/* =====================================================
   Kyoto Theme — Ghost Kyoto-inspired minimal portfolio
   onurka.com
   ===================================================== */

/* === Fonts === */
@import url('https://api.fontshare.com/v2/css?f[]=switzer@400,500,600,700&display=swap');

/* === Reset === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* === CSS Variables (light mode) === */
:root {
  --bg:           #fafafa;
  --bg-card:      #ffffff;
  --fg:           #111111;
  --fg-muted:     #6b7280;
  --fg-subtle:    #9ca3af;
  --accent:       #7c3aed;
  --border:       #e5e7eb;
  --border-mid:   #d1d5db;

  --font:         'Switzer', 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono:    ui-monospace, 'JetBrains Mono', 'Fira Code', monospace;

  --container:    1100px;
  --pad:          2rem;
  --header-h:     68px;
  --radius:       8px;
  --radius-sm:    4px;
  --radius-full:  9999px;

  --ease:         cubic-bezier(0.16, 1, 0.3, 1);
  --t:            0.2s;
  --t-slow:       0.55s;
}

/* === Dark mode === */
@media (prefers-color-scheme: dark) {
  :root {
    --bg:         #0d0d0d;
    --bg-card:    #161616;
    --fg:         #f5f5f5;
    --fg-muted:   #9ca3af;
    --fg-subtle:  #6b7280;
    --accent:     #a78bfa;
    --border:     #262626;
    --border-mid: #3f3f46;
  }
}

/* === Base === */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.75;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img, video {
  max-width: 100%;
  display: block;
}

/* === Container === */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* ===================================================
   HEADER
   =================================================== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: var(--bg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t) var(--ease);
}

.site-header.scrolled {
  border-bottom-color: var(--border);
}

.header-inner {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.site-logo {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--fg);
  transition: opacity var(--t) var(--ease);
}

.site-logo:hover { opacity: 0.6; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--fg-muted);
  letter-spacing: -0.01em;
  transition: color var(--t) var(--ease);
}

.nav-link:hover { color: var(--fg); }

/* ===================================================
   HERO
   =================================================== */
.hero {
  padding-top: var(--header-h);
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding: 6rem var(--pad);
}

.hero-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-bottom: 1.5rem;
  animation: slideUp 0.6s var(--ease) 0.1s both;
}

.hero-title {
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--fg);
  margin-bottom: 1.5rem;
  animation: slideUp 0.6s var(--ease) 0.15s both;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--fg-muted);
  max-width: 52ch;
  line-height: 1.65;
  margin-bottom: 3rem;
  animation: slideUp 0.6s var(--ease) 0.2s both;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  animation: slideUp 0.6s var(--ease) 0.25s both;
}

/* ===================================================
   BUTTONS
   =================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.625rem 1.25rem;
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--t) var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}
.btn-primary:hover { opacity: 0.75; }

.btn-outline {
  background: transparent;
  color: var(--fg-muted);
  border-color: var(--border-mid);
}
.btn-outline:hover {
  color: var(--fg);
  border-color: var(--fg-muted);
}

/* ===================================================
   SECTIONS
   =================================================== */
.section {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.section-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-bottom: 2.5rem;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.5rem;
}

.section-header .section-label {
  margin-bottom: 0;
}

.section-more {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--fg-muted);
  transition: color var(--t) var(--ease);
}
.section-more:hover { color: var(--fg); }

/* ===================================================
   ABOUT SECTION
   =================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 6rem;
  align-items: start;
}

.about-bio {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--fg-muted);
}

.about-bio p + p { margin-top: 1.5rem; }

.about-bio strong, .about-bio b {
  color: var(--fg);
  font-weight: 500;
}

.about-bio a {
  color: var(--fg);
  text-decoration: underline;
  text-decoration-color: var(--border-mid);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--t) var(--ease);
}
.about-bio a:hover { text-decoration-color: var(--fg-muted); }

.about-meta {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.meta-block {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.meta-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-subtle);
}

.meta-value {
  font-size: 0.9375rem;
  color: var(--fg-muted);
}

.meta-links {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.meta-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.9375rem;
  color: var(--fg-muted);
  transition: color var(--t) var(--ease);
}
.meta-link:hover { color: var(--fg); }

.meta-link-icon {
  font-size: 0.7rem;
  opacity: 0.7;
}

/* ===================================================
   WORK SECTION
   =================================================== */
.work-list { display: flex; flex-direction: column; }

.work-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--border);
  text-decoration: none;
  transition: all var(--t) var(--ease);
}

.work-item:last-child {
  border-bottom: 1px solid var(--border);
}

.work-info { display: flex; flex-direction: column; gap: 0.5rem; }

.work-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.work-name {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg);
  transition: color var(--t) var(--ease);
}
.work-item:hover .work-name { color: var(--accent); }

.work-tags { display: flex; gap: 0.375rem; flex-wrap: wrap; }

.tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  background: var(--border);
  color: var(--fg-subtle);
}

.work-desc {
  font-size: 0.9375rem;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: 58ch;
}

.work-aside {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.375rem;
  flex-shrink: 0;
}

.work-year {
  font-size: 0.8125rem;
  color: var(--fg-subtle);
}

.work-arrow {
  color: var(--fg-subtle);
  font-size: 1.25rem;
  line-height: 1;
  transition: all var(--t) var(--ease);
}
.work-item:hover .work-arrow {
  color: var(--fg);
  transform: translate(4px, -4px);
}

/* ===================================================
   POSTS / WRITING LIST
   =================================================== */
.posts-list { display: flex; flex-direction: column; }

.post-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
  padding: 1.375rem 0;
  border-top: 1px solid var(--border);
  text-decoration: none;
  transition: all var(--t) var(--ease);
}

.post-item:last-child {
  border-bottom: 1px solid var(--border);
}

.post-date {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--fg-subtle);
  white-space: nowrap;
  min-width: 72px;
}

.post-title {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--fg);
  transition: color var(--t) var(--ease);
}
.post-item:hover .post-title { color: var(--accent); }

.post-arrow {
  color: var(--fg-subtle);
  font-size: 1rem;
  opacity: 0;
  transition: all var(--t) var(--ease);
  flex-shrink: 0;
}
.post-item:hover .post-arrow {
  color: var(--fg);
  opacity: 1;
  transform: translate(4px, -4px);
}

/* ===================================================
   SINGLE POST
   =================================================== */
.post-layout {
  padding-top: calc(var(--header-h) + 4rem);
  padding-bottom: 8rem;
}

.post-header {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad);
  padding-bottom: 3rem;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--border);
}

.post-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--fg-muted);
  margin-bottom: 2rem;
  transition: color var(--t) var(--ease);
}
.post-back:hover { color: var(--fg); }

.post-category {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.post-title-xl {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--fg);
  margin-bottom: 1.25rem;
}

.post-description-lg {
  font-size: 1.125rem;
  color: var(--fg-muted);
  line-height: 1.65;
  max-width: 58ch;
  margin-bottom: 1.5rem;
}

.post-byline {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--fg-subtle);
}

.post-byline-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
}

/* ===================================================
   PROSE (article body)
   =================================================== */
.article-body {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.prose {
  max-width: 68ch;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--fg-muted);
}

.prose h2, .prose h3, .prose h4 {
  color: var(--fg);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.3;
}
.prose h2 { font-size: 1.5rem; margin-top: 3rem; margin-bottom: 1rem; }
.prose h3 { font-size: 1.25rem; margin-top: 2rem; margin-bottom: 0.75rem; }
.prose p { margin-bottom: 1.5rem; }
.prose a {
  color: var(--fg);
  text-decoration: underline;
  text-decoration-color: var(--border-mid);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--t) var(--ease);
}
.prose a:hover { text-decoration-color: var(--fg); }
.prose strong { color: var(--fg); font-weight: 600; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--border);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}
.prose pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}
.prose pre code { background: none; padding: 0; font-size: 0.9375rem; }
.prose blockquote {
  border-left: 2px solid var(--border-mid);
  padding-left: 1.5rem;
  color: var(--fg-muted);
  font-style: italic;
  margin-bottom: 1.5rem;
}
.prose ul, .prose ol { margin-bottom: 1.5rem; padding-left: 1.5rem; }
.prose li { margin-bottom: 0.5rem; }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 3rem 0; }
.prose img { border-radius: var(--radius); margin-bottom: 1.5rem; }

/* ===================================================
   LIST PAGE (archive)
   =================================================== */
.list-layout {
  padding-top: calc(var(--header-h) + 4rem);
  padding-bottom: 8rem;
}

.list-header {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad);
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.list-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
}

.list-body {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* ===================================================
   FOOTER
   =================================================== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}

.footer-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-copy {
  font-size: 0.875rem;
  color: var(--fg-subtle);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--fg-subtle);
  transition: color var(--t) var(--ease);
}
.footer-link:hover { color: var(--fg); }

/* ===================================================
   ANIMATIONS
   =================================================== */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0);    }
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--t-slow) var(--ease),
              transform var(--t-slow) var(--ease);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================================
   RESPONSIVE
   =================================================== */
@media (max-width: 900px) {
  :root { --pad: 1.5rem; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 600px) {
  :root { --pad: 1.25rem; }

  .hero-inner { padding-top: 4rem; padding-bottom: 4rem; }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .post-item {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
  .post-arrow { display: none; }

  .work-item { grid-template-columns: 1fr; }
  .work-aside { align-items: flex-start; flex-direction: row; gap: 0.75rem; }
  .work-arrow { display: none; }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .footer-links { flex-wrap: wrap; gap: 1rem; }

  .section { padding: 4rem 0; }
}