/*
   LPFM Radio Hub — MASTER CINEMATIC EDITION
   Theme: "Split Dance" (Digital Decay)
   
   Source: 24-frame cinematic sampling of "Split Dance" MV
   
   Key Aesthetic Markers:
   - Deep indigo/purple backgrounds (concert stage, dark room)
   - Cyan/teal character highlights (Miku-teal hair, monitor glow)
   - Crimson/red accents (second character, contrast pops)
   - Monitor-in-room framing (content feels like it's on a screen)
   - Japanese typography overlays, bold & blocky
   - Transition from clean split-screen → dark decay → moody separation
*/

/* ===== DESIGN TOKENS ===== */
:root {
    /* Primary palette — extracted from frames */
    --dd-indigo: #1a0a2e;
    --dd-deep-purple: #2d1b4e;
    --dd-cyan: #00d4aa;
    --dd-cyan-bright: #4de8c8;
    --dd-crimson: #e63946;
    --dd-crimson-glow: rgba(230, 57, 70, 0.4);
    --dd-white: #f0eef6;
    --dd-white-muted: rgba(240, 238, 246, 0.7);
    --dd-monitor-gray: #3a3a4a;
    --dd-surface: rgba(45, 27, 78, 0.6);

    /* Typography */
    --font-heading: 'Black Ops One', 'Impact', sans-serif;
    --font-body: 'Space Mono', 'Courier New', monospace;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;

    /* Override tokens.css variables so base CSS uses dark theme */
    --color-primary: #00d4aa;
    --color-secondary: #2d1b4e;
    --color-accent: #e63946;
    --color-background: #1a0a2e;
    --color-text: #f0eef6;
    --color-text-muted: rgba(240, 238, 246, 0.7);
    --color-surface: rgba(45, 27, 78, 0.6);
    --color-border: rgba(0, 212, 170, 0.15);
}


/* ===== BASE ===== */
body {
    background: var(--dd-indigo);
    color: var(--dd-white);
    font-family: var(--font-body);
    margin: 0;
    overflow-x: hidden;
    line-height: 1.7;
    font-size: 15px;
}

/* CRT Scanline Overlay — the "monitor-in-room" feel */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background:
        repeating-linear-gradient(0deg,
            transparent,
            transparent 2px,
            rgba(0, 0, 0, 0.08) 2px,
            rgba(0, 0, 0, 0.08) 4px);
    pointer-events: none;
    z-index: 9999;
}

/* Subtle screen flicker */
@keyframes flicker {

    0%,
    97%,
    100% {
        opacity: 1;
    }

    98% {
        opacity: 0.97;
    }

    99% {
        opacity: 0.99;
    }
}

body {
    animation: flicker 4s infinite;
}

/* ===== LINKS ===== */
a {
    color: var(--dd-cyan);
    text-decoration: none;
    transition: color 0.2s, text-shadow 0.2s;
}

a:hover {
    color: var(--dd-cyan-bright);
    text-shadow: 0 0 12px var(--dd-cyan);
}

/* ===== HEADINGS ===== */
h1,
h2,
h3 {
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

h1 {
    font-size: clamp(1.8rem, 4vw, 3rem);
    color: var(--dd-cyan);
    text-shadow: 2px 2px 0 var(--dd-crimson), 0 0 30px rgba(0, 212, 170, 0.3);
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

h2 {
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    color: var(--dd-crimson);
    border-left: 4px solid var(--dd-cyan);
    padding-left: var(--space-sm);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

h3 {
    font-size: 1.1rem;
    color: var(--dd-cyan-bright);
    margin-top: var(--space-md);
}

/* ===== HEADER ===== */
.site-header {
    background: linear-gradient(180deg, rgba(26, 10, 46, 0.95), rgba(45, 27, 78, 0.85));
    border-bottom: 2px solid var(--dd-cyan);
    padding: var(--space-sm) var(--space-md);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1100px;
    margin: 0 auto;
}

.site-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--dd-cyan) !important;
    text-shadow: 1px 1px 0 var(--dd-crimson);
    text-decoration: none !important;
}

.nav__list {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav__item {
    color: var(--dd-white-muted) !important;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.4rem 0.8rem;
    border-radius: 2px;
    transition: all 0.2s;
}

.nav__item:hover {
    color: var(--dd-cyan) !important;
    background: rgba(0, 212, 170, 0.1);
    text-shadow: 0 0 8px var(--dd-cyan);
}

.btn--header {
    background: var(--dd-crimson) !important;
    color: var(--dd-white) !important;
    border: none;
    padding: 0.5rem 1.2rem;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn--header:hover {
    background: var(--dd-cyan) !important;
    color: var(--dd-indigo) !important;
    box-shadow: 0 0 20px var(--dd-cyan);
}

/* ===== MAIN CONTENT ===== */
main,
.site-article {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-md);
}

.article-header {
    padding: var(--space-lg) 0 var(--space-md);
    border-bottom: 1px solid var(--dd-deep-purple);
    margin-bottom: var(--space-md);
}

.article-intro,
p {
    color: var(--dd-white-muted);
    line-height: 1.8;
    margin-bottom: var(--space-sm);
}

/* Force .site-body dark (layout.css sets it to --color-background) */
.site-body {
    background-color: var(--dd-indigo) !important;
    color: var(--dd-white) !important;
}

/* Force .article-intro readable (site-type.css sets it to --color-text-muted) */
.article-intro {
    color: var(--dd-white) !important;
    opacity: 0.9;
}

/* Force article body text readable */
.article-substance p,
.article-substance li,
.site-article p,
.site-article li,
.content p,
.content li {
    color: var(--dd-white-muted) !important;
}

.article-substance strong,
.site-article strong,
.content strong {
    color: var(--dd-cyan-bright) !important;
}

/* Force cards dark (components.css hardcodes background: white) */
.card,
.calculator-widget {
    background: var(--dd-surface) !important;
    border-color: rgba(0, 212, 170, 0.15) !important;
}

/* Force expert-note dark (components.css uses rgba(0,0,0,0.02)) */
.expert-note {
    background: linear-gradient(135deg, rgba(230, 57, 70, 0.1), rgba(45, 27, 78, 0.8)) !important;
    border-left: 4px solid var(--dd-crimson) !important;
    border-color: var(--dd-crimson) !important;
}

/* Force footer dark (layout.css hardcodes background: #f1f5f9) */
.premium-footer {
    background: linear-gradient(180deg, var(--dd-deep-purple), var(--dd-indigo)) !important;
}

/* Hero intro paragraph */
.hero .intro,
.hero p {
    color: var(--dd-white) !important;
    opacity: 0.9;
}

/* ===== SECTIONS — "Monitor Panel" Feel ===== */
section[id] {
    background: var(--dd-surface);
    border: 1px solid rgba(0, 212, 170, 0.15);
    border-radius: 4px;
    padding: var(--space-md);
    margin-bottom: var(--space-md);
    position: relative;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Glowing top-edge accent (like a monitor's power LED) */
section[id]::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--dd-cyan), transparent 50%, var(--dd-crimson));
}

/* ===== LISTS ===== */
ul {
    padding-left: 1.2rem;
}

li {
    margin-bottom: 0.6rem;
    color: var(--dd-white-muted);
}

li strong {
    color: var(--dd-cyan-bright);
}

/* ===== CODE ===== */
code {
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.2);
    padding: 0.15em 0.4em;
    border-radius: 3px;
    font-family: var(--font-body);
    font-size: 0.9em;
    color: var(--dd-cyan-bright);
}

/* ===== EXPERT NOTE / ASIDE ===== */
.expert-note {
    background: linear-gradient(135deg, rgba(230, 57, 70, 0.1), rgba(45, 27, 78, 0.8));
    border: 1px solid var(--dd-crimson);
    border-radius: 4px;
    padding: var(--space-md);
    margin: var(--space-md) 0;
}

.expert-note__header {
    font-family: var(--font-heading);
    color: var(--dd-crimson);
    text-transform: uppercase;
    display: block;
    margin-bottom: var(--space-xs);
    font-size: 0.9rem;
    letter-spacing: 2px;
}

.expert-note__content {
    color: var(--dd-white-muted);
    font-style: italic;
    line-height: 1.8;
}

/* ===== SOURCES ===== */
.sources-list {
    border: 1px solid var(--dd-monitor-gray);
    padding: var(--space-md);
    margin: var(--space-md) 0;
    border-radius: 4px;
    background: rgba(58, 58, 74, 0.3);
}

.sources-list ul {
    list-style-type: "▸ ";
}

.sources-list li {
    font-size: 0.85rem;
    color: var(--dd-white-muted);
}

/* ===== TRANSPARENCY NOTE ===== */
.transparency-note {
    border-top: 1px solid var(--dd-monitor-gray);
    padding-top: var(--space-sm);
    margin-top: var(--space-md);
    font-size: 0.85rem;
    color: var(--dd-white-muted);
}

/* ===== FOOTER ===== */
.premium-footer {
    background: linear-gradient(180deg, var(--dd-deep-purple), var(--dd-indigo));
    border-top: 2px solid var(--dd-cyan);
    padding: var(--space-lg) var(--space-md) var(--space-md);
    margin-top: var(--space-lg);
}

.footer__heading {
    font-family: var(--font-heading);
    color: var(--dd-cyan);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 2px;
    display: block;
    margin-bottom: var(--space-xs);
}

.footer__trust-bar {
    border-bottom: 1px solid rgba(0, 212, 170, 0.15);
    padding-bottom: var(--space-md);
    margin-bottom: var(--space-md);
}

.footer__trust-bar p {
    font-size: 0.85rem;
}

.footer__content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.footer__tagline {
    font-size: 0.85rem;
    color: var(--dd-white-muted);
}

.footer__nav-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
}

.footer__list {
    list-style: none;
    padding: 0;
}

.footer__link {
    color: var(--dd-white-muted) !important;
    font-size: 0.8rem;
    display: block;
    padding: 0.2rem 0;
}

.footer__link:hover {
    color: var(--dd-cyan) !important;
}

.footer__legal {
    border-top: 1px solid rgba(0, 212, 170, 0.1);
    padding-top: var(--space-sm);
    text-align: center;
    font-size: 0.75rem;
    color: var(--dd-white-muted);
}

/* ===== GLITCH TEXT EFFECT (for hero) ===== */
@keyframes glitch-shift {

    0%,
    90%,
    100% {
        transform: translate(0);
    }

    92% {
        transform: translate(-2px, 1px);
    }

    94% {
        transform: translate(2px, -1px);
    }

    96% {
        transform: translate(-1px, -1px);
    }
}

.article-header h1 {
    animation: glitch-shift 6s infinite;
}

/* ===== SCROLL BEAT SECTIONS ===== */
.scroll-beat {
    padding: var(--space-md) 0;
}

.utility-block h2 {
    border: none;
    text-align: center;
    padding-left: 0;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .header__inner {
        flex-direction: column;
        gap: 1rem;
    }

    .nav__list {
        gap: 0.8rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .footer__content {
        grid-template-columns: 1fr;
    }

    .footer__nav-grid {
        grid-template-columns: 1fr 1fr;
    }

    main,
    .site-article {
        padding: var(--space-sm);
    }

    section[id] {
        padding: var(--space-sm);
    }
}

/* ===== CINEMATIC SHOWCASE SECTION ===== */
.cinematic-showcase {
    background: var(--dd-surface);
    border: 1px solid rgba(0, 212, 170, 0.15);
    border-radius: 4px;
    padding: var(--space-md);
    margin: var(--space-md) 0;
}

.frame-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
    margin: var(--space-sm) 0;
}

.frame-grid img {
    width: 100%;
    border: 1px solid var(--dd-monitor-gray);
    border-radius: 2px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.frame-grid img:hover {
    border-color: var(--dd-cyan);
    box-shadow: 0 0 15px rgba(0, 212, 170, 0.3);
}

/* ===== "SPLIT" DIVIDER — the core motif ===== */
.split-divider {
    display: grid;
    grid-template-columns: 1fr 1fr;
    height: 80px;
    margin: var(--space-md) 0;
    border: 1px solid var(--dd-monitor-gray);
    overflow: hidden;
}

.split-divider .left {
    background: linear-gradient(135deg, var(--dd-cyan), rgba(0, 212, 170, 0.3));
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    color: var(--dd-indigo);
    font-size: 0.9rem;
    letter-spacing: 3px;
}

.split-divider .right {
    background: linear-gradient(135deg, var(--dd-crimson), rgba(230, 57, 70, 0.3));
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    color: var(--dd-white);
    font-size: 0.9rem;
    letter-spacing: 3px;
}