/**
 * typography.css - Dual Bilingual Typography Engine
 * Arabic (Cairo) & English (Plus Jakarta Sans / Inter) with JetBrains Mono for code & telemetry.
 */

:root {
  --font-arabic: 'Cairo', system-ui, -apple-system, sans-serif;
  --font-english: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  /* Default Font (dynamically set based on lang attribute) */
  --font-main: var(--font-arabic);

  /* Fluid Type Scale */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --font-size-sm: clamp(0.875rem, 0.825rem + 0.25vw, 0.9375rem);
  --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --font-size-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --font-size-2xl: clamp(1.35rem, 1.25rem + 0.5vw, 1.75rem);
  --font-size-3xl: clamp(1.6rem, 1.45rem + 0.75vw, 2.15rem);
  --font-size-4xl: clamp(1.85rem, 1.65rem + 1vw, 2.65rem);
  --font-size-5xl: clamp(2.2rem, 1.9rem + 1.5vw, 3.25rem);
  --font-size-display: clamp(2.35rem, 2rem + 1.5vw, 3.8rem);

  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;

  /* Weights */
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-black: 800;
}

/* LTR / English Font Setup */
html[lang="en"] {
  --font-main: var(--font-english);
}

html[lang="en"] body {
  letter-spacing: -0.015em;
}

html[lang="en"] .display-heading {
  letter-spacing: -0.04em;
}

/* RTL / Arabic Font Setup */
html[lang="ar"] {
  --font-main: var(--font-arabic);
}

html[lang="ar"] body {
  letter-spacing: 0;
  line-height: 1.65;
}

html[lang="ar"] .display-heading {
  letter-spacing: -0.01em;
  line-height: 1.25;
}

body {
  font-family: var(--font-main);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background-color: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Heading Utility Classes */
h1, h2, h3, h4, h5, h6 {
  font-family: inherit;
  color: var(--text-primary);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
}

.text-mono {
  font-family: var(--font-mono);
}

.text-gradient {
  background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* Shimmering Text Effect (Inspired by pszostak.pl) */
.text-shimmer {
  background: linear-gradient(
    110deg,
    #ffffff 0%,
    #ffffff 35%,
    var(--accent-hover) 48%,
    #a855f7 52%,
    #ffffff 65%,
    #ffffff 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: textShimmer 4s ease-in-out infinite;
  display: inline-block;
}

[data-theme="light"] .text-shimmer {
  background: linear-gradient(
    110deg,
    #0f172a 0%,
    #0f172a 35%,
    var(--accent) 50%,
    #0f172a 65%,
    #0f172a 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: textShimmer 4s ease-in-out infinite;
}

@keyframes textShimmer {
  0% {
    background-position: 100% 50%;
  }
  100% {
    background-position: -100% 50%;
  }
}