/* =========================================================
   Efe Günlühan — Kişisel Tanıtım Sitesi
   Koyu tema, minimalist, teknoloji odaklı tasarım sistemi
   ========================================================= */

:root {
  /* Renk paleti */
  --bg-base: #0a0a0c;
  --bg-elevated: #121216;
  --bg-card: #17171c;
  --bg-card-hover: #1d1d24;
  --border-subtle: #26262e;
  --border-strong: #34343f;

  --text-primary: #f5f5f7;
  --text-secondary: #a6a6b3;
  --text-muted: #6f6f7d;

  --accent: #7c5cff;
  --accent-soft: #7c5cff1a;
  --accent-hover: #9276ff;
  --accent-gradient: linear-gradient(135deg, #7c5cff 0%, #4f9dff 100%);

  --success: #3ddc97;
  --danger: #ff6b6b;

  /* Tipografi */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* Ölçüler */
  --container-w: 1120px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;

  --shadow-soft: 0 10px 30px -12px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 0 1px var(--border-subtle), 0 20px 40px -20px rgba(124, 92, 255, 0.25);

  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

section { position: relative; padding: var(--space-6) 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(124, 92, 255, 0.35);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: var(--space-2);
}

h1, h2, h3, h4 {
  font-weight: 650;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-2);
  color: var(--text-primary);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.08; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); line-height: 1.15; }
h3 { font-size: 1.25rem; }

p { color: var(--text-secondary); margin: 0 0 var(--space-2); }

.section-head {
  max-width: 640px;
  margin: 0 auto var(--space-5);
  text-align: center;
}
.section-head p { margin-bottom: 0; }

/* -------------------- Buttons -------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent-gradient);
  color: #0a0a0c;
  box-shadow: 0 8px 24px -8px rgba(124, 92, 255, 0.55);
}
.btn-primary:hover { filter: brightness(1.08); box-shadow: 0 10px 28px -6px rgba(124, 92, 255, 0.7); }

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-strong);
}
.btn-outline:hover { border-color: var(--accent); background: var(--accent-soft); }

.btn-block { width: 100%; }

/* -------------------- Header / Nav -------------------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(10, 10, 12, 0.72);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}
.site-header.is-scrolled {
  border-bottom-color: var(--border-subtle);
  background: rgba(10, 10, 12, 0.92);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-gradient); box-shadow: 0 0 12px var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }

.nav-actions { display: flex; align-items: center; gap: var(--space-2); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* -------------------- Hero -------------------- */
.hero {
  padding-top: calc(var(--space-6) + 56px);
  padding-bottom: var(--space-6);
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  top: -10%; right: -10%;
  width: 560px; height: 560px;
  background: radial-gradient(circle, rgba(124, 92, 255, 0.28) 0%, transparent 70%);
  filter: blur(20px);
  pointer-events: none;
  z-index: 0;
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-5);
  align-items: center;
}
.hero-text .lede { font-size: 1.1rem; max-width: 520px; }
.hero-actions { display: flex; gap: var(--space-2); margin-top: var(--space-3); flex-wrap: wrap; }

.hero-meta {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}
.hero-meta div strong { display: block; font-size: 1.4rem; color: var(--text-primary); }
.hero-meta div span { font-size: 0.82rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

.hero-portrait {
  position: relative;
  aspect-ratio: 1 / 1.05;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}
.hero-portrait img { width: 100%; height: 100%; object-fit: cover; }
.hero-portrait .placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
  padding: var(--space-3);
  background:
    linear-gradient(135deg, rgba(124,92,255,0.12), transparent 60%),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.02) 0 2px, transparent 2px 12px);
}

/* -------------------- Logos / trust strip -------------------- */
.trust-strip {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: center;
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
}

/* -------------------- Cards / grids -------------------- */
.grid {
  display: grid;
  gap: var(--space-3);
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
}

.card-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: var(--space-2);
  font-size: 1.3rem;
}

/* -------------------- About -------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-5);
  align-items: start;
}
.about-list { list-style: none; margin: var(--space-3) 0 0; padding: 0; display: grid; gap: 12px; }
.about-list li { display: flex; gap: 10px; color: var(--text-secondary); font-size: 0.95rem; }
.about-list li::before { content: "→"; color: var(--accent); flex-shrink: 0; }

.focus-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: var(--space-3); }
.focus-tags span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

/* -------------------- Portfolio -------------------- */
.project-card { display: flex; flex-direction: column; height: 100%; }
.project-tag {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: var(--space-2);
}
.project-card p { flex-grow: 1; }
.project-links { display: flex; gap: 14px; margin-top: var(--space-2); font-size: 0.85rem; }
.project-links a { color: var(--text-primary); border-bottom: 1px solid var(--border-strong); }
.project-links a:hover { color: var(--accent); border-color: var(--accent); }

/* -------------------- Testimonials -------------------- */
.testimonial-card blockquote {
  margin: 0 0 var(--space-2);
  color: var(--text-primary);
  font-size: 1.02rem;
  line-height: 1.6;
}
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--accent-gradient);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem; color: #0a0a0c;
}
.testimonial-author strong { display: block; font-size: 0.9rem; }
.testimonial-author span { font-size: 0.8rem; color: var(--text-muted); }

/* -------------------- Contact -------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--space-5);
  align-items: start;
}
.contact-info-list { list-style: none; margin: var(--space-3) 0 0; padding: 0; display: grid; gap: var(--space-2); }
.contact-info-list li {
  display: flex; align-items: center; gap: 12px;
  padding: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}
.contact-info-list li strong { display: block; font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.contact-info-list li span, .contact-info-list li a { color: var(--text-primary); font-size: 0.95rem; }

.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.form-row { margin-bottom: var(--space-2); }
.form-row.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); }
.form-row label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-row input,
.form-row textarea {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-row textarea { resize: vertical; min-height: 130px; }
.form-honeypot { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; overflow: hidden; }

.form-status {
  margin-top: var(--space-2);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
}
.form-status.is-success { display: block; background: rgba(61, 220, 151, 0.12); border: 1px solid rgba(61, 220, 151, 0.4); color: var(--success); }
.form-status.is-error { display: block; background: rgba(255, 107, 107, 0.12); border: 1px solid rgba(255, 107, 107, 0.4); color: var(--danger); }

/* -------------------- Footer -------------------- */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-4) 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.footer-social { display: flex; gap: var(--space-2); }
.footer-social a {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: border-color var(--transition), color var(--transition);
  font-size: 0.85rem;
}
.footer-social a:hover { border-color: var(--accent); color: var(--accent); }
.footer-note { color: var(--text-muted); font-size: 0.85rem; }

/* -------------------- Reveal animation -------------------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 700ms ease, transform 700ms ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* -------------------- Responsive -------------------- */
@media (max-width: 900px) {
  .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-portrait { max-width: 360px; margin: 0 auto; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav-links, .nav-actions .btn-outline { display: none; }
  .nav-toggle { display: flex; }
  .nav.is-open .nav-links {
    display: flex;
    position: absolute;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-subtle);
    padding: var(--space-3);
  }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .form-row.two-col { grid-template-columns: 1fr; }
  section { padding: var(--space-5) 0; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}