/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scrollbar-width: thin;
  scrollbar-color: rgba(156, 111, 95, 0.5) rgba(27, 20, 18, 0.3);
}

:root {
  /* Color Palette inspired by Video 1 & Video 2 */
  --bg-dark: #120c0a;         /* Deep rich dark brown/black background */
  --bg-dark-rgb: 18, 12, 10;
  
  --panel-bg: rgba(27, 20, 18, 0.65); /* Glassmorphic dark panel */
  --panel-border: rgba(156, 111, 95, 0.2); /* Soft bronze/copper border */
  
  --accent-gold: #c87855;     /* Glowing orange/copper from Video 2 cables */
  --accent-gold-rgb: 200, 120, 85;
  
  --accent-soft: #9c6f5f;     /* Muted copper/tan */
  --text-light: #ece6e2;      /* Light cream for primary text */
  --text-muted: #a7968e;      /* Muted beige-grey for secondary text */
  
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Outfit', sans-serif;
  --transition-smooth: all 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}

body {
  background-color: var(--bg-dark);
  color: var(--text-light);
  font-family: var(--font-body);
  overflow-x: hidden;
  height: 1000vh; /* Scroll height */
  line-height: 1.6;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: rgba(156, 111, 95, 0.3);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-gold);
}

/* Background Canvas Container */
.canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  overflow: hidden;
  background-color: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

#video-canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Dark Vignette to overlay video edges and enhance contrast */
.vignette {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    circle at center,
    rgba(var(--bg-dark-rgb), 0.2) 0%,
    rgba(var(--bg-dark-rgb), 0.5) 50%,
    rgba(var(--bg-dark-rgb), 0.95) 100%
  );
  pointer-events: none;
}

/* Loader Screen */
#loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--bg-dark);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease, visibility 0.8s;
}

.loader-content {
  text-align: center;
  max-width: 500px;
  width: 90%;
  padding: 20px;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--text-light);
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-light) 30%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.loader-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-bottom: 40px;
}

.progress-bar-container {
  width: 100%;
  height: 3px;
  background: rgba(156, 111, 95, 0.15);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 12px;
}

.progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-soft), var(--accent-gold));
  border-radius: 10px;
  transition: width 0.1s ease;
}

.progress-text {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent-gold);
  margin-bottom: 8px;
}

.loader-status {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Glassmorphism General Card Styling */
.glass-card {
  background: var(--panel-bg);
  backdrop-filter: blur(16px) saturate(120%);
  -webkit-backdrop-filter: blur(16px) saturate(120%);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 35px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5),
              inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: var(--transition-smooth);
}

.glass-card:hover {
  border-color: rgba(var(--accent-gold-rgb), 0.4);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6),
              0 0 30px rgba(var(--accent-gold-rgb), 0.08);
}

/* Header Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 40px;
  z-index: 100;
  background: linear-gradient(to bottom, rgba(var(--bg-dark-rgb), 0.85) 0%, rgba(var(--bg-dark-rgb), 0) 100%);
  pointer-events: none; /* Let clicks pass through empty spaces */
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 2px;
  pointer-events: auto;
}

.nav-links {
  display: flex;
  gap: 25px;
  pointer-events: auto;
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 6px;
  pointer-events: auto;
}

.lang-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  padding: 4px 10px;
  transition: var(--transition-smooth);
  border-radius: 6px;
}

.lang-btn:hover {
  color: var(--text-light);
}

.lang-btn.active {
  background: rgba(var(--accent-gold-rgb), 0.15);
  color: var(--accent-gold);
  border-color: rgba(var(--accent-gold-rgb), 0.3);
}

.lang-divider {
  color: rgba(156, 111, 95, 0.25);
  font-size: 0.8rem;
  user-select: none;
}

.nav-item {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: var(--transition-smooth);
  position: relative;
  padding: 5px 0;
}

.nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-gold);
  transition: var(--transition-smooth);
}

.nav-item:hover, .nav-item.active {
  color: var(--text-light);
}

.nav-item.active::after {
  width: 100%;
}

/* Right Interactive Timeline Indicator */
.timeline-indicator {
  position: fixed;
  right: 40px;
  top: 50%;
  transform: translateY(-50%);
  height: 350px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.timeline-indicator .line {
  position: relative;
  width: 2px;
  height: 100%;
  background: rgba(156, 111, 95, 0.15);
}

.progress-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: var(--accent-gold);
  box-shadow: 0 0 10px rgba(var(--accent-gold-rgb), 0.5);
  transition: height 0.1s ease;
}

.marker {
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 100px; /* click target area vertical */
  cursor: pointer;
}

.marker::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  background: var(--bg-dark);
  border: 2px solid var(--accent-soft);
  border-radius: 50%;
  transition: var(--transition-smooth);
}

.marker:hover::after, .marker.active::after {
  border-color: var(--accent-gold);
  background: var(--accent-gold);
  transform: translate(-50%, -50%) scale(1.3);
  box-shadow: 0 0 12px rgba(var(--accent-gold-rgb), 0.8);
}

.m1 { top: 0%; }
.m2 { top: 15%; }
.m3 { top: 25%; }
.m4 { top: 35%; }
.m5 { top: 45%; }
.m6 { top: 55%; }
.m7 { top: 64%; }
.m8 { top: 74%; }
.m9 { top: 84%; }
.m10 { top: 100%; }

/* Scroll Containers & Floating Cards Layout */
#scroll-container {
  width: 100%;
  height: 100%;
  position: relative;
}

.scroll-scene {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  width: 90%;
  max-width: 820px;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 5;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.6s cubic-bezier(0.25, 1, 0.5, 1),
              transform 0.6s cubic-bezier(0.25, 1, 0.5, 1),
              visibility 0.6s;
}

.scroll-scene.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}

/* Scroll Prompt Only Style */
.scroll-prompt-only {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: bounce 2s infinite;
  pointer-events: none;
}

.mouse-icon {
  width: 20px;
  height: 32px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.mouse-icon .wheel {
  width: 4px;
  height: 8px;
  background-color: var(--accent-gold);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollWheel 1.5s infinite;
}

@keyframes scrollWheel {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(8px); }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-8px); }
  60% { transform: translateY(-4px); }
}

/* CV Card Details Styling */
.cv-card {
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  scrollbar-width: thin;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 25px;
  border-bottom: 1px solid rgba(156, 111, 95, 0.15);
  padding-bottom: 15px;
}

.card-num {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(var(--accent-gold-rgb), 0.15);
  line-height: 1;
}

.card-header h2 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 1px;
}

.card-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  text-align: justify;
}

/* Education Item */
.education-item, .experience-item {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.edu-title, .exp-role {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--text-light);
  font-weight: 700;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.badge-award {
  font-size: 0.7rem;
  background: linear-gradient(135deg, rgba(var(--accent-gold-rgb), 0.2), rgba(var(--accent-gold-rgb), 0.05));
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  padding: 4px 10px;
  border-radius: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.edu-meta, .exp-meta {
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.edu-meta i, .exp-meta i {
  color: var(--accent-gold);
}

.edu-date, .exp-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.edu-date i, .exp-date i {
  color: var(--accent-soft);
}

.semester-honors {
  margin-top: 15px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 12px;
  padding: 15px;
}

.semester-honors h4 {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 12px;
  font-weight: 600;
}

.honors-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.honor-tag {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.honor-tag i {
  color: var(--accent-gold);
  font-size: 0.85rem;
}

/* Experience Description */
.exp-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: justify;
  margin-top: 5px;
}

/* Nested Items (Stajlar & Yarışmalar) */
.timeline-nested, .competition-nested {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.nested-item {
  position: relative;
  padding-left: 20px;
  border-left: 2px solid rgba(156, 111, 95, 0.2);
}

.nested-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 6px;
  width: 10px;
  height: 10px;
  background: var(--bg-dark);
  border: 2px solid var(--accent-gold);
  border-radius: 50%;
  transition: var(--transition-smooth);
}

.nested-item:hover::before {
  background: var(--accent-gold);
  box-shadow: 0 0 8px var(--accent-gold);
}

.nested-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--text-light);
  font-weight: 600;
  margin-bottom: 4px;
}

.nested-meta {
  font-size: 0.8rem;
  color: var(--accent-soft);
  font-weight: 500;
  margin-bottom: 10px;
}

.nested-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: justify;
}

/* Project Item */
.project-item {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.project-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--text-light);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.project-meta {
  font-size: 0.9rem;
  color: var(--accent-gold);
  font-weight: 600;
}

.project-tech {
  font-size: 0.85rem;
  color: var(--text-muted);
  background: rgba(0,0,0,0.2);
  padding: 8px 15px;
  border-radius: 8px;
  border-left: 3px solid var(--accent-soft);
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: justify;
}

.project-role {
  font-size: 0.88rem;
  color: var(--text-light);
}

/* References Grid */
.references-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
}

.reference-box {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(156, 111, 95, 0.1);
  border-radius: 15px;
  padding: 20px;
  transition: var(--transition-smooth);
}

.reference-box:hover {
  border-color: rgba(var(--accent-gold-rgb), 0.3);
  background: rgba(0, 0, 0, 0.35);
  transform: translateY(-3px);
}

.ref-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--text-light);
  font-weight: 700;
  margin-bottom: 4px;
}

.ref-title {
  font-size: 0.8rem;
  color: var(--accent-gold);
  font-weight: 500;
  margin-bottom: 2px;
}

.ref-inst {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.ref-email {
  font-size: 0.78rem;
  color: var(--accent-soft);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-smooth);
}

.ref-email:hover {
  color: var(--accent-gold);
}

/* Certificates Card */
.certificates-card {
  max-width: 900px;
}

.certificates-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
}

.cert-item {
  display: flex;
  gap: 15px;
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(156, 111, 95, 0.08);
  border-radius: 12px;
  padding: 15px;
  transition: var(--transition-smooth);
}

.cert-item:hover {
  border-color: rgba(var(--accent-gold-rgb), 0.25);
  background: rgba(0, 0, 0, 0.25);
  transform: translateY(-2px);
}

.cert-icon {
  width: 40px;
  height: 40px;
  background: rgba(var(--accent-gold-rgb), 0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-gold);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.cert-info h4 {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-light);
  line-height: 1.3;
  margin-bottom: 4px;
}

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

/* Contact Card (Section 9) Styles */
.contact-card-main {
  max-width: 820px;
}

.contact-section-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 45px;
}

.contact-info-block {
  display: flex;
  flex-direction: column;
  gap: 20px;
  justify-content: center;
}

.contact-info-block h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--text-light);
  font-weight: 600;
  margin-bottom: 8px;
}

.contact-detail-item {
  font-size: 0.95rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 15px;
  background: rgba(0, 0, 0, 0.2);
  padding: 18px;
  border-radius: 12px;
  border: 1px solid rgba(156, 111, 95, 0.1);
  transition: var(--transition-smooth);
}

.contact-detail-item:hover {
  border-color: rgba(var(--accent-gold-rgb), 0.25);
  transform: translateY(-2px);
}

.contact-detail-item i {
  font-size: 1.3rem;
  color: var(--accent-gold);
  background: rgba(var(--accent-gold-rgb), 0.1);
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-light);
  letter-spacing: 0.5px;
}

.form-group input, .form-group textarea {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(156, 111, 95, 0.15);
  border-radius: 10px;
  padding: 12px 15px;
  color: var(--text-light);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: var(--transition-smooth);
  outline: none;
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent-gold);
  background: rgba(0, 0, 0, 0.4);
  box-shadow: 0 0 10px rgba(var(--accent-gold-rgb), 0.15);
}

.btn-submit {
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-gold));
  border: none;
  border-radius: 10px;
  padding: 14px;
  color: #fff;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition-smooth);
  box-shadow: 0 5px 15px rgba(var(--accent-gold-rgb), 0.2);
  margin-top: 5px;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(var(--accent-gold-rgb), 0.35);
  filter: brightness(1.1);
}

.contact-actions-wrapper {
  display: flex;
  gap: 12px;
  margin-top: 15px;
  width: 100%;
}

.contact-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 15px;
  border-radius: 10px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.linkedin-btn {
  background: rgba(10, 102, 194, 0.1);
  border: 1px solid rgba(10, 102, 194, 0.25);
  color: #0077b5;
}

.linkedin-btn:hover {
  background: #0077b5;
  color: #fff;
  border-color: #0077b5;
  box-shadow: 0 5px 15px rgba(0, 119, 181, 0.35);
  transform: translateY(-2px);
}

.cv-btn {
  background: rgba(var(--accent-gold-rgb), 0.1);
  border: 1px solid rgba(var(--accent-gold-rgb), 0.25);
  color: var(--accent-gold);
}

.cv-btn:hover {
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-gold));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 5px 15px rgba(var(--accent-gold-rgb), 0.35);
  transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 992px) {
  /* Keep scroll animation active but adjust positions for mobile screens */
  
  .navbar {
    padding: 0 20px;
    height: 60px;
  }

  .nav-logo {
    font-size: 1.25rem;
  }

  .nav-links {
    display: none; /* Hide top menu links to prevent clutter on mobile */
  }

  .timeline-indicator {
    display: none; /* Hide timeline indicator on mobile */
  }

  .scroll-scene {
    position: fixed;
    top: 55%; /* Centered in mobile viewport */
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    width: 92%;
    max-width: 480px;
    margin: 0;
  }

  .scroll-scene.active {
    transform: translate(-50%, -50%) scale(1);
  }

  .cv-card {
    padding: 22px;
    max-height: 70vh; /* Shorter card max height to fit smaller screens */
  }

  .card-header {
    margin-bottom: 18px;
    padding-bottom: 10px;
  }

  .card-header h2 {
    font-size: 1.35rem;
  }

  .card-num {
    font-size: 1.8rem;
  }

  .card-text {
    font-size: 0.88rem;
  }

  .edu-title, .exp-role {
    font-size: 1.05rem;
  }

  .honors-grid, .certificates-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .honor-tag {
    font-size: 0.72rem;
  }

  .cert-item {
    padding: 10px;
    gap: 10px;
  }

  .cert-icon {
    width: 32px;
    height: 32px;
    font-size: 0.95rem;
  }

  .cert-info h4 {
    font-size: 0.78rem;
  }

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

  .nested-text, .project-desc, .exp-desc {
    font-size: 0.82rem;
  }

  .references-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .reference-box {
    padding: 15px;
  }

  .contact-section-content {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .contact-detail-item {
    padding: 12px;
    font-size: 0.85rem;
  }

  .contact-detail-item i {
    width: 32px;
    height: 32px;
    font-size: 1rem;
  }

  .form-group input, .form-group textarea {
    padding: 10px 12px;
    font-size: 0.85rem;
  }

  .btn-submit {
    padding: 12px;
    font-size: 0.88rem;
  }
}