/* ============================================================
   monopole.quest // styles.css
   Retro-futuristic adventure timeline with central spine,
   diagonal era transitions, and fixed mini-map navigator.
   ============================================================ */

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

:root {
    --c-bg-deep: #0f1729;
    --c-bg-panel: #1a2744;
    --c-accent-gold: #f59e0b;
    --c-text: #e0d8c8;
    --c-link-blue: #3b82f6;
    --c-era-brown: #4a2d0a;
    --c-spine: #374151;

    --c-bg-deep-glow: rgba(15, 23, 41, 0.85);
    --c-gold-glow: rgba(245, 158, 11, 0.4);
    --c-gold-soft: rgba(245, 158, 11, 0.18);
    --c-text-dim: rgba(224, 216, 200, 0.65);
    --c-text-fade: rgba(224, 216, 200, 0.4);
    --c-blue-soft: rgba(59, 130, 246, 0.2);

    --f-display: "Teko", "Inter", system-ui, sans-serif;
    --f-body: "Barlow", "Inter", system-ui, sans-serif;
    --f-mono: "Red Hat Mono", "Space Mono", ui-monospace, monospace;

    --spine-x: 50%;
    --milestone-max: 460px;
    --milestone-gap: 70px;
}

html {
    scroll-behavior: smooth;
    background: var(--c-bg-deep);
}

body {
    font-family: var(--f-body);
    color: var(--c-text);
    background:
        radial-gradient(ellipse at 20% 0%, rgba(59, 130, 246, 0.08), transparent 60%),
        radial-gradient(ellipse at 80% 100%, rgba(245, 158, 11, 0.06), transparent 55%),
        var(--c-bg-deep);
    font-size: 0.95rem;
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* ---------- Background scanlines / vignette ---------- */
.scanlines {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    background-image: repeating-linear-gradient(
        to bottom,
        rgba(224, 216, 200, 0.025) 0,
        rgba(224, 216, 200, 0.025) 1px,
        transparent 1px,
        transparent 3px
    );
    mix-blend-mode: overlay;
    opacity: 0.6;
}

.vignette {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 2;
    background: radial-gradient(ellipse at center, transparent 50%, rgba(15, 23, 41, 0.7) 100%);
}

/* ---------- Mini-map ---------- */
.mini-map {
    position: fixed;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 50;
    background: rgba(26, 39, 68, 0.65);
    border: 1px solid rgba(245, 158, 11, 0.25);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 14px 12px;
    width: 130px;
    font-family: var(--f-mono);
    font-size: 0.65rem;
    color: var(--c-text);
    user-select: none;
}

.mini-map-label {
    color: var(--c-accent-gold);
    letter-spacing: 0.15em;
    font-weight: 600;
    font-size: 0.6rem;
    margin-bottom: 12px;
    text-align: center;
    border-bottom: 1px dashed rgba(245, 158, 11, 0.3);
    padding-bottom: 8px;
}

.mini-map-track {
    position: relative;
    height: 220px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    margin: 4px 0 12px;
}

.mini-map-line {
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 50%;
    width: 1px;
    background: linear-gradient(to bottom, var(--c-spine) 0%, var(--c-spine) 100%);
    transform: translateX(-0.5px);
}

.mini-map-dot {
    position: relative;
    z-index: 2;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1px solid var(--c-spine);
    background: var(--c-bg-deep);
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
}

.mini-map-dot:hover {
    border-color: var(--c-accent-gold);
    transform: scale(1.4);
}

.mini-map-dot.active {
    border-color: var(--c-accent-gold);
    background: var(--c-accent-gold);
    box-shadow: 0 0 8px var(--c-gold-glow);
}

.mini-map-dot.passed {
    border-color: var(--c-accent-gold);
    background: rgba(245, 158, 11, 0.4);
}

.mini-map-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px dashed rgba(245, 158, 11, 0.3);
    padding-top: 8px;
    font-size: 0.55rem;
}

.mini-map-progress-label {
    color: var(--c-text-dim);
    letter-spacing: 0.1em;
}

.mini-map-progress-value {
    color: var(--c-accent-gold);
    font-weight: 600;
    letter-spacing: 0.05em;
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    z-index: 3;
    min-height: 100vh;
    padding: 100px 6vw 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero::before {
    /* faint detector grid */
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    pointer-events: none;
}

.hero-frame {
    position: relative;
    max-width: 980px;
    width: 100%;
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: 60px 50px 70px;
    background:
        linear-gradient(135deg, rgba(26, 39, 68, 0.55), rgba(15, 23, 41, 0.85));
}

.hero-frame::before,
.hero-frame::after {
    content: "";
    position: absolute;
    width: 18px;
    height: 18px;
    border: 2px solid var(--c-accent-gold);
}
.hero-frame::before {
    top: -2px;
    left: -2px;
    border-right: none;
    border-bottom: none;
}
.hero-frame::after {
    bottom: -2px;
    right: -2px;
    border-left: none;
    border-top: none;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    color: var(--c-text-dim);
    margin-bottom: 32px;
    text-transform: uppercase;
}

.meta-tag {
    border-left: 2px solid var(--c-accent-gold);
    padding-left: 8px;
}

.hero-title {
    font-family: var(--f-display);
    font-weight: 600;
    line-height: 0.95;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    margin-bottom: 28px;
    color: var(--c-text);
}

.hero-line-1 {
    display: block;
    font-size: clamp(1.4rem, 3.2vw, 2.4rem);
    color: var(--c-accent-gold);
    letter-spacing: 0.18em;
    font-weight: 500;
    margin-bottom: 6px;
}

.hero-line-2 {
    display: block;
    font-size: clamp(2.6rem, 7.5vw, 5.4rem);
    background: linear-gradient(180deg, var(--c-text) 0%, var(--c-text) 50%, rgba(245, 158, 11, 0.85) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 40px rgba(245, 158, 11, 0.15);
}

.hero-subtitle {
    font-family: var(--f-body);
    font-size: clamp(1rem, 1.4vw, 1.1rem);
    line-height: 1.6;
    color: var(--c-text-dim);
    max-width: 640px;
    margin-bottom: 40px;
    font-weight: 300;
}

.hero-readout {
    display: grid;
    grid-template-columns: repeat(2, minmax(220px, 1fr));
    gap: 8px 36px;
    border-top: 1px dashed rgba(224, 216, 200, 0.2);
    border-bottom: 1px dashed rgba(224, 216, 200, 0.2);
    padding: 20px 0;
    margin-bottom: 40px;
    font-family: var(--f-mono);
    font-size: 0.78rem;
}

.readout-row {
    display: flex;
    gap: 16px;
    align-items: baseline;
}

.readout-key {
    color: var(--c-link-blue);
    letter-spacing: 0.1em;
    font-weight: 500;
    min-width: 90px;
    flex-shrink: 0;
}

.readout-val {
    color: var(--c-text);
    letter-spacing: 0.05em;
}

.hero-start {
    display: flex;
    align-items: center;
    gap: 16px;
    font-family: var(--f-mono);
    font-size: 0.85rem;
    letter-spacing: 0.18em;
    color: var(--c-accent-gold);
    text-transform: uppercase;
    font-weight: 500;
}

.start-marker {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--c-accent-gold);
    box-shadow: 0 0 16px var(--c-gold-glow);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 12px var(--c-gold-glow); }
    50% { transform: scale(1.25); box-shadow: 0 0 22px rgba(245, 158, 11, 0.7); }
}

/* ---------- Timeline ---------- */
.timeline {
    position: relative;
    z-index: 3;
    max-width: 1240px;
    margin: 0 auto;
    padding: 60px 4vw 120px;
}

.spine {
    position: absolute;
    top: 0;
    bottom: 0;
    left: var(--spine-x);
    transform: translateX(-1px);
    width: 2px;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        var(--c-spine) 4%,
        var(--c-spine) 96%,
        transparent 100%
    );
    z-index: 0;
}

.spine::before {
    /* moving glow on spine */
    content: "";
    position: absolute;
    left: -4px;
    width: 10px;
    height: 60px;
    background: radial-gradient(ellipse at center, var(--c-gold-glow) 0%, transparent 70%);
    top: 0;
    pointer-events: none;
    transform: translateY(0);
    transition: transform 0.1s linear;
}

/* ---------- Era Sections ---------- */
.era {
    position: relative;
    padding: 90px 0 60px;
    margin-bottom: 30px;
}

.era + .era {
    margin-top: 20px;
}

/* Diagonal clip-path transitions between major eras */
.era-search,
.era-modern,
.era-future {
    background: linear-gradient(180deg, rgba(26, 39, 68, 0.0) 0%, rgba(26, 39, 68, 0.35) 50%, rgba(26, 39, 68, 0.0) 100%);
    clip-path: polygon(0 5%, 100% 0%, 100% 95%, 0 100%);
    -webkit-clip-path: polygon(0 5%, 100% 0%, 100% 95%, 0 100%);
}

.era-modern {
    clip-path: polygon(0 0, 100% 5%, 100% 100%, 0 95%);
    -webkit-clip-path: polygon(0 0, 100% 5%, 100% 100%, 0 95%);
}

.era-future {
    clip-path: polygon(0 5%, 100% 0%, 100% 100%, 0 100%);
    -webkit-clip-path: polygon(0 5%, 100% 0%, 100% 100%, 0 100%);
    background: linear-gradient(180deg, rgba(74, 45, 10, 0.25) 0%, rgba(15, 23, 41, 0.0) 100%);
}

.era-header {
    text-align: center;
    margin: 0 auto 80px;
    max-width: 720px;
    position: relative;
    z-index: 2;
    padding: 0 20px;
}

.era-tag {
    display: inline-block;
    font-family: var(--f-mono);
    font-size: 0.78rem;
    letter-spacing: 0.3em;
    color: var(--c-link-blue);
    border: 1px solid rgba(59, 130, 246, 0.4);
    padding: 4px 14px;
    margin-bottom: 18px;
    text-transform: uppercase;
}

.era-title {
    font-family: var(--f-display);
    font-weight: 600;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--c-accent-gold);
    margin-bottom: 16px;
    text-shadow: 0 0 30px rgba(245, 158, 11, 0.2);
}

.era-summary {
    font-family: var(--f-body);
    font-weight: 300;
    color: var(--c-text-dim);
    font-size: 1rem;
    line-height: 1.7;
    max-width: 580px;
    margin: 0 auto;
}

/* ---------- Milestones ---------- */
.milestone {
    position: relative;
    width: calc(50% - 40px);
    margin-bottom: var(--milestone-gap);
    z-index: 2;
}

.milestone.left {
    margin-right: auto;
    padding-right: 40px;
    text-align: right;
}

.milestone.right {
    margin-left: auto;
    padding-left: 40px;
    text-align: left;
}

.milestone-marker {
    position: absolute;
    top: 36px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--c-accent-gold);
    background: var(--c-bg-deep);
    z-index: 3;
    transition: all 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.milestone.left .milestone-marker {
    right: -47px;
}

.milestone.right .milestone-marker {
    left: -47px;
}

.milestone-marker::before {
    content: "";
    position: absolute;
    top: 50%;
    width: 26px;
    height: 1px;
    background: var(--c-spine);
    transition: background 0.5s ease;
}

.milestone.left .milestone-marker::before {
    right: 14px;
    transform: translateY(-50%);
}

.milestone.right .milestone-marker::before {
    left: 14px;
    transform: translateY(-50%);
}

.milestone.activated .milestone-marker {
    background: var(--c-accent-gold);
    box-shadow: 0 0 12px rgba(245, 158, 11, 0.4), 0 0 24px rgba(245, 158, 11, 0.25);
    transform: scale(1.15);
}

.milestone.activated .milestone-marker::before {
    background: var(--c-accent-gold);
}

/* Milestone card */
.milestone-card {
    position: relative;
    background:
        linear-gradient(135deg, rgba(26, 39, 68, 0.85) 0%, rgba(15, 23, 41, 0.92) 100%);
    border: 1px solid rgba(224, 216, 200, 0.12);
    padding: 24px 28px 26px;
    max-width: var(--milestone-max);
    margin: 0;
    transition: all 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
    transform: translateY(20px);
    opacity: 0;
}

.milestone.left .milestone-card {
    margin-left: auto;
}

.milestone.activated .milestone-card {
    transform: translateY(0);
    opacity: 1;
    border-color: rgba(245, 158, 11, 0.3);
}

.milestone-card::before {
    /* gold corner tick */
    content: "";
    position: absolute;
    top: -1px;
    width: 24px;
    height: 1px;
    background: var(--c-accent-gold);
    transition: width 0.6s ease;
}
.milestone.left .milestone-card::before { right: -1px; }
.milestone.right .milestone-card::before { left: -1px; }

.milestone-card.highlight {
    border-color: rgba(245, 158, 11, 0.45);
    background:
        linear-gradient(135deg, rgba(74, 45, 10, 0.35) 0%, rgba(26, 39, 68, 0.9) 60%, rgba(15, 23, 41, 0.92) 100%);
}

.milestone.activated .milestone-card.highlight {
    box-shadow: 0 0 0 1px rgba(245, 158, 11, 0.4), 0 0 30px rgba(245, 158, 11, 0.12);
}

.milestone-date {
    font-family: var(--f-mono);
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    color: var(--c-link-blue);
    margin-bottom: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.milestone-card.highlight .milestone-date {
    color: var(--c-accent-gold);
}

.milestone-title {
    font-family: var(--f-display);
    font-weight: 600;
    font-size: clamp(1.6rem, 2.6vw, 2.2rem);
    line-height: 1.05;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    color: var(--c-text);
    margin-bottom: 14px;
}

.milestone-body {
    font-family: var(--f-body);
    font-weight: 400;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--c-text);
    margin-bottom: 18px;
}

.milestone-body em {
    color: var(--c-accent-gold);
    font-style: italic;
}

.milestone-equation {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: rgba(15, 23, 41, 0.7);
    border-left: 2px solid var(--c-link-blue);
    padding: 10px 14px;
    margin-bottom: 18px;
    font-family: var(--f-mono);
}

.milestone.left .milestone-equation {
    border-left: none;
    border-right: 2px solid var(--c-link-blue);
    text-align: right;
}

.eq-text {
    font-size: 0.95rem;
    color: var(--c-accent-gold);
    letter-spacing: 0.05em;
    font-weight: 500;
}

.eq-caption {
    font-size: 0.7rem;
    color: var(--c-text-dim);
    letter-spacing: 0.05em;
}

.milestone-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.milestone.left .milestone-tags {
    justify-content: flex-end;
}

.tag {
    font-family: var(--f-mono);
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    color: var(--c-text-dim);
    border: 1px solid rgba(224, 216, 200, 0.2);
    padding: 3px 8px;
    text-transform: uppercase;
    background: rgba(15, 23, 41, 0.5);
}

.tag.tag-gold {
    color: var(--c-accent-gold);
    border-color: rgba(245, 158, 11, 0.5);
    background: rgba(245, 158, 11, 0.08);
}

/* ---------- End Node ---------- */
.end-node .end-marker {
    background: var(--c-accent-gold);
    box-shadow: 0 0 18px var(--c-gold-glow);
    width: 18px;
    height: 18px;
    top: 30px;
}

.milestone.right.end-node .milestone-marker {
    left: -49px;
}

.end-card {
    border-color: rgba(245, 158, 11, 0.5);
    background:
        linear-gradient(135deg, rgba(74, 45, 10, 0.4) 0%, rgba(26, 39, 68, 0.92) 100%);
}

.end-stamp {
    margin-top: 18px;
    font-family: var(--f-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--c-accent-gold);
    border-top: 1px dashed rgba(245, 158, 11, 0.4);
    padding-top: 12px;
    text-transform: uppercase;
}

/* ---------- Footer ---------- */
.site-footer {
    position: relative;
    z-index: 3;
    padding: 60px 6vw 80px;
    border-top: 1px dashed rgba(224, 216, 200, 0.15);
    background: rgba(15, 23, 41, 0.6);
}

.footer-frame {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    font-family: var(--f-mono);
    font-size: 0.78rem;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.footer-key {
    color: var(--c-link-blue);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-size: 0.7rem;
}

.footer-val {
    color: var(--c-text);
    letter-spacing: 0.04em;
    line-height: 1.6;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    :root {
        --spine-x: 32px;
    }

    .mini-map {
        display: none;
    }

    .hero {
        padding: 80px 5vw 100px;
    }

    .hero-frame {
        padding: 40px 26px 50px;
    }

    .hero-readout {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .timeline {
        padding: 40px 20px 80px 20px;
    }

    .milestone,
    .milestone.left,
    .milestone.right {
        width: 100%;
        margin-left: 60px;
        margin-right: 0;
        padding-left: 0;
        padding-right: 0;
        text-align: left;
        max-width: calc(100% - 60px);
    }

    .milestone.left .milestone-marker,
    .milestone.right .milestone-marker {
        left: -34px;
        right: auto;
    }

    .milestone.left .milestone-marker::before,
    .milestone.right .milestone-marker::before {
        left: 14px;
        right: auto;
    }

    .milestone.left .milestone-card,
    .milestone.right .milestone-card {
        margin: 0;
    }

    .milestone.left .milestone-equation {
        border-left: 2px solid var(--c-link-blue);
        border-right: none;
        text-align: left;
    }

    .milestone.left .milestone-tags {
        justify-content: flex-start;
    }

    .milestone.left .milestone-card::before,
    .milestone.right .milestone-card::before {
        left: -1px;
        right: auto;
    }

    .footer-frame {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}

@media (max-width: 520px) {
    body { font-size: 0.92rem; }
    .hero-frame { padding: 30px 20px 40px; }
    .hero-meta { gap: 10px; font-size: 0.66rem; }
    .milestone-card { padding: 20px 20px 22px; }
}