
  border: 1px solid var(--border-solid);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
  font-size: 0.875rem;
}
.social-link:hover { color: var(--accent); border-color: rgba(56,189,248,0.3); }

/* ─── Utilities ─────────────────────────────────────── */
.text-accent  { color: var(--accent) !important; }
.text-green   { color: var(--accent-green) !important; }
.text-amber   { color: var(--accent-amber) !important; }
.text-muted   { color: var(--text-secondary) !important; }
.mt-1  { margin-top: 0.5rem; }
.mt-2  { margin-top: 1rem; }
.mt-3  { margin-top: 1.5rem; }
.mt-4  { margin-top: 2rem; }
.mb-1  { margin-bottom: 0.5rem; }
.mb-2  { margin-bottom: 1rem; }
.mb-3  { margin-bottom: 1.5rem; }
.mb-4  { margin-bottom: 2rem; }
.fw-700 { font-weight: 700; }
.mono   { font-family: var(--font-mono); }

/* ─── Animations ────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.4s ease forwards; }

/* ─── Responsive ────────────────────────────────────── */
@media (max-width: 1024px) {
  .case-study-grid       { grid-template-columns: 1fr; }
  .case-study-toc        { display: none; }
  .about-grid            { grid-template-columns: 1fr; }
  .about-sidebar         { position: static; }
  .about-photo           { max-width: 250px; }
  .resume-layout         { grid-template-columns: 1fr; }
  .resume-sidebar        { position: static; }
  .cert-grid             { grid-template-columns: repeat(2,1fr); }
  .footer-grid           { grid-template-columns: repeat(2,1fr); }
  .projects-grid         { grid-template-columns: repeat(2,1fr); }
  .projects-featured-grid{ grid-template-columns: repeat(2,1fr); }
  .skills-snapshot-grid  { grid-template-columns: repeat(2,1fr); }
  .skills-building-grid  { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 768px) {
  .about-preview-grid { grid-template-columns: 1fr !important; gap: 2rem !important; }
  :root { --nav-h: 60px; }
  .nav-menu {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(11,15,20,0.98);
    backdrop-filter: blur(14px);
    flex-direction: column;
    gap: 0;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-solid);
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    z-index: 998;
  }
  .nav-menu.open  { transform: translateY(0); opacity: 1; pointer-events: all; }
  .nav-link       { padding: 0.75rem 1.5rem; font-size: 0.95rem; }
  .nav-link::after { display: none; }
  .nav-toggle     { display: flex; }
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 3rem 0;
    gap: 2.5rem;
  }
  .hero-image-wrap    { display: flex; justify-content: center; order: -1; }
  .hero-img           { width: 190px; height: 215px; }
  .hero-tagline       { margin-left: auto; margin-right: auto; }
  .hero-cta           { justify-content: center; }
  .hero-stack         { justify-content: center; }
  .hero-badges        { justify-content: center; }
  .hero-title         { overflow-wrap: break-word; }
  .focus-grid         { grid-template-columns: 1fr; }
  .projects-grid      { grid-template-columns: 1fr; }
  .projects-featured-grid { grid-template-columns: 1fr; }
  .cert-grid          { grid-template-columns: 1fr; }
  .cert-grid-2        { grid-template-columns: 1fr; }
  .skills-building-grid { grid-template-columns: 1fr; }
  .resume-skills-grid { grid-template-columns: 1fr; }
  .contact-grid       { grid-template-columns: 1fr; }
  .challenge-pair     { grid-template-columns: 1fr; }
  .metrics-grid       { grid-template-columns: repeat(2,1fr); }
  .footer-grid        { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom      { flex-direction: column; gap: 1rem; text-align: center; }
  .footer-link        { overflow-wrap: break-word; }
  .section            { padding: 3.5rem 0; }
  .page-header        { padding: 2.25rem 0 2rem; }
  .skills-full-grid   { grid-template-columns: 1fr; }
  .skills-snapshot-grid { grid-template-columns: 1fr; }
  .about-highlights   { grid-template-columns: 1fr; }
  .personal-grid      { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .container         { padding: 0 1rem; }
  .section           { padding: 2.75rem 0; }
  .hero-img          { width: 150px; height: 170px; }
  .hero-title        { overflow-wrap: anywhere; word-break: break-word; }
  .hero-cta          { flex-direction: column; align-items: stretch; }
  .hero-cta .btn     { justify-content: center; width: 100%; }
  .metrics-grid      { grid-template-columns: 1fr; }
  .screenshot-gallery{ grid-template-columns: 1fr; }
  .arch-node         { min-width: 0; width: 100%; max-width: 240px; }
  .project-snapshot td {
    display: block;
    padding: 0.5rem 1rem;
    border-bottom: none;
  }
  .project-snapshot td:first-child {
    width: auto;
    padding-bottom: 0.15rem;
    border-bottom: none;
  }
  .project-snapshot tr {
    display: block;
    border-bottom: 1px solid var(--border-solid);
  }
  .project-snapshot tr:last-child { border-bottom: none; }
  .cert-grid-2       { grid-template-columns: 1fr; }
  .cert-card         { padding: 1.5rem 1.25rem; }
  .resume-entry-header { flex-direction: column; gap: 0.15rem; }
  .page-header       { padding: 1.75rem 0 1.5rem; }
  .btn-lg            { font-size: 0.875rem; padding: 0.65rem 1.25rem; }
}