/* ============================================
   LAYOUT CSS - Fagvalg Presentasjon
   Bergen Private Gymnas
   ============================================ */

/* ============================================
   1. SLIDES CONTAINER
   Hovedcontainer for alle slides
   ============================================ */
.slides-container {
    position: relative;
    width: 100vw;
    height: 100vh;
}

/* ============================================
   2. SLIDE BASE
   Grunnstiler for alle slides
   ============================================ */
.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
    overflow-y: auto;
    padding-bottom: 80px;
}

/* Aktiv slide */
.slide.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   3. SLIDE HEADER
   Header-seksjon for hver slide
   ============================================ */
.slide-header {
    background: linear-gradient(135deg, var(--bpg-dark) 0%, var(--bpg-teal) 100%);
    color: white;
    padding: 40px 15%;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* Dekorativ sirkel i header */
.slide-header::after {
    content: '';
    position: absolute;
    right: -50px;
    top: -50px;
    width: 200px;
    height: 200px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.1;
}

/* Header typografi */
.slide-header h1 {
    font-family: var(--font-family-heading);
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}

.slide-header p {
    font-size: 1.15rem;
    opacity: 0.85;
    font-weight: 400;
    position: relative;
    z-index: 1;
}

/* ============================================
   4. SLIDE CONTENT
   Hovedinnhold for hver slide
   ============================================ */
.slide-content {
    flex: 1;
    padding: 50px 15%;
    background: var(--bg-white);
}

/* ============================================
   5. GRID SYSTEMER
   Ulike grid-layouts brukt i presentasjonen
   ============================================ */

/* -----------------------------------------
   5.1 Three Columns Grid
   Brukes for 3-kolonners layout
   ----------------------------------------- */
.three-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 20px;
}

/* -----------------------------------------
   5.2 Program Grid
   Brukes for programomrader-korter
   ----------------------------------------- */
.program-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-top: 20px;
}

/* -----------------------------------------
   5.3 Fordypning Grid
   Brukes for fordypningskategorier
   ----------------------------------------- */
.fordypning-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 20px;
}

/* -----------------------------------------
   5.4 Contact Grid
   Brukes for kontaktinformasjon
   ----------------------------------------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 20px;
}

/* -----------------------------------------
   5.5 Fag Comparison Grid
   Brukes for sammenligning fellesfag/programfag
   ----------------------------------------- */
.fag-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 30px;
}

/* -----------------------------------------
   5.6 Links Grid
   Brukes for lenker i veien videre
   ----------------------------------------- */
.links-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ============================================
   6. RESPONSIVE GRID
   Tilpasninger for mindre skjermer
   ============================================ */

/* Tablet og mindre skjermer */
@media (max-width: 900px) {
    .slide-header {
        padding: 30px 5%;
    }

    .slide-content {
        padding: 30px 5%;
    }

    /* Alle grids til enkeltkolonne */
    .three-columns,
    .program-grid,
    .fag-comparison,
    .fordypning-grid,
    .links-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobil */
@media (max-width: 600px) {
    .slide-header h1 {
        font-size: 1.8rem;
    }
}