/* =========================================================
   Can Kadılar — portfolio styles
   plain CSS, mobile-first, dark by default with light fallback
   ========================================================= */

:root {
  /* dark theme (default) */
  --bg:        #0d1117;
  --bg-alt:    #11161f;
  --bg-elev:   #161c27;
  --fg:        #e6edf3;
  --fg-muted:  #9aa4b2;
  --fg-dim:    #6b7484;
  --accent:    #2dd4bf;
  --accent-2:  #14b8a6;
  --accent-fg: #0d1117;
  --border:    #1f2733;
  --border-strong: #2a3441;
  --shadow:    0 6px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 14px 40px rgba(0, 0, 0, 0.45);

  --maxw:        72rem;
  --maxw-prose:  46rem;
  --radius:      14px;
  --radius-sm:   10px;
  --pad-x:       clamp(1rem, 3vw, 2rem);

  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", Consolas, "SF Mono", monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:        #ffffff;
    --bg-alt:    #f6f8fa;
    --bg-elev:   #ffffff;
    --fg:        #0d1117;
    --fg-muted:  #4b5563;
    --fg-dim:    #6b7280;
    --accent:    #0d9488;
    --accent-2:  #0f766e;
    --accent-fg: #ffffff;
    --border:    #e5e7eb;
    --border-strong: #d1d5db;
    --shadow:    0 4px 16px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 10px 28px rgba(15, 23, 42, 0.10);
  }
}

/* ------- reset-ish ------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}
code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 0.08em 0.4em;
  border-radius: 5px;
  color: var(--fg);
}
h1, h2, h3 {
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }

/* ------- skip link (a11y) ------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-fg);
  padding: 0.6rem 1rem;
  border-radius: 0 0 8px 0;
  font-weight: 600;
  z-index: 100;
}
.skip-link:focus { left: 0; text-decoration: none; }

/* ------- hero / header ------- */
.hero {
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(45, 212, 191, 0.10), transparent 60%),
    radial-gradient(700px 400px at 10% 0%, rgba(45, 212, 191, 0.06), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0 var(--pad-x);
}
.topnav {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}
.brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  border: 1.5px solid var(--accent);
  border-radius: 8px;
  padding: 0.25rem 0.55rem;
  text-decoration: none;
}
.brand:hover { background: var(--accent); color: var(--accent-fg); text-decoration: none; }
.topnav-links {
  display: flex;
  gap: 1.3rem;
  font-size: 0.95rem;
}
.topnav-links a {
  color: var(--fg-muted);
  text-decoration: none;
}
.topnav-links a:hover { color: var(--fg); }

@media (max-width: 540px) {
  .topnav-links { display: none; }
}

.hero-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3.5rem 0 4.5rem;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 0.75rem;
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 800;
  margin: 0 0 0.75rem;
}
.lede {
  font-size: clamp(1.05rem, 2.2vw, 1.2rem);
  color: var(--fg-muted);
  max-width: var(--maxw-prose);
  margin: 0 0 1.5rem;
}
.lede strong { color: var(--fg); }

.status {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: 0.93rem;
  color: var(--fg-muted);
  margin-bottom: 2rem;
}
.status li { display: flex; align-items: center; gap: 0.5rem; }
.status strong { color: var(--fg); }
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.25);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.25); }
  50%      { box-shadow: 0 0 0 6px rgba(45, 212, 191, 0.05); }
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.btn {
  --btn-bg: var(--bg-elev);
  --btn-fg: var(--fg);
  --btn-border: var(--border-strong);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1.5px solid var(--btn-border);
  border-radius: 10px;
  padding: 0.7rem 1.15rem;
  font-weight: 600;
  font-size: 0.96rem;
  text-decoration: none;
  transition: transform 0.1s ease, border-color 0.15s ease, background 0.15s ease;
}
.btn:hover {
  border-color: var(--accent);
  color: var(--fg);
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-primary {
  --btn-bg: var(--accent);
  --btn-fg: var(--accent-fg);
  --btn-border: var(--accent);
}
.btn-primary:hover {
  --btn-bg: var(--accent-2);
  --btn-border: var(--accent-2);
  color: var(--accent-fg);
}
.btn-ghost {
  --btn-bg: transparent;
}

.proof {
  margin: 0;
  font-size: 0.9rem;
  color: var(--fg-dim);
}
.proof a { color: var(--fg-muted); }
.proof a:hover { color: var(--accent); }

/* ------- sections ------- */
.section {
  padding: 4.5rem var(--pad-x);
  border-bottom: 1px solid var(--border);
}
.section-alt { background: var(--bg-alt); }
.section > * {
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
}
.section h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin: 0 0 1.5rem;
  position: relative;
  padding-left: 1rem;
}
.section h2::before {
  content: "";
  position: absolute;
  left: 0; top: 0.35em;
  width: 4px; height: 0.8em;
  background: var(--accent);
  border-radius: 2px;
}
.section-sub {
  color: var(--fg-muted);
  max-width: var(--maxw-prose);
  margin-top: -0.75rem;
  margin-bottom: 2rem;
}

/* ------- "what I bring" ------- */
.bring-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.bring-grid li {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.25rem 1rem;
  transition: border-color 0.15s ease, transform 0.1s ease;
}
.bring-grid li:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.bring-grid h3 {
  font-size: 1rem;
  color: var(--accent);
  margin: 0 0 0.4rem;
  font-weight: 700;
}
.bring-grid p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--fg-muted);
}

.goal-callout {
  background: var(--bg-elev);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
  color: var(--fg-muted);
  margin: 0;
}
.goal-callout strong { color: var(--fg); }

/* ------- card grid (short demos) ------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.card-media {
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #000;
}
.card-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.card-media:hover img { transform: scale(1.03); }
.card-body {
  padding: 1.25rem 1.25rem 1.4rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-body h3 {
  font-size: 1.15rem;
  margin: 0 0 0.5rem;
  color: var(--fg);
}
.card-body p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  margin: 0 0 0.75rem;
}
.card-meta {
  margin-top: auto;
  font-size: 0.9rem;
}
.card-meta a {
  font-family: var(--font-mono);
  font-weight: 600;
}
.card-textonly .card-body { padding-top: 1.4rem; }

/* ------- projects (long form) ------- */
.project {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: center;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
@media (min-width: 800px) {
  .project { grid-template-columns: 1.1fr 1fr; gap: 2.5rem; padding: 2rem; }
  .project-flip .project-media { order: 2; }
}
.project-media a {
  display: block;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #000;
}
.project-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.project-media a:hover img { transform: scale(1.03); }
.project-body h3 {
  font-size: 1.35rem;
  margin: 0 0 0.5rem;
}
.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  vertical-align: middle;
  margin-left: 0.5rem;
}
.project-body > p { color: var(--fg-muted); }
.project-links {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.94rem;
  margin-top: 1rem;
}
.project-links li::before {
  content: "→ ";
  color: var(--accent);
  font-weight: 700;
}

.extras {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--fg-muted);
}
.extras li { padding: 0.25rem 0; }
.extras strong { color: var(--fg); }

/* ------- tech stack ------- */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin: 0 auto;
}
.stack-grid > div {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
}
.stack-grid dt {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.stack-grid dd {
  margin: 0;
  color: var(--fg);
  font-size: 0.96rem;
}

/* ------- learning ------- */
.learning-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.75rem;
}
.learning-list li {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1.1rem;
  color: var(--fg-muted);
  font-size: 0.95rem;
}

/* ------- contact ------- */
.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ------- footer ------- */
.site-footer {
  padding: 2rem var(--pad-x);
  text-align: center;
  color: var(--fg-dim);
  font-size: 0.88rem;
  background: var(--bg);
}
.site-footer a { color: var(--fg-muted); }
.site-footer a:hover { color: var(--accent); }

/* ------- small-screen tweaks ------- */
@media (max-width: 540px) {
  .hero-inner { padding: 2.5rem 0 3rem; }
  .section { padding: 3rem var(--pad-x); }
  .cta-row .btn { flex: 1 1 auto; justify-content: center; }
}

/* =========================================================
   v2 additions — desktop-first dense portfolio
   ========================================================= */

/* ------- featured project (the spine of the page) ------- */
.section-featured {
  padding-top: 4.5rem;
  padding-bottom: 4.5rem;
}
.featured-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 0.5rem;
}
.section-featured h2 {
  padding-left: 0;
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  margin-bottom: 2rem;
}
.section-featured h2::before { content: none; }

.featured-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}
@media (min-width: 880px) {
  .featured-grid {
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
  }
}
.featured-media a {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border);
}
.featured-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.featured-media a:hover img { transform: scale(1.02); }

.featured-summary {
  font-size: 1.02rem;
  color: var(--fg);
  margin: 0 0 1.25rem;
}
.featured-summary strong { color: var(--accent); }

.specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}
.specs li {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  color: var(--fg);
  padding: 0.32rem 0.7rem;
  border-radius: 6px;
  white-space: nowrap;
}

.featured-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ------- shipped work (5 dense categories) ------- */
.shipped-cats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
}
@media (min-width: 980px) {
  .shipped-cats {
    grid-template-columns: 1fr 1fr;
    gap: 2.25rem 3rem;
  }
}
.shipped-cat h3 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--fg-muted);
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 0.55rem;
  margin: 0 0 1rem;
  font-weight: 700;
}
.shipped-items {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.shipped-items li {
  color: var(--fg-muted);
  font-size: 0.94rem;
  line-height: 1.55;
}
.shipped-items strong {
  color: var(--fg);
  font-weight: 700;
}

/* ------- education ------- */
.education-list {
  display: grid;
  gap: 0.7rem;
  font-size: 1rem;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}
.education-list li { color: var(--fg-muted); line-height: 1.55; }
.education-list strong { color: var(--fg); }

.extras-line {
  margin: 1.75rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--fg-dim);
}

.education-list .edu-note {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.86rem;
  color: var(--fg-dim);
  line-height: 1.5;
}

/* ------- featured media: stacked demo GIF + CAD drawing ------- */
.featured-media {
  display: grid;
  gap: 1rem;
}
/* dark-gray backing instead of pitch black, to match the theme */
.featured-media a {
  background: var(--bg-elev);
}
.featured-media video {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
/* CAD render is a transparent PNG: show it full (no 16:9 crop) so the
   part floats on the dark theme like an intentional section figure */
.cad-figure { margin: 0; }
.cad-figure img {
  aspect-ratio: auto;
  object-fit: contain;
}
.cad-figure figcaption {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-dim);
}