/* ================= tokens ================= */

@font-face {
    font-family: 'Departure Mono';
    src: url('fonts/DepartureMono-Regular.woff2') format('woff2');
    font-weight: 400;
    font-display: swap;
}
@font-face {
    font-family: 'Plex Mono';
    src: url('fonts/IBMPlexMono-Regular.woff2') format('woff2');
    font-weight: 400;
    font-display: swap;
}
@font-face {
    font-family: 'Plex Mono';
    src: url('fonts/IBMPlexMono-Bold.woff2') format('woff2');
    font-weight: 700;
    font-display: swap;
}

:root {
    --void: #050807;
    --dusk: #0a1220;
    --phosphor: #2bff64;
    --phosphor-dim: #17a344;
    --alpenglow: #ffad7e;
    --ridge-blue: #7fa0c8;
    --snowfield: #eff3f4;
    --signal-red: #ff4b3a;
    --ink: #d7e0da;

    --mono-px: 'Departure Mono', 'Plex Mono', monospace;
    --mono: 'Plex Mono', ui-monospace, monospace;

    --crt-a: 1;          /* scanline overlay strength, driven by scroll */
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { background: var(--void); }

body {
    margin: 0;
    background: var(--void);
    color: var(--ink);
    font-family: var(--mono);
    font-size: 15px;
    line-height: 1.6;
}

::selection { background: var(--phosphor); color: var(--void); }

a { color: var(--phosphor); }
a:hover { color: var(--snowfield); }
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--phosphor);
    outline-offset: 2px;
}

/* ================= CRT overlay ================= */

.crt {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 40;
    opacity: var(--crt-a);
    background:
        repeating-linear-gradient(0deg,
            rgba(0, 0, 0, 0.22) 0px, rgba(0, 0, 0, 0.22) 1px,
            transparent 1px, transparent 3px);
    box-shadow: inset 0 0 18vw rgba(0, 0, 0, 0.75);
}
@media (prefers-reduced-motion: no-preference) {
    .crt { animation: crt-drift 9s linear infinite; }
    @keyframes crt-drift {
        0%   { background-position: 0 0; }
        100% { background-position: 0 24px; }
    }
}

/* ================= elevation HUD ================= */

#hud {
    position: fixed;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--phosphor);
    font-family: var(--mono-px);
    font-size: 10px;
    letter-spacing: 0.08em;
    text-shadow: 0 0 6px rgba(43, 255, 100, 0.45);
}
.hud-rail {
    position: relative;
    width: 7px;
    height: 42vh;
    background: repeating-linear-gradient(0deg,
        currentColor 0px, currentColor 1px,
        transparent 1px, transparent 8px);
    opacity: 0.9;
}
.hud-needle {
    position: absolute;
    left: -4px;
    top: 0;
    width: 15px;
    height: 2px;
    background: var(--signal-red);
    box-shadow: 0 0 6px var(--signal-red);
}
.hud-read {
    writing-mode: vertical-rl;
    white-space: nowrap;
}
#hud.warm { color: var(--alpenglow); text-shadow: 0 0 6px rgba(255, 173, 126, 0.4); }

@media (max-width: 760px) { #hud { display: none; } }

/* ================= tty ================= */

#boot {
    position: relative;
    height: 100svh;
    display: flex;
    flex-direction: column;
    padding: clamp(14px, 3vw, 40px);
}

.tty-status {
    font-family: var(--mono-px);
    font-size: 11px;
    color: var(--phosphor-dim);
    letter-spacing: 0.1em;
    margin-bottom: 1.2em;
    user-select: none;
}

#term {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--phosphor-dim) transparent;
    color: var(--phosphor);
    text-shadow: 0 0 6px rgba(43, 255, 100, 0.4);
    font-size: 14px;
    cursor: text;
}

#term-out .line { min-height: 1.6em; white-space: pre-wrap; word-break: break-word; }
#term-out .dim     { color: var(--phosphor-dim); text-shadow: none; }
#term-out .ok      { color: var(--snowfield); }
#term-out .err     { color: var(--signal-red); text-shadow: 0 0 6px rgba(255, 75, 58, 0.4); }
#term-out .echo    { color: var(--snowfield); }
#term-out .art     { line-height: 1.25; }
#term-out a        { color: var(--phosphor); text-decoration: underline; }
#term-out a:hover  { color: var(--snowfield); }

#term-form {
    display: flex;
    align-items: baseline;
    gap: 0.6ch;
}
.prompt-label { color: var(--phosphor); user-select: none; }
#term-in {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--snowfield);
    font: inherit;
    text-shadow: inherit;
    caret-color: var(--phosphor);
    padding: 0;
}
#term-in:focus { outline: none; }

#chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 14px;
}
#chips button {
    font-family: var(--mono-px);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--phosphor);
    background: rgba(43, 255, 100, 0.06);
    border: 1px solid var(--phosphor-dim);
    padding: 4px 10px;
    cursor: pointer;
}
#chips button:hover {
    background: var(--phosphor);
    color: var(--void);
    text-shadow: none;
}

.scroll-hint {
    font-family: var(--mono-px);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--phosphor-dim);
    text-align: center;
    padding-top: 10px;
    user-select: none;
}
@media (prefers-reduced-motion: no-preference) {
    .scroll-hint { animation: hint-pulse 2.2s ease-in-out infinite; }
    @keyframes hint-pulse {
        0%, 100% { opacity: 0.45; }
        50%      { opacity: 1; }
    }
}

/* ================= the resolve ================= */

#resolve {
    position: relative;
    height: 320vh;
}
.resolve-pin {
    position: sticky;
    top: 0;
    height: 100svh;
    overflow: hidden;
}
#resolve-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}
#resolve-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: none;
}
#resolve.no-canvas #resolve-canvas { display: none; }
#resolve.no-canvas #resolve-img { display: block; }

.resolve-progress {
    position: absolute;
    top: 18px;
    right: 20px;
    font-family: var(--mono-px);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--phosphor);
    text-shadow: 0 0 6px rgba(43, 255, 100, 0.45);
    opacity: 0;
    transition: opacity 0.4s;
}
.resolve-pin.resolving .resolve-progress { opacity: 1; }

.resolve-caption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 60px clamp(16px, 4vw, 48px) 22px;
    background: linear-gradient(transparent, rgba(5, 8, 7, 0.82));
    font-family: var(--mono-px);
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--snowfield);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.7s, transform 0.7s;
}
.resolve-caption .cap-time { color: var(--alpenglow); }
.resolve-pin.resolved .resolve-caption { opacity: 1; transform: none; }

/* ============ below treeline: shared section styling ============ */

#log, #about, footer {
    position: relative;
    background: linear-gradient(180deg, var(--void) 0%, var(--dusk) 26%, var(--dusk) 100%);
}
#about, footer { background: var(--dusk); }

.section-head {
    max-width: 980px;
    margin: 0 auto;
    padding: clamp(60px, 10vh, 130px) 20px 30px;
}
.cmdline {
    font-family: var(--mono-px);
    font-weight: 400;
    font-size: clamp(15px, 2.4vw, 21px);
    letter-spacing: 0.04em;
    color: var(--snowfield);
    margin: 0 0 6px;
}
.ps1 { color: var(--alpenglow); }
.comment { color: var(--ridge-blue); margin: 0; font-size: 13px; }

/* ================= summit log ================= */

.entry {
    max-width: 980px;
    margin: 0 auto;
    padding: clamp(30px, 6vh, 70px) 20px;
}
.entry figure { margin: 0; }
.entry img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid rgba(127, 160, 200, 0.25);
}
.entry:nth-of-type(odd) figure  { margin-right: clamp(0px, 6vw, 90px); }
.entry:nth-of-type(even) figure { margin-left: clamp(0px, 6vw, 90px); }

.exif {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 18px;
    justify-content: space-between;
    padding: 8px 2px;
    font-family: var(--mono-px);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--ridge-blue);
}
.exif .stamp { color: var(--alpenglow); }

.entry-note {
    max-width: 560px;
    margin: 14px 2px 0;
    color: var(--ink);
}
.entry:nth-of-type(even) .entry-note { margin-left: auto; text-align: right; }
.entry:nth-of-type(even) .exif { flex-direction: row-reverse; }

.mount-note {
    max-width: 980px;
    margin: 0 auto;
    padding: clamp(40px, 8vh, 90px) 20px 0;
}

/* ================= about ================= */

.about-grid {
    max-width: 980px;
    margin: 0 auto;
    padding: 10px 20px clamp(60px, 10vh, 120px);
    display: grid;
    grid-template-columns: minmax(240px, 380px) 1fr;
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
}
@media (max-width: 760px) {
    .about-grid { grid-template-columns: 1fr; }
}

.viewfinder { margin: 0; }
.vf-frame { position: relative; }
.viewfinder img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid rgba(127, 160, 200, 0.25);
}
.vf-frame::before,
.vf-frame::after {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    pointer-events: none;
}
.vf-frame::before {
    top: -5px; left: -5px;
    border-top: 2px solid var(--alpenglow);
    border-left: 2px solid var(--alpenglow);
}
.vf-frame::after {
    bottom: -5px; right: -5px;
    border-bottom: 2px solid var(--alpenglow);
    border-right: 2px solid var(--alpenglow);
}

.about-text p { margin: 0 0 1.2em; }

.ls-links {
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.9;
    margin: 1.6em 0 0;
    padding: 14px 16px;
    border: 1px solid rgba(127, 160, 200, 0.25);
    background: rgba(5, 8, 7, 0.5);
    overflow-x: auto;
}
.ls-links .perm { color: var(--ridge-blue); }
.ls-links .arrow { color: var(--alpenglow); }
.ls-links a { color: var(--snowfield); }
.ls-links a:hover { color: var(--alpenglow); }

/* ================= footer ================= */

footer {
    padding: clamp(50px, 10vh, 110px) 20px clamp(30px, 6vh, 60px);
    text-align: center;
}
footer .cmdline { font-size: 15px; }
footer .dim { color: var(--ridge-blue); margin: 4px 0 0; }
.colophon {
    margin-top: 56px;
    font-size: 11px;
    letter-spacing: 0.06em;
    color: rgba(127, 160, 200, 0.55);
}

/* ================= reveals ================= */

.reveal { opacity: 0; transform: translateY(26px); }
.reveal.in {
    opacity: 1;
    transform: none;
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; }
}