/* assets/css/main.css */

/* Farbwerte orientieren sich an den klassischen HTW-Hausfarben Blau/Orange. */
:root{
  --c-blue: rgb(0,110,183);
  --c-orange: rgb(249,155,28);
  --c-text: #1a1a1a;
  --c-muted: #5a5f66;
  --c-bg: #ffffff;
  --c-surface: #f6f7f9;
  --c-border: #e3e6ea;

  --radius: 14px;
  --shadow: 0 8px 24px rgba(0,0,0,.08);

  --container: 1100px;
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: Arial, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Helvetica, sans-serif;
  line-height: 1.55;
  color: var(--c-text);
  background: var(--c-bg);
}

a{ color: var(--c-blue); text-decoration: none; }
a:hover{ text-decoration: underline; }

.container{
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
}

.skip-link{
  position:absolute;
  left:-999px;
  top:auto;
  width:1px;
  height:1px;
  overflow:hidden;
}
.skip-link:focus{
  position: fixed;
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: .6rem .9rem;
  background: var(--c-blue);
  color: #fff;
  border-radius: 10px;
  z-index: 9999;
}

/* Header */
.site-header .topbar{
  border-bottom: 1px solid var(--c-border);
  background: #fff;
}
.topbar__inner{
  display:flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .9rem 0;
}

.brand__link{
  display: inline-flex;
  flex-direction: column;
  gap: .15rem;
}
.brand__name{
  font-weight: 700;
  letter-spacing: .2px;
}
.brand__sub{
  font-size: .95rem;
  color: var(--c-muted);
}

.nav{
  display:flex;
  gap: .25rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav__item{
  padding: .45rem .7rem;
  border-radius: 999px;
  color: var(--c-text);
}
.nav__item:hover{
  background: var(--c-surface);
  text-decoration: none;
}
.nav__item.is-active{
  background: rgba(0,110,183,.10);
  color: var(--c-blue);
  font-weight: 700;
}

/* Masthead mit 45° Akzent */
.masthead{
  background: linear-gradient(180deg, #fff 0%, var(--c-surface) 100%);
  border-bottom: 1px solid var(--c-border);
  padding: 1.4rem 0 1.6rem;
  position: relative;
}
.masthead__accent{
  width: 180px;
  height: 10px;
  background: linear-gradient(90deg, var(--c-blue), var(--c-orange));
  transform: skewX(-45deg);
  border-radius: 999px;
  margin: .2rem 0 1rem;
}
.masthead__kicker{
  margin: 0;
  color: var(--c-muted);
  font-size: .95rem;
}
.masthead__title{
  margin: .2rem 0 0;
  font-size: clamp(1.4rem, 1rem + 1.4vw, 2.2rem);
  line-height: 1.2;
}

/* Main */
.site-main{
  padding: 1.6rem 0 2.2rem;
}
.grid{
  display: grid;
  gap: 1rem;
}
.grid.cols-3{
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
@media (max-width: 900px){
  .grid.cols-3{ grid-template-columns: 1fr; }
  .topbar__inner{ align-items: flex-start; }
}

.card{
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
}
.card h2, .card h3{
  margin-top: 0;
}
.lead{
  font-size: 1.05rem;
  color: var(--c-text);
}

.badge{
  display: inline-block;
  padding: .2rem .55rem;
  border-radius: 999px;
  background: rgba(249,155,28,.18);
  color: #6b3a00;
  font-weight: 700;
  font-size: .85rem;
}

/* Lists */
ul.clean{
  margin: .6rem 0 0;
  padding-left: 1.1rem;
}
hr.sep{
  border: 0;
  border-top: 1px solid var(--c-border);
  margin: 1.2rem 0;
}

/* Footer */
.site-footer{
  border-top: 1px solid var(--c-border);
  background: #fff;
  padding: 1.3rem 0;
}
.footer__inner{
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 1rem;
  align-items: start;
}
.footer__meta{
  color: var(--c-muted);
  text-align: right;
}
@media (max-width: 900px){
  .footer__inner{ grid-template-columns: 1fr; }
  .footer__meta{ text-align: left; }
}
.is-disabled{
  color: var(--c-muted);
  pointer-events: none;
  text-decoration: none;
}

/* --- Lehre: Modulkacheln --- */
.tiles{
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: .8rem;
}

@media (max-width: 900px){
  .tiles{ grid-template-columns: 1fr; }
}

.tile{
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
  position: relative;
  overflow: hidden;
}

.tile::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 6px;
  width: 100%;
  background: linear-gradient(90deg, var(--c-blue), var(--c-orange));
}

.tile__title{
  margin: .2rem 0 .6rem;
  line-height: 1.25;
  font-size: 1.05rem;
}

.tile__code{
  display: inline-block;
  font-weight: 700;
  color: var(--c-blue);
  margin-right: .35rem;
}

.tile__meta{
  margin: 0;
  padding-left: 1.1rem;
  color: var(--c-text);
}

.tile__meta li{
  margin: .2rem 0;
  color: var(--c-muted);
}