/* ═══════════════════════════════════════════
   PIXELATED BLACK & WHITE
   ═══════════════════════════════════════════ */

:root {
  --bg: #000000;
  --bg2: #0a0a0a;
  --bg3: #111111;
  --surface: #1a1a1a;
  --surface2: #222222;
  --border: #333333;
  --border2: #444444;
  --text: #ffffff;
  --text2: #cccccc;
  --text3: #888888;
  --text4: #555555;
  --accent: #ffffff;
  --green: #00ff88;
  --red: #ff4444;
  --yellow: #ffcc00;
  --blue: #44aaff;
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Courier New', 'Consolas', 'Monaco', monospace;
  image-rendering: pixelated;
}

body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  -webkit-font-smoothing: none;
  -moz-osx-font-smoothing: unset;
}

::selection { background: var(--text); color: var(--bg); }

/* Pixel scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 0; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ─── Pixel Border Utility ─── */
.pixel-border {
  border: 3px solid var(--border);
  box-shadow:
    3px 3px 0 var(--border2),
    inset 3px 3px 0 rgba(255,255,255,0.03);
}

.pixel-border-thin {
  border: 2px solid var(--border);
  box-shadow: 2px 2px 0 var(--border);
}

/* ─── Navbar ─── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: var(--bg);
  border-bottom: 3px solid var(--border);
  padding: 0 2rem;
  height: 56px;
  display: flex; align-items: center; justify-content: space-between;
}

.navbar-brand {
  font-weight: 900;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  display: flex; align-items: center; gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.navbar-brand .pixel-icon {
  display: inline-block;
  width: 20px; height: 20px;
  background: var(--text);
  position: relative;
}

.navbar-brand .pixel-icon::after {
  content: '';
  position: absolute;
  top: 4px; left: 4px;
  width: 8px; height: 8px;
  background: var(--bg);
}

.navbar-right { display: flex; align-items: center; gap: 1rem; }

/* ─── Lang Toggle Pixel ─── */
.lang-toggle {
  display: flex;
  border: 2px solid var(--border);
}

.lang-toggle button {
  background: var(--bg);
  border: none;
  border-right: 2px solid var(--border);
  color: var(--text3);
  padding: 6px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: none;
  font-family: inherit;
  text-transform: uppercase;
}

.lang-toggle button:last-child { border-right: none; }
.lang-toggle button.active { background: var(--text); color: var(--bg); }
.lang-toggle button:hover:not(.active) { background: var(--surface); color: var(--text); }

/* ─── Hero ─── */
.hero {
  padding: 120px 2rem 60px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-pixel-frame {
  border: 4px solid var(--text);
  padding: 3rem 2rem;
  position: relative;
  margin-bottom: 2rem;
}

.hero-pixel-frame::before {
  content: '';
  position: absolute;
  top: -8px; left: -8px;
  right: -8px; bottom: -8px;
  border: 2px solid var(--border);
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text2);
  max-width: 600px;
  margin: 0 auto;
  line-height: 2;
}

.hero-char {
  display: inline-block;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ─── Pixel Divider ─── */
.pixel-divider {
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--border) 0px,
    var(--border) 8px,
    transparent 8px,
    transparent 16px
  );
  margin: 3rem 0;
  border: none;
}

.pixel-divider-solid {
  height: 3px;
  background: var(--border);
  margin: 2rem 0;
  border: none;
}

/* ─── Section ─── */
.section {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section-title::before {
  content: '>';
  color: var(--green);
}

.section-subtitle {
  color: var(--text3);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

/* ─── Platform Cards Pixel ─── */
.platform-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

@media (max-width: 640px) {
  .platform-grid { grid-template-columns: 1fr; }
}

.platform-card {
  background: var(--surface);
  border: 3px solid var(--border);
  padding: 1.5rem;
  cursor: pointer;
  transition: none;
  position: relative;
}

.platform-card:hover {
  background: var(--surface2);
  border-color: var(--text3);
}

.platform-card.active {
  border-color: var(--text);
  box-shadow: 4px 4px 0 var(--text);
}

.platform-card.active::after {
  content: '▶';
  position: absolute;
  top: 1rem; right: 1rem;
  color: var(--green);
  font-size: 0.8rem;
}

.platform-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.platform-card-icon {
  width: 32px;
  height: 32px;
  background: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.75rem;
  color: var(--bg);
}

.platform-card h3 {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.platform-card p {
  color: var(--text3);
  font-size: 0.85rem;
}

/* ─── Steps ─── */
.step {
  position: relative;
  padding: 0 0 3.5rem 3rem;
  border-left: 3px solid var(--border);
  margin-left: 0.5rem;
}

.step:last-child { border-left-color: transparent; padding-bottom: 0; }

.step-number {
  position: absolute;
  left: -1.15rem; top: 0;
  width: 28px; height: 28px;
  background: var(--bg);
  border: 3px solid var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 900;
  color: var(--text);
}

.step h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.step p {
  color: var(--text2);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

/* ─── Code Block Pixel ─── */
.code-block {
  background: var(--bg2);
  border: 3px solid var(--border);
  margin: 1rem 0;
  position: relative;
}

.code-block::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--surface2);
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--surface);
  border-bottom: 2px solid var(--border);
}

.code-block-lang {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.code-block-copy {
  background: var(--surface2);
  border: 2px solid var(--border);
  color: var(--text2);
  cursor: pointer;
  font-size: 0.75rem;
  padding: 4px 10px;
  transition: none;
  font-family: inherit;
  font-weight: 700;
  text-transform: uppercase;
}

.code-block-copy:hover {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.code-block pre {
  padding: 16px;
  overflow-x: auto;
  font-family: 'Courier New', 'Consolas', monospace;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text);
  white-space: pre;
  tab-size: 4;
}

.code-block code {
  font-family: inherit;
  white-space: pre;
  direction: ltr;
  text-align: left;
  display: block;
}

/* ─── Notes Pixel ─── */
.note {
  padding: 12px 16px;
  margin: 1rem 0;
  font-size: 0.9rem;
  line-height: 1.7;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  border: 2px solid;
}

.note-icon { flex-shrink: 0; font-size: 1rem; }

.note-info {
  background: rgba(68, 170, 255, 0.05);
  border-color: var(--blue);
  color: var(--blue);
}

.note-success {
  background: rgba(0, 255, 136, 0.05);
  border-color: var(--green);
  color: var(--green);
}

.note-warning {
  background: rgba(255, 204, 0, 0.05);
  border-color: var(--yellow);
  color: var(--yellow);
}

.note-danger {
  background: rgba(255, 68, 68, 0.05);
  border-color: var(--red);
  color: var(--red);
}

/* ─── Table ─── */
.pixel-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  border: 3px solid var(--border);
}

.pixel-table th,
.pixel-table td {
  padding: 10px 16px;
  border: 2px solid var(--border);
  text-align: left;
  font-size: 0.9rem;
}

.pixel-table th {
  background: var(--surface);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.pixel-table td {
  background: var(--bg2);
  color: var(--text2);
}

/* ─── Buttons Pixel ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 10px 24px;
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  transition: none;
  cursor: pointer;
  border: 3px solid;
  font-family: inherit;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.btn-primary:hover {
  background: var(--bg);
  color: var(--text);
  box-shadow: 3px 3px 0 var(--text);
}

.btn-secondary {
  background: var(--bg);
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--surface);
  border-color: var(--text);
}

/* ─── Contact / Footer ─── */
.footer {
  border-top: 3px solid var(--border);
  padding: 3rem 2rem;
  text-align: center;
}

.contact-box {
  border: 3px solid var(--text);
  padding: 2rem;
  max-width: 500px;
  margin: 0 auto 2rem;
  position: relative;
}

.contact-box::before {
  content: '';
  position: absolute;
  top: -6px; left: -6px;
  right: -6px; bottom: -6px;
  border: 2px solid var(--border);
  pointer-events: none;
}

.contact-title {
  font-size: 1.2rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 700;
  padding: 8px 16px;
  border: 2px solid var(--text);
  transition: none;
}

.contact-link:hover {
  background: var(--text);
  color: var(--bg);
}

.footer-credits {
  color: var(--text4);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .navbar { padding: 0 1rem; }
  .hero { padding: 100px 1rem 40px; }
  .hero-pixel-frame { padding: 2rem 1rem; }
  .section { padding: 3rem 1rem; }
  .step { padding-left: 2.5rem; }
}

/* ─── RTL ─── */
[dir="rtl"] .code-block pre,
[dir="rtl"] .code-block code {
  text-align: left !important;
  direction: ltr !important;
}

/* ─── Pixel art decorations ─── */
.pixel-dots {
  display: flex;
  gap: 4px;
  align-items: center;
}

.pixel-dot {
  width: 8px;
  height: 8px;
  background: var(--border);
  display: inline-block;
}

.pixel-dot.active { background: var(--text); }

/* ─── Accordion ─── */
.accordion-toggle {
  cursor: pointer;
}

.accordion-toggle::after {
  content: ' [+]';
  color: var(--text3);
  font-size: 0.8rem;
}

.accordion-toggle.open::after {
  content: ' [-]';
}

.accordion-content {
  display: none;
}

.accordion-content.open {
  display: block;
}