/* ============================================
   Markus Design Portfolio — Main Stylesheet
   ============================================ */

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #0a0a0a;
  --color-surface: #141414;
  --color-surface-2: #1e1e1e;
  --color-border: #2a2a2a;
  --color-text: #e8e8e8;
  --color-text-muted: #888;
  --color-accent: #c9a84c;
  --color-accent-hover: #dfc06a;
  --color-white: #ffffff;
  --font-heading: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --max-width: 1200px;
  --nav-height: 70px;
  --transition: 0.3s ease;
}

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

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

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

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  z-index: 1000;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.95);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(10px);
}

.nav-brand {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 1px;
}

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

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

.nav-links a {
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  position: relative;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

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

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
}

.lang-toggle {
  background: transparent;
  border: 1.5px solid var(--color-accent);
  color: var(--color-accent);
  padding: 6px 16px;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 2px;
  transition: all var(--transition);
}

.lang-toggle:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    #0a0a0a 0%,
    #1a1a2e 30%,
    #16213e 60%,
    #0a0a0a 100%
  );
  z-index: 0;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at 50% 50%,
    rgba(201, 168, 76, 0.08) 0%,
    transparent 70%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 2rem;
}

.hero-content h1 {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.8rem;
  letter-spacing: 2px;
  line-height: 1.2;
}

.hero-content .subtitle {
  font-size: 1.2rem;
  color: var(--color-accent);
  margin-bottom: 2rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 300;
}

.hero-content .intro-text {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  line-height: 1.8;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 36px;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(201, 168, 76, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: var(--color-bg);
  transform: translateY(-2px);
}

/* --- Section Base --- */
.section {
  padding: 6rem 2rem;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  color: var(--color-white);
  letter-spacing: 1px;
}

.section-title::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  margin: 1rem auto 0;
}

/* --- Portfolio Page --- */
.portfolio-header {
  text-align: center;
  padding: 8rem 2rem 3rem;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem 6rem;
}

.portfolio-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 2.5rem;
  transition: all var(--transition);
}

.portfolio-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.portfolio-card h3 {
  font-size: 1.3rem;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.info-row {
  display: flex;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--color-border);
}

.info-row:last-child {
  border-bottom: none;
}

.info-label {
  min-width: 140px;
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.info-value {
  color: var(--color-text);
  font-size: 0.95rem;
}

.info-value a {
  color: var(--color-accent);
}

/* Education timeline */
.edu-item {
  padding: 1.2rem 0;
  border-left: 2px solid var(--color-accent);
  padding-left: 1.5rem;
  margin-left: 0.5rem;
  position: relative;
}

.edu-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 1.6rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
}

.edu-item .period {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 0.3rem;
}

.edu-item .school {
  color: var(--color-text);
  font-size: 0.95rem;
}

/* Language bars */
.lang-item {
  margin-bottom: 1.2rem;
}

.lang-item .lang-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.lang-item .lang-name {
  font-weight: 600;
  color: var(--color-text);
}

.lang-item .lang-level {
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.lang-bar {
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
}

.lang-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
  border-radius: 3px;
  width: 95%;
  transition: width 1s ease;
}

/* Interests */
.interest-item {
  display: flex;
  align-items: center;
  padding: 0.8rem 0;
  gap: 1rem;
}

.interest-icon {
  font-size: 1.4rem;
  min-width: 40px;
  text-align: center;
}

.interest-label {
  font-weight: 600;
  color: var(--color-text);
  min-width: 80px;
}

.interest-value {
  color: var(--color-text-muted);
}

/* --- Art Gallery --- */
.art-header {
  text-align: center;
  padding: 8rem 2rem 2rem;
}

.art-header .section-subtitle {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 1.5rem auto 0;
}

/* Chapters */
.chapter {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem 4rem;
}

.chapter-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.chapter-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 1rem;
  letter-spacing: 0.5px;
}

.chapter-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  max-width: 800px;
}

.chapter-closing {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.chapter-closing p {
  color: var(--color-accent);
  font-size: 1rem;
  font-style: italic;
  line-height: 1.8;
}

.chapter-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.art-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
}

.art-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.art-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.art-card .art-info {
  padding: 1.2rem 1.4rem;
}

.art-card .art-title {
  font-weight: 600;
  color: var(--color-white);
  font-size: 0.95rem;
}

.art-card .art-date {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  margin-top: 0.3rem;
}

.art-card .art-desc {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: 0.8rem;
  line-height: 1.7;
}

/* --- Lightbox --- */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  cursor: pointer;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  cursor: default;
}

.lightbox-content img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 4px;
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 2rem;
  cursor: pointer;
}

.lightbox-caption {
  text-align: center;
  color: var(--color-text-muted);
  margin-top: 1rem;
  font-size: 0.9rem;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem;
  text-align: center;
}

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

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

/* --- Responsive --- */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-surface);
    flex-direction: column;
    padding: 6rem 2rem 2rem;
    gap: 1.5rem;
    transition: right var(--transition);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.3);
  }

  .nav-links.open {
    right: 0;
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }

  .hero-content .subtitle {
    font-size: 0.95rem;
    letter-spacing: 2px;
  }

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

  .info-row {
    flex-direction: column;
    gap: 0.3rem;
  }

  .info-label {
    min-width: auto;
  }

  .chapter-gallery {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.8rem;
  }

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

  .portfolio-card {
    padding: 1.5rem;
  }
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.8s ease forwards;
}

.fade-in-delay-1 {
  animation: fadeInUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.fade-in-delay-2 {
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.fade-in-delay-3 {
  animation: fadeInUp 0.8s ease 0.6s forwards;
  opacity: 0;
}