/* ============================================================
   MUSTAFA SOLVES — Archival Emerald Design System
   design-system.css
   Single source of truth for tokens, typography, layout base
   ============================================================ */

/* ── 1. Font Loading ── */
/*
   Latin  : Playfair Display (brand) + Newsreader (headline) + Plus Jakarta Sans (body/UI) — Google Fonts CDN
   Arabic : Alyamama variable font (300–900) — self-hosted woff2 (assets/fonts/)
            Single file covers all weights: Light/Regular/Medium/SemiBold/Bold/ExtraBold/Black
   Icons  : Material Symbols Outlined — Google Fonts CDN

   Arabic weight mapping:
     300  → Light      — captions, fine print
     400  → Regular    — body copy, long-form text
     500  → Medium     — UI labels, nav items
     600  → SemiBold   — buttons, tags, eyebrows
     700  → Bold       — section titles, card headers
     800  → ExtraBold  — hero headlines
     900  → Black      — display / oversized statements
*/

/* Alyamama — Variable font primary, static fallbacks */
@font-face {
  font-family: 'Alyamama';
  src: url('../fonts/Alyamama-VF.woff2') format('woff2 supports variations'),
       url('../fonts/Alyamama-VF.woff2') format('woff2');
  font-weight: 300 900;
  font-style: normal;
  font-display: swap;
}

/* Static fallbacks — for browsers without variable font support */
@font-face {
  font-family: 'Alyamama';
  src: url('../fonts/Alyamama-Light.woff2') format('woff2');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Alyamama';
  src: url('../fonts/Alyamama-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Alyamama';
  src: url('../fonts/Alyamama-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Alyamama';
  src: url('../fonts/Alyamama-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Alyamama';
  src: url('../fonts/Alyamama-ExtraBold.woff2') format('woff2');
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Alyamama';
  src: url('../fonts/Alyamama-Black.woff2') format('woff2');
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}

/* Google Fonts — Latin only (Amiri removed) */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,600;0,700;1,600&family=Newsreader:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=swap');

/* ── 2. CSS Custom Properties (Design Tokens) ── */
:root {
  /* --- Color Palette --- */
  --color-primary:                  #005440;
  --color-primary-container:        #0f6e56;
  --color-primary-fixed:            #a0f3d4;
  --color-primary-fixed-dim:        #84d6b9;
  --color-on-primary:               #ffffff;
  --color-on-primary-container:     #9aedcf;
  --color-on-primary-fixed:         #002117;
  --color-on-primary-fixed-variant: #00513e;
  --color-inverse-primary:          #84d6b9;
  --color-surface-tint:             #086b53;

  --color-secondary:                #5f5e63;
  --color-secondary-container:      #e4e1e7;
  --color-secondary-fixed:          #e4e1e7;
  --color-secondary-fixed-dim:      #c8c5cb;
  --color-on-secondary:             #ffffff;
  --color-on-secondary-container:   #656469;
  --color-on-secondary-fixed:       #1b1b1f;
  --color-on-secondary-fixed-variant:#47464b;

  --color-tertiary:                 #78352b;
  --color-tertiary-container:       #954c41;
  --color-tertiary-fixed:           #ffdad4;
  --color-tertiary-fixed-dim:       #ffb4a8;
  --color-on-tertiary:              #ffffff;
  --color-on-tertiary-container:    #ffd3cc;
  --color-on-tertiary-fixed:        #3b0804;
  --color-on-tertiary-fixed-variant:#743329;

  --color-background:               #fcf9f3;
  --color-surface:                  #fcf9f3;
  --color-surface-bright:           #fcf9f3;
  --color-surface-dim:              #dcdad4;
  --color-surface-variant:          #e5e2dc;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low:    #f6f3ed;
  --color-surface-container:        #f0eee8;
  --color-surface-container-high:   #ebe8e2;
  --color-surface-container-highest:#e5e2dc;
  --color-inverse-surface:          #31312d;
  --color-inverse-on-surface:       #f3f0ea;

  --color-on-background:            #1c1c18;
  --color-on-surface:               #1c1c18;
  --color-on-surface-variant:       #3f4944;

  --color-outline:                  #6f7a74;
  --color-outline-variant:          #bec9c3;

  --color-error:                    #ba1a1a;
  --color-error-container:          #ffdad6;
  --color-on-error:                 #ffffff;
  --color-on-error-container:       #93000a;

  /* --- Typography Families — Latin --- */
  --font-headline: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-brand:    'Playfair Display', Georgia, serif;
  --font-body:     'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-label:    'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* --- Typography Families — Arabic (Alyamama only) --- */
  /*
     واحد خط بأوزان مختلفة يغطي كل الأدوار:
     --font-arabic-brand → وزن 800 للعناوين الكبيرة والبراند (مقابل Playfair Display)
     --font-arabic-body  → وزن 400 للنصوص الطويلة والـ UI    (مقابل Plus Jakarta Sans)
     --font-arabic       → shorthand افتراضي (400)
  */
  --font-arabic-brand: 'Alyamama', 'Traditional Arabic', serif;
  --font-arabic-body:  'Alyamama', 'Arial Unicode MS', sans-serif;
  --font-arabic:       'Alyamama', 'Arial Unicode MS', sans-serif;

  /* --- Typographic Scale --- */
  --text-hero:     clamp(3.5rem, 9vw, 6rem);
  --text-display:  clamp(3rem, 6vw, 5.5rem);
  --text-h1:       3.5rem;
  --text-h2:       3rem;
  --text-h3:       1.75rem;
  --text-h4:       1.25rem;
  --text-body-lg:  1.25rem;
  --text-body:     1rem;
  --text-body-sm:  0.875rem;
  --text-label:    0.6875rem; /* 11px */
  --text-micro:    0.5625rem; /* 9px */

  /* --- Spacing Scale --- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;

  /* --- Layout --- */
  --max-width:      80rem;  /* 1280px */
  --nav-height:     5rem;
  --page-padding-x: clamp(1.5rem, 5vw, 2rem);

  /* --- Borders & Radius --- */
  --radius:         0px;    /* Sharp corners — Design System rule */
  --radius-pill:    9999px; /* Only for tags / social icons */
  --border-hairline: 1px solid rgba(190, 201, 195, 0.2); /* outline-variant @ 20% */
  --border-subtle:   1px solid rgba(190, 201, 195, 0.3);

  /* --- Elevation / Blur --- */
  --blur-nav:       blur(12px);
  --shadow-ambient: 0 8px 48px rgba(0, 84, 64, 0.04);

  /* --- Transitions --- */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   500ms ease;

  /* --- Dot Grid (Hero Texture) --- */
  --dot-grid-color:    rgba(190, 201, 195, 0.5);
  --dot-grid-size:     24px;
  --dot-grid-opacity:  0.1;
}

/* ── 3. Reset & Base ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.6;
  color: var(--color-on-surface);
  background-color: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

::selection {
  background-color: rgba(0, 84, 64, 0.1);
}

/* ── 4. Typography Utilities ── */

/* Latin */
.font-headline { font-family: var(--font-headline); }
.font-brand     { font-family: var(--font-brand); }
.font-body      { font-family: var(--font-body); }
.font-label     { font-family: var(--font-label); }

/* Arabic */
.font-arabic         { font-family: var(--font-arabic); }
.font-arabic-brand   { font-family: var(--font-arabic-brand); font-weight: 800; }
.font-arabic-body    { font-family: var(--font-arabic-body);  font-weight: 400; }

/* Eyebrow / Uppercase Label — used extensively */
.eyebrow {
  font-family: var(--font-label);
  font-size: var(--text-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4em;
  color: var(--color-primary);
  display: block;
}

/*
  Arabic text blocks — Alyamama only, weight defines role:
  .arabic-text     → weight 400  — body copy, UI text, long form
  .arabic-headline → weight 800  — hero headings, section titles, brand display
*/
.arabic-text {
  font-family: var(--font-arabic);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0;
}

.arabic-headline {
  font-family: var(--font-arabic-brand);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0;
}

[lang="ar"], .rtl {
  direction: rtl;
  text-align: right;
  font-family: var(--font-arabic);
}

/* ── 5. Material Icons Config ── */
.material-symbols-outlined {
  font-family: 'Material Symbols Outlined', sans-serif;
  font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24;
  font-style: normal;
  line-height: 1;
  display: inline-block;
  vertical-align: middle;
  user-select: none;
}

/* ── 6. Layout Primitives ── */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--page-padding-x);
}

.page-section {
  padding-block: var(--space-40);
  padding-inline: var(--page-padding-x);
}

/* ── 7. Textures ── */
.dot-grid {
  background-image: radial-gradient(circle, var(--dot-grid-color) 1px, transparent 1px);
  background-size: var(--dot-grid-size) var(--dot-grid-size);
  opacity: var(--dot-grid-opacity);
  pointer-events: none;
}

/* ── 8. Social Icon Helper ── */
.social-icon {
  width: 18px;
  height: 18px;
  fill: currentColor;
  display: block;
  flex-shrink: 0;
}

/* ── 9. Divider ── */
.divider {
  height: 1px;
  background-color: var(--color-outline-variant);
  opacity: 0.2;
  border: none;
}

/* ── 10. Scroll padding for fixed nav ── */
:target {
  scroll-margin-top: calc(var(--nav-height) + var(--space-8));
}