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

/* ══ Theme Tokens ══ */
:root {
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Geist Mono', 'SF Mono', monospace;
  --font-ar: 'IBM Plex Sans Arabic', 'Outfit', sans-serif;
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;
  --accent: #3b82f6;
  --accent-dim: rgba(59, 130, 246, 0.12);
  --accent-hover: #60a5fa;
  --accent-border: rgba(59, 130, 246, 0.25);
}

[data-theme="dark"] {
  --bg-primary: #0a0a0c;
  --bg-secondary: #111114;
  --bg-tertiary: #18181c;
  --bg-hover: #1e1e24;
  --bg-active: #252530;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-medium: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text-primary: #ededef;
  --text-secondary: #9898a0;
  --text-tertiary: #5e5e68;
  --shadow-dropdown: 0 12px 40px rgba(0, 0, 0, 0.5);
  --header-bg: rgba(10, 10, 12, 0.82);
  --paper: #f5f3ec;
  --paper-ink: #1c1b17;
}

[data-theme="light"] {
  --bg-primary: #f8f8fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f0f0f4;
  --bg-hover: #e8e8ee;
  --bg-active: #dcdce4;
  --border-subtle: rgba(0, 0, 0, 0.06);
  --border-medium: rgba(0, 0, 0, 0.1);
  --border-strong: rgba(0, 0, 0, 0.16);
  --text-primary: #111118;
  --text-secondary: #555560;
  --text-tertiary: #8888a0;
  --shadow-dropdown: 0 12px 40px rgba(0, 0, 0, 0.12);
  --header-bg: rgba(248, 248, 250, 0.82);
  --paper: #ffffff;
  --paper-ink: #1c1b17;
}

/* ══ RTL base ══ */
[dir="rtl"] { font-family: var(--font-ar); }
[dir="rtl"] .font-mono { font-family: var(--font-mono); direction: ltr; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100dvh;
  transition: background var(--transition-base), color var(--transition-base);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-medium); border-radius: 99px; }

.page-container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ══ Header ══ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  height: 64px; display: flex; align-items: center;
  transition: background var(--transition-base);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px;
}
.site-title { font-weight: 600; font-size: 15px; letter-spacing: -0.3px; color: var(--text-primary); }
.site-title span { color: var(--text-tertiary); font-weight: 400; }

.header-controls { display: flex; align-items: center; gap: 6px; }

.header-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 34px; padding: 0 12px; background: var(--bg-secondary); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm); color: var(--text-secondary); font-family: var(--font-sans);
  font-size: 13px; cursor: pointer; transition: all var(--transition-fast); white-space: nowrap;
  text-decoration: none;
}
.header-btn:hover { border-color: var(--border-medium); color: var(--text-primary); background: var(--bg-tertiary); }
.header-btn.active { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.header-btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.header-btn.icon-only { padding: 0; width: 34px; }

.lang-selector { position: relative; }
.lang-dropdown {
  position: absolute; top: calc(100% + 6px); right: 0; min-width: 160px;
  background: var(--bg-tertiary); border: 1px solid var(--border-medium); border-radius: var(--radius-md);
  box-shadow: var(--shadow-dropdown); padding: 4px; z-index: 60; display: none;
}
[dir="rtl"] .lang-dropdown { right: auto; left: 0; }
.lang-dropdown.open { display: block; }
.lang-option {
  display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: var(--radius-sm);
  font-size: 13px; color: var(--text-secondary); cursor: pointer; border: none;
  background: none; width: 100%; text-align: left; font-family: var(--font-sans);
  transition: all var(--transition-fast);
}
[dir="rtl"] .lang-option { text-align: right; font-family: var(--font-ar); }
.lang-option:hover { background: var(--bg-hover); color: var(--text-primary); }
.lang-option.active { background: var(--accent-dim); color: var(--accent); }

/* ══ Footer ══ */
.site-footer { padding: 28px 0; border-top: 1px solid var(--border-subtle); margin-top: 40px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--text-tertiary); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

@media (max-width: 768px) {
  .header-btn .btn-label { display: none; }
  .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
}