/* ==========================================
   AHMED ELSISY — COMPONENTS & UI SYSTEM
   ========================================== */

/* ========================================
   NAVIGATION
   ======================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.5rem 0;
  transition: all var(--transition-normal);
  background: transparent;
}

.site-header.scrolled {
  padding: 0.85rem 0;
  background: var(--color-dark-overlay);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.1rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-logo .dot {
  color: var(--color-accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  flex-wrap: nowrap;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: 0.25rem 0;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 1.5px;
  background-color: var(--color-accent);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

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

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

.nav-link.active {
  color: var(--color-text);
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.03);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.lang-switcher:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-subtle);
}

.lang-switcher span.active {
  color: var(--color-accent);
}

/* Mobile hamburger */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  height: 20px;
  justify-content: center;
  flex-shrink: 0;
  z-index: 1002;
}

.mobile-menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* Mobile overlay */
.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-background);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.mobile-nav-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-menu {
  list-style: none;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.mobile-nav-menu .nav-link {
  font-size: 1.65rem;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.01em;
}

[dir="rtl"] .mobile-nav-menu .nav-link {
  font-family: var(--font-arabic);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.8rem 1.65rem;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-text);
  color: var(--color-background);
  border: 1px solid var(--color-text);
}

.btn-primary:hover {
  background-color: var(--color-accent);
  color: var(--color-background);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.04);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.09);
  border-color: var(--color-border-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--color-accent);
  padding-inline: 0;
  border: none;
}

.btn-ghost:hover {
  color: var(--color-accent-hover);
}

.btn-arrow {
  transition: transform var(--transition-fast);
  display: inline-block;
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* RTL arrow handled in rtl.css */

/* ========================================
   IMAGE PLACEHOLDERS
   ======================================== */

.placeholder-box {
  width: 100%;
  background: linear-gradient(135deg, #131f36 0%, #0c1525 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

/* Subtle grid texture */
.placeholder-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.placeholder-portrait  { aspect-ratio: 4 / 5; }
.placeholder-landscape { aspect-ratio: 16 / 9; }
.placeholder-square    { aspect-ratio: 1 / 1; }

.placeholder-label {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 1;
}

.placeholder-sub {
  font-size: 0.82rem;
  color: var(--color-muted);
  max-width: 80%;
  position: relative;
  z-index: 1;
  line-height: 1.4;
}

.placeholder-tag {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  font-size: 0.72rem;
  padding: 0.22rem 0.55rem;
  background: rgba(0, 0, 0, 0.55);
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  z-index: 1;
}

/* Visual Image Containers */
.image-box {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  display: block;
  background-color: var(--color-card);
}

.img-responsive {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius-md);
  display: block;
  transition: transform var(--transition-medium);
}

.image-box:hover .img-responsive {
  transform: scale(1.02);
}

/* ========================================
   CARDS
   ======================================== */

.card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card);
}

/* Project card */
.project-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  text-decoration: none;
  color: var(--color-text);
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: rgba(56, 189, 248, 0.28);
  box-shadow: 0 24px 48px -16px rgba(0, 0, 0, 0.6);
}

.project-card-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Badges */
.badge {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.28rem 0.7rem;
  border-radius: var(--radius-pill);
  display: inline-block;
}

.badge-status {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  border: 1px solid rgba(56, 189, 248, 0.22);
}

.badge-status-active {
  background-color: rgba(34, 197, 94, 0.1);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.badge-status-study {
  background-color: rgba(251, 146, 60, 0.1);
  color: #fb923c;
  border: 1px solid rgba(251, 146, 60, 0.2);
}

.badge-category {
  color: var(--color-muted);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.project-card-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-text);
  line-height: 1.3;
}

[dir="rtl"] .project-card-title {
  font-family: var(--font-arabic);
}

.project-card-desc {
  font-size: 0.93rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-card-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: color var(--transition-fast), gap var(--transition-fast);
}

.project-card:hover .project-card-link {
  gap: 0.7rem;
}

/* ========================================
   TIMELINE
   ======================================== */

.timeline {
  position: relative;
  padding-left: 2.25rem;
  border-left: 1px solid var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 3.5rem;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: calc(-2.25rem - 4px);
  top: 0.35rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.5);
}

.timeline-year {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
  text-transform: uppercase;
}

.timeline-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--color-text);
  line-height: 1.3;
}

[dir="rtl"] .timeline-title {
  font-family: var(--font-arabic);
}

.timeline-org {
  font-size: 0.88rem;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

/* ========================================
   LIGHTBOX MODAL
   ======================================== */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(10, 17, 30, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-content {
  max-width: 860px;
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.8);
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.6);
  color: var(--color-text);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  border: 1px solid var(--color-border);
  transition: background var(--transition-fast);
}

.lightbox-close:hover {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--color-accent);
}

.lightbox-info {
  padding: 1.5rem 2rem;
}

/* ========================================
   FILTER BAR
   ======================================== */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 2.5rem;
  justify-content: center;
}

.filter-btn {
  padding: 0.55rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ========================================
   FOOTER
   ======================================== */

.site-footer {
  background-color: #06090f;
  border-top: 1px solid var(--color-border);
  padding-top: 5rem;
  padding-bottom: 3rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand .nav-logo {
  font-size: 1.4rem;
  margin-bottom: 0.85rem;
}

.footer-brand p {
  color: var(--color-muted);
  max-width: 300px;
  font-size: 0.92rem;
  line-height: 1.7;
}

.footer-column-title {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text);
  margin-bottom: 1.25rem;
}

[dir="rtl"] .footer-column-title {
  font-family: var(--font-arabic);
  letter-spacing: 0.02em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--color-muted);
}

/* ========================================
   FORMS
   ======================================== */

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1.4rem;
}

.form-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.85rem 1.15rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-muted);
  opacity: 0.7;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.08);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

/* ========================================
   GALLERY GRID
   ======================================== */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.gallery-item {
  cursor: pointer;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.gallery-item:hover {
  transform: scale(1.015);
  border-color: var(--color-accent);
}

/* ========================================
   WORLD CARDS (4-worlds section)
   ======================================== */

.worlds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.75rem;
  margin-block: 3rem;
}

.world-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem 2rem;
  transition: border-color var(--transition-fast);
}

.world-card:hover {
  border-color: var(--color-border-hover);
}

.world-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

[dir="rtl"] .world-title {
  font-family: var(--font-arabic);
}