/* ============================================
   longitude.day — Anti-Design Meridian Clock
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --black-deep: #0a0a0f;
    --black: #0f0f14;
    --dark: #14141f;
    --dark-surface: #1a1a24;
    --gray: #6b6b7a;
    --light-gray: #c8c8d0;
    --cream: #f0f0e8;
    --teal: #0d6e6e;
    --red: #e63946;
    --gold: #d4a259;

    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'IBM Plex Mono', monospace;
}

html {
    scroll-behavior: auto;
}

body {
    background: var(--black-deep);
    color: var(--cream);
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 14px;
    line-height: 1.6;
    overflow-x: hidden;
    cursor: crosshair;
}

::selection {
    background: var(--teal);
    color: var(--cream);
}

/* --- Grid Overlay --- */
.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.08;
}

/* --- Degree Ticker (top-right, massive) --- */
.degree-ticker {
    position: fixed;
    top: 20px;
    right: 30px;
    z-index: 100;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(3rem, 8vw, 10rem);
    letter-spacing: -0.04em;
    line-height: 0.85;
    color: var(--cream);
    text-transform: uppercase;
    mix-blend-mode: difference;
    transition: opacity 0.1s;
}

.degree-symbol {
    font-size: 0.5em;
    color: var(--teal);
    vertical-align: super;
}

/* --- Hemisphere Indicator --- */
.hemisphere {
    position: fixed;
    top: 20px;
    right: 30px;
    z-index: 99;
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.2rem;
    color: var(--gray);
    letter-spacing: 0.2em;
    margin-top: clamp(3.5rem, 9vw, 11rem);
}

/* --- Longitude Label --- */
.lng-label {
    position: fixed;
    bottom: 30px;
    left: 30px;
    z-index: 100;
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    color: var(--gray);
    text-transform: uppercase;
    transition: color 0.3s;
}

/* --- Progress Track (left edge) --- */
.progress-track {
    position: fixed;
    left: 0;
    top: 0;
    width: 3px;
    height: 100vh;
    background: var(--dark-surface);
    z-index: 100;
}

.progress-bar {
    width: 100%;
    height: 0%;
    background: linear-gradient(180deg, var(--teal), var(--red));
    transition: height 0.05s linear;
}

/* --- Nav Ticks (right edge) --- */
.nav-ticks {
    position: fixed;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-tick {
    width: 12px;
    height: 2px;
    background: var(--gray);
    opacity: 0.3;
    transition: opacity 0.3s, width 0.3s, background 0.3s;
    cursor: pointer;
}

.nav-tick.active {
    opacity: 1;
    width: 24px;
    background: var(--teal);
}

/* --- Scroll Container --- */
.scroll-container {
    position: relative;
    z-index: 10;
}

/* --- Meridian Section --- */
.meridian-section {
    min-height: 100vh;
    padding: 80px 40px 80px 20px;
    display: grid;
    grid-template-columns: repeat(24, 1fr);
    grid-template-rows: auto;
    gap: 4px;
    position: relative;
    border-bottom: 1px solid var(--dark-surface);
}

.meridian-section::before {
    content: attr(data-degree) '°';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(10rem, 25vw, 30rem);
    color: var(--dark);
    letter-spacing: -0.05em;
    pointer-events: none;
    z-index: -1;
    line-height: 0.8;
}

/* --- Section Modules (Mondrian-like) --- */
.section-module {
    padding: 20px;
    position: relative;
}

.mod-a {
    grid-column: 2 / 16;
    grid-row: 1;
    align-self: end;
    padding-top: 60px;
}

.mod-b {
    grid-column: 3 / 19;
    grid-row: 2;
    padding-top: 30px;
    border-left: 2px solid var(--teal);
    padding-left: 20px;
}

.mod-c {
    grid-column: 17 / 24;
    grid-row: 3;
    text-align: right;
}

.mod-d {
    grid-column: 1 / 10;
    grid-row: 3;
    border-top: 1px solid var(--dark-surface);
    padding-top: 20px;
    margin-top: 20px;
}

.mod-e {
    grid-column: 8 / 24;
    grid-row: 1;
    text-align: right;
    align-self: end;
    padding-top: 60px;
}

.mod-f {
    grid-column: 6 / 22;
    grid-row: 2;
    padding-top: 30px;
    border-right: 2px solid var(--red);
    padding-right: 20px;
    text-align: right;
}

.mod-g {
    grid-column: 1 / 8;
    grid-row: 3;
}

/* --- Typography --- */
.display-heading {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(3rem, 8vw, 10rem);
    letter-spacing: -0.04em;
    line-height: 0.85;
    text-transform: uppercase;
    color: var(--cream);
}

.halfway-mark {
    color: var(--gold);
}

.body-text {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: clamp(0.8rem, 1.2vw, 1rem);
    line-height: 1.7;
    color: var(--light-gray);
    max-width: 55ch;
}

.mod-f .body-text {
    margin-left: auto;
}

.coord-stamp {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--gray);
}

/* --- Time Block --- */
.time-block {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.utc-label {
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--teal);
    text-transform: uppercase;
}

.time-val {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.6rem;
    letter-spacing: 0.05em;
    color: var(--cream);
    font-variant-numeric: tabular-nums;
}

/* --- Data Fragment --- */
.data-fragment {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.frag-label {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    color: var(--gray);
    text-transform: uppercase;
}

.frag-value {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.8rem;
    color: var(--gold);
    letter-spacing: -0.02em;
}

/* --- Glitch Text Effect --- */
.glitch-text {
    position: relative;
}

.glitch-text::before,
.glitch-text::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.glitch-text::before {
    color: var(--red);
    clip-path: inset(0 0 60% 0);
    transform: translate(-3px, -2px);
    opacity: 0.7;
}

.glitch-text::after {
    color: var(--teal);
    clip-path: inset(40% 0 0 0);
    transform: translate(3px, 2px);
    opacity: 0.7;
}

/* --- Finale Section --- */
.section-finale {
    min-height: 120vh;
    border-bottom: none;
}

.section-finale::before {
    color: var(--red);
    opacity: 0.15;
}

.finale-text {
    grid-column: 4 / 21;
    grid-row: 4;
    padding-top: 40px;
    text-align: center;
}

.finale-text .body-text {
    max-width: none;
    font-size: clamp(0.9rem, 1.5vw, 1.2rem);
    color: var(--cream);
}

.finale-text strong {
    color: var(--teal);
    font-weight: 700;
}

/* --- Animations --- */
@keyframes flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.85; }
    75% { opacity: 0.95; }
}

.degree-ticker {
    animation: flicker 4s infinite;
}

/* --- Section enter animation --- */
.meridian-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.meridian-section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .meridian-section {
        grid-template-columns: repeat(12, 1fr);
        padding: 60px 20px;
    }

    .mod-a, .mod-b, .mod-c, .mod-d,
    .mod-e, .mod-f, .mod-g {
        grid-column: 1 / -1;
        text-align: left;
        border-left: none;
        border-right: none;
        padding-left: 0;
        padding-right: 0;
    }

    .mod-a, .mod-e { grid-row: auto; }
    .mod-b, .mod-f { grid-row: auto; border-left: 2px solid var(--teal); padding-left: 15px; }
    .mod-c, .mod-g { grid-row: auto; text-align: left; }
    .mod-d { grid-row: auto; }

    .degree-ticker {
        font-size: clamp(2rem, 15vw, 5rem);
    }

    .hemisphere {
        margin-top: clamp(2.5rem, 16vw, 6rem);
    }

    .finale-text {
        grid-column: 1 / -1;
    }
}