/* =================================================================
   Modern Blog — style.css
   Pure CSS. CSS variables for theming (dark/light), RTL mirroring,
   responsive grid via Flexbox + CSS Grid.
   ================================================================= */

/* ---------- 1. THEME TOKENS (LIGHT DEFAULT) ---------- */
:root {
  /* Color palette - Light */
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-surface-2: #f1f3f7;
  --color-text: #1a1d24;
  --color-text-muted: #5b6472;
  --color-border: #e3e6ec;
  --color-primary: #4f46e5;
  /* indigo */
  --color-primary-hover: #4338ca;
  --color-accent: #f59e0b;
  /* amber for Smartlink */
  --color-accent-hover: #d97706;
  --color-danger: #dc2626;

  /* Ad placeholder look */
  --ad-bg: #f4f5f7;
  --ad-border: #c9ced8;
  --ad-text: #8a93a3;

  /* Typography */
  --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-arabic: 'Cairo', 'Segoe UI', system-ui, sans-serif;
  --font-heading: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --fs-xs: 0.78rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.75rem;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;

  /* Radius & shadows */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 14px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
  --shadow-hover: 0 18px 40px rgba(79, 70, 229, 0.18);

  /* Layout */
  --container-width: 1200px;
  --navbar-height: 64px;
  --transition: 200ms ease;
}

/* ---------- 2. DARK MODE TOKENS ---------- */
[data-theme="dark"] {
  --color-bg: #0f1115;
  --color-surface: #181b22;
  --color-surface-2: #20242d;
  --color-text: #e7eaf0;
  --color-text-muted: #9aa3b2;
  --color-border: #2c313c;
  --color-primary: #818cf8;
  --color-primary-hover: #a5b4fc;
  --color-accent: #fbbf24;
  --color-accent-hover: #fcd34d;

  --ad-bg: #1b1f27;
  --ad-border: #353b47;
  --ad-text: #6b7280;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.6);
  --shadow-hover: 0 18px 40px rgba(129, 140, 248, 0.25);
}

/* ---------- 3. RESET / GLOBAL ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-size: var(--fs-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition), color var(--transition);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
}

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

/* ---------- 4. RTL SUPPORT ---------- */
[dir="rtl"] body {
  font-family: var(--font-arabic);
}

[dir="rtl"] .navbar {
  flex-direction: row-reverse;
}

[dir="rtl"] .nav-menu {
  margin-inline-start: 0;
  margin-inline-end: auto;
}

[dir="rtl"] .logo {
  flex-direction: row-reverse;
}

[dir="rtl"] .hero-cta,
[dir="rtl"] .blog-header,
[dir="rtl"] .footer-inner {
  text-align: right;
}

[dir="rtl"] .search-wrap {
  direction: rtl;
}

[dir="rtl"] .search-icon {
  left: var(--space-4);
  right: auto;
}

/* ---------- 5. UTILITY ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
  flex: 1 0 auto;
}

/* ---------- 6. NAVBAR ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.navbar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  min-height: var(--navbar-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--fs-lg);
  color: var(--color-text);
  margin-inline-end: auto;
}

.logo-mark {
  font-size: 1.4rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
}

.nav-link {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: var(--fs-sm);
  position: relative;
  padding: var(--space-2) 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

/* Language selector */
.lang-selector select {
  font-family: inherit;
  font-size: var(--fs-sm);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  font-size: 1.1rem;
  transition: background var(--transition), transform var(--transition);
}

.theme-toggle:hover {
  background: var(--color-surface-2);
  transform: rotate(15deg);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  padding: 0;
}

.hamburger .bar {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

.hamburger.active .bar:nth-child(1) {
  transform: translateY(9.5px) rotate(45deg);
}

.hamburger.active .bar:nth-child(2) {
  opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
  transform: translateY(-9.5px) rotate(-45deg);
}

/* ---------- 7. AD CONTAINERS ---------- */
.ad-container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-1);
  width: 100%;
  max-width: 100%;
  min-height: 90px;
  margin: var(--space-4) auto;
  padding: var(--space-4);
  background: var(--ad-bg);
  border: 2px dashed var(--ad-border);
  border-radius: var(--radius-md);
  color: var(--ad-text);
  text-align: center;
  font-size: var(--fs-xs);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  overflow: hidden;
}

.ad-top {
  max-width: 728px;
}

.ad-bottom {
  max-width: 970px;
  margin-bottom: var(--space-6);
}

.ad-label {
  font-weight: 600;
  opacity: 0.7;
}

/* ---------- 8. HERO ---------- */
.hero {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-2) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-10) var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-md);
  margin-bottom: var(--space-8);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, var(--fs-3xl));
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: var(--space-4);
  background: linear-gradient(120deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  color: var(--color-text-muted);
  font-size: var(--fs-lg);
  max-width: 640px;
  margin: 0 auto var(--space-6);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* ---------- 9. BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--fs-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition),
    background var(--transition), color var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-smartlink {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  color: #1a1d24;
  border-color: var(--color-accent);
}

.btn-smartlink:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(245, 158, 11, 0.4);
}

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

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

/* ---------- 10. BLOG SECTION ---------- */
.blog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.section-title {
  font-size: var(--fs-2xl);
  font-weight: 700;
  position: relative;
  padding-inline-start: var(--space-4);
}

.section-title::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 70%;
  background: linear-gradient(var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

.search-wrap {
  position: relative;
  min-width: 260px;
  flex: 1 1 260px;
  max-width: 360px;
}

.search-input {
  width: 100%;
  padding: var(--space-3) var(--space-4) var(--space-3) calc(var(--space-4) * 2.2);
  font-family: inherit;
  font-size: var(--fs-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.search-icon {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: 0.9rem;
  opacity: 0.6;
}

[dir="rtl"] .search-input {
  padding: var(--space-3) calc(var(--space-4) * 2.2) var(--space-3) var(--space-4);
}

/* ---------- 11. BLOG GRID & CARDS ---------- */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
  box-shadow: var(--shadow-sm);
}

.blog-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
}

.blog-card-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--color-surface-2);
}

.blog-card-body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}

.blog-card-category {
  align-self: flex-start;
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background: rgba(79, 70, 229, 0.1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

[data-theme="dark"] .blog-card-category {
  background: rgba(129, 140, 248, 0.15);
}

.blog-card-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-2);
}

.blog-card-excerpt {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-4);
  flex: 1 1 auto;
}

.blog-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-3);
  margin-top: auto;
}

.blog-card-meta .author::before {
  content: "✍️ ";
}

.blog-card-meta .date::before {
  content: "📅 ";
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 600;
  font-size: var(--fs-sm);
  color: var(--color-primary);
  margin-top: var(--space-3);
}

.read-more::after {
  content: "→";
  transition: transform var(--transition);
}

[dir="rtl"] .read-more::after {
  content: "←";
}

.read-more:hover::after {
  transform: translateX(4px);
}

[dir="rtl"] .read-more:hover::after {
  transform: translateX(-4px);
}

/* ---------- 12. NATIVE AD inside grid ---------- */
.native-ad {
  background: var(--ad-bg);
  border: 2px dashed var(--ad-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  color: var(--ad-text);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 200px;
}

.native-ad .ad-label {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.7;
}

.native-ad .ad-note {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* ---------- 13. NO RESULTS ---------- */
.no-results {
  text-align: center;
  padding: var(--space-10) var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--fs-lg);
}

/* ---------- 14. ARTICLE VIEW ---------- */
.article-view {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  box-shadow: var(--shadow-md);
  max-width: 820px;
  margin: 0 auto;
}

.article-view .article-category {
  align-self: flex-start;
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background: rgba(79, 70, 229, 0.1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
  display: inline-block;
}

.article-view h1 {
  font-size: clamp(1.5rem, 3vw, var(--fs-2xl));
  line-height: 1.25;
  margin-bottom: var(--space-3);
}

.article-view .article-meta {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-5);
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.article-view .article-cover {
  width: 100%;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.article-view .article-content {
  font-size: var(--fs-base);
  line-height: 1.8;
  color: var(--color-text);
}

.article-view .article-content p {
  margin-bottom: var(--space-4);
}

.back-to-home {
  margin-bottom: var(--space-5);
}

/* ---------- 15. FOOTER ---------- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-6) var(--space-4);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--fs-lg);
}

.social-links {
  display: flex;
  gap: var(--space-4);
  list-style: none;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-surface-2);
  font-size: 1.1rem;
  transition: transform var(--transition), background var(--transition);
}

.social-links a:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-3px);
}

.copyright {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* ============================================================
   16. RESPONSIVE BREAKPOINTS
   ============================================================ */

/* ---- MOBILE (default): 1 column, hamburger visible ---- */
@media (max-width: 767px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--navbar-height);
    inset-inline: 0;
    flex-direction: column;
    align-items: flex-start;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    gap: var(--space-3);
    transform: translateY(-150%);
    transition: transform var(--transition);
    box-shadow: var(--shadow-md);
    z-index: 999;
  }

  .nav-menu.active {
    transform: translateY(0);
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: var(--space-2) 0;
  }

  .hero {
    padding: var(--space-8) var(--space-4);
  }

  .blog-header {
    flex-direction: column;
    align-items: stretch;
  }

  .search-wrap {
    max-width: none;
  }
}

/* ---- TABLET (>=768px): 2 columns ---- */
@media (min-width: 768px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }

  .hero {
    padding: var(--space-10) var(--space-8);
  }
}

/* ---- DESKTOP (>=1024px): 3 columns, full nav ---- */
@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }

  .container {
    padding: var(--space-8) var(--space-6);
  }
}

/* ---- LARGE DESKTOP (>=1280px) ---- */
@media (min-width: 1280px) {
  .blog-grid {
    gap: var(--space-8);
  }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}