/* mosun.xyz -- Coastal-blend, horizontal-scroll narrative */

:root {
    --color-ground: #F0F4F2;        /* Coastal Mist */
    --color-ground-soft: #E8EDEB;   /* Cool secondary ground */
    --color-ink: #1B3A4B;           /* Maritime Ink */
    --color-ink-deep: #0F2A36;      /* Night Shore */
    --color-ink-mid: #2B4F60;       /* Mid maritime ink, line strokes */
    --color-linen: #F5F0E8;         /* Driftwood Linen */
    --color-slate: #3A5A6B;         /* Slate Tide */
    --color-sage: #7FA891;          /* Salt Sage */
    --color-shell: #D4DDD8;         /* Shell Grey */
    --color-blush: #C4A882;         /* Protea Blush */

    --font-display: "Darker Grotesque", "Inter", "Helvetica Neue", Arial, sans-serif;
    --font-body: "Libre Baskerville", "Lora", Georgia, serif;
    --font-mono: "DM Mono", "Space Mono", "JetBrains Mono", monospace;

    --panel-count: 5;

    --ease-soft: cubic-bezier(0.25, 0.1, 0.25, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    background: var(--color-ground);
    color: var(--color-ink);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: geometricPrecision;
}

body {
    position: relative;
    cursor: default;
}

/* Paper grain texture overlay */
.paper-grain {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 4;
    opacity: 0.04;
    background-image:
        repeating-linear-gradient(0deg, var(--color-ink-mid) 0 1px, transparent 1px 4px),
        repeating-linear-gradient(90deg, var(--color-ink-mid) 0 1px, transparent 1px 4px);
    mix-blend-mode: multiply;
}

/* ----- Horizontal strip ----- */
.strip {
    display: flex;
    flex-direction: row;
    width: max-content;
    height: 100vh;
    will-change: transform;
    scroll-behavior: smooth;
    scroll-snap-type: x proximity;
    transform: translate3d(0, 0, 0);
}

.panel {
    position: relative;
    width: 100vw;
    height: 100vh;
    flex-shrink: 0;
    overflow: hidden;
    scroll-snap-align: start;
    padding: 6vh 8vw;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

/* Soft gradient bleed between panels */
.panel::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    height: 100%;
    width: 60px;
    pointer-events: none;
    z-index: 2;
}

.panel-arrival::after {
    background: linear-gradient(to right, rgba(240, 244, 242, 0), rgba(240, 244, 242, 1));
}
.panel-city::after {
    background: linear-gradient(to right, rgba(240, 244, 242, 0), rgba(240, 244, 242, 1));
}
.panel-coast::after {
    background: linear-gradient(to right, rgba(15, 42, 54, 0), rgba(245, 240, 232, 1));
}
.panel-detail::after {
    background: linear-gradient(to right, rgba(245, 240, 232, 0), rgba(232, 237, 235, 1));
}
.panel-horizon::after {
    background: none;
}

/* ----- Panel meta label (corner) ----- */
.panel-meta {
    position: absolute;
    top: 4vh;
    left: 4vw;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-sage);
    z-index: 3;
}

.panel-meta-light {
    color: var(--color-sage);
}

/* ----- Brand mark (top right) ----- */
.brand-mark {
    position: fixed;
    top: 4vh;
    right: 4vw;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.25rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-sage);
    pointer-events: none;
}

.brand-meta {
    opacity: 0.75;
}
.brand-id {
    color: var(--color-ink);
}

/* Adapt brand color when over dark panel (toggled by JS) */
body.dark-context .brand-id {
    color: var(--color-linen);
}

/* ----- Scroll hint (bottom right, fades after first scroll) ----- */
.scroll-hint {
    position: fixed;
    bottom: 6vh;
    right: 4vw;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-sage);
    pointer-events: none;
    transition: opacity 800ms var(--ease-soft);
}

.scroll-hint.faded {
    opacity: 0;
}

.hint-line {
    display: inline-block;
    width: 60px;
    height: 1px;
    background: var(--color-sage);
    position: relative;
    overflow: hidden;
}
.hint-line::after {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--color-ground);
    transform: translateX(-100%);
    animation: hintSweep 2.4s var(--ease-soft) infinite;
}

@keyframes hintSweep {
    0%   { transform: translateX(-100%); }
    50%  { transform: translateX(0); }
    100% { transform: translateX(100%); }
}

/* ----- Progress nav (bottom) ----- */
.progress-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    z-index: 11;
    pointer-events: auto;
    transition: height 400ms var(--ease-soft);
    background: rgba(212, 221, 216, 0.4);
}

.progress-nav:hover {
    height: 24px;
}

.progress-track {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: var(--color-sage);
    transition: width 80ms linear, opacity 200ms var(--ease-soft);
}

.panel-dots {
    position: absolute;
    inset: 0;
    list-style: none;
    display: flex;
    align-items: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 300ms var(--ease-soft);
}

.progress-nav:hover .panel-dots {
    opacity: 1;
}

.dot {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 1px;
    height: 14px;
    background: var(--color-ink);
    pointer-events: auto;
    cursor: pointer;
}

.dot.active {
    background: var(--color-sage);
    height: 18px;
    width: 2px;
}

.dot-label {
    position: absolute;
    top: -22px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.14em;
    color: var(--color-ink);
    white-space: nowrap;
    opacity: 0;
    transition: opacity 200ms var(--ease-soft);
}

.dot.active .dot-label,
.dot:hover .dot-label {
    opacity: 1;
}

/* Position dots evenly (5 panels) */
.dot[data-panel="0"] { left: 10%; }
.dot[data-panel="1"] { left: 30%; }
.dot[data-panel="2"] { left: 50%; }
.dot[data-panel="3"] { left: 70%; }
.dot[data-panel="4"] { left: 90%; }

/* ----- Wave parallax layer ----- */
.wave-layer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 200vw;
    height: 5vh;
    min-height: 60px;
    z-index: 1;
    pointer-events: none;
    will-change: transform;
}

.wave-svg {
    width: 100%;
    height: 100%;
    display: block;
}

.wave-path {
    fill: none;
    stroke: var(--color-sage);
    stroke-width: 1;
    opacity: 0.15;
}
.wave-path-1 { opacity: 0.20; }
.wave-path-2 { opacity: 0.13; stroke-dasharray: 4 6; }
.wave-path-3 { opacity: 0.10; }

/* On dark panels, lighten the waves */
body.dark-context .wave-path { stroke: var(--color-shell); }

/* ============================================================
   PANEL 1 -- Arrival
   ============================================================ */
.panel-arrival {
    background: var(--color-ground);
    align-items: center;
    justify-content: center;
}

.botanical-lavender {
    position: absolute;
    left: 0;
    top: 0;
    width: 70vw;
    height: 100vh;
    z-index: 1;
    overflow: visible;
}

.botanical-lavender .bot-stems path,
.botanical-lavender .bot-leaves path {
    fill: none;
    stroke: var(--color-ink-mid);
    stroke-width: 1.4;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.botanical-lavender .bot-blooms circle {
    fill: var(--color-ink-mid);
    opacity: 0.85;
}

.botanical-lavender .bot-stems-fade path {
    fill: none;
    stroke: var(--color-ink-mid);
    stroke-width: 1;
    opacity: 0.35;
    stroke-linecap: round;
}

.botanical-lavender .bot-blooms-fade circle {
    fill: var(--color-ink-mid);
    opacity: 0.3;
}

.arrival-text {
    position: relative;
    z-index: 3;
    text-align: center;
    width: 100%;
    padding: 0 4vw;
}

.display-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(3rem, 12vw, 16rem);
    line-height: 0.92;
    letter-spacing: -0.04em;
    color: var(--color-ink);
    display: block;
}

.display-title .word {
    display: inline-block;
}

.display-title .dot-mark {
    display: inline-block;
    color: var(--color-sage);
}

.arrival-tagline {
    margin-top: 2.5rem;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-sage);
}

/* ============================================================
   PANEL 2 -- The City
   ============================================================ */
.panel-city {
    background: var(--color-ground);
    align-items: flex-end;
    justify-content: flex-start;
    padding-bottom: 14vh;
}

.skyline {
    position: absolute;
    left: -5vw;
    bottom: 5vh;
    width: 130vw;
    height: 50vh;
    z-index: 1;
    overflow: visible;
}

.skyline path,
.skyline rect,
.skyline line {
    fill: none;
    stroke: var(--color-ink-mid);
    stroke-width: 1;
    stroke-linecap: square;
    stroke-linejoin: miter;
}

.skyline-back path {
    opacity: 0.45;
}

.skyline-front rect {
    fill: var(--color-ground);
}

.skyline-ground {
    stroke-width: 1;
    opacity: 0.9;
}

.city-text {
    position: relative;
    z-index: 3;
    width: min(48vw, 640px);
    margin-left: 7vw;
    margin-bottom: 8vh;
}

.eyebrow {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-sage);
    margin-bottom: 1.5rem;
}

.eyebrow-light {
    color: var(--color-blush);
}

.panel-city .display-title {
    font-size: clamp(2.4rem, 8vw, 9rem);
    line-height: 0.96;
    margin-bottom: 1.6rem;
}

.panel-city .display-title .word {
    display: inline-block;
    margin-right: 0.18em;
}

.body-text {
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 1.05vw, 1.18rem);
    line-height: 1.75;
    letter-spacing: 0.01em;
    color: var(--color-slate);
    max-width: 38ch;
}

/* ============================================================
   PANEL 3 -- The Coast
   ============================================================ */
.panel-coast {
    background: linear-gradient(to right, var(--color-ground) 0%, var(--color-ink-mid) 55%, var(--color-ink-deep) 100%);
    color: var(--color-linen);
    align-items: center;
    justify-content: flex-start;
}

.botanical-protea {
    position: absolute;
    right: 4vw;
    bottom: 6vh;
    width: 40vw;
    height: 60vh;
    max-width: 720px;
    z-index: 1;
    overflow: visible;
}

.botanical-protea .bot-stems path,
.botanical-protea .bot-leaves path,
.botanical-protea .bot-flower path,
.botanical-protea .bot-flower ellipse,
.botanical-protea .bot-flower line {
    fill: none;
    stroke: var(--color-linen);
    stroke-width: 1.2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.botanical-protea .bot-flower path {
    fill: rgba(245, 240, 232, 0.06);
}

.botanical-protea .bot-flower ellipse {
    fill: rgba(196, 168, 130, 0.08);
}

.botanical-protea .bot-wash {
    fill: rgba(196, 168, 130, 0.05);
    stroke: none;
}

.coast-text {
    position: relative;
    z-index: 3;
    width: min(46vw, 640px);
    margin-left: 5vw;
}

.display-title-light {
    color: var(--color-linen);
}

.body-text-light {
    color: var(--color-shell);
}

.panel-coast .display-title {
    font-size: clamp(2.4rem, 8vw, 9rem);
    line-height: 0.96;
    margin-bottom: 1.8rem;
}

.panel-coast .display-title .word {
    display: inline-block;
    margin-right: 0.18em;
}

.meta-line {
    margin-top: 2.5rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-sage);
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

/* ============================================================
   PANEL 4 -- The Detail
   ============================================================ */
.panel-detail {
    background: var(--color-linen);
    align-items: center;
    justify-content: center;
}

.panel-detail::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        repeating-linear-gradient(0deg, rgba(43, 79, 96, 0.1) 0 1px, transparent 1px 4px),
        repeating-linear-gradient(90deg, rgba(43, 79, 96, 0.1) 0 1px, transparent 1px 4px);
    opacity: 0.4;
    z-index: 1;
}

.initial-cap-bot {
    position: absolute;
    left: 12vw;
    top: 18vh;
    width: 8vw;
    min-width: 100px;
    height: auto;
    z-index: 2;
    opacity: 0.6;
}

.initial-cap-bot path,
.initial-cap-bot circle {
    fill: none;
    stroke: var(--color-ink-mid);
    stroke-width: 1;
    stroke-linecap: round;
}

.initial-cap-bot .bot-blooms circle {
    fill: var(--color-ink-mid);
}

.detail-text {
    position: relative;
    z-index: 3;
    max-width: 38ch;
    margin: 0 auto;
    padding: 0 4vw;
}

.detail-text .eyebrow {
    text-align: center;
    margin-bottom: 3rem;
}

.prose p {
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.85;
    letter-spacing: 0.01em;
    color: var(--color-slate);
    margin-bottom: 1.5rem;
}

.initial-cap {
    float: left;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 5.5rem;
    line-height: 0.85;
    color: var(--color-ink);
    padding-right: 0.55rem;
    padding-top: 0.45rem;
    margin-bottom: -0.2rem;
    letter-spacing: -0.04em;
}

.signature {
    margin-top: 2rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-sage);
    text-align: right;
}

/* ============================================================
   PANEL 5 -- The Horizon
   ============================================================ */
.panel-horizon {
    background: var(--color-ground-soft);
    align-items: center;
    justify-content: center;
}

.horizon-composition {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.horizon-rule {
    width: 60vw;
    height: 1px;
    background: var(--color-ink-mid);
    transform-origin: center;
    transform: scaleX(0);
    transition: transform 1800ms var(--ease-soft);
}

.horizon-rule.is-revealed {
    transform: scaleX(1);
}

.horizon-text {
    position: absolute;
    top: 56%;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    width: 60vw;
    padding-top: 2.4rem;
}

.horizon-text .eyebrow {
    margin-bottom: 1.4rem;
}

.horizon-line {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.3rem, 2.6vw, 3rem);
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--color-ink);
}

.horizon-meta {
    margin-top: 2.6rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-sage);
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: center;
}

.meta-separator {
    display: inline-block;
    width: 24px;
    height: 1px;
    background: var(--color-sage);
}

/* ============================================================
   FADE-REVEAL ANIMATIONS
   ============================================================ */
.reveal-text {
    opacity: 0;
    transform: translateX(40px);
    transition:
        opacity 800ms var(--ease-soft),
        transform 800ms var(--ease-soft);
    will-change: opacity, transform;
}

.reveal-text.is-revealed {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger child words in titles flagged with data-stagger */
[data-stagger] .word {
    opacity: 0;
    transform: translateX(40px);
    transition:
        opacity 800ms var(--ease-soft),
        transform 800ms var(--ease-soft);
}

[data-stagger].is-revealed .word {
    opacity: 1;
    transform: translateX(0);
}

[data-stagger].is-revealed .word:nth-child(1) { transition-delay: 0ms; }
[data-stagger].is-revealed .word:nth-child(2) { transition-delay: 80ms; }
[data-stagger].is-revealed .word:nth-child(3) { transition-delay: 160ms; }
[data-stagger].is-revealed .word:nth-child(4) { transition-delay: 240ms; }
[data-stagger].is-revealed .word:nth-child(5) { transition-delay: 320ms; }

[data-stagger] .dot-mark {
    opacity: 0;
    transition: opacity 600ms var(--ease-soft) 200ms;
}

[data-stagger].is-revealed .dot-mark {
    opacity: 1;
}

/* SVG path-draw reveal */
.reveal-svg path,
.reveal-svg ellipse,
.reveal-svg line,
.reveal-svg rect,
.reveal-svg circle {
    transition:
        stroke-dashoffset 2200ms var(--ease-soft),
        opacity 1400ms var(--ease-soft);
}

.reveal-svg .bot-stems path { transition-delay: 0ms; }
.reveal-svg .bot-leaves path { transition-delay: 400ms; }
.reveal-svg .bot-flower path,
.reveal-svg .bot-flower ellipse,
.reveal-svg .bot-flower line,
.reveal-svg .bot-blooms circle { transition-delay: 800ms; }
.reveal-svg .bot-stems-fade path,
.reveal-svg .bot-blooms-fade circle { transition-delay: 1100ms; }
.reveal-svg .skyline-back path { transition-delay: 0ms; }
.reveal-svg .skyline-front rect,
.reveal-svg .skyline-front line,
.reveal-svg .skyline-front path { transition-delay: 400ms; }
.reveal-svg .skyline-ground { transition-delay: 200ms; }

/* Initial state: paths hidden via stroke offset (set by JS) */
.reveal-svg circle:not(.is-revealed),
.reveal-svg ellipse:not(.is-revealed) {
    opacity: 0;
}

.reveal-svg.is-revealed circle,
.reveal-svg.is-revealed ellipse {
    opacity: 1;
}

/* ============================================================
   RESPONSIVE / SMALL VIEWPORTS
   ============================================================ */
@media (max-width: 720px) {
    .panel {
        padding: 4vh 6vw;
    }
    .city-text,
    .coast-text {
        width: 80vw;
        margin-left: 3vw;
    }
    .botanical-lavender { width: 90vw; }
    .botanical-protea { width: 65vw; right: 6vw; }
    .skyline { width: 180vw; left: -10vw; }
    .scroll-hint { bottom: 4vh; right: 6vw; }
    .brand-mark { top: 3vh; right: 6vw; }
    .panel-meta { top: 3vh; left: 6vw; }
    .horizon-rule { width: 78vw; }
}