/* ==============================================================
   PLЁS
   Landing page visual system
================================================================ */

:root {
    --color-forest-950: #0b2119;
    --color-forest-900: #102b21;
    --color-forest-800: #15382c;
    --color-forest-700: #1e4a39;

    --color-river: #416f78;
    --color-river-light: #7da1a5;

    --color-sand: #d7c5a0;
    --color-sand-light: #eee5d2;

    --color-stone: #62645d;

    --color-paper: #f7f5ef;
    --color-white: #ffffff;
    --color-dark: #15201b;

    --radius-sm: 0.75rem;
    --radius-md: 1.25rem;
    --radius-lg: 2rem;

    --shadow-soft:
        0 1rem 3rem rgba(11, 33, 25, 0.08);

    --section-space:
        clamp(4.5rem, 8vw, 8rem);
}


/* ==============================================================
   BASE
================================================================ */

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;

    color: var(--color-dark);
    background: var(--color-paper);

    font-family:
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;

    line-height: 1.6;

    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-underline-offset: 0.2em;
}

::selection {
    background: var(--color-sand);
    color: var(--color-forest-950);
}


/* ==============================================================
   ACCESSIBILITY
================================================================ */

.skip-link {
    position: fixed;

    top: 1rem;
    left: 1rem;

    z-index: 9999;

    padding: 0.75rem 1rem;

    color: var(--color-white);
    background: var(--color-forest-950);

    border-radius: var(--radius-sm);

    transform: translateY(-200%);
}

.skip-link:focus {
    transform: translateY(0);
}


/* ==============================================================
   TYPOGRAPHY
================================================================ */

.section-title {
    margin-bottom: 1.5rem;

    color: var(--color-forest-950);

    font-weight: 750;
    line-height: 1.05;
    letter-spacing: -0.035em;
}

.section-title--large {
    font-size: clamp(2.4rem, 6vw, 5.5rem);
}

.section-heading {
    max-width: 760px;
    margin-bottom: clamp(2rem, 5vw, 4rem);
}

.section-intro {
    max-width: 700px;
}


/* ==============================================================
   SECTIONS
================================================================ */

.section {
    position: relative;

    padding-top: var(--section-space);
    padding-bottom: var(--section-space);
}

.section--compact {
    padding-top: clamp(3rem, 6vw, 5rem);
    padding-bottom: clamp(3rem, 6vw, 5rem);
}

.section--dark {
    color: rgba(255, 255, 255, 0.88);
    background: var(--color-forest-950);
}

.section--dark .section-title {
    color: var(--color-white);
}

.section--soft {
    background: var(--color-sand-light);
}

.section--accent {
    background:
        linear-gradient(
            135deg,
            var(--color-river),
            var(--color-forest-800)
        );

    color: var(--color-white);
}

.section--accent .section-title {
    color: var(--color-white);
}


/* ==============================================================
   NAVIGATION
================================================================ */

.navbar {
    padding-top: 1.2rem;
    padding-bottom: 1.2rem;

    transition:
        background-color 180ms ease,
        padding 180ms ease,
        box-shadow 180ms ease;
}

.navbar--scrolled,
.navbar-collapse.show {
    background-color: rgba(11, 33, 25, 0.96);

    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);

    box-shadow:
        0 0.5rem 2rem rgba(0, 0, 0, 0.12);
}

.navbar--scrolled {
    padding-top: 0.8rem;
    padding-bottom: 0.8rem;
}

.brand {
    text-decoration: none;
}

.brand__name {
    color: var(--color-white);

    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}


/* ==============================================================
   HERO
================================================================ */

.hero {
    position: relative;

    min-height: 100svh;

    overflow: hidden;

    color: var(--color-white);
    background: var(--color-forest-950);
}

.hero__background {
    position: absolute;
    inset: 0;

    /*
     * CONTENT SLOT:
     * assets/img/hero.webp
     *
     * Изображение добавим отдельно.
     */
    background:
        linear-gradient(
            90deg,
            rgba(7, 25, 18, 0.92) 0%,
            rgba(7, 25, 18, 0.72) 40%,
            rgba(7, 25, 18, 0.30) 72%,
            rgba(7, 25, 18, 0.18) 100%
        ),
        radial-gradient(
            circle at 75% 35%,
            var(--color-river) 0%,
            var(--color-forest-700) 35%,
            var(--color-forest-950) 80%
        );

    background-position: center;
    background-size: cover;

    transform: scale(1.02);
}

.hero__content {
    max-width: 850px;

    padding-top: 7rem;
    padding-bottom: 7rem;
}

.brand-kicker {
    margin-bottom: 1rem;

    color: var(--color-sand);

    font-size: clamp(1.2rem, 2vw, 1.6rem);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero__title {
    max-width: 900px;

    margin-bottom: 1.5rem;

    font-size: clamp(3rem, 9vw, 7rem);

    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -0.055em;
}

.hero__motto {
    max-width: 700px;

    margin-bottom: 0;

    color: rgba(255, 255, 255, 0.82);

    font-size: clamp(1.15rem, 2.5vw, 1.65rem);
}

.hero__description {
    max-width: 680px;

    margin-top: 1.5rem;

    font-size: clamp(1rem, 2vw, 1.25rem);
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;

    margin-top: 2rem;
}

.hero__bottom {
    position: absolute;

    right: 0;
    bottom: -1px;
    left: 0;

    height: clamp(2rem, 5vw, 5rem);

    background: var(--color-paper);

    clip-path: polygon(
        0 70%,
        32% 25%,
        60% 60%,
        100% 15%,
        100% 100%,
        0 100%
    );
}


/* ==============================================================
   PLACEHOLDERS
================================================================ */

.media-placeholder {
    position: relative;

    overflow: hidden;

    min-height: 220px;

    background:
        linear-gradient(
            135deg,
            rgba(21, 56, 44, 0.18),
            rgba(65, 111, 120, 0.3)
        );

    border-radius: var(--radius-md);
}

.media-placeholder::after {
    position: absolute;

    content: "";

    inset: 0;

    background:
        linear-gradient(
            110deg,
            transparent 35%,
            rgba(255, 255, 255, 0.14) 50%,
            transparent 65%
        );

    transform: translateX(-100%);

    animation: placeholder-shine 3s infinite;
}

@keyframes placeholder-shine {
    100% {
        transform: translateX(100%);
    }
}

.content-skeleton {
    width: 100%;
    height: 0.75rem;

    margin-bottom: 0.7rem;

    background: rgba(21, 56, 44, 0.12);

    border-radius: 100px;
}

.content-skeleton--short {
    width: 55%;
}

.content-skeleton--title {
    width: 70%;
    height: 1.25rem;

    margin-bottom: 1rem;
}

.content-skeleton--icon {
    width: 3rem;
    height: 3rem;

    margin-bottom: 1.5rem;

    border-radius: 50%;
}


/* ==============================================================
   FACTS
================================================================ */

.facts {
    background: var(--color-paper);
}

.fact-card {
    height: 100%;

    padding: clamp(1.2rem, 3vw, 2rem);

    background: var(--color-white);

    border: 1px solid rgba(21, 56, 44, 0.08);
    border-radius: var(--radius-md);

    box-shadow: var(--shadow-soft);
}


/* ==============================================================
   ROUTES
================================================================ */

.routes {
    background: var(--color-paper);
}

.route-card {
    height: 100%;

    overflow: hidden;

    background: var(--color-white);

    border: 1px solid rgba(21, 56, 44, 0.08);
    border-radius: var(--radius-lg);

    box-shadow: var(--shadow-soft);

    transition:
        transform 180ms ease,
        box-shadow 180ms ease;
}

.route-card:hover {
    transform: translateY(-0.35rem);

    box-shadow:
        0 1.5rem 4rem rgba(11, 33, 25, 0.13);
}

.route-card__image {
    min-height: 280px;

    border-radius: 0;
}

.route-card__body {
    padding: clamp(1.5rem, 4vw, 2rem);
}

.route-card__title {
    margin-bottom: 1rem;

    font-weight: 750;
}

.route-card__meta {
    margin-bottom: 1rem;
}

.route-card__actions {
    margin-top: 1.5rem;
}


/* ==============================================================
   NATURE
================================================================ */

.nature-section {
    overflow: hidden;
}

.nature-section__image {
    min-height: clamp(320px, 60vw, 620px);

    border-radius:
        45% 55% 50% 50%
        / 40% 40% 60% 60%;
}


/* ==============================================================
   ABOUT
================================================================ */

.gallery-tile {
    min-height: 220px;
}

.gallery-tile--large {
    min-height: 456px;
}


/* ==============================================================
   PROCESS
================================================================ */

.process-card {
    position: relative;

    height: 100%;

    padding: 2rem;

    border-top: 1px solid rgba(21, 56, 44, 0.2);
}

.process-card__number {
    margin-bottom: 2rem;

    color: var(--color-river);

    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 0.12em;
}


/* ==============================================================
   INCLUDED
================================================================ */

.included {
    background: var(--color-white);
}

.included-list {
    padding: 0;
    margin: 0;

    list-style: none;
}


/* ==============================================================
   SAFETY
================================================================ */

.safety-image {
    min-height: 500px;

    background:
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.22),
            rgba(255, 255, 255, 0.06)
        );

    border: 1px solid rgba(255, 255, 255, 0.2);
}


/* ==============================================================
   GALLERY
================================================================ */

.gallery-grid {
    display: grid;

    grid-template-columns: repeat(12, 1fr);
    grid-auto-rows: 190px;

    gap: 1rem;
}

.gallery-grid__item {
    min-height: 0;
}

.gallery-grid__item--1 {
    grid-column: span 7;
    grid-row: span 2;
}

.gallery-grid__item--2 {
    grid-column: span 5;
}

.gallery-grid__item--3 {
    grid-column: span 5;
}

.gallery-grid__item--4 {
    grid-column: span 4;
}

.gallery-grid__item--5 {
    grid-column: span 8;
}


/* ==============================================================
   REVIEWS
================================================================ */

.review-card {
    height: 100%;

    padding: clamp(1.5rem, 4vw, 2.25rem);

    background: rgba(255, 255, 255, 0.65);

    border: 1px solid rgba(21, 56, 44, 0.08);
    border-radius: var(--radius-md);
}


/* ==============================================================
   FAQ
================================================================ */

.faq .accordion {
    --bs-accordion-bg: transparent;
    --bs-accordion-border-color: rgba(21, 56, 44, 0.16);
}


/* ==============================================================
   FINAL CTA
================================================================ */

.final-cta {
    position: relative;

    overflow: hidden;

    color: var(--color-white);
    background: var(--color-forest-950);

    padding-top: clamp(6rem, 12vw, 11rem);
    padding-bottom: clamp(6rem, 12vw, 11rem);
}

.final-cta__background {
    position: absolute;
    inset: 0;

    background:
        radial-gradient(
            circle at 10% 10%,
            rgba(65, 111, 120, 0.55),
            transparent 38%
        ),
        radial-gradient(
            circle at 90% 90%,
            rgba(215, 197, 160, 0.16),
            transparent 42%
        );
}

.final-cta .section-title {
    color: var(--color-white);
}


/* ==============================================================
   CONTACTS
================================================================ */

.contacts {
    background: var(--color-white);
}

.contacts__data {
    font-style: normal;
}

.map-placeholder {
    min-height: 430px;

    background:
        linear-gradient(
            135deg,
            var(--color-sand-light),
            rgba(65, 111, 120, 0.25)
        );

    border-radius: var(--radius-lg);
}


/* ==============================================================
   FOOTER
================================================================ */

.footer {
    padding-top: 4rem;
    padding-bottom: 2rem;

    color: rgba(255, 255, 255, 0.72);
    background: var(--color-forest-950);
}

.footer__brand {
    margin-bottom: 0.5rem;

    color: var(--color-white);

    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.footer__motto {
    max-width: 300px;
}

.footer__bottom {
    margin-top: 4rem;
    padding-top: 1.5rem;

    border-top: 1px solid rgba(255, 255, 255, 0.12);

    font-size: 0.9rem;
}


/* ==============================================================
   MOBILE
================================================================ */

@media (max-width: 991.98px) {

    .navbar-collapse {
        margin-top: 0.75rem;
        padding: 1rem;

        background: rgba(11, 33, 25, 0.97);

        border-radius: var(--radius-md);
    }

    .hero__background {
        background:
            linear-gradient(
                rgba(7, 25, 18, 0.72),
                rgba(7, 25, 18, 0.9)
            ),
            radial-gradient(
                circle at 60% 25%,
                var(--color-river),
                var(--color-forest-950) 70%
            );
    }

    .gallery-grid {
        grid-auto-rows: 160px;
    }

}


@media (max-width: 767.98px) {

    :root {
        --section-space: 4.5rem;
    }

    .hero__content {
        padding-top: 8rem;
        padding-bottom: 6rem;
    }

    .hero__title {
        font-size: clamp(3rem, 15vw, 5rem);
    }

    .fact-card {
        padding: 1.25rem;
    }

    .route-card__image {
        min-height: 220px;
    }

    .nature-section__image {
        min-height: 340px;
    }

    .gallery-tile--large {
        min-height: 360px;
    }

    .gallery-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;

        grid-auto-rows: 170px;
    }

    .gallery-grid__item--1,
    .gallery-grid__item--2,
    .gallery-grid__item--3,
    .gallery-grid__item--4,
    .gallery-grid__item--5 {
        grid-column: auto;
        grid-row: auto;
    }

    .gallery-grid__item--1 {
        grid-column: 1 / -1;
        grid-row: span 2;
    }

    .gallery-grid__item--5 {
        grid-column: 1 / -1;
    }

    .safety-image {
        min-height: 340px;
    }

    .map-placeholder {
        min-height: 320px;
    }

}


@media (max-width: 575.98px) {

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .gallery-grid__item--1,
    .gallery-grid__item--5 {
        grid-column: auto;
        grid-row: auto;
    }

    .gallery-grid__item {
        min-height: 230px;
    }

}


/* ==============================================================
   REDUCED MOTION
================================================================ */

@media (prefers-reduced-motion: reduce) {

    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

}