/* ------------------------------------------------------------------ *
 * koljagrosse.com — Stylesheet (Apple-inspired, hell & minimalistisch)
 * ------------------------------------------------------------------ */

:root {
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(0, 0, 0, 0.08);
  --card: #ffffff;
  --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.06);
  --card-shadow-hover: 0 2px 4px rgba(0, 0, 0, 0.06), 0 18px 40px rgba(0, 0, 0, 0.12);
  --radius: 22px;
  --max-width: 34rem;
  --max-width-wide: 45rem;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 1.5rem 4rem;
}

.wrap--wide {
  max-width: var(--max-width-wide);
}

/* ------------------------------------------------------------------ *
 * Landing — Hero
 * ------------------------------------------------------------------ */

.hero {
  text-align: center;
  margin-bottom: 3.5rem;
  transition: opacity 0.5s var(--ease);
}

.hero-mark {
  width: 76px;
  height: 76px;
  margin: 0 auto 1.4rem;
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #fff;
  background: linear-gradient(150deg, #2b2b2f 0%, #1d1d1f 100%);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
  transition: box-shadow 0.5s var(--ease);
}

.hero-title {
  font-size: 2.6rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  margin: 0 0 0.3rem;
  transition: color 0.5s var(--ease), text-shadow 0.5s var(--ease);
}

.hero-sub {
  color: var(--muted);
  font-size: 1.15rem;
  margin: 0;
  transition: color 0.5s var(--ease), text-shadow 0.5s var(--ease);
}

/* ------------------------------------------------------------------ *
 * Landing — Tiles
 * ------------------------------------------------------------------ */

.tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.1rem;
}

.tile {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1.1rem;
  padding: 1.6rem;
  min-height: 190px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  text-decoration: none;
  color: var(--fg);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    opacity 0.4s var(--ease), background 0.4s var(--ease),
    border-color 0.4s var(--ease);
  will-change: transform;
}

.tile:hover,
.tile:focus-visible {
  transform: translateY(-6px);
  box-shadow: var(--card-shadow-hover);
  outline: none;
}

.tile-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.14);
  transition: opacity 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.tile-icon svg {
  width: 30px;
  height: 30px;
}

.tile-icon--cv {
  background: linear-gradient(150deg, #4aa3ff 0%, #0a84ff 100%);
}

.tile-icon--projects {
  background: linear-gradient(150deg, #ffb340 0%, #ff7a00 100%);
}

.tile-icon--aviation {
  background: linear-gradient(150deg, #64d2ff 0%, #0a84ff 100%);
}

.tile-icon--f1 {
  background: linear-gradient(150deg, #ff6b5e 0%, #ff3b30 100%);
}

.tile-icon--github {
  background: linear-gradient(150deg, #40464e 0%, #24292f 100%);
}

.tile-icon--interests {
  background: linear-gradient(150deg, #d16bff 0%, #ff2d92 100%);
}

.tile-icon--foto {
  background: linear-gradient(150deg, #7d7aff 0%, #5e5ce6 100%);
}

.tile-icon--heimnetz {
  background: linear-gradient(150deg, #4be08a 0%, #0ab894 100%);
}

.tile-icon--fashion {
  background: linear-gradient(150deg, #bf5af2 0%, #7d3cff 100%);
}

.tile-icon--aws {
  background: linear-gradient(150deg, #ffb340 0%, #ff8a00 100%);
}

.tile-title {
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  transition: color 0.4s var(--ease);
}

.tile-arrow {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  color: var(--muted);
  font-size: 1.15rem;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease);
}

.tile:hover .tile-arrow,
.tile:focus-visible .tile-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ------------------------------------------------------------------ *
 * Landing — Hover: Vollbild-Hintergrundbild + Fokus auf eine Kachel
 * ------------------------------------------------------------------ */

.hover-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.hover-bg-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  /* Leichter Gaußscher Weichzeichner; kleine Skalierung kaschiert die
     ausgefransten Ränder, die durch den Blur entstehen. */
  filter: blur(2px);
  transform: scale(1.04);
  transition: opacity 0.6s var(--ease);
}

/* Abdunkelnder Schleier für Kontrast von Text & Kacheln über dem Foto */
.hover-bg-scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.38) 0%, rgba(0, 0, 0, 0.5) 100%);
  opacity: 0;
  transition: opacity 0.6s var(--ease);
}

/* Nur auf Geräten mit echtem Hover (Desktop). Touch-Geräte laden die
   großen Bilder nicht und behalten das schlichte weiße Layout. */
@media (hover: hover) {
  .hover-bg--lebenslauf { background-image: url("/images/lebenslauf.jpg"); }
  .hover-bg--interessen { background-image: url("/images/aviation.jpg"); }
  .hover-bg--projekte   { background-image: url("/images/heimnetzwerk.jpg"); }

  body:not(.menu-open):has(.tile--lebenslauf:hover) .hover-bg--lebenslauf,
  body:not(.menu-open):has(.tile--interessen:hover) .hover-bg--interessen,
  body:not(.menu-open):has(.tile--projekte:hover) .hover-bg--projekte {
    opacity: 1;
  }

  /* Nur Kacheln mit Foto (.tile--takeover) lösen die Vollbild-Ansicht
     aus — GitHub bleibt eine normale Karte. */
  body:not(.menu-open):has(.tile--takeover:hover) .hover-bg-scrim {
    opacity: 1;
  }

  /* Header bleibt sichtbar, wechselt für Kontrast auf helle Schrift */
  body:not(.menu-open):has(.tile--takeover:hover) .hero-title {
    color: #fff;
    text-shadow: 0 2px 16px rgba(0, 0, 0, 0.45);
  }

  /* Logo hebt sich per feinem weißen Ring vom Foto ab */
  body:not(.menu-open):has(.tile--takeover:hover) .hero-mark {
    box-shadow: 0 0 0 1.5px rgba(255, 255, 255, 0.55), 0 12px 34px rgba(0, 0, 0, 0.4);
  }

  /* Footer bleibt dezent präsent */
  body:not(.menu-open):has(.tile--takeover:hover) .footer {
    color: rgba(255, 255, 255, 0.65);
    border-top-color: rgba(255, 255, 255, 0.2);
  }

  /* Die drei nicht gehoverten Kacheln: minimalistische Geister-Chips,
     weiterhin sichtbar und klickbar */
  body:not(.menu-open) .tiles:has(.tile--takeover:hover) .tile:not(:hover) {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.22);
    box-shadow: none;
    transform: scale(0.97);
  }

  body:not(.menu-open) .tiles:has(.tile--takeover:hover) .tile:not(:hover) .tile-title {
    color: rgba(255, 255, 255, 0.82);
  }

  body:not(.menu-open) .tiles:has(.tile--takeover:hover) .tile:not(:hover) .tile-icon {
    opacity: 0.5;
    box-shadow: none;
  }

  /* Gehoverte Kachel als Milchglas-Fokus über dem Foto */
  body:not(.menu-open) .tiles:has(.tile--takeover:hover) .tile--takeover:hover {
    background: rgba(255, 255, 255, 0.55);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
  }
}

/* ------------------------------------------------------------------ *
 * Landing — 2nd menu level: Klick auf "Meine Interessen" bzw.
 * "Private Projekte" ersetzt die übrigen Kacheln durch Unterkacheln.
 * ------------------------------------------------------------------ */

/* Unterkacheln sind standardmäßig ausgeblendet */
.tile--sub {
  display: none;
}

/* Hintergrund bleibt fest stehen (auch ohne Hover); background-image
   hier gesetzt, damit es auch auf Touch-Geräten funktioniert. */
body.menu-open--interessen .hover-bg--interessen {
  background-image: url("/images/aviation.jpg");
  opacity: 1;
}

body.menu-open--projekte .hover-bg--projekte {
  background-image: url("/images/heimnetzwerk.jpg");
  opacity: 1;
}

body.menu-open .hover-bg-scrim {
  opacity: 1;
}

body.menu-open .hero-title {
  color: #fff;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.45);
}

body.menu-open .hero-mark {
  box-shadow: 0 0 0 1.5px rgba(255, 255, 255, 0.55), 0 12px 34px rgba(0, 0, 0, 0.4);
}

body.menu-open .footer {
  color: rgba(255, 255, 255, 0.65);
  border-top-color: rgba(255, 255, 255, 0.2);
}

/* Die drei anderen Hauptkacheln ausblenden ... */
body.menu-open--interessen .tile--lebenslauf,
body.menu-open--interessen .tile--github,
body.menu-open--interessen .tile--projekte,
body.menu-open--projekte .tile--lebenslauf,
body.menu-open--projekte .tile--github,
body.menu-open--projekte .tile--interessen {
  display: none;
}

/* ... und an gleicher Stelle durch die eigenen Unterkacheln ersetzen */
body.menu-open--interessen .sub-of-interessen,
body.menu-open--projekte .sub-of-projekte {
  display: flex;
  animation: tile-in 0.45s var(--ease) both;
}

/* Die Toggle-Kachel bleibt an ihrer Position:
   "Meine Interessen" unten links (3), "Private Projekte" unten rechts (4) */
body.menu-open--interessen .sub-aviation     { order: 1; }
body.menu-open--interessen .sub-formel1      { order: 2; }
body.menu-open--interessen .tile--interessen { order: 3; }
body.menu-open--interessen .sub-foto         { order: 4; }

body.menu-open--projekte .sub-heimnetz   { order: 1; }
body.menu-open--projekte .sub-fashion    { order: 2; }
body.menu-open--projekte .sub-aws        { order: 3; }
body.menu-open--projekte .tile--projekte { order: 4; }

/* Alle sichtbaren Kacheln als Milchglas über dem Foto */
body.menu-open .tiles .tile {
  background: rgba(255, 255, 255, 0.5);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-color: rgba(255, 255, 255, 0.55);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}

/* Die gewählte Kachel etwas heller hervorheben */
body.menu-open--interessen .tiles .tile--interessen,
body.menu-open--projekte .tiles .tile--projekte {
  background: rgba(255, 255, 255, 0.66);
  border-color: rgba(255, 255, 255, 0.85);
}

body.menu-open .tiles .tile:hover {
  transform: translateY(-6px);
  box-shadow: 0 26px 60px rgba(0, 0, 0, 0.38);
}

@keyframes tile-in {
  from { opacity: 0; transform: translateY(10px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ------------------------------------------------------------------ *
 * Sub-pages
 * ------------------------------------------------------------------ */

.back {
  display: inline-block;
  margin-bottom: 2.5rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s var(--ease);
}

.back:hover,
.back:focus-visible {
  color: var(--fg);
}

.page-title {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
}

.content p {
  margin: 0 0 1.1rem;
}

.content a {
  color: #0a84ff;
  text-underline-offset: 2px;
}

/* ------------------------------------------------------------------ *
 * Footer
 * ------------------------------------------------------------------ */

.footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  transition: opacity 0.5s var(--ease);
}

.footer a {
  color: var(--muted);
}

/* ------------------------------------------------------------------ *
 * Responsive
 * ------------------------------------------------------------------ */

@media (max-width: 620px) {
  .wrap {
    padding: 3.5rem 1.25rem 3rem;
  }

  .hero-title {
    font-size: 2.1rem;
  }

  .tiles {
    grid-template-columns: 1fr;
  }

  .tile {
    min-height: 140px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}