/* ═══════════════════════════════════════════
   TOKENS
═══════════════════════════════════════════ */
:root {
  --accent: #00ff88;
  --bg: #0d0d0d;
  --bg-alt: #111;
  --bg-card: #141414;
  --border: rgba(255,255,255,0.07);
  --text: #e0e0e0;
  --text-muted: #555;
  --text-dim: #333;
  --nav-h: 60px;
  --font-mono: 'Courier New', monospace;
  --font-sans: system-ui, -apple-system, sans-serif;
  --radius: 8px;
  --transition: 0.25s ease;
}

[data-theme="light"] {
  --accent: #0066ff;
  --bg: #f5f5f0;
  --bg-alt: #ebebeb;
  --bg-card: #ffffff;
  --border: rgba(0,0,0,0.08);
  --text: #111;
  --text-muted: #888;
  --text-dim: #ccc;
}

/* ═══════════════════════════════════════════
   RESET & BASE
═══════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
  position: relative;
}

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

/* ═══════════════════════════════════════════
   NAVBAR
═══════════════════════════════════════════ */
#navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h); z-index: 300;
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

#navbar.scrolled {
  background: rgba(13,13,13,0.85);
  border-color: var(--border);
  backdrop-filter: blur(12px);
}

[data-theme="light"] #navbar.scrolled {
  background: rgba(245,245,240,0.9);
}

.nav-inner {
  max-width: 1000px; margin: 0 auto;
  height: 100%;
  display: flex; align-items: center;
  padding: 0 24px; gap: 32px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 18px; font-weight: 700;
  color: var(--text);
  margin-right: auto;
}

.nav-links {
  display: flex; gap: 28px;
}

.nav-links a {
  font-size: 13px; color: var(--text-muted);
  letter-spacing: 0.5px;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute; bottom: -2px; left: 0; right: 0;
  height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition);
}

.nav-links a:hover,
.nav-links a.active { color: var(--accent); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }

.nav-controls { display: flex; gap: 10px; align-items: center; }

.lang-btn, .theme-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px; font-family: var(--font-mono);
  padding: 4px 10px; border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-btn:hover, .theme-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-icon { font-size: 14px; }

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

/* bg: en altta, sayfa boyunca uzanir */
#bgCanvas {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none; z-index: 0;
}

/* binary trail: fixed, section bg üstünde ama içerik altında */
#binaryCanvas {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none; z-index: 5;
}

/* scroll path: sol kenarda */
#pathCanvas {
  position: absolute; top: 0; left: 0;
  width: 60px; height: 100%;
  pointer-events: none; z-index: 2;
}

.hero-content {
  position: relative; z-index: 20;
  max-width: 1000px; margin: 0 auto;
  padding: 0 24px 0 72px;
  padding-top: var(--nav-h);
}

.hero-prompt {
  font-family: var(--font-mono);
  font-size: 13px; color: var(--accent);
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 2px;
}

.typed-cursor {
  animation: blink 1s step-end infinite;
  color: var(--accent);
}

@keyframes blink { 50% { opacity: 0; } }

.hero-name {
  font-size: clamp(48px, 8vw, 82px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -2px;
  color: var(--text);
  font-family: var(--font-sans);
  margin-bottom: 12px;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: 15px; color: var(--text-muted);
  margin-bottom: 36px;
}

.hero-btns {
  display: flex; gap: 14px; flex-wrap: wrap;
  margin-bottom: 28px;
}

.btn-primary {
  display: inline-block;
  padding: 11px 26px;
  background: var(--accent); color: #0d0d0d;
  font-size: 13px; font-weight: 700;
  font-family: var(--font-mono);
  border-radius: var(--radius);
  transition: all var(--transition);
  letter-spacing: 0.5px;
  position: relative; z-index: 30;
}

.btn-primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.btn-ghost {
  display: inline-block;
  padding: 11px 26px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px; font-family: var(--font-mono);
  border-radius: var(--radius);
  transition: all var(--transition);
  position: relative; z-index: 30;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.is-disabled {
  opacity: 0.6;
  cursor: pointer;
}

.is-disabled:hover {
  opacity: 0.45;
  transform: none;
  border-color: var(--border);
  color: var(--text-muted);
}

.hero-status {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--text-muted);
  font-family: var(--font-mono);
}

.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%; background: #ff3b3b;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.scroll-hint {
  position: absolute; bottom: 32px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center;
  gap: 6px; z-index: 2;
  font-size: 10px; letter-spacing: 3px;
  text-transform: uppercase; color: var(--text-dim);
  font-family: var(--font-mono);
  animation: fadeInUp 1s ease 2s both;
}

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

@keyframes scrollPulse {
  0%,100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.1); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translate(-50%, 10px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* ═══════════════════════════════════════════
   SECTIONS
═══════════════════════════════════════════ */
.section { padding: 100px 0; position: relative; z-index: 20; }
.section-alt {
  background: transparent;
  position: relative;
}
/* Arka plan pseudo-element ile — binary canvas arkasında kalır */
.section-alt::before {
  content: "";
  position: absolute; inset: 0;
  background: rgba(17,17,17,0.85);
  backdrop-filter: blur(8px);
  z-index: 3;  /* bgCanvas(0) ve pathCanvas(2) üstünde, binaryCanvas(5) altında — yarı şeffaf, pathCanvas siluet olarak görünür */
}

[data-theme="light"] .section-alt::before {
  background: rgba(235,235,235,0.55);
}
/* section içeriği canvas üstünde */
.section-alt .container {
  position: relative;
  z-index: 25;
}
.container { max-width: 1000px; margin: 0 auto; padding: 0 24px 0 72px; }

.section-title {
  font-size: 28px; font-weight: 700;
  font-family: var(--font-mono);
  margin-bottom: 48px;
  display: flex; align-items: center; gap: 12px;
}

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

/* Scroll reveal */
.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* Typewriter reveal — başlıklar için */
.tw-reveal {
  overflow: hidden;
  white-space: nowrap;
  border-right: 2px solid var(--accent);
  width: 0;
  opacity: 1 !important;
  transform: none !important;
}
.tw-reveal.tw-done {
  border-right: none;
  white-space: normal;
}

/* Staggered card reveal */
.project-card.reveal { transition-delay: calc(var(--i, 0) * 0.1s); }
.skill-group.reveal  { transition-delay: calc(var(--i, 0) * 0.12s); }

/* ═══════════════════════════════════════════
   ABOUT
═══════════════════════════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: 56px; align-items: start;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 15px;
}

.about-tags {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-top: 24px;
}

.tag {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px; color: var(--text-muted);
  transition: border-color var(--transition), color var(--transition);
}

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

.profile-photo {
  width: 180px; height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  transition: border-color var(--transition);
  display: block;
}

.profile-photo:hover { border-color: var(--accent); }

/* ═══════════════════════════════════════════
   SKILLS
═══════════════════════════════════════════ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}

.skill-group h3 {
  font-family: var(--font-mono);
  font-size: 13px; color: var(--accent);
  letter-spacing: 2px; text-transform: uppercase;
  margin-bottom: 20px;
}

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

.stag {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 12px; font-family: var(--font-mono);
  color: var(--text-muted);
  transition: all var(--transition);
}

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

.stag.learning {
  border-color: rgba(0,255,136,0.25);
  color: var(--accent);
  opacity: 0.7;
}

[data-theme="light"] .stag.learning {
  border-color: rgba(0,102,255,0.3);
}

/* ═══════════════════════════════════════════
   PROJECTS
═══════════════════════════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition), transform var(--transition);
  display: flex; flex-direction: column; gap: 10px;
  position: relative;
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.project-top {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 4px;
}

.project-icon { font-size: 24px; }

.project-link {
  color: var(--text-muted);
  transition: color var(--transition);
  display: flex; align-items: center;
}

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

.project-name {
  font-size: 16px; font-weight: 700;
  color: var(--text);
}

.project-top-right {
  display: flex; align-items: center; gap: 12px;
}

.project-grade-badge {
  font-size: 11px; font-family: var(--font-mono); font-weight: 700;
  color: #00ff88;
  background: rgba(0,255,136,0.1);
  border: 1px solid rgba(0,255,136,0.3);
  padding: 2px 8px; border-radius: 3px;
  white-space: nowrap;
}

.project-desc {
  font-size: 13px; color: var(--text-muted);
  line-height: 1.65; flex: 1;
}

.project-tech {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-top: 4px;
}

.project-tech span {
  font-size: 11px; font-family: var(--font-mono);
  color: var(--accent);
  background: rgba(0,255,136,0.06);
  padding: 2px 8px; border-radius: 3px;
}

[data-theme="light"] .project-tech span {
  background: rgba(0,102,255,0.06);
}

/* ═══════════════════════════════════════════
   CONTACT
═══════════════════════════════════════════ */
.contact-container { text-align: center; }

.contact-sub {
  color: var(--text-muted); font-size: 15px;
  max-width: 440px; margin: -24px auto 36px;
}

.contact-links {
  display: flex; flex-direction: column;
  gap: 12px; max-width: 380px; margin: 0 auto 28px;
}

.contact-card {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px; color: var(--text-muted);
  transition: all var(--transition);
  text-align: left;
}

.contact-card:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateX(4px);
}

.contact-icon {
  font-size: 16px; font-weight: 700;
  color: var(--accent); flex-shrink: 0;
  display: flex; align-items: center;
}

.cv-btn { font-family: var(--font-mono); font-size: 13px; }

/* ═══════════════════════════════════════════
   CV NOTICE POPUP
═══════════════════════════════════════════ */
.cv-notice-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: opacity var(--transition);
}

.cv-notice-overlay.show {
  opacity: 1; visibility: visible;
}

.cv-notice-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 360px;
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 16px;
  transform: translateY(10px);
  transition: transform var(--transition);
}

.cv-notice-overlay.show .cv-notice-box {
  transform: translateY(0);
}

.cv-notice-icon { font-size: 32px; }

.cv-notice-box p {
  font-size: 14px; color: var(--text); line-height: 1.6;
}

/* ═══════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════ */
footer {
  padding: 28px 24px;
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--border);
  font-size: 12px; color: var(--text-dim);
  font-family: var(--font-mono);
  max-width: 1000px; margin: 0 auto;
}

.footer-accent { color: var(--accent); opacity: 0.5; }

/* ═══════════════════════════════════════════
   MOBILE
═══════════════════════════════════════════ */
@media (max-width: 680px) {
  .nav-links { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { order: -1; }
  .profile-photo { width: 120px; height: 120px; }
  .hero-name { letter-spacing: -1px; }
  .skills-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; gap: 8px; text-align: center; }
  #pathCanvas { display: none; }
  .hero-content { padding-left: 24px; }
  .container { padding-left: 24px; }
}

/* ═══════════════════════════════════════════
   REDUCED MOTION
═══════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}