/* ══════════════════════════════
   NAV
══════════════════════════════ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  /* Custom spring transition for more dynamic feel */
  transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  /* Optimization */
  will-change: transform, top, padding;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  contain: layout;
}

#navbar::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--bg-nav);
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  border-radius: inherit;
  transition: inherit;
  pointer-events: none;
  opacity: 0.8; /* Slightly more transparent at top */
}

#navbar.scrolled {
  padding: 12px 0;
  top: 12px;
  left: 12px;
  right: 12px;
  width: calc(100% - 24px);
  max-width: var(--max-width);
  margin: 0 auto;
  border-radius: var(--radius-md);
  border: none;
  box-shadow: 
    0 0 0 1px var(--border),
    0 10px 30px var(--shadow);
}

#navbar.scrolled::before {
  opacity: 0.98; /* Almost fully opaque when scrolled */
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--bg-tag);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
}

.nav-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-tag);
}

.nav-btn.lang-btn {
  width: auto;
  padding: 0 10px;
}

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
}

.nav-hamburger span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  transition: all var(--transition);
}

/* ══════════════════════════════
   HERO
══════════════════════════════ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.4;
  pointer-events: none;
}

.hero-bg-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: -200px;
  right: -100px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeUp 0.7s 0.2s ease forwards;
}

.hero-name {
  opacity: 0;
  animation: fadeUp 0.7s 0.4s ease forwards;
  margin-bottom: 8px;
}

.hero-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--text-secondary);
  opacity: 0;
  animation: fadeUp 0.7s 0.55s ease forwards;
  margin-bottom: 28px;
}

.hero-desc {
  font-size: 1.05rem;
  max-width: 520px;
  line-height: 1.75;
  opacity: 0;
  animation: fadeUp 0.7s 0.7s ease forwards;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.7s 0.85s ease forwards;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: fadeIn 1s 1.2s ease forwards;
}

.hero-scroll-hint span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(0.7); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

/* ══════════════════════════════
   ABOUT  — mobile-first
══════════════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

.about-image-wrap {
  position: relative;
  /* Mobilde resim kompakt + ortalı */
  width: min(220px, 60vw);
  margin: 0 auto;
}

.about-image-wrap::before {
  content: '';
  position: absolute;
  inset: -10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transform: rotate(2deg);
  transition: transform var(--transition);
}

.about-image-wrap:hover::before {
  transform: rotate(0deg);
}

.about-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-lg);
  display: block;
  background: var(--bg-card);
  position: relative;
  z-index: 1;
}

.about-photo-placeholder {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.about-photo-placeholder svg {
  width: 52px;
  height: 52px;
  color: var(--text-muted);
}

.about-text h2 {
  margin-bottom: 20px;
}

.about-text p {
  font-size: 1.02rem;
  line-height: 1.8;
  margin-bottom: 32px;
}

/* ══════════════════════════════
   SKILLS
══════════════════════════════ */
#skills {
  background: var(--bg-secondary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.skill-category {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition);
}

.skill-category:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.skill-category-name {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-tag);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-primary);
  transition: all var(--transition);
}

.skill-item:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ══════════════════════════════
   PROJECTS
══════════════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

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

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px var(--shadow);
}

.project-thumbnail {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: var(--bg-secondary);
  display: block;
}

.project-thumbnail-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.project-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.project-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.project-card p {
  font-size: 0.9rem;
  line-height: 1.65;
  flex: 1;
  margin-bottom: 20px;
}

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

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.project-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Featured project */
.project-card.featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.project-card.featured .project-thumbnail,
.project-card.featured .project-thumbnail-placeholder {
  aspect-ratio: auto;
  height: 100%;
  min-height: 260px;
}

/* ══════════════════════════════
   EXPERIENCE
══════════════════════════════ */
.experience-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.experience-list::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.exp-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 24px;
  padding: 0 0 48px 0;
  position: relative;
}

.exp-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-primary);
  margin-top: 6px;
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  margin-left: 15px;
}

.exp-dot.current {
  box-shadow: 0 0 0 4px var(--accent-glow);
  animation: currentPulse 2s ease-in-out infinite;
}

@keyframes currentPulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--accent-glow); }
  50% { box-shadow: 0 0 0 8px transparent; }
}

.exp-content {
  padding-top: 2px;
}

.exp-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

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

.exp-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  white-space: nowrap;
}

.exp-company {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  margin-bottom: 10px;
}

.exp-desc {
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ══════════════════════════════
   CONTACT
══════════════════════════════ */
#contact {
  background: var(--bg-secondary);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 { margin-bottom: 16px; }
.contact-info p { margin-bottom: 32px; font-size: 1.02rem; line-height: 1.75; }

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-detail-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.contact-detail-item a {
  color: var(--text-secondary);
  transition: color var(--transition);
}

.contact-detail-item a:hover { color: var(--accent); }

.contact-detail-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.contact-socials {
  display: flex;
  gap: 10px;
  margin-top: 32px;
}

.social-link {
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-tag);
}

/* ══════════════════════════════
   FOOTER
══════════════════════════════ */
footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

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

/* ── Contact Chat ── */
.contact-chat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  height: 450px;
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.chat-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.chat-user-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-indicator {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(34, 197, 94, 0.5);
}

#chat-status {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.chat-messages {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Scrollbar styling */
.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }

.chat-msg {
  max-width: 85%;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.msg-bubble {
  padding: 10px 16px;
  border-radius: 16px;
  font-size: 0.9rem;
  line-height: 1.5;
  word-wrap: break-word;
}

.msg-user { align-self: flex-end; }
.msg-user .msg-bubble {
  background: var(--accent);
  color: #000;
  border-bottom-right-radius: 2px;
}
.msg-user .msg-time { text-align: right; }

.msg-admin { align-self: flex-start; }
.msg-admin .msg-bubble {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-bottom-left-radius: 2px;
}

.msg-time {
  font-size: 0.65rem;
  color: var(--text-muted);
  padding: 0 4px;
}

.chat-input-wrap {
  padding: 16px;
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
}

#chat-input {
  flex: 1;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: all var(--transition);
}

#chat-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(200, 240, 74, 0.1);
}

.chat-send-btn {
  background: var(--accent);
  color: #000;
  border: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
}

.chat-send-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--accent-glow);
}

.chat-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  filter: grayscale(1);
}

/* ══════════════════════════════
   RESPONSIVE
══════════════════════════════ */
/* ── Tablet & up: 2 sütunlu layout ── */
@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }

  .about-image-wrap {
    width: 100%;
    margin: 0;
  }

  .about-photo,
  .about-photo-placeholder {
    aspect-ratio: 4 / 5;
  }

  .about-photo-placeholder svg {
    width: 64px;
    height: 64px;
  }

  .contact-grid { grid-template-columns: 1fr 1fr; gap: 64px; }
}

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .project-card.featured { grid-template-columns: 1fr; }
  .project-card.featured .project-thumbnail,
  .project-card.featured .project-thumbnail-placeholder { height: 220px; }
}

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

  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 20px;
    gap: 4px;
  }

  .nav-links.mobile-open a {
    display: block;
    padding: 12px 16px;
    font-size: 0.9rem;
  }

  .hero-actions { flex-direction: column; }
  .hero-actions .btn { text-align: center; justify-content: center; }

  #navbar.scrolled {
    left: 8px;
    right: 8px;
    width: calc(100% - 16px);
  }
}

/* ══════════════════════════════
   BACK TO TOP
   ══════════════════════════════ */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#back-to-top:hover {
  background: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
  box-shadow: 0 8px 24px var(--accent-glow);
  transform: translateY(-4px);
}

@media (max-width: 768px) {
  #back-to-top {
    bottom: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
  }
}