/* /peaks: the whole list first, then a few favourites as rendered tiles. Any
   summit opens in a full-screen viewer that renders it from real terrain. */

:root {
    --ink: #f4f1ea;
    --ink-2: rgba(244, 241, 234, .72);
    --ink-3: rgba(244, 241, 234, .48);
    --rule: rgba(244, 241, 234, .16);
    --rule-strong: rgba(244, 241, 234, .3);
    --night: #0b0d14;
    --accent: #f2b48a;
    --display: "Anton", "Impact", "Haettenschweiler", sans-serif;
    --sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
    --gutter: clamp(20px, 5vw, 80px);
    --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }

html { background: var(--night); }
html.viewer-open { overflow: hidden; }

body {
    margin: 0;
    background: var(--night);
    color: var(--ink);
    font-family: var(--sans);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--ink);
    outline-offset: 4px;
}

/* The Whitney still, faded in behind the top of the page. */
.backdrop {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 92vh;
    background: url("/img/peaks/mount-whitney.jpg") center 40% / cover no-repeat;
    opacity: .38;
    -webkit-mask-image: linear-gradient(180deg, #000 10%, transparent 100%);
    mask-image: linear-gradient(180deg, #000 10%, transparent 100%);
    pointer-events: none;
}

.grain {
    position: fixed;
    inset: -50%;
    z-index: 30;
    pointer-events: none;
    opacity: .06;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}

.top {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    padding: max(20px, env(safe-area-inset-top)) var(--gutter) 0;
    font: 500 12px/1 var(--mono);
    letter-spacing: .08em;
    text-transform: uppercase;
}

.top a {
    text-decoration: none;
    opacity: .75;
    transition: opacity .2s;
}

.top a:hover { opacity: 1; }

.page {
    position: relative;
    z-index: 1;
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--gutter);
}

.kicker {
    margin: 0 0 16px;
    color: var(--ink-2);
    font: 500 12px/1 var(--mono);
    letter-spacing: .14em;
    text-transform: uppercase;
}

/* ---------- The list ---------- */

.intro { padding: clamp(64px, 14vh, 150px) 0 0; }

.intro__title,
.featured__title {
    margin: 0;
    font: 400 clamp(64px, 11vw, 168px)/.86 var(--display);
    letter-spacing: -.005em;
    text-transform: uppercase;
}

.intro__sub,
.featured__sub {
    max-width: 560px;
    margin: 24px 0 0;
    color: var(--ink-2);
    font-size: clamp(16px, 1.3vw, 18px);
    line-height: 1.55;
}

.list {
    margin: clamp(40px, 7vh, 72px) 0 0;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--rule-strong);
}

.row {
    position: relative;
    display: grid;
    grid-template-columns: 44px minmax(0, 1.3fr) minmax(0, 1fr) 96px 52px;
    gap: 20px;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--rule);
    text-decoration: none;
    isolation: isolate;
    transition: padding .35s var(--ease);
}

.row::before {
    content: "";
    position: absolute;
    inset: 0 calc(-1 * clamp(10px, 1.5vw, 20px));
    z-index: -1;
    border-radius: 6px;
    background: rgba(244, 241, 234, .06);
    opacity: 0;
    transition: opacity .2s;
}

.row:hover::before,
.row:focus-visible::before { opacity: 1; }

.row__num,
.row__elev,
.row__go {
    color: var(--ink-3);
    font: 500 12px/1 var(--mono);
    font-variant-numeric: tabular-nums;
}

.row__name {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 14px;
    min-width: 0;
}

.row__title {
    font-size: clamp(17px, 1.5vw, 20px);
    font-weight: 500;
}

.row__name small {
    color: var(--ink-3);
    font: 400 12px/1.3 var(--mono);
}

/* Repeat climbs get a quiet count badge. */
.row__badge {
    display: inline-block;
    margin-left: 10px;
    padding: 3px 7px 2px;
    vertical-align: 2px;
    border: 1px solid var(--rule-strong);
    border-radius: 999px;
    color: var(--ink-2);
    font: 500 11px/1 var(--mono);
    letter-spacing: .04em;
}

/* Each summit's height against Whitney's. */
.row__bar {
    height: 2px;
    background: var(--rule);
}

.row__bar span {
    display: block;
    height: 100%;
    background: var(--ink-2);
    transform-origin: left;
    transition: background .2s;
}

.row:hover .row__bar span { background: var(--accent); }

.row__elev {
    color: var(--ink-2);
    text-align: right;
}

.row__go {
    text-align: right;
    letter-spacing: .1em;
    text-transform: uppercase;
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity .2s, transform .3s var(--ease);
}

.row:hover .row__go,
.row:focus-visible .row__go { opacity: 1; transform: none; color: var(--ink); }

/* ---------- Tiles ---------- */

.featured { padding: clamp(96px, 16vh, 180px) 0 0; }

.featured__title { font-size: clamp(48px, 7vw, 108px); }

.tiles {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    grid-auto-rows: clamp(220px, 24vw, 340px);
    gap: clamp(10px, 1.2vw, 16px);
    margin: clamp(36px, 6vh, 60px) 0 0;
    padding: 0;
    list-style: none;
}

.tile { grid-column: span 2; }
.tile--lead { grid-column: span 4; grid-row: span 2; }

.tile__link {
    position: relative;
    display: block;
    height: 100%;
    overflow: hidden;
    border-radius: 10px;
    background: #1a1c24;
    text-decoration: none;
    isolation: isolate;
}

.tile__img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.02);
    transition: transform 1.6s var(--ease), filter .6s ease;
}

.tile__link:hover .tile__img,
.tile__link:focus-visible .tile__img { transform: scale(1.07); }

.tile__shade {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(5, 6, 10, .25), transparent 30%, transparent 50%, rgba(5, 6, 10, .72));
}

.tile__meta {
    position: absolute;
    right: 20px;
    bottom: 18px;
    left: 20px;
    display: grid;
    gap: 6px;
}

.tile__kicker {
    color: var(--ink-2);
    font: 500 11px/1 var(--mono);
    letter-spacing: .1em;
    text-transform: uppercase;
}

.tile__name {
    font: 400 clamp(28px, 2.8vw, 40px)/.95 var(--display);
    text-transform: uppercase;
}

.tile--lead .tile__name { font-size: clamp(44px, 5.6vw, 88px); }

.tile__note {
    color: var(--ink-2);
    font-size: 14px;
    line-height: 1.3;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity .3s, transform .4s var(--ease);
}

.tile--lead .tile__note,
.tile__link:hover .tile__note,
.tile__link:focus-visible .tile__note { opacity: 1; transform: none; }

.tile__open {
    position: absolute;
    top: 16px;
    right: 16px;
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border: 1px solid rgba(244, 241, 234, .4);
    border-radius: 50%;
    background: rgba(5, 6, 10, .2);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    font-size: 15px;
    transition: background .25s, color .25s, transform .35s var(--ease);
}

.tile__link:hover .tile__open {
    background: var(--ink);
    color: var(--night);
    transform: rotate(45deg);
}

.credit {
    padding: clamp(80px, 12vh, 140px) 0 48px;
    color: var(--ink-3);
    font: 400 11px/1.6 var(--mono);
}

.credit p { margin: 0; }

/* ---------- Viewer ---------- */

.viewer {
    position: fixed;
    inset: 0;
    z-index: 20;
    overflow: hidden;
    background: var(--night);
    opacity: 0;
    transition: opacity .45s ease;
}

.viewer.is-open { opacity: 1; }

.viewer #scene {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
}

.viewer__vignette {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(120% 90% at 50% 45%, transparent 55%, rgba(5, 6, 10, .5) 100%),
        linear-gradient(180deg, rgba(5, 6, 10, .35), transparent 22%, transparent 55%, rgba(5, 6, 10, .62));
}

/* Text arrives once the mountain has. */
.viewer__elev,
.viewer__title,
.viewer__facts {
    position: absolute;
    opacity: 0;
    transform: translateY(14px);
    transition: opacity .8s ease, transform 1s var(--ease);
}

.viewer.is-ready .viewer__elev,
.viewer.is-ready .viewer__title,
.viewer.is-ready .viewer__facts {
    opacity: 1;
    transform: none;
}

.viewer.is-ready .viewer__title { transition-delay: .1s; }
.viewer.is-ready .viewer__facts { transition-delay: .2s; }

.viewer__elev {
    top: 13vh;
    right: clamp(24px, 6vw, 100px);
    margin: 0;
    color: transparent;
    font: 400 clamp(90px, 18vw, 300px)/.85 var(--display);
    -webkit-text-stroke: 1.5px rgba(244, 241, 234, .45);
    pointer-events: none;
}

.viewer__elev small {
    font-size: .32em;
    -webkit-text-stroke-width: 1px;
}

.viewer__title {
    right: var(--gutter);
    bottom: clamp(140px, 20vh, 210px);
    left: var(--gutter);
}

.viewer__kicker {
    margin: 0 0 14px;
    color: var(--ink-2);
    font: 500 12px/1 var(--mono);
    letter-spacing: .14em;
    text-transform: uppercase;
}

.viewer__name {
    margin: 0;
    font: 400 var(--name-size, 11vw)/.86 var(--display);
    text-transform: uppercase;
    text-shadow: 0 2px 30px rgba(0, 0, 0, .35), 0 0 2px rgba(0, 0, 0, .25);
    white-space: nowrap;
}

.viewer__facts {
    right: var(--gutter);
    bottom: clamp(40px, 7vh, 72px);
    left: var(--gutter);
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 14px clamp(20px, 3vw, 44px);
    padding-top: 16px;
    border-top: 1px solid var(--rule-strong);
}

.viewer__facts dl { display: contents; }

.viewer__facts dt {
    margin-bottom: 7px;
    color: var(--ink-3);
    font: 500 10px/1 var(--mono);
    letter-spacing: .14em;
    text-transform: uppercase;
}

.viewer__facts dd {
    margin: 0;
    font: 500 14px/1.2 var(--mono);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.viewer__facts dd:has(.ascent) {
    display: flex;
    gap: 6px;
}

/* One switch per ascent; the snow follows the season of the one picked. */
.ascent {
    padding: 7px 11px 6px;
    border: 1px solid var(--rule-strong);
    border-radius: 999px;
    background: rgba(5, 6, 10, .25);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--ink-2);
    font: 500 12px/1 var(--mono);
    cursor: pointer;
    transition: background .2s, color .2s, border-color .2s;
}

.ascent:hover { border-color: var(--ink); color: var(--ink); }

.ascent[aria-pressed="true"] {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--night);
}

.viewer__link {
    margin-left: auto;
    padding: 10px 14px;
    border: 1px solid var(--rule-strong);
    border-radius: 999px;
    font: 500 11px/1 var(--mono);
    letter-spacing: .1em;
    text-decoration: none;
    text-transform: uppercase;
    white-space: nowrap;
    transition: background .2s, color .2s, border-color .2s;
}

.viewer__link:hover {
    border-color: var(--ink);
    background: var(--ink);
    color: var(--night);
}

.viewer__bar {
    position: absolute;
    top: max(16px, env(safe-area-inset-top));
    right: clamp(16px, 3vw, 40px);
    left: clamp(16px, 3vw, 40px);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
}

.viewer__count {
    margin: 0 6px;
    font: 500 12px/1 var(--mono);
    letter-spacing: .08em;
    font-variant-numeric: tabular-nums;
}

.viewer__btn {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid var(--rule-strong);
    border-radius: 50%;
    background: rgba(5, 6, 10, .25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--ink);
    font: 400 16px/1 var(--sans);
    cursor: pointer;
    transition: background .2s, color .2s, border-color .2s;
}

.viewer__btn:hover {
    border-color: var(--ink);
    background: var(--ink);
    color: var(--night);
}

.viewer__close { margin-left: 10px; }

.loader {
    position: absolute;
    bottom: 28px;
    left: 50%;
    margin: 0;
    padding: 9px 14px 9px 30px;
    border: 1px solid var(--rule-strong);
    border-radius: 999px;
    background: rgba(11, 13, 20, .45);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    font: 500 11px/1 var(--mono);
    letter-spacing: .1em;
    text-transform: uppercase;
    transform: translateX(-50%);
    transition: opacity .4s ease;
}

.loader::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 12px;
    width: 8px;
    height: 8px;
    margin-top: -4px;
    border-radius: 50%;
    background: var(--ink);
    animation: pulse 1s ease-in-out infinite alternate;
}

.loader.is-hidden { opacity: 0; pointer-events: none; }

@keyframes pulse { to { opacity: .2; transform: scale(.6); } }

.noscript {
    max-width: 520px;
    margin: 0 auto;
    padding: 0 24px 48px;
}

/* ---------- Small screens ---------- */

@media (max-width: 900px) {
    .tiles {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        grid-auto-rows: clamp(200px, 52vw, 320px);
    }
    .tile { grid-column: span 1; }
    .tile--lead { grid-column: span 2; grid-row: span 1; }
}

@media (max-width: 640px) {
    .row {
        grid-template-columns: 30px minmax(0, 1fr) auto;
        grid-template-areas: "num name elev" ". bar bar";
        gap: 8px 12px;
        padding: 13px 0;
    }
    .row__num { grid-area: num; }
    .row__name { grid-area: name; flex-direction: column; gap: 3px; }
    .row__elev { grid-area: elev; }
    .row__bar { grid-area: bar; }
    .row__go { display: none; }

    .tiles { grid-template-columns: 1fr; grid-auto-rows: 64vw; }
    .tile--lead { grid-column: span 1; }
    .tile__note { opacity: 1; transform: none; }

    .viewer__elev { top: 12vh; right: 18px; -webkit-text-stroke-width: 1px; }
    .viewer__title { bottom: 200px; }
    .viewer__facts { bottom: calc(env(safe-area-inset-bottom) + 24px); gap: 14px 22px; }
    .viewer__facts dd { font-size: 12px; }
    .viewer__link { margin-left: 0; }
    .viewer__btn { width: 38px; height: 38px; }
}

@media (prefers-reduced-motion: reduce) {
    .loader::before { animation: none; }
    .tile__img,
    .viewer,
    .viewer__elev,
    .viewer__title,
    .viewer__facts { transition: none; }
}