/* ============================================
   ROACH PI — Neo-Brutalist Design System
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --black: #000000;
  --white: #FFFFFF;
  --blue: #0000FF;
  --gray-light: #F5F5F5;
  --border: 6px solid var(--black);
  --border-thick: 8px solid var(--black);
  --shadow: 6px 6px 0 var(--black);
  --shadow-sm: 4px 4px 0 var(--black);
  --shadow-lg: 8px 8px 0 var(--black);
  --font: 'MiSans', sans-serif;
  --max-width: 960px;
}

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

body {
  font-family: 'MiSans', 'Noto Sans KR', sans-serif;
  background-color: var(--white);
  color: var(--black);
  line-height: 1.7;
  min-height: 100vh;
}

/* --- MiSans Font Import --- */
/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.section {
  padding: 3rem 0;
  border-bottom: 3px solid var(--black);
}

.section:last-of-type {
  border-bottom: none;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 4px solid var(--black);
  display: inline-block;
}

h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--black);
  text-decoration: none;
  border-bottom: 3px solid var(--blue);
  transition: border-color 0.1s;
}

a:hover {
  border-bottom-color: var(--black);
}

strong {
  font-weight: 900;
}

/* --- Neo-Brutalist Components --- */

.card {
  background: var(--white);
  border: var(--border);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  transition: transform 0.1s, box-shadow 0.1s;
}

.card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.card-blue {
  border-color: var(--blue);
  box-shadow: 6px 6px 0 var(--blue);
}

.badge {
  display: inline-block;
  background: var(--black);
  color: var(--white);
  padding: 0.25rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 700;
  border: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn {
  display: inline-block;
  background: var(--black);
  color: var(--white);
  border: var(--border);
  box-shadow: var(--shadow-sm);
  padding: 0.75rem 1.5rem;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: transform 0.1s, box-shadow 0.1s;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow);
  border-bottom-color: var(--black);
}

.btn-blue {
  background: var(--blue);
  box-shadow: 4px 4px 0 var(--black);
}

.btn-blue:hover {
  box-shadow: 6px 6px 0 var(--black);
}

/* --- Code Blocks --- */
pre {
  background: var(--black);
  color: var(--white);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  border: var(--border);
  box-shadow: var(--shadow-sm);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 1rem 0;
}

code {
  font-family: 'Courier New', Courier, monospace;
}

p code, li code {
  background: var(--gray-light);
  border: 2px solid var(--black);
  padding: 0.1rem 0.4rem;
  font-size: 0.85em;
}

/* --- ASCII Icons --- */
.icon {
  font-family: monospace;
  font-size: 1.2em;
  margin-right: 0.5rem;
  display: inline-block;
}

/* --- Grid System --- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

/* --- Hero Section --- */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
  border-bottom: 4px solid var(--black);
}

.hero-ascii {
  font-family: 'Courier New', monospace;
  font-size: 0.7rem;
  line-height: 1.1;
  white-space: pre;
  display: inline-block;
  text-align: left;
  margin-bottom: 2rem;
  color: var(--black);
}

.hero-subtitle {
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: 2rem;
  color: var(--black);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-install {
  margin-top: 2rem;
}

/* --- Language Toggle --- */
.lang-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 100;
  display: flex;
  gap: 0;
  border: var(--border);
  box-shadow: var(--shadow-sm);
}

.lang-toggle button {
  background: var(--white);
  border: none;
  border-right: 3px solid var(--black);
  padding: 0.4rem 0.8rem;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  text-transform: uppercase;
  transition: background 0.1s;
}

.lang-toggle button:last-child {
  border-right: none;
}

.lang-toggle button.active {
  background: var(--black);
  color: var(--white);
}

.lang-toggle button:hover:not(.active) {
  background: var(--gray-light);
}

/* Language content switching */
[data-lang="ko"] {
  display: none;
}

body.lang-ko [data-lang="en"] {
  display: none;
}

body.lang-ko [data-lang="ko"] {
  display: block;
}

/* --- Feature Cards --- */
.feature-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: block;
}

.feature-title {
  font-weight: 900;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--black);
  line-height: 1.6;
}

/* --- FAQ Accordion --- */
details {
  border: var(--border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
  background: var(--white);
}

details[open] {
  box-shadow: var(--shadow);
}

summary {
  padding: 1rem 1.5rem;
  cursor: pointer;
  font-weight: 700;
  font-size: 1rem;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

summary::-webkit-details-marker {
  display: none;
}

summary::before {
  content: '▶';
  font-family: monospace;
  transition: transform 0.2s;
}

details[open] summary::before {
  transform: rotate(90deg);
}

details .faq-body {
  padding: 0 1.5rem 1.5rem;
  line-height: 1.7;
}

/* --- Step List (Quick Start) --- */
.step-list {
  list-style: none;
  counter-reset: step;
}

.step-list li {
  counter-increment: step;
  padding: 1.5rem;
  border: var(--border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  position: relative;
  padding-left: 4rem;
}

.step-list li::before {
  content: counter(step);
  position: absolute;
  left: -0.5rem;
  top: -0.5rem;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--black);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.2rem;
  border: 3px solid var(--black);
}

/* --- Navigation --- */
nav {
  position: sticky;
  top: 0;
  background: var(--white);
  border-bottom: var(--border-thick);
  z-index: 50;
  padding: 0.75rem 0;
}

nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  flex-wrap: wrap;
}

nav a {
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  border-bottom: none;
  padding: 0.25rem 0;
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--blue);
  transition: width 0.15s;
}

nav a:hover::after {
  width: 100%;
}

/* --- Footer --- */
footer {
  border-top: var(--border-thick);
  padding: 2rem 1.5rem;
  text-align: center;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  margin-top: 2rem;
}

footer a {
  border-bottom: 3px solid var(--blue);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --border: 4px solid var(--black);
    --border-thick: 6px solid var(--black);
    --shadow: 4px 4px 0 var(--black);
    --shadow-sm: 3px 3px 0 var(--black);
    --shadow-lg: 6px 6px 0 var(--black);
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 2.5rem 0 2rem;
  }

  .hero-ascii {
    font-size: 0.45rem;
  }

  nav ul {
    gap: 1rem;
  }

  nav a {
    font-size: 0.8rem;
  }

  .lang-toggle {
    position: static;
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .hero-ascii {
    font-size: 0.35rem;
  }

  .step-list li {
    padding-left: 3.5rem;
  }
}

/* --- Print --- */
@media print {
  .lang-toggle, nav {
    display: none;
  }

  .card, details {
    box-shadow: none;
    break-inside: avoid;
  }
}