/* ==========================================
   AL TAIF EYE CENTER - BASE STYLES & LAYOUT
   ========================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg-light);
  color: var(--color-text-main);
  line-height: 1.6;
  overflow-x: hidden;
  text-align: start;
}

/* Container & Typography Utils - Full Width Home vs Boxed Sub-Pages */
.container {
  width: 100%;
  margin-inline: auto;
  padding-inline: 1.5rem;
  transition: max-width var(--transition-normal);
}

/* Home Page: Full Width Immersive Layout */
body[data-layout="fullwidth"] .container {
  max-width: 1680px;
  padding-inline: clamp(1.25rem, 4vw, 3.5rem);
}

/* Inner Sub-Pages: Clean Boxed Layout */
body[data-layout="boxed"] .container {
  max-width: 1200px;
  padding-inline: 1.5rem;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

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

/* Button & CTA Utilities */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding-block: 0.85rem;
  padding-inline: 1.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent-gradient);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 15px rgba(0, 198, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 198, 255, 0.5);
}

.btn-secondary {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  border: 1px solid rgba(19, 64, 116, 0.15);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Section Header Shared Paradigm */
.section-header {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
  margin-block-end: 3.5rem;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding-block: 0.4rem;
  padding-inline: 1rem;
  background: var(--color-primary-subtle);
  color: var(--color-primary-light);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-block-end: 1rem;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  margin-block-end: 1rem;
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: 1.125rem;
  line-height: 1.7;
}

/* Utility Top Bar */
.top-bar {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
  padding-block: 0.5rem;
  border-block-end: 1px solid rgba(255, 255, 255, 0.1);
}

.top-bar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.top-bar-info {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.top-bar-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.top-bar-item i {
  color: var(--color-accent);
}

.top-bar-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* Sticky Main Navigation */
.main-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  width: 100%;
  max-width: 1440px;
  gap: 0.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
  margin-inline-end: 0.5rem;
}

.brand-logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap !important;
}

.nav-menu li {
  flex-shrink: 0;
}

.nav-link {
  font-weight: 600;
  font-size: 0.88rem !important;
  color: var(--color-primary);
  padding-block: 0.4rem;
  padding-inline: 0.25rem;
  position: relative;
  white-space: nowrap !important;
  display: inline-flex;
  align-items: center;
  word-break: keep-all !important;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  inset-inline-start: 0;
  width: 0;
  height: 3px;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-full);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.lang-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding-block: 0.35rem;
  padding-inline: 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.lang-toggle-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: 0 0 10px rgba(0, 198, 255, 0.2);
}

.nav-controls .btn-primary {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  white-space: nowrap;
}

/* Mobile Navigation Toggle */
.mobile-menu-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--color-primary);
  cursor: pointer;
}

@media (max-width: 1199px) {
  .top-bar-info { display: none; }
  .mobile-menu-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    inset-inline-start: 0;
    width: 100%;
    background: var(--color-bg-light);
    flex-direction: column;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
}