/* ═══════════════════════════════════════════════════════════════
   kc.css – Shared styles for Konstantinos Chronopoulos website
   ═══════════════════════════════════════════════════════════════ */

:root {
  --site-font: 'Lato', sans-serif;
  --site-fsize: 17px;
  --color-text: #333333;
  --color-page-bg: #f0f0f0;
  --color-post-bg: #ffffff;
  --color-menu-bg: #1a2332;
  --color-menu-txt: #ffffff;
  --color-accent: #2980b9;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0; width: 100%;
  font-family: var(--site-font);
  font-size: var(--site-fsize);
  color: var(--color-text);
  min-height: 100vh;
  background-color: var(--color-page-bg);
}

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

/* ── Navigation ─────────────────────────────────────────────── */
.kc-nav {
  width: 100%;
  background-color: var(--color-menu-bg);
  color: var(--color-menu-txt);
  display: flex;
  align-items: stretch;
  min-height: 56px;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  box-sizing: border-box;
}

.kc-nav-brand {
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-menu-txt) !important;
  text-decoration: none;
  white-space: nowrap;
  border-right: 1px solid rgba(255,255,255,0.12);
}
.kc-nav-brand:hover { color: var(--color-accent) !important; }

.kc-nav-links {
  display: flex;
  align-items: stretch;
  flex: 1;
  margin: 0;
  padding: 0;
  list-style: none;
}

.kc-nav-links li {
  position: relative;
  display: flex;
}

.kc-nav-links > li > a {
  display: flex;
  align-items: center;
  padding: 0 1.1rem;
  color: var(--color-menu-txt);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.97em;
  letter-spacing: 0.02em;
  transition: background 0.15s, color 0.15s;
  border-right: 1px solid rgba(255,255,255,0.07);
  white-space: nowrap;
}
.kc-nav-links > li > a:hover,
.kc-nav-links > li > a.active {
  background: var(--color-accent);
  color: #fff;
}

/* Dropdown */
.kc-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--color-menu-bg);
  border: 1px solid rgba(255,255,255,0.12);
  border-top: 2px solid var(--color-accent);
  border-radius: 0 0 .4rem .4rem;
  list-style: none;
  padding: 0;
  margin: 0;
  z-index: 2000;
  box-shadow: 0 6px 18px rgba(0,0,0,0.3);
}
.kc-nav-links > li:hover .kc-dropdown { display: block; }
.kc-dropdown li a {
  display: block;
  padding: .55rem 1.2rem;
  color: var(--color-menu-txt);
  text-decoration: none;
  font-size: 0.92em;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  transition: background 0.12s;
}
.kc-dropdown li:last-child a { border-bottom: none; }
.kc-dropdown li a:hover { background: var(--color-accent); color: #fff; }

/* has-sub arrow */
.has-sub > a::after { content: ' ▾'; font-size: .75em; opacity: .7; }

/* Admin-Link ganz rechts */
.kc-nav-links > li.kc-nav-admin { margin-left: auto; }
@media (max-width: 768px) {
  .kc-nav-links > li.kc-nav-admin { margin-left: 0; }
}

/* Mobile toggle button */
.kc-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--color-menu-txt);
  padding: .35rem .75rem;
  margin: auto 1rem;
  border-radius: .35rem;
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
}

/* Mobile layout */
@media (max-width: 768px) {
  .kc-nav { flex-wrap: wrap; }
  .kc-nav-toggle { display: block; }
  .kc-nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    background: var(--color-menu-bg);
  }
  .kc-nav-links.open { display: flex; }
  .kc-nav-links li { display: block; }
  .kc-nav-links > li > a {
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding: .75rem 1.5rem;
    width: 100%;
  }
  .kc-dropdown {
    position: static;
    border: none;
    box-shadow: none;
    background: rgba(0,0,0,0.15);
  }
  .kc-nav-links > li:hover .kc-dropdown { display: none; }
  .kc-nav-links > li.open .kc-dropdown  { display: block; }
}

/* ── Page wrapper ────────────────────────────────────────────── */
.kc-wrap {
  width: 100%;
  padding: 2rem;
  box-sizing: border-box;
}

/* ── Post cards ──────────────────────────────────────────────── */
.kc-post-card {
  background: var(--color-post-bg);
  border-radius: .75rem;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  margin-bottom: 1.8rem;
  border: 1px solid rgba(0,0,0,0.07);
  transition: box-shadow .2s, transform .2s;
}
.kc-post-card:hover {
  box-shadow: 0 6px 22px rgba(0,0,0,0.18);
  transform: translateY(-2px);
}
.kc-post-card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.kc-post-card-body { padding: 1.3rem 1.5rem; }
.kc-post-card-title { font-size: 1.2em; font-weight: 700; color: var(--color-text); margin-bottom: .4rem; }
.kc-post-card-title a { color: inherit; text-decoration: none; }
.kc-post-card-title a:hover { color: var(--color-accent); }
.kc-post-card-date    { font-size: .82em; color: #888; margin-bottom: .5rem; }
.kc-post-card-excerpt { font-size: .92em; color: #666; margin-top: .3rem; }
[data-theme="dark"] .kc-post-card-excerpt { color: #aab0bc; }

/* ── Section heading ─────────────────────────────────────────── */
.kc-section-title {
  font-size: 1.8em;
  font-weight: 800;
  border-left: 5px solid var(--color-accent);
  padding-left: .85rem;
  margin-bottom: 1.5rem;
  margin-top: 1rem;
  color: var(--color-text);
}

/* ── Category cards (index page) ────────────────────────────── */
.kc-cat-card {
  border-radius: .85rem;
  overflow: hidden;
  box-shadow: 0 3px 14px rgba(0,0,0,0.12);
  margin-bottom: 2rem;
  text-decoration: none;
  display: block;
  transition: transform .2s, box-shadow .2s;
}
.kc-cat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 26px rgba(0,0,0,0.2);
}
.kc-cat-card-header {
  padding: 1.6rem 1.5rem 1rem;
  background: var(--color-accent);
  color: #fff;
  min-height: 90px;
}
.kc-cat-card-header h3 { margin: 0; font-size: 1.4em; font-weight: 800; }
.kc-cat-card-body {
  padding: 1rem 1.5rem 1.3rem;
  background: var(--color-post-bg);
}
.kc-cat-card-post-title { font-weight: 700; color: var(--color-text); margin-bottom: .3rem; }
.kc-cat-card-post-excerpt { font-size: .9em; color: #777; }

/* ── Footer ──────────────────────────────────────────────────── */
.kc-footer {
  width: 100%;
  background: var(--color-menu-bg);
  color: var(--color-menu-txt);
  text-align: center;
  padding: 1.2rem 1rem;
  font-size: .88em;
  margin-top: 3rem;
}
.kc-footer a { color: var(--color-accent); text-decoration: none; }
.kc-footer a:hover { color: #fff; }

/* ── Breadcrumb ──────────────────────────────────────────────── */
.kc-breadcrumb { font-size: .88em; color: #888; margin-bottom: 1rem; }
.kc-breadcrumb a { color: var(--color-accent); text-decoration: none; }
.kc-breadcrumb a:hover { text-decoration: underline; }

/* ── Single post ─────────────────────────────────────────────── */
.kc-post-single {
  background: var(--color-post-bg);
  border-radius: .85rem;
  padding: 2rem 2.5rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.09);
  max-width: 860px;
  margin: 0 auto;
}
.kc-post-single h1 { font-size: 2em; font-weight: 800; margin-bottom: .4rem; }
.kc-post-content { line-height: 1.8; }
.kc-post-content img { max-width: 100%; }

/* ── Dark mode ───────────────────────────────────────────────── */
[data-theme="dark"] {
  --color-text:     #dde1e7;
  --color-page-bg:  #1a1d27;
  --color-post-bg:  #23273a;
  --color-menu-bg:  #0f1117;
  --color-menu-txt: #dde1e7;
  --color-accent:   #5aacff;
}
[data-theme="dark"] body { background-color: var(--color-page-bg); }
[data-theme="dark"] .kc-post-card,
[data-theme="dark"] .kc-cat-card-body,
[data-theme="dark"] .kc-post-single { box-shadow: 0 2px 14px rgba(0,0,0,0.4); }
[data-theme="dark"] .kc-post-card-date,
[data-theme="dark"] .kc-cat-card-post-excerpt { color: #9aa0b0; }
[data-theme="dark"] .kc-breadcrumb { color: #778; }

/* ── Darkmode button ─────────────────────────────────────────── */
.kc-darkmode-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--color-menu-txt);
  padding: .3rem .7rem;
  margin: auto .8rem auto auto;
  border-radius: .35rem;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  transition: background .15s;
  flex-shrink: 0;
}
.kc-darkmode-btn:hover { background: rgba(255,255,255,0.12); }
@media (max-width: 768px) {
  .kc-darkmode-btn { margin: auto .5rem; }
}

/* ── Scroll animations ───────────────────────────────────────── */
.kc-anim {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.kc-anim.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Stagger delays for grids */
.kc-anim:nth-child(2) { transition-delay: 0.08s; }
.kc-anim:nth-child(3) { transition-delay: 0.16s; }
.kc-anim:nth-child(4) { transition-delay: 0.24s; }
.kc-anim:nth-child(5) { transition-delay: 0.32s; }
.kc-anim:nth-child(6) { transition-delay: 0.40s; }

/* ── Lightbox gallery ────────────────────────────────────────── */
.kc-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: .8rem;
  margin-top: 1.5rem;
}
.kc-gallery-thumb {
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: .5rem;
  cursor: zoom-in;
  transition: transform .2s, box-shadow .2s;
  width: 100%;
}
.kc-gallery-thumb:hover { transform: scale(1.04); box-shadow: 0 4px 16px rgba(0,0,0,0.25); }

.kc-lightbox {
  display: none;
  position: fixed; inset: 0; z-index: 9000;
  background: rgba(0,0,0,0.92);
  align-items: center; justify-content: center;
}
.kc-lightbox.open { display: flex; }
.kc-lightbox img {
  max-width: 92vw; max-height: 90vh;
  border-radius: .6rem;
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
  object-fit: contain;
}
.kc-lightbox-close {
  position: absolute; top: 1.2rem; right: 1.5rem;
  color: #fff; font-size: 2.2rem; cursor: pointer;
  background: none; border: none; line-height: 1;
  opacity: .8;
}
.kc-lightbox-close:hover { opacity: 1; }
.kc-lightbox-prev, .kc-lightbox-next {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,0.15); border: none;
  color: #fff; font-size: 2rem; padding: .5rem 1rem;
  cursor: pointer; border-radius: .4rem;
  transition: background .15s;
}
.kc-lightbox-prev { left: 1rem; }
.kc-lightbox-next { right: 1rem; }
.kc-lightbox-prev:hover,
.kc-lightbox-next:hover { background: rgba(255,255,255,0.3); }

/* ── Loading spinner ─────────────────────────────────────────── */
.kc-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  font-size: 1.1em;
  color: #888;
}

/* ── Alert ───────────────────────────────────────────────────── */
.alert { padding: 1rem 1.2rem; border-radius: .5rem; }
.alert-danger { background: #fde; color: #900; border: 1px solid #f99; }