/* Design tokens taken from fajnspanek.cz (Fáze 1 - Grafický vzor) */
:root {
    --color-primary: #008092;
    --color-primary-hover: #76b728;
    --color-tertiary: #ffc807;
    --color-text: #566467;
    --color-heading: #1d1d1b;
    --color-nav-link: #242a2b;
    --color-border: #dadada;
    --color-divider: #deeaec;
    --shadow-card: rgba(0, 0, 0, 0.16) 0 5px 10px;
    --content-max-width: 1600px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Source Sans 3', sans-serif;
    font-size: 17px;
    line-height: 26px;
    color: var(--color-text);
}

h1, h2, h3 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    color: var(--color-heading);
    margin: 0 0 16px;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    color: var(--color-primary-hover);
}

img {
    max-width: 100%;
    display: block;
}

.c-btn {
    display: inline-block;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 14px;
    text-transform: uppercase;
    border-radius: 0;
    padding: 12px 24px;
    border: none;
    cursor: pointer;
}

.c-btn--primary {
    background: var(--color-primary);
    color: #fff;
}

.c-btn--primary:hover {
    background: var(--color-primary-hover);
    color: #fff;
}

/* Header */

.c-header__top {
    background: #fff;
    border-bottom: 1px solid var(--color-divider);
}

.c-header__top-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 16px 24px;
}

.c-header__logo {
    display: inline-flex;
    align-items: center;
}

.c-header__logo img {
    height: 50px;
    width: auto;
}

.c-header__hero {
    position: relative;
    background-color: var(--color-primary);
    background-size: cover;
    background-position: center right;
    min-height: 400px;
    display: flex;
    align-items: center;
    color: #fff;
}

.c-header__hero::before {
    content: '';
    position: absolute;
    inset: 0;
    /* keeps the title/subtitle readable regardless of exactly where the baked-in gradient of hero.png falls */
    background: linear-gradient(90deg, rgba(0, 128, 146, 0.55) 0%, rgba(0, 128, 146, 0) 60%);
}

.c-header__hero-inner {
    position: relative;
    z-index: 1;
    max-width: var(--content-max-width);
    margin: 0 auto;
    width: 100%;
    padding: 48px 24px;
    text-align: left;
}

.c-header__tagline {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 32px;
    margin: 0 0 12px;
    color: #fff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
}

.c-header__subtitle {
    font-size: 18px;
    margin: 0;
    color: #fff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
}

/* Main content */

.c-main {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 32px 24px;
}

.c-gallery__heading {
    text-align: center;
    margin-bottom: 32px;
}

/* Filters */

.c-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-bottom: 32px;
}

.c-filters__group {
    position: relative;
}

.c-filters__toggle {
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 15px;
    color: var(--color-nav-link);
    background: #fff;
    border: 1px solid var(--color-border);
    padding: 10px 16px;
    cursor: pointer;
}

.c-filters__group--active .c-filters__toggle {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.c-filters__dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: #fff;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    z-index: 10;
}

.c-filters__group.is-open .c-filters__dropdown {
    display: block;
}

.c-filters__value {
    display: block;
    padding: 8px 16px;
    color: var(--color-text);
}

.c-filters__value:hover,
.c-filters__value--active {
    background: var(--color-divider);
    color: var(--color-primary);
}

.c-filters__reset {
    align-self: center;
    font-size: 15px;
    color: var(--color-text);
    text-decoration: underline;
}

/* Gallery grid */

.c-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.c-gallery__tile {
    display: block;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    color: inherit;
}

.c-gallery__photo {
    aspect-ratio: 4 / 3;
    background-color: var(--color-divider);
    background-size: cover;
    background-position: center;
}

.c-gallery__placeholder {
    display: block;
    width: 100%;
    height: 100%;
}

.c-gallery__title {
    margin: 16px;
    font-size: 18px;
    border-bottom: 1px solid var(--color-divider);
    padding-bottom: 16px;
}

.c-gallery__values {
    margin: -8px 16px 16px;
    font-size: 14px;
    color: var(--color-text);
}

.c-gallery__empty {
    text-align: center;
    padding: 48px 0;
}

/* Detail */

.c-detail {
    max-width: 800px;
    margin: 0 auto;
}

.c-detail__back {
    display: inline-block;
    margin-bottom: 24px;
}

.c-detail__photo {
    aspect-ratio: 16 / 9;
    background-color: var(--color-divider);
    background-size: cover;
    background-position: center;
    margin-bottom: 24px;
}

.c-detail__params {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 24px;
}

.c-detail__params caption {
    text-align: left;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 8px;
}

.c-detail__params th,
.c-detail__params td {
    text-align: left;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-divider);
}

.c-detail__note {
    margin-bottom: 24px;
}

/* Error page */

.c-error {
    text-align: center;
    padding: 64px 0;
}

.c-error__code {
    font-size: 64px;
}

/* Footer */

.c-footer {
    background: var(--color-divider);
    color: var(--color-text);
    font-size: 14px;
}

.c-footer__inner {
    display: flex;
    justify-content: space-between;
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 24px;
}

.c-footer__link {
    color: var(--color-text);
}

.c-footer__link:hover {
    color: var(--color-text);
    text-decoration: underline;
}

@media (max-width: 900px) {
    .c-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .c-gallery {
        grid-template-columns: 1fr;
    }

    .c-header__top-inner {
        flex-direction: column;
        gap: 12px;
    }

    .c-header__hero {
        min-height: 220px;
    }

    .c-header__hero-inner {
        padding: 24px;
    }

    .c-header__tagline {
        font-size: 24px;
    }
}