/* ═══════════════════════════════════════
   CHARGEX — Base Stylesheet
   Shared across all pages
════════════════════════════════════════ */

:root {
  --black:   #050508;
  --dark:    #0a0a10;
  --card:    #0f0f18;
  --card2:   #13131e;
  --border:  rgba(255,255,255,0.07);
  --border2: rgba(255,255,255,0.12);
  --accent:  #00e5ff;
  --accent2: #7c3aed;
  --accent3: #f59e0b;
  --text:    #e8e8f0;
  --muted:   #7a7a90;
  --gradient: linear-gradient(135deg, #00e5ff 0%, #7c3aed 100%);
  --gradient-amber: linear-gradient(135deg, #f59e0b 0%, #7c3aed 100%);
  --glow-cyan:   0 0 40px rgba(0,229,255,0.25);
  --glow-purple: 0 0 40px rgba(124,58,237,0.25);
}

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

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

body {
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont,
               'Inter', 'Segoe UI', sans-serif;
  background: var(--black);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ── */
h1, h2, h3, h4 {
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

/* ── Gradient text ── */
.grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.grad-amber {
  background: var(--gradient-amber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Section Label ── */
.section-label {
  display: inline-block;
  font-size: 0.68rem; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(0,229,255,0.28);
  padding: 5px 14px; border-radius: 20px; margin-bottom: 24px;
}

/* ── Section Title ── */
.section-title {
  font-size: clamp(1.9rem, 3.8vw, 3rem);
  font-weight: 800; line-height: 1.12;
  letter-spacing: -0.025em; margin-bottom: 18px;
}

.section-sub {
  font-size: 1.05rem; color: var(--muted);
  line-height: 1.75; max-width: 620px;
}

/* ── Buttons ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 15px 30px; border-radius: 8px;
  background: var(--gradient); color: #000;
  font-weight: 800; font-size: 0.88rem;
  letter-spacing: 0.07em; text-transform: uppercase;
  border: none; cursor: pointer; text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 0 28px rgba(0,229,255,0.22);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 44px rgba(0,229,255,0.38);
}

.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 8px;
  background: transparent; color: var(--text);
  font-weight: 600; font-size: 0.88rem;
  letter-spacing: 0.07em; text-transform: uppercase;
  border: 1px solid var(--border2); cursor: pointer;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,229,255,0.05);
}

.btn-ghost {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--accent); font-size: 0.85rem; font-weight: 600;
  text-decoration: none; letter-spacing: 0.04em;
  transition: gap 0.2s, opacity 0.2s;
}
.btn-ghost:hover { gap: 10px; }

/* ── Card ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.card:hover {
  border-color: rgba(0,229,255,0.22);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
}

/* ── Divider ── */
.divider {
  width: 100%; height: 1px;
  background: var(--border);
  margin: 60px 0;
}

/* ── Scroll fade-up ── */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

.fade-up-d1 { transition-delay: 0.08s; }
.fade-up-d2 { transition-delay: 0.16s; }
.fade-up-d3 { transition-delay: 0.24s; }
.fade-up-d4 { transition-delay: 0.32s; }

/* ── Grid utils ── */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }

/* ── Tag badge ── */
.tag {
  display: inline-block;
  padding: 4px 12px; border-radius: 20px;
  font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase;
  font-weight: 600;
}
.tag-cyan  { background: rgba(0,229,255,0.1);  color: var(--accent); }
.tag-purple{ background: rgba(124,58,237,0.1); color: #a78bfa; }
.tag-amber { background: rgba(245,158,11,0.1); color: var(--accent3); }
.tag-red   { background: rgba(255,60,60,0.1);  color: #ff7070; }
.tag-green { background: rgba(34,197,94,0.1);  color: #4ade80; }

/* ── Language Switcher — vertical, right-side floating ── */
.lang-switcher {
  position: fixed !important;
  top: 50% !important;
  right: 0 !important;
  transform: translateY(-50%) !important;
  z-index: 99999 !important;
  display: flex;
  flex-direction: column;
  gap: 0;
  background: rgba(15, 15, 24, 0.92) !important;
  padding: 8px 10px;
  border-radius: 12px 0 0 12px;
  border: 1px solid var(--border);
  border-right: none;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  pointer-events: auto !important;
  opacity: 1 !important;
  visibility: visible !important;
}
.lang-switcher button {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 14px;
  border-radius: 6px;
  transition: all 0.3s;
  position: relative;
  z-index: 99999;
  white-space: nowrap;
  writing-mode: horizontal-tb;
}
.lang-switcher button.active {
  background: var(--gradient);
  color: #000;
}
.lang-switcher button:hover:not(.active) {
  color: var(--text);
}
.lang-switcher button + button {
  border-top: 1px solid var(--border);
  margin-top: 2px;
  padding-top: 6px;
}
@media (max-width: 768px) {
  .lang-switcher {
    padding: 6px 8px;
  }
  .lang-switcher button {
    font-size: 0.65rem;
    padding: 5px 10px;
  }
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section-title { font-size: 1.7rem; }
}