/* ==========================================================================
   AMJAD SALAH - MECHATRONICS ENGINEER PORTFOLIO STYLES
   Style Identity: Premium Tech / Apple + Linear + Stripe Aesthetic
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  /* Color Palette */
  --bg-primary: #0A1128;
  --bg-secondary: #1C2541;
  --bg-card: rgba(28, 37, 65, 0.6);
  --bg-card-hover: rgba(28, 37, 65, 0.85);
  --bg-glass: rgba(10, 17, 40, 0.75);
  
  --accent-blue: #3A86FF;
  --accent-cyan: #4CC9F0;
  --accent-glow: rgba(58, 134, 255, 0.35);
  --accent-cyan-glow: rgba(76, 201, 240, 0.3);

  --text-main: #E8E9F3;
  --text-muted: #8B93B8;
  --text-dim: #646E96;

  --border-color: #2A3358;
  --border-glass: rgba(42, 51, 88, 0.6);
  --border-highlight: rgba(76, 201, 240, 0.5);

  /* Typography */
  --font-heading-en: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-ar: 'Cairo', -apple-system, BlinkMacSystemFont, sans-serif;

  --font-heading: var(--font-heading-en);
  --font-body: var(--font-body-en);

  /* Transitions & Radii */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px var(--accent-glow);
}

/* RTL Overrides for Arabic */
[dir="rtl"] {
  --font-heading: var(--font-ar);
  --font-body: var(--font-ar);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: dark;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#canvas-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
}

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

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

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 2;
}

/* Page Loader Overlay */
.page-loader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 1s infinite linear;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loader-text {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--accent-cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.25rem 0;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  transition: all var(--transition-smooth);
}

.navbar.scrolled {
  padding: 0.85rem 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.logo-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.4rem 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  border-radius: 2px;
  transition: width var(--transition-smooth);
}

[dir="rtl"] .nav-link::after {
  left: auto;
  right: 0;
}

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

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

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* Language Switcher */
.lang-btn {
  background: rgba(28, 37, 65, 0.7);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-smooth);
}

.lang-btn:hover {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  box-shadow: 0 0 15px var(--accent-glow);
}

.lang-btn svg {
  width: 16px;
  height: 16px;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-toggle svg {
  width: 24px;
  height: 24px;
}

/* ==========================================================================
   BUTTONS & BADGES
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-smooth);
  border: none;
  outline: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), #2563EB);
  color: #FFFFFF;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: 0 0 25px var(--accent-blue), 0 0 40px rgba(58, 134, 255, 0.4);
}

.btn-secondary {
  background: rgba(28, 37, 65, 0.7);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  transform: scale(1.05);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 20px var(--accent-cyan-glow);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  background: rgba(58, 134, 255, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(76, 201, 240, 0.3);
}

.badge-green {
  background: rgba(16, 185, 129, 0.12);
  color: #10B981;
  border-color: rgba(16, 185, 129, 0.3);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 5rem;
  overflow: hidden;
}

.hero-bg-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-img-full {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  filter: brightness(0.65) contrast(1.1);
  transform: scale(1.02);
  transition: transform var(--transition-slow);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center 30%, rgba(10, 17, 40, 0.4) 0%, rgba(10, 17, 40, 0.85) 75%, var(--bg-primary) 100%),
              linear-gradient(to top, var(--bg-primary) 0%, rgba(10, 17, 40, 0.6) 40%, rgba(10, 17, 40, 0.3) 100%);
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1rem;
}

.hero-tag {
  margin-bottom: 1.25rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 6vw, 4.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  background: linear-gradient(180deg, #FFFFFF 0%, #B8C2E0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.hero-bio-short {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 2.2rem auto;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.scroll-indicator:hover {
  color: var(--accent-cyan);
}

.scroll-indicator svg {
  width: 22px;
  height: 22px;
  animation: pulse-arrow 2s infinite cubic-bezier(0.45, 0, 0.55, 1);
}

@keyframes pulse-arrow {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(8px); opacity: 1; }
}

/* ==========================================================================
   SECTIONS GENERAL
   ========================================================================== */
section {
  padding: 6.5rem 0;
  position: relative;
  z-index: 2;
}

.section-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem auto;
}

.section-subtitle {
  color: var(--accent-cyan);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.8vw, 2.8rem);
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

/* ==========================================================================
   ABOUT ME SECTION
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 3.5rem;
  align-items: center;
}

.about-img-box {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  background: var(--bg-card);
}

.about-img-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(10, 17, 40, 0.9) 100%);
  z-index: 2;
}

.about-img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  object-position: center top;
  transition: transform var(--transition-slow);
}

.about-img-box:hover .about-img {
  transform: scale(1.03);
}

.about-card-badge {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  z-index: 3;
  background: rgba(10, 17, 40, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

[dir="rtl"] .about-card-badge {
  left: auto;
  right: 1.5rem;
}

.about-badge-icon {
  width: 12px;
  height: 12px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-cyan);
}

.about-badge-text h4 {
  font-size: 0.85rem;
  color: var(--text-main);
  font-weight: 700;
}

.about-badge-text p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.about-paragraph {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-top: 1rem;
}

.highlight-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-smooth);
}

.highlight-item:hover {
  transform: translateY(-4px);
  border-color: var(--accent-blue);
  box-shadow: 0 8px 25px rgba(58, 134, 255, 0.15);
}

.highlight-item h4 {
  font-size: 1rem;
  color: var(--text-main);
  margin-bottom: 0.3rem;
  font-family: var(--font-heading);
}

.highlight-item p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   TIMELINE SECTION
   ========================================================================== */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-blue) 0%, var(--accent-cyan) 50%, var(--border-color) 100%);
  transform: translateX(-50%);
}

[dir="rtl"] .timeline::before {
  left: auto;
  right: 50%;
  transform: translateX(50%);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  width: 50%;
  padding: 0 2.5rem;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
  text-align: left;
}

[dir="rtl"] .timeline-item:nth-child(odd) {
  left: auto;
  right: 0;
  text-align: left;
}

[dir="rtl"] .timeline-item:nth-child(even) {
  left: auto;
  right: 50%;
  text-align: right;
}

.timeline-dot {
  position: absolute;
  top: 1.5rem;
  width: 18px;
  height: 18px;
  background: var(--bg-primary);
  border: 3px solid var(--accent-cyan);
  border-radius: 50%;
  z-index: 5;
  box-shadow: 0 0 15px var(--accent-cyan);
  transition: all var(--transition-smooth);
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -9px;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -9px;
}

[dir="rtl"] .timeline-item:nth-child(odd) .timeline-dot {
  right: auto;
  left: -9px;
}

[dir="rtl"] .timeline-item:nth-child(even) .timeline-dot {
  left: auto;
  right: -9px;
}

.timeline-item:hover .timeline-dot {
  background: var(--accent-blue);
  transform: scale(1.3);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.5rem 1.75rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-smooth);
  backdrop-filter: blur(10px);
}

.timeline-content:hover {
  transform: translateY(-6px);
  border-color: var(--accent-cyan);
  box-shadow: 0 10px 30px -10px var(--accent-cyan-glow);
}

.timeline-date {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.timeline-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--text-main);
  margin-bottom: 0.3rem;
}

.timeline-location {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.timeline-item:nth-child(odd) .timeline-location {
  justify-content: flex-end;
}

[dir="rtl"] .timeline-item:nth-child(odd) .timeline-location {
  justify-content: flex-start;
}

.timeline-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   FLAGSHIP PROJECT SECTION
   ========================================================================== */
.flagship-card {
  background: linear-gradient(135deg, rgba(28, 37, 65, 0.9) 0%, rgba(10, 17, 40, 0.95) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 3.5rem 3rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px var(--accent-glow);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.flagship-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), 0 0 45px var(--accent-glow);
}

.flagship-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.flagship-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.flagship-title-box h3 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  color: var(--text-main);
  margin-top: 0.4rem;
  line-height: 1.2;
}

.flagship-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.flagship-body p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.tech-tag {
  background: rgba(10, 17, 40, 0.7);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  color: var(--text-main);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.tech-tag svg {
  width: 14px;
  height: 14px;
  color: var(--accent-cyan);
}

.flagship-visual {
  background: rgba(10, 17, 40, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  position: relative;
}

.stat-box {
  margin-bottom: 1.5rem;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 0.5rem;
}

.flagship-diagram-pills {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.diagram-step {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.diagram-step span {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 700;
}

/* ==========================================================================
   RESEARCH & PUBLICATION
   ========================================================================== */
.research-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: center;
  transition: all var(--transition-smooth);
}

.research-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow);
}

.research-icon {
  width: 64px;
  height: 64px;
  background: rgba(58, 134, 255, 0.15);
  border: 1px solid var(--accent-blue);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.research-icon svg {
  width: 32px;
  height: 32px;
}

.research-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  color: var(--text-main);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.research-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.research-meta strong {
  color: var(--text-main);
}

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: all var(--transition-smooth);
  height: 100%;
}

.skill-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-cyan);
  box-shadow: 0 10px 30px -10px var(--accent-cyan-glow);
}

.skill-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.skill-icon {
  width: 44px;
  height: 44px;
  background: rgba(76, 201, 240, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.skill-icon svg {
  width: 22px;
  height: 22px;
}

.skill-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--text-main);
}

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

.skill-item {
  font-size: 0.92rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-item::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-blue);
  border-radius: 50%;
}

/* ==========================================================================
   CURRENT WORK SECTION
   ========================================================================== */
.current-card {
  background: linear-gradient(135deg, rgba(28, 37, 65, 0.8), rgba(10, 17, 40, 0.85));
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 3rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
}

.current-info h3 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.current-role {
  font-size: 1.05rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 1rem;
}

.current-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 750px;
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 3.5rem;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-info-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--text-main);
}

.contact-info-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-link-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  transition: all var(--transition-smooth);
}

.contact-link-card:hover {
  transform: translateX(6px);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 20px var(--accent-cyan-glow);
}

[dir="rtl"] .contact-link-card:hover {
  transform: translateX(-6px);
}

.contact-icon-box {
  width: 48px;
  height: 48px;
  background: rgba(58, 134, 255, 0.12);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  transition: color var(--transition-fast);
}

.contact-link-card:hover .contact-icon-box {
  color: var(--accent-blue);
  background: rgba(58, 134, 255, 0.25);
}

.contact-icon-box svg {
  width: 22px;
  height: 22px;
}

.contact-details label {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
}

.contact-details span {
  font-size: 1rem;
  color: var(--text-main);
  font-weight: 600;
}

/* Contact Form */
.contact-form-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  backdrop-filter: blur(12px);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.form-input,
.form-textarea {
  width: 100%;
  background: rgba(10, 17, 40, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.1rem;
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px var(--accent-cyan-glow);
}

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

/* Toast Message */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 2000;
  background: rgba(10, 17, 40, 0.95);
  border: 1px solid var(--accent-cyan);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 25px var(--accent-cyan-glow);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text-main);
  font-weight: 600;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-smooth);
}

[dir="rtl"] .toast {
  right: auto;
  left: 2rem;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-icon {
  color: #10B981;
}

.toast-icon svg {
  width: 24px;
  height: 24px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

/* ==========================================================================
   ADMIN DASHBOARD STYLES
   ========================================================================== */
.admin-body {
  background-color: var(--bg-primary);
  min-height: 100vh;
}

.admin-login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  position: relative;
  z-index: 2;
}

.admin-login-card {
  width: 100%;
  max-width: 440px;
  background: rgba(28, 37, 65, 0.8);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px var(--accent-glow);
}

.admin-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.admin-brand h2 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--text-main);
}

.admin-login-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.8rem;
  line-height: 1.6;
}

.login-error-msg {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #F87171;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-top: 1rem;
}

.admin-dashboard-container {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  padding-bottom: 5rem;
}

.admin-header {
  background: rgba(10, 17, 40, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 1.2rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.admin-header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.admin-user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-badge {
  font-size: 0.82rem;
  background: rgba(58, 134, 255, 0.15);
  border: 1px solid var(--accent-blue);
  color: var(--accent-cyan);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
}

.admin-main {
  margin-top: 2.5rem;
}

.admin-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.admin-tab {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 0.75rem 1.25rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.admin-tab:hover {
  color: var(--text-main);
  background: rgba(28, 37, 65, 0.5);
}

.admin-tab.active {
  color: var(--accent-cyan);
  background: rgba(58, 134, 255, 0.15);
  border: 1px solid var(--border-highlight);
}

.admin-tab-content {
  display: none;
}

.admin-tab-content.active {
  display: block;
}

.admin-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  backdrop-filter: blur(12px);
}

.admin-card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--text-main);
  margin-bottom: 1.5rem;
}

.admin-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.color-picker-input {
  width: 50px;
  height: 42px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: none;
  cursor: pointer;
}

.admin-item-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.admin-item-card {
  background: rgba(10, 17, 40, 0.6);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.admin-modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 17, 40, 0.85);
  backdrop-filter: blur(16px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.admin-modal-content {
  width: 100%;
  max-width: 680px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  max-height: 90vh;
  overflow-y: auto;
}

.admin-modal-content h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--text-main);
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   ANIMATIONS & REVEAL ON SCROLL
   ========================================================================== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 992px) {
  .about-grid {
    grid-template-columns: 1fr;
  }

  .about-img {
    height: 380px;
  }

  .flagship-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    left: 20px;
  }

  [dir="rtl"] .timeline::before {
    left: auto;
    right: 20px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 3.5rem;
    padding-right: 0;
    text-align: left !important;
  }

  .timeline-item:nth-child(even) {
    left: 0;
  }

  [dir="rtl"] .timeline-item {
    padding-right: 3.5rem;
    padding-left: 0;
    text-align: right !important;
  }

  [dir="rtl"] .timeline-item:nth-child(even) {
    right: 0;
  }

  .timeline-dot {
    left: 11px !important;
    right: auto !important;
  }

  [dir="rtl"] .timeline-dot {
    right: 11px !important;
    left: auto !important;
  }

  .timeline-item:nth-child(odd) .timeline-location {
    justify-content: flex-start !important;
  }

  [dir="rtl"] .timeline-item:nth-child(odd) .timeline-location {
    justify-content: flex-end !important;
  }

  .current-card {
    grid-template-columns: 1fr;
  }

  .research-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: rgba(10, 17, 40, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem 0;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-150%);
    transition: transform var(--transition-smooth);
  }

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

  .mobile-toggle {
    display: block;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .flagship-card {
    padding: 2rem 1.5rem;
  }

  .admin-form-grid {
    grid-template-columns: 1fr;
  }
}