/* 
|=============================================================================|
              CSS Stylesheet for Personal Portfolio Website
|=============================================================================|
*/

/* ===== CSS VARIABLES ===== */
:root {
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-card: #171717;
  --bg-card-hover: #262626;
  --border-primary: #262626;
  --border-secondary: #404040;
  --text-primary: #ffffff;
  --text-secondary: #a3a3a3;
  --text-muted: #525252;

  /* Blue accent colors */
  --accent-blue: #3b82f6;
  --accent-blue-light: #60a5fa;
  --accent-blue-dark: #1d4ed8;
  --accent-navy: #1e3a5f;
  --accent-blue-muted: rgba(59, 130, 246, 0.15);
  --accent-blue-glow: rgba(59, 130, 246, 0.1);

  --accent: #ffffff;
  --accent-muted: rgba(255, 255, 255, 0.1);
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
}

/* ===== RESET & BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "SF Mono", "Fira Code", "JetBrains Mono", "Roboto Mono",
    "Consolas", "Monaco", monospace;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Headings use a slightly different weight for hierarchy */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "SF Mono", "Fira Code", "JetBrains Mono", "Roboto Mono",
    "Consolas", "Monaco", monospace;
  font-weight: 600;
}

/* ===== UTILITY CLASSES ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  margin-bottom: 20px;
  text-align: center;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px;
  line-height: 1.7;
}

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

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

/* ===== NAVIGATION ===== */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-primary);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 500;
  transition: all 0.2s ease;
  padding: 10px 18px;
  border-radius: var(--radius-xl);
  font-size: 0.85rem;
  opacity: 0.7;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.nav-links a:hover {
  opacity: 1;
  color: var(--accent-blue-light);
  background: var(--accent-blue-muted);
}

.nav-links a.active {
  opacity: 1;
  color: var(--accent-blue-light);
  background: var(--accent-blue-muted);
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg-primary);
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
}

/* Subtle glow effects with blue tint */
.hero::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    var(--accent-blue-glow) 0%,
    transparent 70%
  );
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -200px;
  left: -200px;
  width: 600px;
  height: 600px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 60px;
  width: 100%;
}

.hero-text {
  flex: 1;
}

.hero-image {
  flex-shrink: 0;
}

.profile-picture {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  border: 3px solid var(--border-secondary);
  box-shadow: 0 0 60px rgba(59, 130, 246, 0.08),
    0 0 120px rgba(255, 255, 255, 0.03);
  object-fit: cover;
  transition: all 0.3s ease;
  background: var(--bg-card);
}

.profile-picture:hover {
  transform: scale(1.03);
  border-color: var(--accent-blue);
  box-shadow: 0 0 80px rgba(59, 130, 246, 0.15),
    0 0 120px rgba(255, 255, 255, 0.05);
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: clamp(0.85rem, 2vw, 1.1rem);
  margin-bottom: 24px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero-description {
  font-size: 0.95rem;
  max-width: 550px;
  margin-bottom: 40px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.cta-button {
  display: inline-block;
  padding: 14px 28px;
  background: var(--text-primary);
  border: none;
  color: var(--bg-primary);
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius-xl);
  transition: all 0.2s ease;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.cta-button:hover {
  background: var(--accent-blue);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.3);
}

.cta-button:active {
  transform: scale(0.98);
}

/* ===== PROJECTS SECTION ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 24px;
  margin-top: 50px;
}

.project-card {
  background: var(--bg-card);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--border-primary);
  transition: all 0.3s ease;
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-blue);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(59, 130, 246, 0.1);
}

.project-image {
  height: 180px;
  background: linear-gradient(
    135deg,
    var(--accent-navy) 0%,
    var(--bg-card) 100%
  );
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  border-bottom: 1px solid var(--border-primary);
}

.project-content {
  padding: 28px;
}

.project-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.7;
  font-size: 0.875rem;
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.project-tag {
  background: var(--accent-blue-muted);
  color: var(--accent-blue-light);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 500;
  border: 1px solid rgba(59, 130, 246, 0.2);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.project-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.project-link {
  padding: 10px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
}

.project-link:hover {
  background: var(--accent-blue);
  color: var(--text-primary);
  border-color: var(--accent-blue);
}

/* ===== GALLERY SECTION ===== */
.gallery {
  background: var(--bg-secondary);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 50px;
}

.gallery-item {
  aspect-ratio: 4/3;
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  transition: transform 0.3s ease;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
}

.gallery-item:hover {
  transform: scale(1.02);
  border-color: var(--accent-blue);
}

.gallery-item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.95));
  color: var(--text-primary);
  padding: 24px 20px 20px;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
  transform: translateY(0);
}

.gallery-overlay h3 {
  margin: 0 0 6px 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.gallery-overlay p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ===== CONTACT SECTION ===== */
.contact {
  width: 100vw;
  margin: 0;
  margin-left: calc(-50vw + 50%);
  background: var(--bg-primary);
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
  padding: 100px 0 0 0;
  border-top: 1px solid var(--border-primary);
}

/* Subtle glow effects with blue */
.contact::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(
    circle,
    var(--accent-blue-glow) 0%,
    transparent 70%
  );
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.contact::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.contact .container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 80px 20px;
}

.contact .section-title {
  color: var(--text-primary);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  margin-bottom: 20px;
  text-align: center;
  letter-spacing: -0.02em;
}

.contact .section-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 60px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  line-height: 1.8;
}

.contact-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.contact-info {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-top: 60px;
  flex-wrap: wrap;
  align-items: center;
}

.contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform 0.2s ease;
}

.contact-item:hover {
  transform: translateY(-6px);
}

.contact-item .icon {
  margin-bottom: 20px;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border-radius: 50%;
  border: 1px solid var(--border-primary);
  transition: all 0.2s ease;
}

.contact-item:hover .icon {
  border-color: var(--accent-blue);
  background: var(--accent-blue-muted);
}

.contact-item .icon img {
  width: 28px;
  height: 28px;
  filter: brightness(0) invert(1);
  opacity: 0.8;
  transition: all 0.2s ease;
}

.contact-item:hover .icon img {
  opacity: 1;
  filter: brightness(0) invert(0.7) sepia(1) saturate(5) hue-rotate(190deg);
}

.contact-item a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: 12px 24px;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  transition: all 0.2s ease;
  font-size: 0.85rem;
  background: transparent;
  letter-spacing: 0.02em;
}

.contact-item a:hover {
  background: var(--accent-blue);
  color: var(--text-primary);
  border-color: var(--accent-blue);
}

/* ===== PAGE HEADER (FOR SEPARATE PAGES) ===== */
.page-header {
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: 140px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-primary);
}

.page-header::before {
  content: "";
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(
    circle,
    var(--accent-blue-glow) 0%,
    transparent 70%
  );
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

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

.header-content h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 16px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.header-subtitle {
  font-size: 0.95rem;
  margin-bottom: 30px;
  color: var(--text-secondary);
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
  padding: 10px 20px;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.back-link:hover {
  color: var(--accent-blue-light);
  background: var(--accent-blue-muted);
  border-color: rgba(59, 130, 246, 0.3);
}

/* ===== GALLERY CATEGORIES ===== */
.gallery-category {
  margin-bottom: 80px;
}

.category-title {
  font-size: 1.5rem;
  margin-bottom: 32px;
  color: var(--text-primary);
  text-align: center;
  position: relative;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.category-title::after {
  content: "";
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background: var(--accent-blue);
  border-radius: 1px;
}

/* ===== GALLERY PLACEHOLDERS ===== */
.gallery-placeholder {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: all 0.2s ease;
}

.gallery-placeholder:hover {
  transform: scale(1.02);
  border-color: var(--accent-blue);
}

.placeholder-content h3 {
  font-size: 2.5rem;
  margin: 0 0 10px 0;
}

.placeholder-content p {
  font-size: 0.9rem;
  margin: 0 0 5px 0;
  font-weight: 600;
  color: var(--text-primary);
}

.placeholder-content small {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ===== SECTION CTA ===== */
.section-cta {
  text-align: center;
  margin-top: 60px;
  padding: 48px 32px;
  background: linear-gradient(
    135deg,
    var(--accent-navy) 0%,
    var(--bg-card) 100%
  );
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
}

.section-cta h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--text-primary);
  font-weight: 600;
}

.section-cta p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.section-cta .cta-button {
  background: var(--accent-blue);
  color: var(--text-primary);
  border: none;
}

.section-cta .cta-button:hover {
  background: var(--accent-blue-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.3);
}

/* ===== IMAGE MODAL ===== */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  padding-top: 80px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
}

.modal-content {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 700px;
  border-radius: var(--radius-xl);
}

#caption {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 700px;
  text-align: center;
  color: var(--text-secondary);
  padding: 20px 0;
  font-size: 0.9rem;
}

.close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: var(--text-secondary);
  font-size: 32px;
  font-weight: 300;
  transition: 0.2s;
  cursor: pointer;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
}

.close:hover {
  color: var(--accent-blue-light);
  background: var(--accent-blue-muted);
  border-color: rgba(59, 130, 246, 0.3);
}

/* ===== PROJECTS PAGE ===== */
.projects-page {
  background: var(--bg-primary);
}

/* ===== GALLERY PAGE ===== */
.gallery-page {
  background: var(--bg-primary);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 968px) {
  .hero-content {
    flex-direction: column;
    text-align: center;
    gap: 40px;
  }

  .hero-image {
    order: -1;
  }

  .profile-picture {
    width: 220px;
    height: 220px;
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .section {
    padding: 80px 0;
  }

  .contact {
    padding: 80px 0 0 0;
  }

  .contact .section-title {
    font-size: 1.5rem;
  }

  .contact .section-subtitle {
    font-size: 0.85rem;
    padding: 0 20px;
    margin-bottom: 40px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .contact-info {
    flex-direction: column;
    gap: 32px;
    margin-top: 40px;
  }

  .contact-item .icon {
    width: 56px;
    height: 56px;
  }

  .contact-item .icon img {
    width: 24px;
    height: 24px;
  }

  .profile-picture {
    width: 180px;
    height: 180px;
  }

  .page-header {
    padding: 120px 0 60px;
  }

  .header-content h1 {
    font-size: 1.75rem;
  }

  .header-subtitle {
    font-size: 0.85rem;
    padding: 0 20px;
  }

  .category-title {
    font-size: 1.25rem;
  }

  .section-cta {
    margin-top: 40px;
    padding: 36px 24px;
  }

  .modal-content {
    width: 95%;
  }

  .close {
    font-size: 24px;
    right: 15px;
    width: 40px;
    height: 40px;
  }

  .project-links {
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .nav-container {
    padding: 0 16px;
  }

  .logo {
    font-size: 16px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .header-content h1 {
    font-size: 1.5rem;
  }

  .profile-picture {
    width: 160px;
    height: 160px;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .cta-button {
    padding: 12px 24px;
    font-size: 0.8rem;
  }

  .project-card {
    margin: 0;
  }

  .project-content {
    padding: 20px;
  }

  .project-title {
    font-size: 1rem;
  }

  .project-description {
    font-size: 0.8rem;
  }
}

/* ===== LOADING ANIMATIONS ===== */
body.loaded {
  animation: fadeIn 0.4s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */
.gallery-item img,
.profile-picture {
  will-change: transform;
}

.project-card,
.gallery-item,
.contact-item {
  will-change: transform;
}

/* ===== SELECTION STYLING ===== */
::selection {
  background: rgba(59, 130, 246, 0.3);
  color: var(--text-primary);
}

/* ===== SCROLLBAR STYLING ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-blue);
}

/* ===== LINK FOCUS STATES FOR ACCESSIBILITY ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}