/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-50:  #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-300: #93c5fd;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-800: #1e40af;
  --blue-900: #1e3a8a;
  --blue-950: #172554;

  --dark:     #060d1f;
  --dark-2:   #0a1628;
  --dark-3:   #0f1f3d;
  --dark-card:#0d1b36;
  --text:     #e2e8f0;
  --text-dim: #94a3b8;
  --accent:   #38bdf8;
  --accent2:  #818cf8;
  --green:    #22c55e;
  --red:      #ef4444;
  --gold:     #f59e0b;

  --radius:   12px;
  --radius-lg:20px;
  --shadow:   0 4px 24px rgba(0,0,0,0.4);
  --shadow-blue: 0 4px 24px rgba(59,130,246,0.25);
  --glass:    rgba(14,30,70,0.55);
  --glass-border: rgba(96,165,250,0.18);

  --font: 'Inter', sans-serif;
  --mono: 'JetBrains Mono', monospace;

  --nav-h: 64px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--dark);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--blue-400); text-decoration: none; }
a:hover { color: var(--accent); }
code {
  font-family: var(--mono);
  background: rgba(59,130,246,0.15);
  color: var(--accent);
  padding: 2px 7px;
  border-radius: 5px;
  font-size: .88em;
}
pre {
  font-family: var(--mono);
  font-size: .85rem;
  color: var(--blue-200);
  line-height: 1.6;
  overflow-x: auto;
}
ul, ol { padding-left: 1.4em; }
li { margin-bottom: .3em; }
strong { color: var(--blue-200); }
img { max-width: 100%; display: block; }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark-2); }
::-webkit-scrollbar-thumb { background: var(--blue-700); border-radius: 3px; }

/* ── PROGRESS BAR ── */
#progress-bar {
  position: fixed; top: 0; left: 0; z-index: 9999;
  height: 3px; width: 0;
  background: linear-gradient(90deg, var(--blue-600), var(--accent), var(--accent2));
  transition: width .1s linear;
  box-shadow: 0 0 10px var(--blue-400);
}

/* ── PARTICLES ── */
#particles-canvas {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none; opacity: .5;
}

/* ── CONTAINER ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; position: relative; z-index: 1; }

/* ── NAVBAR ── */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(6,13,31,.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: box-shadow .3s;
}
#navbar.scrolled { box-shadow: 0 2px 30px rgba(0,0,0,.5); }

.nav-inner {
  max-width: 1300px; margin: 0 auto;
  height: 100%; display: flex; align-items: center;
  padding: 0 1.5rem; gap: 2rem;
}
.nav-logo {
  display: flex; align-items: center; gap: .5rem;
  color: var(--blue-200); font-weight: 700; font-size: 1.1rem;
  text-decoration: none; white-space: nowrap;
}
.logo-icon { font-size: 1.3rem; }
.nav-links {
  display: flex; gap: .2rem; list-style: none;
  padding: 0; margin: 0; flex: 1; flex-wrap: wrap;
}
.nav-links a {
  padding: .35rem .7rem; border-radius: 7px;
  color: var(--text-dim); font-size: .82rem; font-weight: 500;
  transition: all .2s; text-decoration: none;
}
.nav-links a:hover, .nav-links a.active {
  background: rgba(59,130,246,.15);
  color: var(--blue-300);
}
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px; margin-left: auto;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s; }

/* ── REVEAL ANIMATION ── */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ── GRADIENT TEXT ── */
.gradient-text {
  background: linear-gradient(135deg, var(--blue-400), var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.75rem; border-radius: 10px;
  font-weight: 600; font-size: .95rem; cursor: pointer;
  text-decoration: none; transition: all .25s;
  border: none; outline: none;
}
.btn:focus-visible { outline: 2px solid var(--blue-400); outline-offset: 2px; }
.btn-primary {
  background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
  color: #fff;
  box-shadow: 0 0 20px rgba(59,130,246,.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(59,130,246,.55);
  color: #fff;
}
.btn-ghost {
  background: var(--glass); color: var(--blue-300);
  border: 1px solid var(--glass-border);
}
.btn-ghost:hover {
  background: rgba(59,130,246,.2);
  transform: translateY(-2px);
  color: var(--blue-200);
}

/* ── SECTION TAGS ── */
.section-tag, .part-tag {
  display: inline-block;
  background: rgba(59,130,246,.15);
  color: var(--blue-400);
  border: 1px solid rgba(59,130,246,.3);
  border-radius: 30px;
  padding: .25rem 1rem;
  font-size: .8rem; font-weight: 600;
  letter-spacing: .05em; text-transform: uppercase;
  margin-bottom: .75rem;
}

/* ── SECTION HEADER ── */
.section-header {
  text-align: center; margin-bottom: 3rem;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800; line-height: 1.2;
  margin-bottom: .75rem; color: var(--blue-100);
}
.section-header p { color: var(--text-dim); font-size: 1.05rem; }

/* ─────────────────────────────────────────────────────────
   HERO
───────────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; padding: calc(var(--nav-h) + 2rem) 1.5rem 4rem;
  position: relative; overflow: hidden;
}
.hero-bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,.05) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridShift 20s linear infinite;
}
@keyframes gridShift { from { transform: translate(0,0); } to{ transform: translate(60px, 60px); } }

.hero-content { position: relative; z-index: 1; max-width: 860px; }

.hero-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  background: rgba(59,130,246,.12);
  border: 1px solid rgba(59,130,246,.3);
  color: var(--blue-300); border-radius: 30px;
  padding: .4rem 1.1rem; font-size: .82rem; font-weight: 600;
  margin-bottom: 1.5rem;
}
.badge-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.6;transform:scale(1.3)} }

.hero-title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 900; line-height: 1.1;
  margin-bottom: 1.25rem; color: #fff;
}
.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-dim); max-width: 640px;
  margin: 0 auto 2rem;
}
.hero-ctas { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 3rem; }

.hero-stats {
  display: flex; align-items: center; justify-content: center;
  gap: 2rem; flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; gap: .2rem; }
.stat-number { font-size: 1.8rem; font-weight: 800; color: var(--blue-400); line-height: 1; }
.stat-label { font-size: .75rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: .05em; }
.stat-div { width: 1px; height: 36px; background: var(--glass-border); }

.hero-scroll-hint {
  position: absolute; bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
  color: var(--text-dim); font-size: .75rem; letter-spacing: .1em;
}
.scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(var(--blue-400), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine { 0%,100%{opacity:1;transform:scaleY(1)} 50%{opacity:.3;transform:scaleY(.5)} }

/* ─────────────────────────────────────────────────────────
   INTRO
───────────────────────────────────────────────────────── */
.intro-section {
  padding: 5rem 0;
  background: linear-gradient(180deg, var(--dark) 0%, var(--dark-2) 100%);
}
.intro-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 4rem; align-items: center;
}
.intro-text h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 1rem; color: var(--blue-100); }
.intro-text p { color: var(--text-dim); margin-bottom: 1.25rem; }

.feature-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: .6rem; }
.feature-list li { display: flex; align-items: center; gap: .75rem; color: var(--text); }
.feature-icon { font-size: 1.1rem; }

.intro-quote {
  background: rgba(59,130,246,.1);
  border-left: 3px solid var(--blue-500);
  padding: 1rem 1.25rem;
  border-radius: 0 8px 8px 0;
  font-style: italic; color: var(--blue-200) !important;
}

/* AI Card */
.ai-card {
  background: var(--glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-blue);
}
.ai-card-header {
  background: rgba(59,130,246,.15);
  padding: .75rem 1rem;
  display: flex; align-items: center; gap: .75rem;
  border-bottom: 1px solid var(--glass-border);
  font-size: .85rem; font-weight: 600; color: var(--blue-200);
}
.ai-dots { display: flex; gap: .4rem; }
.ai-dots span { width: 10px; height: 10px; border-radius: 50%; }
.ai-dots span:nth-child(1) { background: #ef4444; }
.ai-dots span:nth-child(2) { background: #f59e0b; }
.ai-dots span:nth-child(3) { background: #22c55e; }

.ai-chat { padding: 1.25rem; display: flex; flex-direction: column; gap: 1rem; }
.ai-msg { padding: .75rem 1rem; border-radius: 10px; font-size: .88rem; max-width: 85%; }
.ai-msg.user {
  background: rgba(59,130,246,.25);
  border: 1px solid rgba(59,130,246,.3);
  color: var(--blue-100); align-self: flex-end;
}
.ai-msg.bot {
  background: rgba(14,30,70,.8);
  border: 1px solid var(--glass-border);
  color: var(--text);
}
.typing-dots { display: flex; gap: .3rem; margin-bottom: .5rem; }
.typing-dots span {
  width: 7px; height: 7px; background: var(--blue-400); border-radius: 50%;
  animation: typingBounce 1.4s infinite ease-in-out;
}
.typing-dots span:nth-child(2) { animation-delay: .2s; }
.typing-dots span:nth-child(3) { animation-delay: .4s; }
@keyframes typingBounce { 0%,80%,100%{transform:scale(0)} 40%{transform:scale(1)} }
.bot-text { font-size: .85rem; line-height: 1.6; }

.ai-status {
  padding: .75rem 1rem;
  border-top: 1px solid var(--glass-border);
  display: flex; align-items: center; gap: .5rem;
  font-size: .8rem; color: var(--text-dim);
}
.status-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  animation: pulse 2s infinite;
}

/* ─────────────────────────────────────────────────────────
   CONTENT SECTIONS
───────────────────────────────────────────────────────── */
.content-section { padding: 5rem 0; position: relative; }
.alt-bg { background: var(--dark-2); }

/* Image cards */
.img-card {
  background: var(--dark-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
}
.img-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(59,130,246,.2);
}
.img-card img { width: 100%; object-fit: cover; }
.img-label {
  padding: .5rem .85rem;
  font-size: .78rem; color: var(--text-dim);
  border-top: 1px solid var(--glass-border);
  background: rgba(0,0,0,.2);
}
.img-card.sm .img-label { font-size: .72rem; }
.img-card.mt-sm { margin-top: .75rem; }

/* Extra image rows */
.img-row, .extra-imgs-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .75rem; margin-top: 1.5rem;
}

/* ── PART 1 SPECIFIC ── */
.requirements-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 1.25rem; margin-bottom: 3rem;
}
.req-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 1.5rem;
  text-align: center; transition: transform .3s, box-shadow .3s;
}
.req-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-blue); }
.req-icon { font-size: 2rem; margin-bottom: .5rem; }
.req-card h4 { color: var(--blue-200); margin-bottom: .25rem; }
.req-card p { color: var(--text-dim); font-size: .9rem; }

.steps-layout {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 3rem; align-items: start;
}
.steps-content h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 1.5rem; color: var(--blue-200); }

.step-block {
  display: flex; gap: 1rem; margin-bottom: 1.75rem;
  align-items: flex-start;
}
.step-num {
  font-size: 2rem; font-weight: 900;
  color: rgba(59,130,246,.25); line-height: 1;
  min-width: 2.5rem; font-variant-numeric: tabular-nums;
}
.step-body h4 { font-size: 1rem; font-weight: 700; color: var(--blue-200); margin-bottom: .5rem; }
.step-body ul, .step-body ol { color: var(--text-dim); }
.step-body li { margin-bottom: .35rem; }

.mode-table {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); overflow: hidden;
  margin-top: 1.5rem;
}
.mode-row {
  display: grid; grid-template-columns: 1fr 2fr auto;
  gap: 1rem; padding: .8rem 1rem;
  border-bottom: 1px solid var(--glass-border);
  font-size: .88rem; align-items: center;
}
.mode-row:last-child { border-bottom: none; }
.mode-row.header { background: rgba(59,130,246,.12); font-weight: 700; color: var(--blue-300); }
.mode-row.highlight { background: rgba(59,130,246,.08); }
.tag-slow { background: rgba(239,68,68,.15); color: var(--red); padding: .2rem .6rem; border-radius: 20px; font-size: .75rem; }
.tag-rec { background: rgba(34,197,94,.15); color: var(--green); padding: .2rem .6rem; border-radius: 20px; font-size: .75rem; font-weight: 700; }
.tag-fast { background: rgba(245,158,11,.15); color: var(--gold); padding: .2rem .6rem; border-radius: 20px; font-size: .75rem; }

/* ── PART 2 SPECIFIC ── */
.two-panel {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 2rem; margin-bottom: 2rem;
}
.panel-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: transform .3s;
}
.panel-card:hover { transform: translateY(-4px); }
.panel-img img { width: 100%; height: 200px; object-fit: cover; }
.panel-body { padding: 1.5rem; }
.panel-body h3 { font-size: 1.1rem; font-weight: 700; color: var(--blue-200); margin-bottom: .75rem; }
.panel-body p { color: var(--text-dim); font-size: .9rem; margin-bottom: 1rem; }

.check-list { list-style: none; padding: 0; }
.check-list li {
  padding: .4rem 0; border-bottom: 1px solid rgba(59,130,246,.08);
  font-size: .88rem; color: var(--text);
}
.check-list li::before { content: '▸ '; color: var(--blue-400); }
.check-list li:last-child { border-bottom: none; }

.tips-box {
  background: rgba(59,130,246,.1);
  border: 1px solid rgba(59,130,246,.2);
  border-radius: 8px; padding: .75rem 1rem;
  font-size: .85rem; color: var(--blue-200);
  margin-top: 1rem;
}

.shortcuts-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: .5rem; margin-top: 1rem;
}
.shortcut {
  background: rgba(0,0,0,.3);
  border: 1px solid var(--glass-border);
  border-radius: 7px; padding: .5rem .75rem;
  font-size: .8rem; color: var(--text-dim);
  display: flex; align-items: center; gap: .5rem;
}
kbd {
  background: var(--blue-800);
  color: var(--blue-100);
  padding: .15rem .45rem;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: .78rem;
  border: 1px solid var(--blue-700);
}
.extra-images { margin-top: 1.5rem; }

/* ── PART 3 SPECIFIC ── */
.browser-layout {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 3rem; align-items: start;
}
.browser-steps h3 { font-size: 1.1rem; font-weight: 700; color: var(--blue-200); margin-bottom: 1.25rem; }

.timeline { display: flex; flex-direction: column; gap: 0; margin-bottom: 1.5rem; }
.tl-item {
  display: flex; gap: 1rem; align-items: flex-start;
  padding-bottom: 1.1rem; position: relative;
}
.tl-item:before {
  content: ''; position: absolute;
  left: 16px; top: 32px;
  width: 2px; height: calc(100% - 16px);
  background: linear-gradient(var(--blue-700), transparent);
}
.tl-item:last-child:before { display: none; }
.tl-num {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
  color: #fff; font-weight: 700; font-size: .85rem;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; z-index: 1;
  box-shadow: 0 0 12px rgba(59,130,246,.4);
}
.tl-content { padding-top: .35rem; font-size: .9rem; color: var(--text-dim); line-height: 1.5; }

.browser-caps h3 { font-size: 1.1rem; font-weight: 700; color: var(--blue-200); margin-bottom: 1.25rem; }
.cap-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: .75rem;
}
.cap-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1rem; text-align: center;
  font-size: .88rem; color: var(--text);
  display: flex; flex-direction: column; gap: .4rem;
  transition: all .2s;
}
.cap-item:hover { background: rgba(59,130,246,.15); border-color: var(--blue-500); }
.cap-item span { font-size: 1.5rem; }

.example-box {
  background: rgba(56,189,248,.08);
  border: 1px solid rgba(56,189,248,.2);
  border-radius: var(--radius); padding: 1.25rem;
  margin-top: 1.5rem;
}
.example-label { font-size: .8rem; font-weight: 700; color: var(--accent); margin-bottom: .5rem; }
.example-box p { color: var(--text-dim); font-style: italic; font-size: .9rem; }

/* ── PART 4 SPECIFIC ── */
.ai-work-grid {
  display: grid; grid-template-columns: 1fr 1.6fr;
  gap: 3rem; align-items: start;
}
.tips-section { margin-bottom: 2rem; }
.tips-section h3 { font-size: 1.05rem; font-weight: 700; color: var(--blue-200); margin-bottom: 1rem; }

.qa-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.qa-good, .qa-bad {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 1rem;
}
.qa-label { font-size: .78rem; font-weight: 700; margin-bottom: .6rem; padding: .2rem 0; }
.qa-label.good { color: var(--green); }
.qa-label.bad { color: var(--red); }
.qa-good ul, .qa-bad ul { font-size: .85rem; color: var(--text-dim); }

.code-examples { display: flex; flex-direction: column; gap: .5rem; }
.code-line {
  background: var(--dark-3);
  border: 1px solid var(--glass-border);
  border-radius: 7px; padding: .6rem 1rem;
  font-size: .88rem; color: var(--text-dim);
}

.mode-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.mode-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 1rem;
  transition: all .25s;
}
.mode-card:hover { transform: translateY(-3px); }
.mode-card.planning { border-left: 3px solid var(--blue-500); }
.mode-card.fast { border-left: 3px solid var(--gold); }
.mode-card h4 { font-size: .95rem; font-weight: 700; color: var(--blue-200); margin-bottom: .4rem; }
.mode-card p { font-size: .83rem; color: var(--text-dim); }
.mode-use { margin-top: .5rem; font-size: .78rem !important; color: var(--accent) !important; font-style: italic; }

/* ── PART 5 SPECIFIC ── */
.artifacts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.artifact-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: transform .3s;
}
.artifact-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-blue); }
.artifact-img img { width: 100%; height: 200px; object-fit: cover; }
.artifact-info { padding: 1.25rem; }
.artifact-num { font-size: 2rem; font-weight: 900; color: rgba(59,130,246,.2); line-height: 1; }
.artifact-info h3 { font-size: 1.1rem; font-weight: 700; color: var(--blue-200); margin-bottom: .4rem; }
.artifact-info p { font-size: .88rem; color: var(--text-dim); }
.artifact-types { grid-column: 1 / -1; }
.artifact-types h3 { font-size: 1.1rem; font-weight: 700; color: var(--blue-200); margin-bottom: 1.25rem; }
.artifact-type-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem; margin-bottom: 1.5rem; }
.at-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 1.25rem;
  text-align: center; transition: all .25s;
}
.at-item:hover { border-color: var(--blue-500); background: rgba(59,130,246,.1); transform: translateY(-3px); }
.at-icon { font-size: 1.5rem; margin-bottom: .5rem; display: block; }
.at-item h4 { font-size: .85rem; font-weight: 700; color: var(--blue-200); margin-bottom: .25rem; }
.at-item p { font-size: .78rem; color: var(--text-dim); }

/* ── PART 6 SPECIFIC ── */
.feedback-layout { display: grid; grid-template-columns: 1fr 1.4fr; gap: 3rem; }
.feedback-steps h3 { font-size: 1.1rem; font-weight: 700; color: var(--blue-200); margin-bottom: 1.25rem; }
.feedback-flow { margin-bottom: 1.5rem; }
.ff-item {
  display: flex; gap: 1rem; align-items: center;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: .85rem 1rem;
}
.ff-num {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--blue-700); color: #fff;
  font-weight: 700; font-size: .8rem;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.ff-item p { font-size: .88rem; color: var(--text-dim); margin: 0; }
.ff-arrow { text-align: center; color: var(--blue-600); padding: .2rem 0; font-size: 1.1rem; }

.feedback-example h3 { font-size: 1.1rem; font-weight: 700; color: var(--blue-200); margin-bottom: 1.25rem; }
.convo-flow { display: flex; flex-direction: column; gap: .5rem; }
.convo-item {
  padding: .75rem 1rem; border-radius: var(--radius);
  border: 1px solid var(--glass-border);
}
.convo-item.req {
  background: rgba(59,130,246,.08);
  border-color: rgba(59,130,246,.2);
}
.convo-item.ai {
  background: rgba(129,140,248,.06);
  border-color: rgba(129,140,248,.15);
}
.convo-item.final { border-color: rgba(34,197,94,.3); background: rgba(34,197,94,.05); }
.convo-label { font-size: .72rem; font-weight: 700; color: var(--text-dim); margin-bottom: .3rem; text-transform: uppercase; letter-spacing: .05em; }
.convo-item p { font-size: .88rem; color: var(--text); margin: 0; }

/* ── PART 7 SPECIFIC ── */
.custom-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 3rem; }
.custom-extra-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-top: .75rem; }
.custom-content h3, .custom-block h3 { font-size: 1.05rem; font-weight: 700; color: var(--blue-200); margin-bottom: .75rem; }
.custom-block { margin-bottom: 2rem; }

.code-block {
  background: var(--dark-3);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); overflow: hidden;
  margin-bottom: .75rem;
}
.code-header {
  background: rgba(59,130,246,.1);
  border-bottom: 1px solid var(--glass-border);
  padding: .5rem 1rem;
  display: flex; align-items: center; gap: .75rem;
  font-size: .8rem; color: var(--text-dim); font-family: var(--mono);
}
.lang-tag {
  background: rgba(59,130,246,.25); color: var(--blue-300);
  border-radius: 4px; padding: .1rem .5rem; font-size: .72rem; font-weight: 700;
}
.code-block pre { padding: 1rem; }
.how-to {
  font-size: .82rem; color: var(--text-dim);
  background: rgba(0,0,0,.2);
  border-radius: 7px; padding: .5rem .85rem;
}

/* ── PART 8 SPECIFIC ── */
.skills-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 3rem; }
.why-skills { margin-bottom: 1.5rem; }
.why-skills h3, .skill-structure h3, .skill-example h3, .skill-scope h3 {
  font-size: 1.05rem; font-weight: 700; color: var(--blue-200); margin-bottom: .75rem;
}
.skill-structure, .skill-example, .skill-scope { margin-bottom: 1.5rem; }
.skill-steps { display: flex; flex-direction: column; gap: .75rem; }
.skill-step {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: .75rem 1rem;
  display: flex; align-items: center; gap: .75rem;
  font-size: .88rem; color: var(--text-dim);
}
.step-badge {
  background: var(--blue-700); color: #fff;
  font-size: .72rem; font-weight: 700;
  padding: .2rem .6rem; border-radius: 20px; white-space: nowrap;
}
.scope-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.scope-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 1.25rem; text-align: center;
  transition: all .25s;
}
.scope-card:hover { transform: translateY(-3px); }
.scope-card.global { border-top: 3px solid var(--blue-500); }
.scope-card.workspace { border-top: 3px solid var(--accent2); }
.scope-icon { font-size: 1.5rem; margin-bottom: .5rem; display: block; }
.scope-card h4 { font-size: .95rem; font-weight: 700; color: var(--blue-200); margin-bottom: .35rem; }
.scope-card code { display: block; margin-bottom: .35rem; }
.scope-card p { font-size: .82rem; color: var(--text-dim); }

/* ── PART 9 SPECIFIC ── */
.security-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 3rem; }
.security-block { margin-bottom: 2rem; }
.security-block h3 { font-size: 1.05rem; font-weight: 700; color: var(--blue-200); margin-bottom: .75rem; }
.security-modes { display: flex; flex-direction: column; gap: .75rem; }
.sec-mode {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 1rem;
  transition: all .25s;
}
.sec-mode:hover { transform: translateX(4px); }
.sec-mode-header { display: flex; align-items: center; gap: .5rem; margin-bottom: .4rem; }
.sec-mode.off { border-left: 3px solid var(--green); }
.sec-mode.auto { border-left: 3px solid var(--gold); }
.sec-mode.turbo { border-left: 3px solid var(--red); }
.sec-mode h4 { font-size: .95rem; font-weight: 700; color: var(--blue-200); }
.sec-mode p { font-size: .85rem; color: var(--text-dim); }
.sec-icon { font-size: 1.1rem; }

.list-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.list-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 1.25rem;
}
.list-card.allow { border-top: 3px solid var(--green); }
.list-card.deny { border-top: 3px solid var(--red); }
.list-card h4 { font-size: .95rem; font-weight: 700; margin-bottom: .5rem; }
.list-card.allow h4 { color: var(--green); }
.list-card.deny h4 { color: var(--red); }
.list-card p { font-size: .85rem; color: var(--text-dim); margin-bottom: .5rem; }
.list-card code { display: block; margin-bottom: .5rem; }

/* ── PART 10 SPECIFIC ── */
.examples-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.ex-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 1.75rem;
  position: relative; overflow: hidden;
  transition: all .3s;
}
.ex-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-blue); border-color: var(--blue-500); }
.ex-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--blue-600), var(--accent));
}
.ex-num {
  font-size: 3rem; font-weight: 900;
  color: rgba(59,130,246,.12); line-height: 1;
  position: absolute; top: 1rem; right: 1.25rem;
}
.ex-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--blue-200); margin-bottom: .75rem; }
.ex-req {
  background: rgba(59,130,246,.12); border-left: 3px solid var(--blue-500);
  padding: .75rem 1rem; border-radius: 0 8px 8px 0;
  font-size: .85rem; color: var(--blue-100);
  font-style: italic; margin-bottom: 1rem;
}
.ex-steps { font-size: .88rem; color: var(--text-dim); margin-bottom: 1rem; }
.ex-steps p { font-weight: 700; color: var(--blue-300); margin-bottom: .4rem; }
.ex-steps ol { padding-left: 1.2em; }
.ex-tips {
  font-size: .82rem; color: var(--text-dim);
  border-top: 1px solid var(--glass-border); padding-top: .75rem;
}

/* ── TIPS SECTION ── */
.tips-section-main {
  padding: 5rem 0;
  background: linear-gradient(180deg, var(--dark-2), var(--dark));
}
.tips-cards {
  display: grid; grid-template-columns: repeat(5,1fr);
  gap: 1.25rem;
}
.tip-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 1.5rem;
  transition: all .3s;
}
.tip-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-blue); }
.tip-icon { font-size: 1.75rem; margin-bottom: .75rem; }
.tip-card h4 { font-size: .95rem; font-weight: 700; color: var(--blue-200); margin-bottom: .75rem; }
.tip-card ul, .tip-card ol { font-size: .85rem; color: var(--text-dim); }
.tip-card p { font-size: .85rem; color: var(--text-dim); }
.shortcuts-list { display: flex; flex-direction: column; gap: .45rem; }
.shortcuts-list div { display: flex; align-items: center; gap: .5rem; font-size: .82rem; color: var(--text-dim); }

/* ── FAQ ── */
.faq-section { padding: 5rem 0; background: var(--dark-2); }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: .5rem; }
.faq-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius); overflow: hidden;
  transition: border-color .2s;
}
.faq-item.open { border-color: var(--blue-500); }
.faq-q {
  width: 100%; text-align: left;
  background: none; border: none; cursor: pointer;
  padding: 1.1rem 1.25rem; font-size: .95rem;
  font-weight: 600; color: var(--text);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font);
  transition: background .2s; outline: none;
}
.faq-q:focus-visible { outline: 2px solid var(--blue-400); outline-offset: -2px; }
.faq-q:hover { background: rgba(59,130,246,.08); }
.faq-q::after {
  content: '+'; font-size: 1.2rem; color: var(--blue-400);
  transition: transform .3s;
}
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
  font-size: .88rem; color: var(--text-dim); padding: 0 1.25rem;
}
.faq-item.open .faq-a { max-height: 200px; padding: 0 1.25rem 1.1rem; }

/* ── CONCLUSION ── */
.conclusion-section {
  padding: 5rem 0;
  background: linear-gradient(135deg, var(--dark), var(--dark-3));
}
.conclusion-content { text-align: center; }
.conclusion-content h2 { font-size: 2rem; font-weight: 800; color: var(--blue-100); margin-bottom: 1rem; }
.conclusion-lead { color: var(--text-dim); max-width: 600px; margin: 0 auto 2.5rem; font-size: 1.05rem; }

.conclusion-grid {
  display: grid; grid-template-columns: repeat(5,1fr);
  gap: 1rem; max-width: 1000px; margin: 0 auto 3rem;
}
.conc-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 1.25rem;
  display: flex; gap: .75rem; text-align: left;
  align-items: flex-start;
  transition: all .3s;
}
.conc-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-blue); }
.conc-num {
  font-size: 1.5rem; font-weight: 900;
  color: var(--blue-500); line-height: 1; flex-shrink: 0;
}
.conc-item h4 { font-size: .88rem; font-weight: 700; color: var(--blue-200); margin-bottom: .2rem; }
.conc-item p { font-size: .8rem; color: var(--text-dim); }

.next-steps { margin-top: 2rem; }
.next-steps h3 { font-size: 1.2rem; font-weight: 700; color: var(--blue-200); margin-bottom: 1.25rem; }
.ns-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; max-width: 700px; margin: 0 auto; }
.ns-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 1.5rem;
  text-align: center; text-decoration: none;
  transition: all .3s;
}
.ns-card:hover { border-color: var(--blue-500); transform: translateY(-4px); box-shadow: var(--shadow-blue); }
.ns-card span { font-size: 2rem; display: block; margin-bottom: .5rem; }
.ns-card h4 { font-size: .9rem; font-weight: 700; color: var(--blue-200); margin-bottom: .3rem; }
.ns-card p { font-size: .78rem; color: var(--text-dim); }

/* ── FOOTER ── */
footer {
  background: var(--dark-3);
  border-top: 1px solid var(--glass-border);
  padding: 2.5rem 0;
}
.footer-inner { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 1rem; }
.footer-logo { display: flex; align-items: center; gap: .5rem; font-weight: 700; color: var(--blue-200); font-size: 1rem; }
.footer-note { color: var(--text-dim); font-size: .85rem; max-width: 500px; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: var(--text-dim); font-size: .85rem; transition: color .2s; }
.footer-links a:hover { color: var(--blue-300); }
.footer-copy { font-size: .78rem; color: rgba(148,163,184,.4); }

/* ── BACK TO TOP ── */
#back-to-top {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 200;
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
  color: #fff; border: none; border-radius: 50%;
  cursor: pointer; font-size: 1.1rem;
  box-shadow: 0 4px 15px rgba(37,99,235,.4);
  opacity: 0; transform: translateY(20px);
  transition: all .3s; pointer-events: none; outline: none;
}
#back-to-top:focus-visible { outline: 2px solid var(--blue-300); outline-offset: 2px; }
#back-to-top.visible { opacity: 1; transform: none; pointer-events: all; }
#back-to-top:hover { transform: translateY(-3px); box-shadow: 0 6px 25px rgba(37,99,235,.6); }

/* ── SERVICES PAGE SPECIFIC ── */
.services-intro { padding: 5rem 0; background: linear-gradient(180deg, var(--dark), var(--dark-2)); }
.services-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 2rem;
}
.service-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 2rem;
  position: relative; transition: all .3s;
}
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-blue); border-color: var(--blue-500); }
.service-num {
  position: absolute; top: 1.5rem; right: 1.5rem;
  font-size: 3.5rem; font-weight: 900;
  color: rgba(59,130,246,.08); line-height: 1;
}
.service-icon { font-size: 2.5rem; margin-bottom: 1rem; display: block; }
.service-card h3 { font-size: 1.2rem; font-weight: 700; color: var(--blue-200); margin-bottom: 1rem; }
.service-card > p { color: var(--text-dim); margin-bottom: 1.5rem; line-height: 1.6; }
.check-list-service { list-style: none; padding: 0; }
.check-list-service li {
  font-size: .9rem; color: var(--text-dim);
  padding: .4rem 0; padding-left: 1.5rem;
  position: relative;
}
.check-list-service li::before {
  content: '✓'; position: absolute; left: 0;
  color: var(--green); font-weight: 700;
}

/* Timeline */
.process-timeline { max-width: 900px; margin: 0 auto; padding: 2rem 0; }
.timeline-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 2rem;
  margin-bottom: 0; position: relative;
  padding-left: 80px;
}
.timeline-item.alternate { margin-left: 0; }
.timeline-marker {
  position: absolute; left: 1.5rem; top: 1.5rem;
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; color: #fff; font-size: 1.3rem;
  box-shadow: 0 0 20px rgba(59,130,246,.4);
}
.timeline-connector {
  height: 40px; background: linear-gradient(180deg, var(--blue-600), transparent);
  margin: -20px auto 0; width: 2px; opacity: .4;
}
.timeline-content h3 { font-size: 1.15rem; font-weight: 700; color: var(--blue-200); margin-bottom: .75rem; }
.timeline-content p { color: var(--text-dim); font-size: .95rem; margin-bottom: 1rem; font-weight: 600; }
.timeline-content ul { padding-left: 1.4em; color: var(--text-dim); font-size: .9rem; }

/* Benefits */
.benefits-section { padding: 5rem 0; background: var(--dark); }
.benefits-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 2rem;
}
.benefit-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 2rem;
  text-align: center; transition: all .3s;
}
.benefit-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-blue); }
.benefit-icon { font-size: 2.5rem; margin-bottom: 1rem; display: block; }
.benefit-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--blue-200); margin-bottom: .75rem; }
.benefit-card p { font-size: .9rem; color: var(--text-dim); line-height: 1.6; }

/* Pricing */
.pricing-section { padding: 5rem 0; }
.pricing-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 2rem; max-width: 1200px; margin: 0 auto;
}
.pricing-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 2.5rem;
  position: relative; transition: all .3s;
}
.pricing-card:hover { transform: translateY(-10px); }
.pricing-card.featured {
  border-color: var(--blue-500); box-shadow: 0 0 40px rgba(59,130,246,.25);
  transform: scale(1.05);
}
.pricing-badge {
  position: absolute; top: -12px; right: 20px;
  background: var(--glass); border: 1px solid var(--glass-border);
  color: var(--text-dim); padding: .25rem .75rem;
  border-radius: 20px; font-size: .75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .05em;
}
.pricing-badge.featured { background: var(--blue-600); border-color: var(--blue-500); color: #fff; }
.pricing-card h3 { font-size: 1.25rem; font-weight: 700; color: var(--blue-200); margin-bottom: 1.5rem; }
.pricing-price {
  display: flex; align-items: baseline; gap: .25rem;
  margin-bottom: 1rem; font-weight: 700;
}
.currency { color: var(--text-dim); font-size: .9rem; }
.amount { font-size: 2rem; color: var(--blue-100); }
.period { color: var(--text-dim); font-size: .9rem; }
.pricing-desc { color: var(--text-dim); margin-bottom: 1.5rem; font-size: .9rem; }
.pricing-features { list-style: none; padding: 0; margin-bottom: 2rem; }
.pricing-features li {
  padding: .5rem 0; color: var(--text-dim);
  font-size: .9rem; border-bottom: 1px solid rgba(59,130,246,.08);
}
.pricing-features li:last-child { border-bottom: none; }
.pricing-note {
  text-align: center; max-width: 600px; margin: 2rem auto;
  background: rgba(59,130,246,.08);
  border: 1px solid rgba(59,130,246,.2);
  border-radius: var(--radius); padding: 1.5rem;
  color: var(--text-dim); font-size: .9rem;
}

/* Testimonials */
.testimonials-section { padding: 5rem 0; background: linear-gradient(180deg, var(--dark-2), var(--dark)); }
.testimonials-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 2rem; max-width: 1200px; margin: 0 auto;
}
.testimonial-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 2rem;
  transition: all .3s;
}
.testimonial-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-blue); }
.rating { font-size: 1.2rem; margin-bottom: 1rem; }
.testimonial-text { color: var(--text); line-height: 1.7; margin-bottom: 1.5rem; font-size: .95rem; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 1rem; }
.author-avatar {
  width: 48px; height: 48px; background: rgba(59,130,246,.2);
  border-radius: 50%; display: flex; align-items: center;
  justify-content: center; font-size: 1.5rem; flex-shrink: 0;
}
.testimonial-author h4 { font-size: .95rem; font-weight: 700; color: var(--blue-200); margin-bottom: .2rem; }
.testimonial-author p { font-size: .8rem; color: var(--text-dim); }

/* CTA Section */
.cta-section {
  padding: 4rem 0; text-align: center;
}
.cta-content { max-width: 700px; margin: 0 auto; }
.cta-content h2 { font-size: 2rem; font-weight: 800; color: var(--blue-100); margin-bottom: 1rem; }
.cta-content p { color: var(--text-dim); margin-bottom: 2rem; font-size: 1.05rem; }
.cta-buttons {
  display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap;
}

/* Contact Section */
.contact-section { padding: 5rem 0; }
.contact-cta {
  text-align: center; max-width: 600px; margin: 0 auto;
  background: linear-gradient(135deg, rgba(59,130,246,.1), rgba(129,140,248,.05));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 4rem 2rem;
  transition: all .3s;
}
.contact-cta:hover { transform: translateY(-5px); box-shadow: var(--shadow-blue); }
.contact-cta h2 { font-size: 1.8rem; font-weight: 800; color: var(--blue-100); margin-bottom: 1rem; }
.contact-cta p { font-size: 1.05rem; color: var(--text-dim); margin-bottom: 2.5rem; }
.contact-cta .btn { display: inline-flex; }
.contact-cta .btn:hover { transform: translateY(-3px); }

/* Mobile Responsiveness */
@media (max-width: 1100px) {
  .services-grid { grid-template-columns: repeat(2,1fr); }
  .benefits-grid { grid-template-columns: repeat(2,1fr); }
  .pricing-grid { grid-template-columns: repeat(2,1fr); }
  .testimonials-grid { grid-template-columns: repeat(2,1fr); }
  .pricing-card.featured { transform: scale(1); }
}

@media (max-width: 900px) {
  .services-grid { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .cta-buttons { flex-direction: column; }
  .cta-buttons a { width: 100%; }
}

@media (max-width: 600px) {
  .contact-item { flex-direction: column; }
  .contact-icon { font-size: 1.5rem; }
}

/* ── MOBILE ── */
@media (max-width: 1100px) {
  .tips-cards { grid-template-columns: repeat(3,1fr); }
  .conclusion-grid { grid-template-columns: repeat(3,1fr); }
  .artifact-type-grid { grid-template-columns: repeat(3,1fr); }
}
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: var(--dark-2);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem;
  }
  .intro-grid, .steps-layout, .two-panel, .browser-layout,
  .ai-work-grid, .feedback-layout, .custom-layout,
  .skills-layout, .security-layout { grid-template-columns: 1fr; gap: 2rem; }
  .examples-grid { grid-template-columns: 1fr; }
  .img-row, .extra-imgs-row { grid-template-columns: repeat(2,1fr); }
  .tips-cards { grid-template-columns: repeat(2,1fr); }
  .conclusion-grid { grid-template-columns: repeat(2,1fr); }
  .artifact-type-grid { grid-template-columns: repeat(2,1fr); }
  .qa-compare { grid-template-columns: 1fr; }
  .mode-cards { grid-template-columns: 1fr; }
  .artifacts-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .hero-title { font-size: 2rem; }
  .requirements-grid { grid-template-columns: 1fr; }
  .cap-grid { grid-template-columns: repeat(2,1fr); }
  .img-row, .extra-imgs-row { grid-template-columns: repeat(2,1fr); }
  .tips-cards { grid-template-columns: 1fr 1fr; }
  .conclusion-grid { grid-template-columns: 1fr 1fr; }
  .ns-grid { grid-template-columns: 1fr; }
  .shortcuts-grid { grid-template-columns: 1fr; }
  .scope-grid, .list-grid { grid-template-columns: 1fr; }
  .mode-table .mode-row { grid-template-columns: 1fr 1fr; }
  .mode-table .mode-row span:nth-child(2) { display: none; }
}