/* ==========================================================================
   ABDULLAH ARSHAD — PERSONAL PORTFOLIO
   Design Philosophy: Minimal, Modern, Professional Software Engineer
   Color Palette: Deep Slate Obsidian (#0a0a0c, #121318), Crisp Type, Cyan/White Accents
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #090a0f;
  --bg-surface: #11131a;
  --bg-card: #141722;
  --bg-card-hover: #191e2c;
  
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(56, 189, 248, 0.3);
  
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --success: #10b981;
  
  --font-heading: 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  background-color: var(--bg);
  color: var(--text-secondary);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Subtle background illumination */
.bg-ambient {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1200px;
  height: 600px;
  background: radial-gradient(circle at 50% 10%, rgba(56, 189, 248, 0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* Container */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Minimal Navbar */
.site-header {
  position: fixed;
  top: 1.25rem;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: 0 1rem;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 900px;
  background: rgba(17, 19, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.6rem 1.25rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transition: var(--transition);
}

.nav-bar:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.nav-logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

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

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

.nav-link {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: #34d399;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
}

.status-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--accent);
  color: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.82rem;
}

/* Hero Section */
.hero-section {
  padding-top: 9rem;
  padding-bottom: 4rem;
}

.hero-content {
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.hero-bio {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 2.25rem;
  max-width: 680px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.social-bar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.social-link {
  font-size: 0.88rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

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

/* Metrics Row */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin: 3rem 0 5rem;
}

.metric-box {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: var(--transition);
}

.metric-box:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.metric-value {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Sections */
.section {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.section-header {
  margin-bottom: 3rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  display: block;
}

.section-heading {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  letter-spacing: -0.02em;
}

/* Projects Showcase */
.project-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.filter-chip {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.filter-chip:hover {
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.filter-chip.active {
  background: var(--text-primary);
  color: var(--bg);
  border-color: var(--text-primary);
  font-weight: 600;
}

.projects-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.project-item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  cursor: pointer;
}

.project-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.6);
}

.project-thumb-wrap {
  width: 100%;
  height: 250px;
  background: #0d0f15;
  overflow: hidden;
  position: relative;
}

.project-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.4s ease;
}

.project-item:hover .project-thumb {
  transform: scale(1.03);
}

.project-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.project-category {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
}

.project-name {
  font-size: 1.3rem;
  margin-bottom: 0.6rem;
}

.project-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.tech-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

/* Experience Section */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 800px;
}

.timeline-item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  position: relative;
  transition: var(--transition);
}

.timeline-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.timeline-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.timeline-role {
  font-size: 1.2rem;
  color: var(--text-primary);
}

.timeline-company {
  color: var(--accent);
  font-weight: 500;
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.timeline-bullets {
  list-style: none;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.timeline-bullets li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  display: flex;
  gap: 0.6rem;
  line-height: 1.6;
}

.timeline-bullets li::before {
  content: '▹';
  color: var(--accent);
  font-weight: bold;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.skill-category-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: var(--transition);
}

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

.skill-cat-title {
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-pill {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.skill-pill:hover {
  color: var(--text-primary);
  border-color: var(--accent);
}

/* Contact Section */
.contact-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.contact-info h2 {
  font-size: clamp(2rem, 3.5vw, 2.5rem);
  margin-bottom: 1rem;
}

.contact-info p {
  font-size: 1.05rem;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.direct-contacts {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.direct-contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
}

.form-input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
}

/* Footer */
.site-footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Modal Popup */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

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

.modal-sheet {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: 800px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  padding: 2.25rem;
  position: relative;
  transform: translateY(20px);
  transition: transform 0.25s ease;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8);
}

.modal-overlay.active .modal-sheet {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: var(--transition);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.15);
}

.modal-img-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.modal-img {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: transform 0.2s ease, border-color 0.2s ease;
  cursor: zoom-in;
}

.modal-img:hover {
  transform: scale(1.02);
  border-color: var(--accent);
}

/* Image Lightbox (Same Tab Zoom Overlay) */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 14, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.lightbox-content {
  max-width: 94vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 88vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(255, 255, 255, 0.12);
  transform: scale(0.95);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox-overlay.active .lightbox-content img {
  transform: scale(1);
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 42px;
  height: 42px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  color: #fff;
  font-size: 1.6rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  z-index: 100;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: scale(1.1);
}

/* Toast */
.toast-notice {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--text-primary);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  z-index: 1100;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.toast-notice.show {
  transform: translateX(-50%) translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .metrics-strip { grid-template-columns: repeat(2, 1fr); }
  .projects-list { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .contact-wrapper { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 600px) {
  .hero-title { font-size: 2.2rem; }
  .metrics-strip { grid-template-columns: 1fr; }
  .contact-wrapper { padding: 2rem 1.25rem; }
  .site-footer { flex-direction: column; text-align: center; }
}