/* --- CSS VARIABLES & RESET --- */
:root {
    --bg-dark: #081018;
    --text-white: #ffffff;
    --accent-green: #7ab800;
    --card-bg: #e6e6e6;
    --card-text: #333333;
    --font-main: Arial, sans-serif;
    --transition-speed: 0.3s;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-white);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* --- HEADER & NAV --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 2rem 8rem;
    position: absolute;
    width: 100%;
    z-index: 100;
    top: 0;
}

.branding .logo-placeholder {
    cursor: pointer;
    transition: transform 0.2s;
}

.branding .logo-placeholder:hover {
    transform: scale(1.02);
}

nav {
    border-left: 2px solid rgba(255, 255, 255, 0.3);
    padding-left: 2rem;
}

nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    text-align: right;
}

nav a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 400;
    font-size: 19px;
    transition: color var(--transition-speed), padding-right var(--transition-speed);
    cursor: pointer;
}

nav a:hover, nav a.active {
    color: var(--text-white);
    padding-right: 8px;
    font-weight: bold;
}

.hamburger {
    display: block;
    font-size: 2rem;
    cursor: pointer;
  }
/* Verstecke Checkbox und Burger auf Desktop */
#menu-toggle, .hamburger {
  display: none;
}

/* --- SECTIONS --- */
section {
    display: none; 
    padding-top: 50px;
    min-height: 100vh;
}

section.active {
    display: block;
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- HERO SECTION --- */
#home {
    background-size: cover;
    background-position: center;
    position: relative;
}

.logo {
	display: flex;
    flex-direction: row;
    justify-content: left;
    padding-top: 16rem;
    padding-left: 8rem;
}

.hero-content {
    max-width: 800px;
    z-index: 10;
}

.hero-title {
	align-content: left;
    font-size: 42px;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.text-green { color: var(--accent-green); }

.hero-sub {
    font-size: 19px;
    color: #ccc;
    margin-bottom: 2rem;
    max-width: 600px;
}

.cta-link {
    color: var(--text-white);
    font-size: 19px;
    text-decoration: none;
    font-weight: bold;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.aktuelles-teaser {
	margin-top: 2rem;
	border: 2px solid;
	border-color: #ccc;
    font-size: 19px;
    color: #ccc;
    margin-bottom: 2rem;
    max-width: 600px;
	padding: 1em;
}
.aktuelles-link {
    font-size: 42px;
    color: #fff;
	text-decoration: none;
    font-weight: bold;
}


.cta-link:hover {
    border-bottom-color: var(--accent-green);
}

#myVideo {
    position: absolute;
    right: 0;
    bottom: 0;
    z-index: -1;
    min-width: 100%; 
    min-height: 100%;
    object-fit: cover;
    opacity: 0.6;
}

/* --- CONTENT PAGES --- */
.page-header {
    height: 360px;
    background-color: #1a2a3a;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: flex-end;
    padding: 0 0 2rem 8rem;
    margin-bottom: 2rem;
    position: relative;
    margin-top: -160px;
    padding-top: 160px;
}

/* Background Overlays */
.header-kompetenzen { 
    background-image: linear-gradient(to right, rgba(8, 16, 24, 0.9), transparent), url('images/Bild_Hintergrund_KI_Kompetenzen_weich_4_5_Gaus.png'); 
}
.header-leistungen { 
    background-image: linear-gradient(to right, rgba(8, 16, 24, 0.9), transparent), url('images/Bild_Hintergund_KI_Leistung_weich.png'); 
}
.header-forschung { 
    background-image: linear-gradient(to right, rgba(8, 16, 24, 0.9), transparent), url('images/Bild_Hintergrund_KI_Forschungsgruppen_weich_4_5_Gaus.png'); 
}
.header-ueber-uns { 
    background-image: linear-gradient(to right, rgba(8, 16, 24, 0.9), transparent), url('images/Bild_Hintergrund_KI_Forschungsgruppen_weich_4_5_Gaus.png'); 
}
.header-kontakt { 
    background-image: linear-gradient(to right, rgba(8, 16, 24, 0.9), transparent), url('images/kontakt.png'); 
}

.page-title {
	min-width: 350px;
    font-size: 42px;
    font-weight: bold;
    z-index: 2;
}

/* --- CARD GRID --- */
.grid-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 0 8rem 4rem 8rem;
    max-width: 1600px;
    margin: 0 auto;
}
.grid-container-one {
    display: grid;
/*    grid-template-columns: repeat(3, 1fr);*/
	grid-template-columns: 1fr; padding: 2rem; 
    gap: 2rem;
    padding: 0 8rem 4rem 8rem;
    max-width: 1600px;
    margin: 0 auto;
}

.card {
    background-color: var(--card-bg);
    color: var(--card-text);
    display: flex;
    flex-direction: column;
    border-bottom: 4px solid #ccc;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    border-bottom-color: var(--accent-green);
}

.card-img-methods, .card-img-fields, .card-img-persons, 
.card-img-education, .card-img-consulting, .card-img-cooperation,
.card-img-labor, .card-img-projects, .card-img-publications, .card-img-invitation {
    height: 120px;
    background-color: #555;
    background-size: cover;
    background-position: center;
}
.card-img-methods {
    background-image: url('images/Bild_Hintergrund_KI_Kompetenzen_methods.png');
}
.card-img-fields {
    background-image: url('images/Bild_Hintergrund_KI_Kompetenzen_fields.png');
}
.card-img-persons {
    background-image: url('images/Bild_Hintergrund_KI_Kompetenzen_persons.png');
}
.card-img-education {
    background-image: url('images/Bild_Hintergrund_KI_Leistungen_education.png');
}
.card-img-consulting {
    background-image: url('images/Bild_Hintergrund_KI_Leistungen_consulting.png');
}
.card-img-cooperation {
    background-image: url('images/Bild_Hintergrund_KI_Leistungen_transfer.png');
}
.card-img-labor {
    background-image: url('images/Bild_Hintergrund_KI_Forschungsgruppen_labor.png');
}
.card-img-projects {
    background-image: url('images/Bild_Hintergrund_KI_Forschungsgruppen_projects.png');
}
.card-img-publications {
    background-image: url('images/Bild_Hintergrund_KI_Forschungsgruppen_publications.png');
}
.card-img-invitation {
    background-image: url('images/wh_einladung.png');
}

.img-muted { opacity: 0.7; }

.card-body {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #000;
}

.card p {
    font-size: 0.9rem;
    margin-bottom: 2rem;
    color: #555;
}

.btn-learn {
    margin-top: auto;
    align-self: flex-end;
    padding: 0.5rem 1.5rem;
    border: 1px solid #999;
    color: #666;
    text-decoration: none;
    text-transform: uppercase;
    font-size: 0.8rem;
    transition: 0.2s;
}

.btn-learn:hover {
    background-color: #333;
    color: #fff;
}

/* --- ÜBER UNS STYLING --- */

.content-container {
    padding: 2rem 8rem 4rem 8rem;
    max-width: 1400px;
    margin: 0 auto;
}

.mission-statement {
    margin-bottom: 3rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.mission-statement h3, .table-responsive h3 {
    color: var(--accent-green);
    margin-top: 1.3rem;
    margin-bottom: 1.2rem;
    font-size: 1.8rem;
}

/* Tabellen-Design */
.table-responsive {
    overflow-x: auto; /* Erlaubt horizontales Scrollen auf kleinen Handys */
    -webkit-overflow-scrolling: touch;
}

.leitung-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--card-bg);
    color: var(--card-text);
    margin-top: 1rem;
    margin-bottom: 2rem;
    min-width: 400px; /* Verhindert, dass die Tabelle zu sehr gequetscht wird */
}

.leitung-table th, .leitung-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #ccc;
	min-width: 250px;
}

.leitung-table th {
    background-color: #f2f2f2;
    color: #000;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.leitung-table tr:hover {
    background-color: #f9f9f9;
}

.logo-placeholder {
		height: 96px;
		width: 610px;
		background-size: cover;
		background-position: left;
		background-image: url('images/whki_logo.svg');
}

.footer-button {
    background: none;
    border: none;
    padding: 0;
    color: inherit; /* Nimmt die Textfarbe der Umgebung an */
    font: inherit;  /* Gleiche Schriftart */
    cursor: pointer;
    text-decoration: underline; /* Falls gewünscht */
}

/* Anpassung Header Bild (Beispiel) */
.header-ueberuns { 
    background-image: linear-gradient(to right, rgba(8, 16, 24, 0.9), transparent), url('images/Bild_Hintergrund_KI_Forschungsgruppen_weich_4_5_Gaus.png'); 
}

/* Grundlegendes Styling für den Footer */
.site-footer {
  background-color: #1a1a1a; /* Dunkler Hintergrund */
  color: #ffffff;            /* Weiße Schrift */
  padding: 10px 0;           /* Etwas Abstand oben und unten */
  font-family: Arial, sans-serif;
  font-size: 14px;
  width: 100%;
}

/* Container zur Zentrierung des Inhalts */
.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between; /* Copyright links, Links rechts */
  align-items: center;            /* Vertikal mittig */
  padding: 0 10px;
}

/* Styling für die Links */
.footer-nav a {
  color: #adb5bd;
  text-decoration: none;
  margin-left: 20px;
  transition: color 0.3s ease; /* Sanfter Übergang beim Hovern */
}

.footer-nav a:hover {
  color: #ffffff; /* Link wird beim Drüberfahren weiß */
}

  .tooltip {
    position: relative;
    cursor: pointer;
  }

  .tooltip .tooltiptext {
    visibility: hidden;
    width: 300px;
    background-color: gray;
    color: #eee;
    text-align: left;
    border-radius: 6px;
    padding: 5px;
    position: absolute;
    z-index: 1;
    bottom: 125%; /* Position über der Zelle */
    left: 50%;
    margin-left: -150px;
    opacity: 0;
    transition: opacity 0.3s;
  }

  .tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
  }


/* Programm */
.schedule-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-size: 0.9rem;
}

.schedule-table caption {
    text-align: left;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.schedule-table thead th {
    padding: 12px;
    background-color: #2c3e50;
    color: white;
    font-weight: 600;
}

.schedule-table tbody th { /* Time column */
    padding: 12px;
    font-weight: bold;
    text-align: right;
    width: 120px; /* Give time column a fixed width */
    vertical-align: top;
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
}

.schedule-table tbody td {
    border: 1px solid #dee2e6;
    padding: 12px;
    vertical-align: top; /* Important for rowspan */
}

/* Session Styling */
.session {
    padding: 10px;
    border-radius: 4px;
    height: 100%;
}

.session-title {
    font-weight: bold;
    display: block;
    margin-bottom: 5px;
}
.session-speaker {
    font-size: 0.85rem;
    color: #555;
    display: block;
}
.session-details {
    font-size: 0.85rem;
    margin-top: 8px;
    color: #666;
}

/* Color coding for session types */
.session-keynote { background-color: #fdf2f2; border-left: 4px solid #e74c3c; }
.session-talk { background-color: #ebf5fb; border-left: 4px solid #3498db; }
.session-break { background-color: #f2f3f4; border-left: 4px solid #95a5a6; }
.session-workshop { background-color: #fef5e7; border-left: 4px solid #f39c12; }





/* Responsive Anpassungen für die Abstände */
@media (max-width: 1024px) {
    .content-container { padding: 2rem 4rem; }
	.logo-placeholder {
		    height: 96px;
			width: 610px;
			background-size: cover;
			background-position: center;
			background-image: url('images/whki_logo.svg');
	}
	.logo {
    padding-left: 2rem 
	padding-right: 1.5rem;
	}
	.page-header {
    margin-top: -160px;
    padding-top: 160px;
	}


}

@media (max-width: 768px) {
	.hamburger {
    display: block;
    cursor: pointer;
    }
	#main-nav {
		display: none
	}
	/* Wenn die Checkbox aktiv ist (geklickt), zeige das Menü */
	#menu-toggle:checked ~ #main-nav {
    display: flex;
  }

    .content-container { padding: 2rem 1.5rem; }
	.logo-placeholder {
		    height: 200px;
			width: 250px;
			background-size: cover;
			background-position: center;
			background-image: url('images/whki_logo_slim.svg');
	}
	.logo {
    padding-left: 2rem 
	padding-right: 1.5rem;
	}
	.page-header {
    margin-top: -40px;
    padding-top: 60px;
	}
	.footer-container {
    flex-direction: column; /* Stapelt die Elemente untereinander */
    text-align: center;
    gap: 10px;              /* Abstand zwischen Text und Links */
  }

  .footer-nav a {
    margin: 0 10px;         /* Gleichmäßiger Abstand auf dem Handy */
  }

}



/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
    header { padding: 1rem 2rem; }
    .grid-container { grid-template-columns: 1fr; padding: 2rem; }
    #home, .page-header { padding-left: 2rem; }
    .branding { flex-direction: column; align-items: flex-start; gap: 5px; }
}