/* ============================================================
   TYFSADIK.ORG — Design System v2
   Dark Monospace Technical Portfolio
   ============================================================ */

/* --- Google Fonts ----------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@300;400;500;600;700&display=swap');

/* --- Font Faces ------------------------------------------- */
@font-face {
  font-family: 'DepartureMono';
  src: url('../fonts/DepartureMono-Regular.woff') format('woff');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* --- Variables -------------------------------------------- */
:root {
  --bg:           #0a0a0a;
  --bg-surface:   #111111;
  --bg-elevated:  #181818;
  --border:       #1e1e1e;
  --border-light: #2a2a2a;
  --text:         #e0e0e0;
  --text-muted:   #888888;
  --text-dim:     #555555;
  --accent:       #00d4ff;
  --accent-hover: #00b8e0;
  --accent-dim:   rgba(0, 212, 255, 0.08);
  --accent-glow:  rgba(0, 212, 255, 0.15);
  --accent-border:rgba(0, 212, 255, 0.25);
  --green:        #00ff88;
  --green-dim:    rgba(0, 255, 136, 0.08);
  --green-border: rgba(0, 255, 136, 0.25);
  --yellow:       #ffd700;
  --yellow-dim:   rgba(255, 215, 0, 0.08);
  --yellow-border:rgba(255, 215, 0, 0.25);
  --red:          #ff4444;
  --red-dim:      rgba(255, 68, 68, 0.08);
  --red-border:   rgba(255, 68, 68, 0.25);
  --font:         'DepartureMono', 'IBM Plex Mono', 'Courier New', monospace;
  --radius:       4px;
  --max-width:    920px;
  --nav-height:   56px;
  --ease:         0.18s ease;
}

/* --- Reset ------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 14px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color var(--ease); }
a:hover { color: var(--accent-hover); text-decoration: underline; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
pre, code { font-family: var(--font); }
button { font-family: var(--font); }
p { margin-bottom: 1rem; color: var(--text-muted); font-size: 13px; }
p:last-child { margin-bottom: 0; }

/* --- Layout ----------------------------------------------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.page-content {
  padding-top: calc(var(--nav-height) + 2.5rem);
  padding-bottom: 5rem;
  min-height: 100vh;
}

/* --- Navigation ------------------------------------------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(10, 10, 10, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100;
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 12px;
  font-weight: bold;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color var(--ease);
}
.nav-logo span { color: var(--accent); }
.nav-logo:hover { color: var(--accent); text-decoration: none; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-link {
  color: var(--text-muted);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.35rem 0.7rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  text-decoration: none;
  transition: all var(--ease);
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-dim);
  text-decoration: none;
}
.nav-link.active {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-dim);
}
.nav-mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: all var(--ease);
}
.nav-mobile-toggle:hover { color: var(--accent); border-color: var(--accent-border); }

@media (max-width: 680px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    flex-direction: column;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 0;
    gap: 0;
  }
  .nav-links.open { display: flex; }
  .nav-link {
    padding: 0.75rem 1.5rem;
    border: none;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    width: 100%;
  }
  .nav-mobile-toggle { display: block; }
}

/* --- Breadcrumbs ------------------------------------------ */
.breadcrumbs, .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 2.5rem;
}
.breadcrumbs a, .breadcrumb a { color: var(--text-muted); font-size: 11px; }
.breadcrumbs a:hover, .breadcrumb a:hover { color: var(--accent); text-decoration: none; }
.breadcrumb-sep { color: var(--text-dim); font-size: 10px; }

/* --- Page Header ------------------------------------------ */
.page-header { margin-bottom: 2.5rem; }
.page-header h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: bold;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 0.6rem;
  color: var(--text);
}
.page-header .subtitle {
  color: var(--text-muted);
  font-size: 13px;
  max-width: 600px;
  line-height: 1.7;
}

/* --- Headings --------------------------------------------- */
h1 { color: var(--text); }
h2 {
  font-size: 11px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 1rem;
  margin-top: 2.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
h3 {
  font-size: 13px;
  font-weight: bold;
  color: var(--text);
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}
h2:first-child { margin-top: 0; }
h3:first-child { margin-top: 0; }

/* --- Cards ------------------------------------------------ */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color var(--ease), background var(--ease), transform var(--ease);
}
.card:hover {
  border-color: var(--accent-border);
  background: var(--bg-elevated);
}
a.card, .card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}
a.card:hover, .card-link:hover { text-decoration: none; }
.card h3 { margin-top: 0; }
.card-title { font-size: 13px; font-weight: bold; color: var(--text); margin-bottom: 0.4rem; }
.card-description { color: var(--text-muted); font-size: 12px; line-height: 1.6; margin-bottom: 0.75rem; }
.card-meta { font-size: 11px; color: var(--text-dim); }
.card-category {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

/* --- Project Meta ----------------------------------------- */
.project-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  padding: 0.875rem 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 12px;
}
.meta-year { color: var(--text-dim); font-size: 11px; }
.meta-category {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent-border);
  padding: 0.1rem 0.5rem;
  border-radius: 2px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.meta-link {
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 11px;
  color: var(--text-muted);
  transition: all var(--ease);
}
.meta-link:hover { border-color: var(--accent-border); color: var(--accent); text-decoration: none; }

/* --- Lab Meta --------------------------------------------- */
.lab-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  font-size: 12px;
}
.difficulty {
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: bold;
}
.difficulty-beginner    { background: var(--green-dim);  color: var(--green);  border: 1px solid var(--green-border); }
.difficulty-intermediate{ background: var(--yellow-dim); color: var(--yellow); border: 1px solid var(--yellow-border); }
.difficulty-advanced    { background: var(--red-dim);    color: var(--red);    border: 1px solid var(--red-border); }
.lab-date { color: var(--text-dim); font-size: 11px; }

/* --- Tags ------------------------------------------------- */
.tags { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.tag {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.12rem 0.45rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-dim);
  cursor: default;
  transition: all var(--ease);
  white-space: nowrap;
}
.tag:hover { border-color: var(--accent-border); color: var(--accent); }

/* --- Filter Bar ------------------------------------------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 2rem;
  padding: 0.875rem 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.filter-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  align-self: center;
  margin-right: 0.25rem;
  white-space: nowrap;
}
.filter-btn {
  font-family: var(--font);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--ease);
  white-space: nowrap;
}
.filter-btn:hover { background: var(--accent-dim); color: var(--accent); border-color: var(--accent-border); }
.filter-btn.active { background: var(--accent-dim); color: var(--accent); border-color: var(--accent-border); }

/* --- Grid ------------------------------------------------- */
.card-grid   { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }
.card-grid-2 { display: grid; grid-template-columns: repeat(auto-fill, minmax(380px, 1fr)); gap: 1rem; }

/* --- Code Blocks ------------------------------------------ */
pre {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1rem 0;
  font-size: 12px;
  line-height: 1.65;
  tab-size: 2;
}
code {
  background: rgba(0,212,255,0.07);
  padding: 0.1rem 0.35rem;
  border-radius: 2px;
  font-size: 12px;
  color: var(--accent);
}
pre code {
  background: none;
  padding: 0;
  color: var(--text);
}
.code-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  padding: 0.4rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  margin-top: 1rem;
  display: inline-block;
}
.code-label + pre { margin-top: 0; border-radius: 0 var(--radius) var(--radius) var(--radius); }

/* --- Screenshot Placeholder ------------------------------- */
.screenshot-placeholder {
  background: var(--bg-surface);
  border: 2px dashed var(--border-light);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  letter-spacing: 0.04em;
  margin: 1rem 0;
}
.screenshot-placeholder::before { content: '[ '; color: var(--accent); }
.screenshot-placeholder::after  { content: ' ]'; color: var(--accent); }

/* --- Sections --------------------------------------------- */
section { margin-bottom: 2.5rem; }
section:last-child { margin-bottom: 0; }

section ul { padding-left: 1.25rem; }
section ul li { margin-bottom: 0.4rem; color: var(--text-muted); font-size: 13px; list-style: disc; }
section ul li strong { color: var(--text); }

section ol { padding-left: 1.25rem; }
section ol li { margin-bottom: 0.75rem; color: var(--text-muted); font-size: 13px; }

section p strong { color: var(--text); }

/* --- Hero ------------------------------------------------- */
.hero {
  padding: 2.5rem 0 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}
.hero-eyebrow {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.hero-name {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: bold;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}
.hero-title {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  letter-spacing: 0.04em;
}
.hero-location {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 1.75rem;
}
.hero-bio {
  color: var(--text-muted);
  max-width: 580px;
  font-size: 13px;
  line-height: 1.85;
  margin-bottom: 1.75rem;
}
.hero-links { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.hero-link {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  transition: all var(--ease);
  text-decoration: none;
}
.hero-link:hover { color: var(--accent); border-color: var(--accent-border); background: var(--accent-dim); text-decoration: none; }
.hero-link.primary { background: var(--accent-dim); color: var(--accent); border-color: var(--accent-border); }

/* --- Stat Row --------------------------------------------- */
.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}
.stat { border-left: 2px solid var(--accent); padding-left: 0.75rem; }
.stat-value { font-size: 1.4rem; font-weight: bold; color: var(--text); line-height: 1.1; }
.stat-label { font-size: 10px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.08em; }

/* --- Skills Grid ------------------------------------------ */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0.75rem; margin-top: 0.5rem; }
.skill-category {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  transition: border-color var(--ease);
}
.skill-category:hover { border-color: var(--border-light); }
.skill-category-name {
  color: var(--accent);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  font-weight: bold;
}
.skill-list { color: var(--text-muted); font-size: 12px; line-height: 1.9; }

/* --- Timeline --------------------------------------------- */
.timeline { position: relative; }
.timeline-item {
  position: relative;
  padding-left: 1.75rem;
  padding-bottom: 2rem;
  border-left: 1px solid var(--border);
}
.timeline-item:last-child { border-left-color: transparent; padding-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: -5px; top: 5px;
  width: 9px; height: 9px;
  border: 1px solid var(--accent);
  background: var(--bg);
  border-radius: 50%;
}
.timeline-dot.current { background: var(--accent); }
.timeline-date { font-size: 11px; color: var(--text-dim); margin-bottom: 0.2rem; letter-spacing: 0.04em; }
.timeline-role { font-size: 14px; font-weight: bold; color: var(--text); margin-bottom: 0.15rem; }
.timeline-company { font-size: 12px; color: var(--accent); margin-bottom: 0.5rem; }
.timeline-desc { font-size: 12px; color: var(--text-muted); padding-left: 1rem; }
.timeline-desc li { margin-bottom: 0.2rem; list-style: disc; }

/* --- Cert List -------------------------------------------- */
.cert-list { display: flex; flex-direction: column; gap: 0; }
.cert-item {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 12px;
  color: var(--text-muted);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}
.cert-item:last-child { border-bottom: none; }
.cert-icon { flex-shrink: 0; font-size: 11px; }
.cert-active   .cert-icon { color: var(--green); }
.cert-progress .cert-icon { color: var(--yellow); }

/* --- Category Section ------------------------------------- */
.category-section { margin-bottom: 3rem; }
.category-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.category-header h2 { margin: 0; border: none; padding: 0; }
.category-count {
  font-size: 10px;
  color: var(--text-dim);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 0.1rem 0.4rem;
  border-radius: 2px;
}

/* --- Table ------------------------------------------------ */
table { width: 100%; border-collapse: collapse; font-size: 12px; margin: 1rem 0; }
th {
  text-align: left;
  color: var(--accent);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
td { padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--border); color: var(--text-muted); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg-surface); }

/* --- Divider ---------------------------------------------- */
hr { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }

/* --- Note / Callout --------------------------------------- */
.note {
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius);
  padding: 0.875rem 1rem;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.note strong { color: var(--accent); }

/* --- Back to Top ------------------------------------------ */
.back-to-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  border-radius: var(--radius);
  opacity: 0;
  pointer-events: none;
  transition: all var(--ease);
  z-index: 50;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { color: var(--accent); border-color: var(--accent-border); background: var(--accent-dim); }

/* --- Footer ----------------------------------------------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 4rem;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 11px;
  color: var(--text-dim);
}
.footer a { color: var(--text-dim); }
.footer a:hover { color: var(--accent); text-decoration: none; }
.footer-links { display: flex; gap: 1rem; flex-wrap: wrap; }

/* --- Mermaid Diagrams ------------------------------------- */
.mermaid {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.5rem;
  margin: 1.25rem 0;
  overflow-x: auto;
  text-align: center;
}
.mermaid svg {
  max-width: 100%;
  height: auto;
}
.diagram-label {
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
  margin-top: -0.5rem;
  margin-bottom: 1rem;
  font-style: italic;
}

/* --- Steps ------------------------------------------------ */
.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}
.step:last-child { border-bottom: none; }
.step-num {
  font-size: 11px;
  color: var(--accent);
  font-weight: 600;
  padding-top: 0.15rem;
  letter-spacing: 0.05em;
}
.step-body strong { display: block; margin-bottom: 0.4rem; color: var(--text); }
.step-body p { margin: 0 0 0.75rem; color: var(--text-muted); }

/* --- Command block ---------------------------------------- */
.command-block { display: flex; flex-direction: column; gap: 0.4rem; margin: 0.75rem 0; }
.command {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 0.5rem 0.75rem;
  border-radius: 0 4px 4px 0;
}
.command code {
  font-family: var(--font);
  font-size: 12px;
  color: var(--green);
  background: none;
  padding: 0;
  border: none;
}

/* --- Lab meta --------------------------------------------- */
.lab-meta { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; margin-top: 0.5rem; }
.lab-category { font-size: 11px; color: var(--text-muted); }
.difficulty {
  font-size: 10px;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.difficulty-beginner     { background: var(--green-dim);   color: var(--green);  border: 1px solid var(--green-border); }
.difficulty-intermediate { background: var(--yellow-dim);  color: var(--yellow); border: 1px solid var(--yellow-border); }
.difficulty-advanced     { background: var(--red-dim);     color: var(--red);    border: 1px solid rgba(255,68,68,0.25); }

/* --- Assignments page ------------------------------------- */
.assignment-meta { font-size: 11px; color: var(--text-muted); margin-top: 0.25rem; }
.section-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent-border);
  margin-right: 0.5rem;
}

/* --- Selection & Scrollbar -------------------------------- */
::selection { background: var(--accent); color: var(--bg); }
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* --- Utilities -------------------------------------------- */
.text-accent  { color: var(--accent); }
.text-muted   { color: var(--text-muted); }
.text-dim     { color: var(--text-dim); }
.text-green   { color: var(--green); }
.text-yellow  { color: var(--yellow); }
.text-red     { color: var(--red); }
.hidden       { display: none !important; }
.sr-only      { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* --- Responsive ------------------------------------------- */
@media (max-width: 640px) {
  .card-grid   { grid-template-columns: 1fr; }
  .card-grid-2 { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .stat-row    { gap: 1rem; }
  .hero-name   { font-size: 1.8rem; }
  pre          { font-size: 11px; padding: 1rem; }
  .back-to-top { bottom: 1rem; right: 1rem; }
}