/**
 * design-system.css
 * Design tokens, typography, layout primitives, and buttons
 * for Al Suwaiket Custom Website.
 *
 * Load order: reset.css → design-system.css → utilities.css → page CSS
 *
 * Font files expected at:
 *   assets/fonts/RoobertGX.ttf
 *   assets/fonts/RoobertTRIAL-Bold-BF67243fd540abb.ttf
 *   assets/fonts/GE_SS_Two_Light.ttf
 *   assets/fonts/GE_SS_Two_Medium.ttf
 *   assets/fonts/GE_SS_Two_Bold.ttf
 */

/* ========================================================================== */
/* @font-face — Roobert (English / LTR)                                       */
/* ========================================================================== */

@font-face {
  font-family: "Roobert";
  src: url("../fonts/RoobertGX.ttf") format("truetype");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Roobert";
  src: url("../fonts/RoobertTRIAL-Bold-BF67243fd540abb.ttf") format("truetype");
  font-weight: bold;
  font-style: normal;
  font-display: swap;
}

/* ========================================================================== */
/* @font-face — GE SS Two (Arabic / RTL + nav)                                */
/* ========================================================================== */

@font-face {
  font-family: "GE SS Two";
  src: url("../fonts/GE_SS_Two_Light.ttf") format("truetype");
  font-weight: 200;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "GE SS Two";
  src: url("../fonts/GE_SS_Two_Medium.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "GE SS Two";
  src: url("../fonts/GE_SS_Two_Medium.ttf") format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "GE SS Two";
  src: url("../fonts/GE_SS_Two_Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ========================================================================== */
/* Design tokens                                                              */
/* ========================================================================== */

:root {
  /* ---------- Brand colors ---------- */
  --color-primary: #215996;
  --color-primary-dark: #1a4678;
  --color-primary-light: #2e70b8;
  --color-secondary: #0f2f4f;
  --color-secondary-dark: #0a2038;
  --color-secondary-light: #1a456e;
  --color-accent: #3d8fd1;
  --color-accent-dark: #2f74ad;
  --color-accent-light: #6aade0;

  /* ---------- Neutrals ---------- */
  --color-white: #ffffff;
  --color-black: #0b0b0b;

  /* ---------- Gray scale ---------- */
  --color-gray-50: #f7f8fa;
  --color-gray-100: #eef1f5;
  --color-gray-200: #dde3ea;
  --color-gray-300: #c5ced9;
  --color-gray-400: #9aa7b5;
  --color-gray-500: #6f7d8c;
  --color-gray-600: #556170;
  --color-gray-700: #3f4954;
  --color-gray-800: #2a3139;
  --color-gray-900: #171b20;

  /* ---------- Borders ---------- */
  --color-border: #dde3ea;
  --color-border-strong: #c5ced9;
  --color-border-muted: #eef1f5;
  --color-border-focus: #215996;

  /* ---------- Semantic ---------- */
  --color-success: #1f7a4c;
  --color-success-bg: #e8f6ef;
  --color-warning: #b7791f;
  --color-warning-bg: #fdf6e7;
  --color-danger: #c0392b;
  --color-danger-bg: #fdecea;

  /* ---------- Text ---------- */
  --color-text: #2a3139;
  --color-text-muted: #6f7d8c;
  --color-text-inverse: #ffffff;
  --color-link: #215996;
  --color-link-hover: #1a4678;

  /* ---------- Surfaces ---------- */
  --color-bg: #ffffff;
  --color-bg-alt: #f7f8fa;
  --color-bg-muted: #eef1f5;
  --color-bg-inverse: #0f2f4f;

  /* ---------- Typography ---------- */
  --font-en: "Roobert", "Helvetica Neue", Arial, sans-serif;
  --font-ar: "GE SS Two", "Tahoma", "Arial", sans-serif;
  --font-family-base: var(--font-en);
  --font-family-heading: var(--font-en);
  --font-family-arabic: var(--font-ar);

  --font-weight-light: 200;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-md: 1.125rem;   /* 18px */
  --font-size-lg: 1.25rem;    /* 20px */
  --font-size-xl: 1.5rem;     /* 24px */
  --font-size-2xl: 1.875rem;  /* 30px */
  --font-size-3xl: 2.25rem;   /* 36px */
  --font-size-4xl: 2.75rem;   /* 44px */
  --font-size-5xl: 3.5rem;    /* 56px */
  --font-size-6xl: 4.25rem;   /* 68px */

  --line-height-none: 1;
  --line-height-tight: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.04em;

  /* ---------- Spacing scale (4px base) ---------- */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-7: 2rem;      /* 32px */
  --space-8: 2.5rem;    /* 40px */
  --space-9: 3rem;      /* 48px */
  --space-10: 4rem;     /* 64px */
  --space-11: 5rem;     /* 80px */
  --space-12: 6rem;     /* 96px */
  --space-13: 8rem;     /* 128px */

  /* ---------- Border radius ---------- */
  --radius-none: 0;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* ---------- Layout ---------- */
  --container-max: 1140px;
  --container-wide: 1320px;
  --container-narrow: 720px;
  --container-padding: var(--space-4);

  --header-height: 4.5rem;        /* 72px */
  --header-height-scrolled: 3.75rem; /* 60px */

  /* ---------- Breakpoints (reference; use in @media) ---------- */
  --bp-mobile: 0;
  --bp-tablet: 768px;
  --bp-desktop: 1024px;
  --bp-large: 1280px;

  /* ---------- Transitions ---------- */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-color: color 250ms ease, background-color 250ms ease, border-color 250ms ease;
  --transition-transform: transform 250ms ease;
  --transition-shadow: box-shadow 250ms ease;

  /* ---------- Shadows ---------- */
  --shadow-xs: 0 1px 2px rgba(15, 47, 79, 0.06);
  --shadow-sm: 0 2px 8px rgba(15, 47, 79, 0.08);
  --shadow-md: 0 6px 20px rgba(15, 47, 79, 0.1);
  --shadow-lg: 0 12px 40px rgba(15, 47, 79, 0.14);
  --shadow-xl: 0 20px 60px rgba(15, 47, 79, 0.18);
  --shadow-focus: 0 0 0 3px rgba(33, 89, 150, 0.35);

  /* ---------- Z-index scale ---------- */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-header: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-toast: 600;
  --z-max: 9999;
}

/* Arabic / RTL document: prefer GE SS Two as base */
html[lang="ar"],
html[dir="rtl"] {
  --font-family-base: var(--font-ar);
  --font-family-heading: var(--font-ar);
}

/* ========================================================================== */
/* Base element defaults (design-system layer)                                */
/* ========================================================================== */

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* ========================================================================== */
/* Typography utilities                                                       */
/* ========================================================================== */

.heading-1,
.h1 {
  font-family: var(--font-family-heading);
  font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-5xl));
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
}

.heading-2,
.h2 {
  font-family: var(--font-family-heading);
  font-size: clamp(var(--font-size-2xl), 3vw, var(--font-size-4xl));
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
}

.heading-3,
.h3 {
  font-family: var(--font-family-heading);
  font-size: clamp(var(--font-size-xl), 2.5vw, var(--font-size-3xl));
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-snug);
  color: var(--color-text);
}

.heading-4,
.h4 {
  font-family: var(--font-family-heading);
  font-size: clamp(var(--font-size-lg), 2vw, var(--font-size-2xl));
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-snug);
  color: var(--color-text);
}

.heading-5,
.h5 {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-snug);
  color: var(--color-text);
}

.heading-6,
.h6 {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-snug);
  color: var(--color-text);
}

.text-hero {
  font-family: var(--font-family-heading);
  font-size: clamp(var(--font-size-4xl), 5vw, var(--font-size-6xl));
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

.text-lead {
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
}

.text-body,
.paragraph {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
}

.text-body + .text-body,
.paragraph + .paragraph {
  margin-top: var(--space-4);
}

.text-small {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
}

.text-xs {
  font-size: var(--font-size-xs);
  line-height: var(--line-height-normal);
}

.text-muted {
  color: var(--color-text-muted);
}

.text-inverse {
  color: var(--color-text-inverse);
}

.text-uppercase {
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

/* Links */
.link,
a.link {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  transition: var(--transition-color);
}

.link:hover,
a.link:hover {
  color: var(--color-link-hover);
}

.link-plain,
a.link-plain {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-color);
}

.link-plain:hover,
a.link-plain:hover {
  color: var(--color-primary);
}

/* Lists */
.list {
  padding-inline-start: 1.25em;
  list-style: disc;
}

.list-ordered {
  padding-inline-start: 1.25em;
  list-style: decimal;
}

.list li + li,
.list-ordered li + li {
  margin-top: var(--space-2);
}

.list-check {
  list-style: none;
  padding-inline-start: 0;
}

.list-check li {
  position: relative;
  padding-inline-start: 1.5em;
}

.list-check li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 0.45em;
  width: 0.55em;
  height: 0.55em;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
}

.list-inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
}

/* Font family helpers */
.font-en {
  font-family: var(--font-en);
}

.font-ar {
  font-family: var(--font-ar);
}

.font-light {
  font-weight: var(--font-weight-light);
}

.font-regular {
  font-weight: var(--font-weight-regular);
}

.font-medium {
  font-weight: var(--font-weight-medium);
}

.font-semibold {
  font-weight: var(--font-weight-semibold);
}

.font-bold {
  font-weight: var(--font-weight-bold);
}

/* ========================================================================== */
/* Layout — container                                                         */
/* ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container--wide {
  max-width: var(--container-wide);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.container--full {
  max-width: none;
}

@media (min-width: 768px) {
  :root {
    --container-padding: var(--space-6);
  }
}

@media (min-width: 1024px) {
  :root {
    --container-padding: var(--space-7);
  }
}

/* ========================================================================== */
/* Layout — section                                                           */
/* ========================================================================== */

.section {
  padding-block: var(--space-10);
}

.section--sm {
  padding-block: var(--space-7);
}

.section--lg {
  padding-block: var(--space-12);
}

.section--flush {
  padding-block: 0;
}

@media (min-width: 1024px) {
  .section {
    padding-block: var(--space-12);
  }

  .section--lg {
    padding-block: var(--space-13);
  }
}

/* ========================================================================== */
/* Layout — grid                                                              */
/* ========================================================================== */

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.grid-3 {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.grid-4 {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.grid-auto {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ========================================================================== */
/* Layout — flex                                                              */
/* ========================================================================== */

.flex {
  display: flex;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.flex-nowrap {
  flex-wrap: nowrap;
}

.flex-1 {
  flex: 1 1 0%;
}

.flex-auto {
  flex: 1 1 auto;
}

.flex-none {
  flex: none;
}

.items-start {
  align-items: flex-start;
}

.items-center {
  align-items: center;
}

.items-end {
  align-items: flex-end;
}

.items-stretch {
  align-items: stretch;
}

.justify-start {
  justify-content: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-end {
  justify-content: flex-end;
}

.justify-between {
  justify-content: space-between;
}

.justify-around {
  justify-content: space-around;
}

/* ========================================================================== */
/* Gap                                                                        */
/* ========================================================================== */

.gap-0 { gap: var(--space-0); }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.gap-7 { gap: var(--space-7); }
.gap-8 { gap: var(--space-8); }
.gap-9 { gap: var(--space-9); }
.gap-10 { gap: var(--space-10); }

.gap-x-4 { column-gap: var(--space-4); }
.gap-x-6 { column-gap: var(--space-6); }
.gap-y-4 { row-gap: var(--space-4); }
.gap-y-6 { row-gap: var(--space-6); }

/* ========================================================================== */
/* Buttons                                                                    */
/* ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 2.75rem;
  padding: 0.75rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-family-base);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition-color), var(--transition-transform), var(--transition-shadow);
  user-select: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn:disabled,
.btn.is-disabled {
  opacity: 0.55;
  pointer-events: none;
}

.btn--sm {
  min-height: 2.25rem;
  padding: 0.5rem 1rem;
  font-size: var(--font-size-xs);
}

.btn--lg {
  min-height: 3.25rem;
  padding: 0.9rem 2rem;
  font-size: var(--font-size-base);
}

.btn--block {
  display: flex;
  width: 100%;
}

/* Primary */
.btn--primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
}

/* Secondary */
.btn--secondary {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-white);
}

.btn--secondary:hover {
  background-color: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
  color: var(--color-white);
}

/* Outline */
.btn--outline {
  background-color: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--outline:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.btn--outline-light {
  background-color: transparent;
  border-color: var(--color-white);
  color: var(--color-white);
}

.btn--outline-light:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
}

/* Text button */
.btn--text {
  min-height: auto;
  padding: 0.25rem 0;
  background-color: transparent;
  border-color: transparent;
  color: var(--color-primary);
  border-radius: 0;
}

.btn--text:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.btn--text:active {
  transform: none;
}

/* ========================================================================== */
/* Responsive breakpoint reference                                            */
/*                                                                            */
/* Mobile:        default (< 768px)                                           */
/* Tablet:        min-width: 768px                                            */
/* Desktop:       min-width: 1024px                                           */
/* Large desktop: min-width: 1280px                                           */
/* ========================================================================== */

@media (min-width: 768px) {
  /* Tablet and up — reserved for component overrides */
}

@media (min-width: 1024px) {
  /* Desktop and up */
}

@media (min-width: 1280px) {
  /* Large desktop and up */
  :root {
    --header-height: 5rem;
  }
}