/* ==========================================
   PORTFOLIO – ÚVOD A SPOLEČNÁ ŠÍŘKA
========================================== */

.portfolio__obsah {
    padding-bottom: 28px;
}

.portfolio__uvod {
    margin: 0 0 26px;
}

.portfolio__uvod h1 {
    margin: 0;
    color: #565656;
    font-family: "Segoe UI Light", "Segoe UI", Arial, sans-serif;
    font-size: clamp(38px, 3.6vw, 48px);
    font-weight: 300;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.portfolio__uvod p {
    margin: 12px 0 0;
    color: #999999;
    font-family: "Segoe UI Light", "Segoe UI", Arial, sans-serif;
    font-size: clamp(15px, 1.2vw, 17px);
    font-weight: 300;
    line-height: 1.55;
    letter-spacing: 0.005em;
}

/* ==========================================
   ČTVERCOVÁ MŘÍŽKA PORTFOLIA
========================================== */

.portfolio__mrizka {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.portfolio__polozka {
    min-width: 0;
    margin: 0;
}

.portfolio__odkaz {
    display: block;
    overflow: hidden;
    aspect-ratio: 1 / 1;
    background: #f2f2f2;
    cursor: pointer;
}

.portfolio__odkaz img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    cursor: pointer;
    transition: transform 0.5s ease, opacity 0.3s ease;
}

.portfolio__odkaz:hover img {
    opacity: 0.9;
    transform: scale(1.02);
}

/* ==========================================
   TABLET
========================================== */

@media (max-width: 850px) {
    .portfolio__mrizka {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* ==========================================
   TELEFON
========================================== */

@media (max-width: 560px) {
    .portfolio__uvod {
        margin-bottom: 22px;
    }

    .portfolio__uvod h1 {
        font-size: 40px;
    }

    .portfolio__uvod p {
        font-size: 16px;
    }

    .portfolio__mrizka {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .portfolio__odkaz img {
        transition: none;
    }

    .portfolio__odkaz:hover img {
        transform: none;
    }
}

/* ==========================================
   ZVĚTŠENÁ FOTOGRAFIE
========================================== */

.portfolio-nahled[hidden] {
    display: none;
}

.portfolio-nahled {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 70px 86px;
    background: rgba(25, 25, 25, 0.72);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
}

body.portfolio-nahled-otevren {
    overflow: hidden;
}

.portfolio-nahled__fotografie {
    display: block;
    width: auto;
    height: auto;
    max-width: 72vw;
    max-height: 68vh;
    object-fit: contain;
    box-shadow: 0 18px 55px rgba(0, 0, 0, 0.24);
}

.portfolio-nahled__zavrit,
.portfolio-nahled__sipka {
    position: absolute;
    display: grid;
    place-items: center;
    padding: 0;
    border: 0;
    cursor: pointer;
    line-height: 1;
}

.portfolio-nahled__zavrit {
    top: 17px;
    right: 22px;
    width: 42px;
    height: 42px;
    background: transparent;
    color: #ffffff;
    font-size: 30px;
    font-weight: 300;
    transition: transform 0.4s ease, color 0.2s ease;
}

.portfolio-nahled__zavrit:hover {
    color: #c9c9c9;
    transform: rotate(90deg);
}

.portfolio-nahled--automaticky .portfolio-nahled__zavrit:focus-visible {
    outline: none;
}

@media (prefers-reduced-motion: reduce) {
    .portfolio-nahled__zavrit {
        transition: none;
    }

    .portfolio-nahled__zavrit:hover {
        transform: none;
    }
}

.portfolio-nahled__sipka {
    top: 50%;
    width: 54px;
    height: 54px;
    border-radius: 50%;
    transform: translateY(-50%);
    background: #f8f8f8;
    color: #383838;
    font-size: 33px;
    font-weight: 300;
}

.portfolio-nahled__sipka:hover {
    background: #ffffff;
    color: #777777;
}

.portfolio-nahled__sipka::before {
    content: "";
    width: 10px;
    height: 10px;
    border-top: 2px solid currentColor;
    border-right: 2px solid currentColor;
    transform: rotate(45deg);
}

.portfolio-nahled__sipka--vlevo::before {
    transform: rotate(-135deg);
}

.portfolio-nahled__sipka--vlevo {
    left: 18px;
}

.portfolio-nahled__sipka--vpravo {
    right: 18px;
}

@media (max-width: 560px) {
    .portfolio-nahled {
        padding: 62px 36px;
    }

    .portfolio-nahled__fotografie {
        max-width: 100%;
        max-height: calc(100dvh - 124px);
    }

    .portfolio-nahled__zavrit {
        top: 12px;
        right: 12px;
    }

    .portfolio-nahled__sipka {
        width: 40px;
        height: 40px;
        font-size: 28px;
    }

    .portfolio-nahled__sipka--vlevo {
        left: 2px;
    }

    .portfolio-nahled__sipka--vpravo {
        right: 2px;
    }
}