/*
  Saad Mostafa - Personal Portfolio Styling
  Theme: Precision meets Imagination (GIS & Literature)
*/

@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@300;400;600;700;800&family=Amiri:ital,wght@0,400;0,700;1,400&family=Inter:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Fira+Code:wght@400;500&display=swap');

/* Color Variables */
:root {
  /* Common variables */
  --transition-speed: 0.4s;
  --transition-bezier: cubic-bezier(0.25, 0.8, 0.25, 1);
  --font-en-serif: 'Playfair Display', serif;
  --font-en-sans: 'Inter', sans-serif;
  --font-ar-serif: 'Amiri', serif;
  --font-ar-sans: 'Cairo', sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  /* LIGHT MODE (Novel Paper & Copper Ink) */
  --bg-color: #FAF6EE;
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --accent-color: #B25E39; /* Copper/Bronze */
  --accent-rgb: 178, 94, 57;
  --accent-glow: rgba(178, 94, 57, 0.4);
  --card-bg: rgba(255, 255, 255, 0.65);
  --card-border: rgba(178, 94, 57, 0.18);
  --nav-bg: rgba(250, 246, 238, 0.75);
  --grid-line-color: rgba(15, 23, 42, 0.06);
  --ink-color: #1e1e2d;
  --shadow-color: rgba(178, 94, 57, 0.08);
  --selection-bg: rgba(178, 94, 57, 0.15);
  --selection-color: #0F172A;
}

[data-theme="dark"] {
  /* DARK MODE (Midnight Space & Neon Electric) */
  --bg-color: #060913;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --accent-color: #00E5FF; /* Neon Cyan */
  --accent-rgb: 0, 229, 255;
  --accent-glow: rgba(0, 229, 255, 0.5);
  --card-bg: rgba(15, 23, 42, 0.45);
  --card-border: rgba(0, 229, 255, 0.15);
  --nav-bg: rgba(6, 9, 19, 0.8);
  --grid-line-color: rgba(0, 229, 255, 0.08);
  --ink-color: #00E5FF;
  --shadow-color: rgba(0, 229, 255, 0.05);
  --selection-bg: rgba(0, 229, 255, 0.25);
  --selection-color: #FFFFFF;
}

/* Base resets & styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-en-sans);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-speed) var(--transition-bezier),
              color var(--transition-speed) var(--transition-bezier);
}

/* RTL Specific adjustments */
[dir="rtl"] body {
  font-family: var(--font-ar-sans);
}

[dir="rtl"] .serif-text {
  font-family: var(--font-ar-serif);
}

.serif-text {
  font-family: var(--font-en-serif);
}

::selection {
  background-color: var(--selection-bg);
  color: var(--selection-color);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
  background: var(--card-border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

/* Layout Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 8rem 0 4rem;
  position: relative;
}

/* Background Grids */
.bg-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  background-size: 40px 40px;
  background-image: linear-gradient(to right, var(--grid-line-color) 1px, transparent 1px),
                    linear-gradient(to bottom, var(--grid-line-color) 1px, transparent 1px);
  z-index: 0;
  opacity: 0.7;
}

/* Premium Typography styling */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.8rem;
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
  z-index: 1;
}

[dir="rtl"] h2 {
  letter-spacing: 0;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 3px;
  background-color: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-glow);
  transition: all var(--transition-speed) var(--transition-bezier);
}

[dir="rtl"] h2::after {
  left: auto;
  right: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s var(--transition-bezier);
  cursor: pointer;
  border: 1px solid transparent;
  gap: 0.5rem;
}

.btn-primary {
  background-color: var(--accent-color);
  color: var(--bg-color);
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--card-border);
  backdrop-filter: blur(5px);
}

.btn-secondary:hover {
  background-color: var(--card-border);
  transform: translateY(-3px);
}

/* Floating Sticky Nav */
.navbar {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 1100px;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid var(--card-border);
  border-radius: 100px;
  padding: 0.6rem 2rem;
  box-shadow: 0 10px 30px var(--shadow-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.3s var(--transition-bezier);
}

.navbar.scrolled {
  top: 0.5rem;
  width: 95%;
  padding: 0.5rem 1.5rem;
}

.nav-brand {
  font-family: var(--font-en-serif);
  font-weight: 700;
  font-size: 1.5rem;
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  transition: all 0.3s ease;
}

[dir="rtl"] .nav-brand {
  font-family: var(--font-ar-serif);
  font-size: 1.8rem;
}

.nav-brand span {
  color: var(--accent-color);
  margin-left: 0.2rem;
}

[dir="rtl"] .nav-brand span {
  margin-left: 0;
  margin-right: 0.2rem;
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
  padding: 0.5rem 0.8rem;
  border-radius: 20px;
  font-size: 0.95rem;
}

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

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Control Toggle Buttons */
.control-btn {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 1.1rem;
}

.control-btn:hover {
  background-color: var(--card-border);
  border-color: var(--accent-color);
  color: var(--accent-color);
  transform: scale(1.05);
}

.lang-btn {
  font-size: 0.85rem;
  font-weight: 700;
  width: auto;
  padding: 0 0.8rem;
  border-radius: 20px;
}

/* Hero Section */
.hero-wrapper {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  grid-template-areas: 
    "heading image"
    "details image";
  align-items: center;
  gap: 2rem 4rem;
  min-height: 80vh;
  position: relative;
  z-index: 2;
}

.hero-heading-block {
  grid-area: heading;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-details-block {
  grid-area: details;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-image-area {
  grid-area: image;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-subtitle {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.hero-name {
  font-size: 4.2rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.hero-title {
  font-size: 2.2rem;
  line-height: 1.3;
  margin-bottom: 1.5rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.typewriter-container {
  height: 2.5rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
}

.typewriter-text {
  font-family: var(--font-mono);
  color: var(--text-secondary);
  font-size: 1.3rem;
  border-right: 2px solid var(--accent-color);
  white-space: nowrap;
  animation: blink 0.75s step-end infinite;
  padding-right: 5px;
}

[dir="rtl"] .typewriter-text {
  border-right: none;
  border-left: 2px solid var(--accent-color);
  padding-right: 0;
  padding-left: 5px;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
}

/* Profile Picture with Split Interactive Frame */
.hero-image-area {
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-frame-container {
  position: relative;
  width: 340px;
  height: 340px;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Profile Mask / Picture Container */
.profile-pic-wrapper {
  position: relative;
  width: 270px;
  height: 270px;
  border-radius: 24px;
  overflow: hidden;
  z-index: 10;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.2), rgba(0, 0, 0, 0.4));
  transition: transform 0.5s var(--transition-bezier);
}

.profile-pic-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--transition-bezier), filter 0.5s;
  filter: grayscale(15%) contrast(105%);
}

.profile-pic-wrapper:hover img {
  transform: scale(1.08);
  filter: grayscale(0%) contrast(100%);
}

/* Geometric Grid Overlay (GIS Half) */
.frame-grid-overlay {
  position: absolute;
  top: -20px;
  left: -20px;
  width: 220px;
  height: 220px;
  border-top: 2px dashed var(--accent-color);
  border-left: 2px dashed var(--accent-color);
  pointer-events: none;
  z-index: 5;
  transition: all 0.5s var(--transition-bezier);
  background-size: 20px 20px;
  background-image: linear-gradient(to right, var(--grid-line-color) 1px, transparent 1px),
                    linear-gradient(to bottom, var(--grid-line-color) 1px, transparent 1px);
}

.frame-grid-overlay::before {
  content: "LAT: 31°18'N \a LNG: 30°47'E";
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent-color);
  position: absolute;
  top: 10px;
  left: 10px;
  white-space: pre-wrap;
  opacity: 0.8;
}

[dir="rtl"] .frame-grid-overlay::before {
  left: auto;
  right: 10px;
}

/* Fluid Ink Lines Overlay (Writing Half) */
.frame-ink-overlay {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 220px;
  height: 220px;
  pointer-events: none;
  z-index: 6;
  fill: none;
  stroke: var(--accent-color);
  stroke-width: 2;
  stroke-dasharray: 400;
  stroke-dashoffset: 400;
  transition: all 0.6s var(--transition-bezier);
}

/* Interactive hover effects for the frame */
.profile-frame-container:hover .profile-pic-wrapper {
  transform: scale(1.03) translateY(-5px);
}

.profile-frame-container:hover .frame-grid-overlay {
  transform: translate(-10px, -10px) rotate(-5deg);
  border-color: var(--text-primary);
  background-color: rgba(var(--accent-rgb), 0.02);
}

.profile-frame-container:hover .frame-ink-overlay {
  transform: translate(10px, 10px) rotate(5deg);
  stroke-dashoffset: 0;
  stroke: var(--accent-color);
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 5rem;
  align-items: center;
}

.about-text p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.about-text p.lead {
  font-size: 1.3rem;
  color: var(--text-primary);
  font-weight: 500;
  border-left: 4px solid var(--accent-color);
  padding-left: 1.5rem;
}

[dir="rtl"] .about-text p.lead {
  border-left: none;
  border-right: 4px solid var(--accent-color);
  padding-left: 0;
  padding-right: 1.5rem;
}

.about-quote {
  margin: 2.5rem 0;
  padding: 2rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: 0 10px 30px var(--shadow-color);
  backdrop-filter: blur(10px);
  position: relative;
}

.about-quote::before {
  content: "“";
  font-family: var(--font-en-serif);
  font-size: 5rem;
  color: var(--accent-color);
  opacity: 0.25;
  position: absolute;
  top: -10px;
  left: 20px;
}

[dir="rtl"] .about-quote::before {
  left: auto;
  right: 20px;
  content: "”";
}

.about-quote-content {
  font-style: italic;
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 2;
}

.about-quote-author {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Technical Duality Visualization */
.duality-diagram {
  position: relative;
  height: 380px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.duality-circle {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 0 50px var(--shadow-color);
}

.circle-half {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  transition: all 0.5s;
}

.circle-left {
  clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
  border: 2px solid var(--accent-color);
  background-size: 15px 15px;
  background-image: linear-gradient(to right, var(--grid-line-color) 1px, transparent 1px),
                    linear-gradient(to bottom, var(--grid-line-color) 1px, transparent 1px);
}

.circle-right {
  clip-path: polygon(50% 0, 100% 0, 100% 100%, 50% 100%);
  border: 2px solid var(--text-secondary);
  background: radial-gradient(circle at 75% 50%, rgba(var(--accent-rgb), 0.08), transparent);
}

.duality-diagram:hover .circle-left {
  transform: rotate(-10deg);
}

.duality-diagram:hover .circle-right {
  transform: rotate(10deg);
}

.diagram-icon {
  position: absolute;
  font-size: 1.8rem;
  z-index: 5;
  color: var(--text-primary);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--bg-color);
  border: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px var(--shadow-color);
}

.icon-gis {
  left: 15%;
  top: 45%;
}

.icon-novel {
  right: 15%;
  top: 45%;
}

.center-badge {
  z-index: 6;
  background: var(--accent-color);
  color: var(--bg-color);
  padding: 0.6rem 1.2rem;
  border-radius: 30px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 15px var(--accent-glow);
}

/* Skills Section with Tabs */
.skills-tab-container {
  max-width: 900px;
  margin: 0 auto;
}

.skills-tabs {
  display: flex;
  justify-content: center;
  margin-bottom: 4rem;
  border-bottom: 1px solid var(--card-border);
  gap: 2rem;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.4rem;
  font-weight: 700;
  padding: 1rem 2rem;
  cursor: pointer;
  position: relative;
  transition: color 0.3s;
}

[dir="rtl"] .tab-btn {
  font-family: var(--font-ar-sans);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--accent-color);
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--accent-color);
  transform: scaleX(0);
  transition: transform 0.3s var(--transition-bezier);
  box-shadow: 0 0 10px var(--accent-glow);
}

.tab-btn.active::after {
  transform: scaleX(1);
}

.skills-content {
  position: relative;
  min-height: 300px;
}

.skills-panel {
  display: none;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2.5rem;
  animation: fadeIn 0.5s ease;
}

.skills-panel.active {
  display: grid;
}

/* Skill Card */
.skill-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(12px) saturate(180%);
  box-shadow: 0 8px 32px var(--shadow-color);
  transition: all 0.4s var(--transition-bezier);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--accent-color);
  transform: scaleY(0);
  transition: transform 0.3s var(--transition-bezier);
}

[dir="rtl"] .skill-card::before {
  left: auto;
  right: 0;
}

.skill-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px var(--shadow-color);
  border-color: rgba(var(--accent-rgb), 0.3);
}

.skill-card:hover::before {
  transform: scaleY(1);
}

.skill-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(var(--accent-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--accent-color);
  font-size: 1.5rem;
  transition: transform 0.3s;
}

.skill-card:hover .skill-icon {
  transform: scale(1.1) rotate(5deg);
}

.skill-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.skill-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Projects Section with 3D Flip Cards */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 3rem;
  perspective: 1500px; /* Essential for 3D flip */
}

.project-card-wrapper {
  position: relative;
  height: 480px;
  perspective: 1500px;
}

.project-card-3d {
  position: relative;
  width: 100%;
  height: 100%;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.project-card-wrapper:hover .project-card-3d,
.project-card-wrapper.flipped .project-card-3d {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 24px;
  border: 1px solid var(--card-border);
  overflow: hidden;
  box-shadow: 0 15px 35px var(--shadow-color);
  display: flex;
  flex-direction: column;
}

/* Front Face */
.card-front {
  background: var(--card-bg);
  backdrop-filter: blur(12px) saturate(180%);
}

.project-img-wrapper {
  position: relative;
  height: 240px;
  width: 100%;
  overflow: hidden;
  background-color: rgba(var(--accent-rgb), 0.05);
}

.project-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.project-card-3d:hover .project-img-wrapper img {
  transform: scale(1.05);
}

.project-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(var(--accent-rgb), 0.9);
  color: var(--bg-color);
  padding: 0.4rem 1rem;
  border-radius: 30px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

[dir="rtl"] .project-badge {
  right: auto;
  left: 1rem;
}

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

.project-type {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-color);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.project-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.project-summary {
  color: var(--text-secondary);
  font-size: 0.95rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.flip-hint {
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 500;
}

/* Back Face */
.card-back {
  background: var(--text-primary);
  color: var(--bg-color);
  transform: rotateY(180deg);
  padding: 2.5rem;
  justify-content: space-between;
}

.card-back-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.1;
  background-size: 30px 30px;
  background-image: linear-gradient(to right, var(--bg-color) 1px, transparent 1px),
                    linear-gradient(to bottom, var(--bg-color) 1px, transparent 1px);
  pointer-events: none;
}

.card-back-content {
  position: relative;
  z-index: 2;
}

.project-details {
  font-size: 1rem;
  color: var(--bg-color);
  opacity: 0.85;
  margin-bottom: 2rem;
}

.project-bullets {
  list-style: none;
  margin-bottom: 2rem;
}

.project-bullets li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.8rem;
  font-size: 0.9rem;
}

[dir="rtl"] .project-bullets li {
  padding-left: 0;
  padding-right: 1.5rem;
}

.project-bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-weight: bold;
}

[dir="rtl"] .project-bullets li::before {
  left: auto;
  right: 0;
  content: '←';
}

.project-actions {
  display: flex;
  gap: 1rem;
  position: relative;
  z-index: 3;
}

.project-actions .btn {
  font-size: 0.9rem;
  padding: 0.6rem 1.5rem;
}

/* Lightbox/Gallery for Project Details */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(6, 9, 19, 0.95);
  z-index: 10000;
  display: none;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(10px);
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  position: relative;
  max-width: 90%;
  max-height: 85%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 70vh;
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.lightbox-caption {
  color: #fff;
  margin-top: 1.5rem;
  font-size: 1.1rem;
  text-align: center;
  max-width: 600px;
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  transition: color 0.3s;
}

.lightbox-close:hover {
  color: var(--accent-color);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  transition: background 0.3s, color 0.3s;
}

.lightbox-nav:hover {
  background: var(--accent-color);
  color: var(--bg-color);
}

.lightbox-prev {
  left: -80px;
}

.lightbox-next {
  right: -80px;
}

/* Contact / Footer Section */
.contact-section {
  background: var(--card-bg);
  border-top: 1px solid var(--card-border);
  backdrop-filter: blur(12px) saturate(180%);
  padding: 6rem 0 3rem;
  margin-top: 6rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 4rem;
  margin-bottom: 4rem;
}

.contact-brand-col h3 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.contact-brand-col p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 320px;
}

.contact-links-col h4 {
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  color: var(--accent-color);
}

.contact-list {
  list-style: none;
}

.contact-list li {
  margin-bottom: 1rem;
}

.contact-item {
  color: var(--text-secondary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 1.05rem;
  transition: color 0.3s;
}

.contact-item:hover {
  color: var(--text-primary);
}

.contact-item svg {
  color: var(--accent-color);
  width: 20px;
  height: 20px;
}

.footer-bottom {
  border-top: 1px solid var(--card-border);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-bottom a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
}

.footer-bottom a:hover {
  color: var(--text-primary);
}

/* Animations */
@keyframes blink {
  from, to { border-color: transparent }
  50% { border-color: var(--accent-color); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Reveal-on-scroll styles */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* Responsive Breakpoints */
@media (max-width: 992px) {
  h2 {
    font-size: 2.2rem;
  }
  
  .hero-wrapper {
    grid-template-columns: 1fr;
    grid-template-areas: 
      "heading"
      "image"
      "details";
    gap: 2.5rem;
    text-align: center;
    padding-top: 4rem;
  }

  .hero-heading-block,
  .hero-details-block {
    align-items: center;
  }
  
  .hero-desc {
    margin: 0 auto 2.5rem;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .typewriter-container {
    justify-content: center;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .duality-diagram {
    height: 320px;
  }
  
  .lightbox-prev {
    left: 20px;
    top: auto;
    bottom: -60px;
    transform: none;
  }
  
  .lightbox-next {
    right: 20px;
    top: auto;
    bottom: -60px;
    transform: none;
  }
}

@media (max-width: 768px) {
  section {
    padding: 6rem 0 3rem;
  }
  
  .navbar {
    padding: 0.5rem 1rem;
    width: 95%;
  }
  
  .nav-menu {
    display: none; /* In a real project we would add a burger menu, but keeping it clean for SPA controls */
  }
  
  .hero-name {
    font-size: 2.8rem;
  }
  .hero-title {
    font-size: 1.8rem;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .project-card-wrapper {
    height: 450px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .profile-frame-container {
    width: 280px;
    height: 280px;
  }
  
  .profile-pic-wrapper {
    width: 220px;
    height: 220px;
  }
  
  .frame-grid-overlay {
    width: 170px;
    height: 170px;
    top: -10px;
    left: -10px;
  }
  
  [dir="rtl"] .frame-grid-overlay {
    left: auto;
    right: -10px;
  }
  
  .frame-ink-overlay {
    width: 170px;
    height: 170px;
    bottom: -10px;
    right: -10px;
  }
  
  [dir="rtl"] .frame-ink-overlay {
    right: auto;
    left: -10px;
  }
  
  .hero-name {
    font-size: 2.2rem;
  }
  
  .hero-title {
    font-size: 1.4rem;
  }
}