/* ==========================================================================
   Dipesh Baniya — Developer Portfolio
   Design tokens: deep navy dark theme, Space Grotesk + Inter, JetBrains Mono
   for code accents. Signature element: animated node-graph hero background
   + code-window panel, echoing the DSA / ML / systems focus of the profile.
   ========================================================================== */

:root {
  /* Color */
  --bg: #0a0e16;
  --bg-alt: #0e1420;
  --surface: #121a28;
  --surface-2: #17202f;
  --border: #22304333;
  --border-strong: #2a3852;
  --text: #e9ecf3;
  --text-dim: #8b93a7;
  --text-faint: #5c6577;
  --accent: #3b82f6;
  --accent-2: #22d3ee;
  --accent-soft: #3b82f61a;
  --success: #34d399;
  --danger: #f87171;

  /* Type */
  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  /* Layout */
  --container-w: 1180px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --header-h: 76px;

  --shadow-card: 0 1px 0 rgba(255,255,255,0.03) inset, 0 20px 40px -24px rgba(0,0,0,0.6);
  --transition: 220ms cubic-bezier(.4,0,.2,1);
}

[data-theme="light"] {
  --bg: #f6f7fb;
  --bg-alt: #eef0f6;
  --surface: #ffffff;
  --surface-2: #f2f4f9;
  --border: #dde1ea;
  --border-strong: #c9cfdc;
  --text: #12172a;
  --text-dim: #545e75;
  --text-faint: #8b93a7;
  --accent: #2563eb;
  --accent-2: #0891b2;
  --accent-soft: #2563eb14;
  --shadow-card: 0 1px 0 rgba(255,255,255,0.6) inset, 0 20px 40px -28px rgba(20,25,50,0.18);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; margin: 0; color: var(--text); }
p { margin: 0 0 1em; color: var(--text-dim); }
button { font-family: inherit; cursor: pointer; }
input, textarea, button { font-size: 1rem; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 1000;
  background: var(--accent); color: #fff; padding: 12px 18px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #2f6fe0; }
.btn-outline { border-color: var(--border-strong); color: var(--text); background: transparent; }
.btn-outline:hover { border-color: var(--accent); color: var(--accent-2); }
.btn-ghost { color: var(--accent-2); padding: 8px 0; }
.btn-ghost:hover { transform: translateX(3px); }
.btn-sm { padding: 9px 16px; font-size: 0.85rem; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 500;
  height: var(--header-h);
  display: flex; align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}
.site-header.scrolled {
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }

.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  color: #08101f; font-family: var(--font-display); font-weight: 700; font-size: 0.95rem;
}
.logo-text { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; color: var(--text); }
.logo-text span { color: var(--accent-2); }

.main-nav ul { display: flex; gap: 34px; }
.nav-link {
  position: relative; font-size: 0.92rem; font-weight: 500; color: var(--text-dim);
  padding: 6px 0; transition: color var(--transition);
}
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--accent-2); transition: width var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 16px; }

.hamburger {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; background: none; border: 1px solid var(--border-strong); border-radius: 8px;
}
.hamburger span { display: block; width: 18px; height: 2px; margin: 0 auto; background: var(--text); transition: transform var(--transition), opacity var(--transition); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
  background:
    radial-gradient(circle at 15% 20%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 45%),
    radial-gradient(circle at 85% 75%, color-mix(in srgb, var(--accent-2) 10%, transparent), transparent 50%),
    var(--bg);
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.55; pointer-events: none; }

.hero-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 60px; align-items: center;
  padding-top: 40px; padding-bottom: 60px;
}

.eyebrow { font-family: var(--font-mono); color: var(--accent-2); font-size: 0.88rem; margin-bottom: 14px; }
.hero-title { font-size: clamp(2.6rem, 5.2vw, 4.2rem); letter-spacing: -0.02em; margin-bottom: 10px; }
.hero-role { font-size: 1.15rem; color: var(--text); font-weight: 500; margin-bottom: 6px; }
.dot-sep { color: var(--text-faint); margin: 0 4px; }
.hero-typing {
  font-family: var(--font-mono); font-size: 1rem; color: var(--accent-2);
  min-height: 1.6em; margin-bottom: 20px;
}
.cursor { animation: blink 1s step-end infinite; color: var(--accent-2); }
@keyframes blink { 50% { opacity: 0; } }
.hero-lede { max-width: 540px; font-size: 1.03rem; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; margin-bottom: 40px; flex-wrap: wrap; }

.hero-meta { display: flex; flex-wrap: wrap; gap: 24px; }
.hero-meta-item {
  display: inline-flex; align-items: center; gap: 8px; font-size: 0.88rem; color: var(--text-dim);
  transition: color var(--transition);
}
a.hero-meta-item:hover { color: var(--accent-2); }
.hero-meta-item svg { color: var(--accent); flex-shrink: 0; }

.hero-panel { position: relative; }
.code-window {
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-md);
  box-shadow: var(--shadow-card); overflow: hidden;
}
.code-window-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: var(--surface-2); border-bottom: 1px solid var(--border); }
.wdot { width: 10px; height: 10px; border-radius: 50%; }
.wdot-r { background: #f87171; } .wdot-y { background: #fbbf24; } .wdot-g { background: #34d399; }
.code-window-title { margin-left: 10px; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); }
.code-window-body {
  margin: 0; padding: 22px 20px; font-family: var(--font-mono); font-size: 0.84rem; line-height: 1.75;
  color: var(--text-dim); overflow-x: auto;
}
.tok-kw { color: #c084fc; } .tok-cls { color: #22d3ee; } .tok-fn { color: #60a5fa; }
.tok-self { color: #f0abfc; } .tok-str { color: #a3e635; }

.scroll-cue { position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 2; }
.scroll-cue span {
  display: block; width: 22px; height: 36px; border: 2px solid var(--border-strong); border-radius: 12px; position: relative;
}
.scroll-cue span::before {
  content: ""; position: absolute; top: 6px; left: 50%; width: 4px; height: 4px; border-radius: 50%;
  background: var(--accent-2); transform: translateX(-50%);
  animation: scrollDot 1.6s ease-in-out infinite;
}
@keyframes scrollDot { 0% { top: 6px; opacity: 1; } 70% { top: 20px; opacity: 0; } 100% { top: 6px; opacity: 0; } }

/* ---------- Sections (generic) ---------- */
.section { padding: 110px 0; }
.section-alt { background: var(--bg-alt); }
.section-eyebrow { font-family: var(--font-mono); color: var(--accent); font-size: 0.85rem; margin-bottom: 12px; }
.section-title { font-size: clamp(1.7rem, 3vw, 2.4rem); letter-spacing: -0.01em; margin-bottom: 18px; max-width: 760px; }
.section-lede { max-width: 640px; font-size: 1.02rem; margin-bottom: 46px; }

/* reveal-on-scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 700ms ease, transform 700ms ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 60px; align-items: start; }
.about-text p { font-size: 1rem; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-content: start; }
.stat-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 24px 20px; display: flex; flex-direction: column; gap: 6px;
}
.stat-number { font-family: var(--font-display); font-size: 2.1rem; font-weight: 700; color: var(--accent-2); }
.stat-label { font-size: 0.85rem; color: var(--text-dim); }

/* ---------- Skills ---------- */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.skill-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 26px; transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.skill-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow-card); }
.skill-card-head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.skill-icon {
  display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px;
  border-radius: 8px; background: var(--accent-soft); color: var(--accent-2); font-family: var(--font-mono); font-size: 1rem;
}
.skill-card h3 { font-size: 1.02rem; }
.skill-card-wide { grid-column: span 1; }
.badge-list { display: flex; flex-wrap: wrap; gap: 8px; }
.badge {
  font-size: 0.82rem; padding: 7px 13px; border-radius: 999px; background: var(--surface-2);
  border: 1px solid var(--border); color: var(--text-dim); transition: color var(--transition), border-color var(--transition);
}
.skill-card:hover .badge { border-color: var(--border-strong); }

/* ---------- Projects ---------- */
.featured-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.project-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.project-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow-card); }
.project-visual { aspect-ratio: 16/9.5; background: var(--surface-2); border-bottom: 1px solid var(--border); }
.project-svg { width: 100%; height: 100%; }
.pv-bg { fill: var(--surface-2); }
.pv-card { fill: var(--surface); stroke: var(--border-strong); stroke-width: 1; }
.pv-line { fill: var(--text-dim); opacity: 0.7; }
.pv-line-dim { fill: var(--text-faint); opacity: 0.5; }
.pv-accent { fill: var(--accent); opacity: 0.85; }
.pv-accent-bar { fill: var(--accent-2); opacity: 0.7; }
.pv-graph { fill: none; stroke: var(--accent-2); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.pv-slot { fill: var(--surface); stroke: var(--border-strong); }
.pv-slot-fill { fill: var(--accent); opacity: 0.35; }
.pv-axis { stroke: var(--border-strong); stroke-width: 1.5; }
.pv-boundary { stroke: var(--accent-2); stroke-width: 1.5; stroke-dasharray: 4 4; opacity: 0.7; }
.pv-dot-a { fill: var(--accent); } .pv-dot-b { fill: var(--accent-2); } .pv-dot-c { fill: var(--success); }
.pv-frame { fill: var(--surface); stroke: var(--border-strong); }

.project-body { padding: 26px 28px 28px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.project-category { font-family: var(--font-mono); font-size: 0.76rem; color: var(--accent-2); text-transform: uppercase; letter-spacing: 0.04em; }
.project-body h3 { font-size: 1.22rem; margin-bottom: 4px; }
.project-desc { font-size: 0.94rem; }
.project-features { display: flex; flex-direction: column; gap: 6px; margin: 4px 0 6px; }
.project-features li { font-size: 0.86rem; color: var(--text-dim); padding-left: 18px; position: relative; }
.project-features li::before { content: "›"; position: absolute; left: 0; color: var(--accent); }
.tech-badges { display: flex; flex-wrap: wrap; gap: 7px; margin: 4px 0; }
.tech-badge { font-size: 0.75rem; padding: 5px 11px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-2); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); }
.project-skills { font-size: 0.83rem; color: var(--text-faint); }
.project-skills strong { color: var(--text-dim); }
.project-actions { display: flex; gap: 12px; margin-top: auto; padding-top: 8px; flex-wrap: wrap; }

.project-grid-compact { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.project-card-compact {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 24px; transition: transform var(--transition), border-color var(--transition);
}
.project-card-compact:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.project-card-compact h3 { font-size: 1.05rem; margin: 6px 0 8px; }
.project-card-compact p { font-size: 0.88rem; }
.all-projects-note { margin-top: 30px; font-size: 0.86rem; color: var(--text-faint); font-style: italic; }

/* ---------- Education ---------- */
.education-card {
  display: flex; gap: 24px; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 36px; position: relative; overflow: hidden;
}
.education-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}
.education-mark { font-size: 2.2rem; flex-shrink: 0; }
.education-content h3 { font-size: 1.2rem; margin-bottom: 8px; }
.education-org { color: var(--text); font-weight: 500; margin-bottom: 4px; font-size: 0.94rem; }
.education-period { font-family: var(--font-mono); font-size: 0.83rem; color: var(--accent-2); margin-bottom: 14px; }
.education-desc { font-size: 0.92rem; margin-bottom: 0; }

/* ---------- Process ---------- */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.process-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 26px; transition: transform var(--transition), border-color var(--transition);
}
.process-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.process-index { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-faint); display: block; margin-bottom: 14px; }
.process-card h3 { font-size: 1.02rem; margin-bottom: 8px; }
.process-card p { font-size: 0.87rem; margin: 0; }

/* ---------- Strengths ---------- */
.strengths-grid { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.strength-chip {
  padding: 12px 20px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border);
  font-size: 0.9rem; color: var(--text); transition: border-color var(--transition), transform var(--transition), background var(--transition);
}
.strength-chip:hover { border-color: var(--accent); background: var(--accent-soft); transform: translateY(-2px); }
.strengths-note { max-width: 640px; font-size: 0.92rem; }

/* ---------- GitHub Activity ---------- */
.github-panel {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px;
}
.github-panel-info p { font-size: 0.96rem; }
.contrib-grid { display: grid; grid-template-columns: repeat(26, 1fr); gap: 4px; }
.contrib-cell { width: 100%; aspect-ratio: 1; border-radius: 2px; background: var(--surface-2); }
.contrib-cell.l1 { background: color-mix(in srgb, var(--success) 25%, var(--surface-2)); }
.contrib-cell.l2 { background: color-mix(in srgb, var(--success) 50%, var(--surface-2)); }
.contrib-cell.l3 { background: color-mix(in srgb, var(--success) 75%, var(--surface-2)); }
.contrib-cell.l4 { background: var(--success); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 50px; }
.contact-info { display: flex; flex-direction: column; gap: 20px; align-self: start; }
.contact-info-item {
  display: flex; align-items: center; gap: 14px; font-size: 0.94rem; color: var(--text-dim);
  padding: 14px 16px; border-radius: var(--radius-sm); border: 1px solid var(--border); transition: border-color var(--transition), color var(--transition);
}
a.contact-info-item:hover { border-color: var(--accent); color: var(--text); }
.contact-info-item svg { color: var(--accent); flex-shrink: 0; }

.contact-form { display: flex; flex-direction: column; gap: 18px; }
.form-row { display: flex; flex-direction: column; gap: 8px; }
.form-row label { font-size: 0.86rem; font-weight: 500; color: var(--text-dim); }
.form-row input, .form-row textarea {
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  padding: 13px 15px; color: var(--text); font-family: var(--font-body); resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-row input:focus, .form-row textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.form-submit { align-self: flex-start; }
.form-status { font-size: 0.86rem; min-height: 1.2em; color: var(--success); }
.form-status.error { color: var(--danger); }

/* ---------- Footer ---------- */
.site-footer { background: var(--bg-alt); border-top: 1px solid var(--border); padding-top: 50px; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 30px; flex-wrap: wrap; padding-bottom: 30px; }
.footer-brand { display: flex; align-items: flex-start; gap: 12px; max-width: 340px; }
.footer-brand p { font-size: 0.88rem; margin: 0; }
.footer-nav { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-nav a { font-size: 0.88rem; color: var(--text-dim); transition: color var(--transition); }
.footer-nav a:hover { color: var(--accent-2); }
.footer-social { display: flex; gap: 14px; }
.footer-social a {
  display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px;
  border-radius: 8px; border: 1px solid var(--border); color: var(--text-dim); transition: color var(--transition), border-color var(--transition);
}
.footer-social a:hover { color: var(--accent-2); border-color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--border); padding: 20px 28px; font-size: 0.82rem; color: var(--text-faint);
}
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px;
  border-radius: 8px; border: 1px solid var(--border); background: transparent; color: var(--text-dim);
}
.theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: inline; }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 900; display: none;
  background: rgba(4,7,14,0.72); backdrop-filter: blur(4px);
  align-items: center; justify-content: center; padding: 24px;
}
.modal-overlay.open { display: flex; }
.modal {
  display: none; background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  max-width: 620px; width: 100%; max-height: 85vh; overflow-y: auto; padding: 36px 34px; position: relative;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.6);
}
.modal.open { display: block; }
.modal h3 { font-size: 1.4rem; margin: 8px 0 14px; }
.modal h4 { font-size: 0.92rem; margin: 18px 0 10px; color: var(--text); }
.modal p { font-size: 0.94rem; }
.modal ul { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.modal ul li { font-size: 0.88rem; color: var(--text-dim); padding-left: 18px; position: relative; }
.modal ul li::before { content: "›"; position: absolute; left: 0; color: var(--accent); }
.modal .tech-badges { margin-bottom: 20px; }
.modal-close {
  position: absolute; top: 18px; right: 18px; width: 34px; height: 34px; border-radius: 8px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim); font-size: 1.3rem; line-height: 1;
}
.modal-close:hover { color: var(--text); border-color: var(--accent); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-panel { order: -1; max-width: 480px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: repeat(4, 1fr); }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .featured-grid, .project-grid-compact { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .github-panel { grid-template-columns: 1fr; }
}

@media (max-width: 780px) {
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
    background: var(--bg); border-top: 1px solid var(--border);
    transform: translateY(-110%); opacity: 0; visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
    padding: 30px 28px; z-index: 400;
  }
  .main-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav .nav-link { display: block; padding: 14px 4px; font-size: 1.05rem; border-bottom: 1px solid var(--border); }
  .hamburger { display: flex; }
  .header-actions .btn-outline.btn-sm span { display: none; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .container { padding: 0 20px; }
  .section { padding: 76px 0; }
}

@media (max-width: 560px) {
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .skills-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .education-card { flex-direction: column; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .modal { padding: 28px 22px; }
}