/* ══════════════════════════════════════════════════════════════
   FINISH MY WORK — LANDING PAGE DESIGN SYSTEM (NEO-BRUTALIST)
   Frozen palette, 3px ink borders, hard unblurred offset shadows,
   square corners, system fonts, zero external network requests.
   ══════════════════════════════════════════════════════════════ */

:root {
  --ink: #0f172a;
  --paper: #fbfbfa;
  --card: #ffffff;
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --amber: #d97706;
  --red: #dc2626;
  --green: #10b981;
  --muted: #475569;
  --line-muted: #cbd5e1;
  --subtle-bg: #f1f5f9;
  --hover-subtle: #f8fafc;
  --dark-bg: #0b1120;

  --line: 3px solid var(--ink);
  --line-thin: 2px solid var(--ink);
  --shadow: 5px 5px 0px var(--ink);
  --shadow-lg: 8px 8px 0px var(--ink);
  --shadow-sm: 3px 3px 0px var(--ink);

  --font-display: "Arial Black", "Archivo Black", "Helvetica Neue", Impact, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

body {
  margin: 0;
  background: var(--paper);
  background-image: 
    linear-gradient(to right, rgba(15, 23, 42, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--ink);
  font: 500 17px/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, p, ul, ol {
  margin: 0;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--ink);
}

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: background-color 0.1s ease, color 0.1s ease;
}

a:hover {
  background-color: var(--subtle-bg);
}

:focus-visible {
  outline: 4px solid var(--blue);
  outline-offset: 3px;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  font-weight: 700;
  background: #ffffff;
  border: 1.5px solid var(--ink);
  padding: 1px 6px;
}

/* ── Container ── */
.wrap {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Skip Link ── */
.skip-link {
  position: absolute;
  top: -60px;
  left: 20px;
  background: var(--blue);
  color: #ffffff;
  padding: 10px 16px;
  border: var(--line);
  font-family: var(--font-display);
  font-size: 14px;
  z-index: 1000;
  text-decoration: none;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 16px;
}

/* ── Navigation ── */
.site-nav {
  border-bottom: var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.brand-dash {
  color: var(--blue);
  font-weight: 900;
  font-size: 24px;
  line-height: 1;
}

.brand-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  text-decoration: none;
  padding: 4px 6px;
}

.nav-link:hover {
  background: var(--subtle-bg);
}

.nav-btn {
  background: var(--blue);
  color: #ffffff;
  border: var(--line);
  box-shadow: var(--shadow-sm);
  padding: 8px 16px;
  font-family: var(--font-display);
  font-size: 12.5px;
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: transform 0.07s ease, box-shadow 0.07s ease;
}

.nav-btn:hover {
  background: var(--blue-dark);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0px var(--ink);
}

.nav-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 0px 0px 0px var(--ink);
}

/* ── Buttons (Tactile Neo-Brutalist) ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 22px;
  border: var(--line);
  font-family: var(--font-display);
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: transform 0.07s ease, box-shadow 0.07s ease, background-color 0.1s ease;
}

.btn-primary {
  background: var(--blue);
  color: #ffffff;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  background: var(--blue-dark);
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0px var(--ink);
}

.btn-primary:active {
  transform: translate(4px, 4px);
  box-shadow: 0px 0px 0px var(--ink);
}

.btn-secondary {
  background: var(--card);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.btn-secondary:hover {
  background: var(--hover-subtle);
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0px var(--ink);
}

.btn-secondary:active {
  transform: translate(4px, 4px);
  box-shadow: 0px 0px 0px var(--ink);
}

/* ── Hero Section ── */
.hero-section {
  padding: 64px 0 72px 0;
  border-bottom: var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-tag {
  display: inline-block;
  background: var(--ink);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 56px;
  line-height: 1.02;
  margin-bottom: 24px;
}

.hero-lead {
  font-size: 19px;
  line-height: 1.55;
  color: var(--muted);
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 24px;
}

.hero-note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

/* ── Interactive Simulator Card ── */
.interactive-card {
  background: var(--card);
  border: var(--line);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sim-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 12px;
}

.sim-subject {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.sim-badge {
  background: var(--subtle-bg);
  border: 1.5px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  padding: 2px 6px;
}

.sim-question {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.sim-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sim-opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 2px solid var(--ink);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 13.5px;
  cursor: pointer;
  transition: all 0.1s ease;
}

.sim-opt:hover {
  background: var(--subtle-bg);
}

.sim-opt.correct-choice {
  background: #dcfce7 !important;
  border-color: #15803d !important;
  color: #15803d !important;
  font-weight: 800 !important;
}

.sim-radio {
  width: 14px;
  height: 14px;
  border: 2px solid var(--ink);
  background: #ffffff;
  flex-shrink: 0;
}

.sim-opt.correct-choice .sim-radio {
  background: #15803d;
}

.sim-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 2px solid var(--ink);
  padding-top: 14px;
}

.sim-solve-btn {
  width: 100%;
  background: var(--blue);
  color: #ffffff;
  border: var(--line);
  box-shadow: var(--shadow-sm);
  padding: 12px;
  font-family: var(--font-display);
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.07s ease, box-shadow 0.07s ease;
}

.sim-solve-btn:hover {
  background: var(--blue-dark);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0px var(--ink);
}

.sim-solve-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 0px 0px 0px var(--ink);
}

.sim-status-box {
  background: var(--subtle-bg);
  border: 1.5px solid var(--ink);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
}

.sim-status-dot {
  width: 8px;
  height: 8px;
  background: var(--green);
  border: 1px solid var(--ink);
  flex-shrink: 0;
}

.sim-status-dot.spinning {
  background: transparent;
  border: 2px solid rgba(37, 99, 235, 0.4);
  border-top-color: var(--blue);
  animation: sim-spin 0.6s linear infinite;
}

@keyframes sim-spin {
  to { transform: rotate(360deg); }
}

/* ── Section Titles ── */
.section {
  padding: 72px 0;
  border-bottom: var(--line);
}

.section-head {
  margin-bottom: 40px;
}

.section-tag {
  display: inline-block;
  background: var(--subtle-bg);
  border: 2px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  margin-bottom: 14px;
}

.section-title {
  font-size: 40px;
  line-height: 1.1;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 18px;
  color: var(--muted);
  max-width: 620px;
}

/* ── Bento Grid ── */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.bento-card {
  background: var(--card);
  border: var(--line);
  box-shadow: var(--shadow);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}

.bento-span-8 {
  grid-column: span 8;
}

.bento-span-4 {
  grid-column: span 4;
}

.bento-span-6 {
  grid-column: span 6;
}

.bento-span-12 {
  grid-column: span 12;
}

.bento-card-amber {
  background: #fffbeb;
  border-left: 8px solid var(--amber);
}

.bento-card-blue {
  background: #eff6ff;
  border-left: 8px solid var(--blue);
}

.bento-card-dark {
  background: var(--dark-bg);
  color: #f8fafc;
}

.bento-card-dark h3, .bento-card-dark p {
  color: #f8fafc;
}

.bento-card-dark code {
  background: #1e293b;
  color: #f8fafc;
  border-color: #334155;
}

.bento-badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  background: var(--ink);
  color: #ffffff;
  padding: 3px 8px;
  letter-spacing: 0.05em;
}

.bento-card-dark .bento-badge {
  background: var(--blue);
  color: #ffffff;
}

.bento-card h3 {
  font-size: 24px;
  line-height: 1.15;
}

.bento-card p {
  font-size: 15.5px;
  color: var(--muted);
  line-height: 1.5;
}

.mode-pills {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 10px;
}

.mode-pill-item {
  border: 2px solid var(--ink);
  background: #ffffff;
  padding: 10px 12px;
}

.mode-pill-title {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--ink);
  margin-bottom: 2px;
}

.mode-pill-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

/* ── Installation Section ── */
.install-section {
  background: var(--dark-bg);
  color: #f8fafc;
}

.install-section h2, .install-section h3, .install-section p {
  color: #f8fafc;
}

.install-steps-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: start;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-row {
  display: flex;
  gap: 16px;
  background: #131c31;
  border: 2px solid #334155;
  padding: 16px 20px;
}

.step-num {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--blue);
  line-height: 1;
}

.step-content h4 {
  font-family: var(--font-display);
  font-size: 16px;
  color: #f8fafc;
  margin-bottom: 4px;
}

.step-content p {
  font-size: 14px;
  color: #94a3b8;
  line-height: 1.45;
}

.terminal-box {
  background: #000000;
  border: 2.5px solid #334155;
  box-shadow: 6px 6px 0px #000000;
}

.terminal-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: #1e293b;
  border-bottom: 2px solid #334155;
}

.terminal-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  color: #94a3b8;
}

.btn-copy {
  background: var(--blue);
  color: #ffffff;
  border: 1.5px solid #334155;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.07s ease;
}

.btn-copy:hover {
  background: var(--blue-dark);
}

.terminal-code {
  padding: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: #38bdf8;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
}

.terminal-code .comment {
  color: #64748b;
}

/* ── FAQ Section ── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 860px;
}

.faq-item {
  border: var(--line);
  background: var(--card);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  font-family: var(--font-display);
  font-size: 18px;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--ink);
}

.faq-question:hover {
  background: var(--subtle-bg);
}

.faq-icon {
  font-size: 22px;
  line-height: 1;
  font-weight: 900;
  margin-left: 12px;
}

.faq-answer {
  display: none;
  padding: 0 22px 20px 22px;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1.5px dashed var(--line-muted);
  padding-top: 14px;
}

.faq-item.open .faq-answer {
  display: block;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

/* ── Footer ── */
.site-footer {
  background: var(--paper);
  border-top: var(--line);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-link {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  text-decoration: none;
}

/* ── Responsive / 390px Mobile View ── */
@media (max-width: 860px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-title {
    font-size: 38px;
  }
  .bento-span-8, .bento-span-4, .bento-span-6 {
    grid-column: span 12;
  }
  .mode-pills {
    grid-template-columns: 1fr;
  }
  .install-steps-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
}