/* ============================================
   concurrent.quest — styles.css
   Scandinavian-meets-glitch modular narrative
   ============================================ */

/* --- Custom Properties --- */
:root {
    --bg-primary: #faf6ef;
    --bg-alt: #f0e8d8;
    --bg-deep: #d4c4a8;
    --text-primary: #2e2418;
    --text-body: #5c4f3d;
    --text-muted: #8c7a62;
    --border-line: #b8a88a;
    --glitch-red: #e8432a;
    --glitch-cyan: #2ad4e8;
    --aurora-green: #48c9a3;
    --gutter: 24px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-body);
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    line-height: 1.65;
    overflow-x: hidden;
    position: relative;
}

/* --- Aurora Background Layer --- */
.aurora-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.aurora-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
}

.aurora-orb--green {
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(72, 201, 163, 0.04) 0%, transparent 70%);
    top: 10%;
    left: -10%;
    animation: aurora-drift-1 35s ease-in-out infinite alternate;
}

.aurora-orb--cyan {
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(42, 212, 232, 0.03) 0%, transparent 70%);
    top: 40%;
    right: -15%;
    animation: aurora-drift-2 40s ease-in-out infinite alternate;
}

.aurora-orb--red {
    width: 45vw;
    height: 45vw;
    background: radial-gradient(circle, rgba(232, 67, 42, 0.02) 0%, transparent 70%);
    bottom: 20%;
    left: 20%;
    animation: aurora-drift-3 32s ease-in-out infinite alternate;
}

.aurora-orb--green-2 {
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, rgba(72, 201, 163, 0.03) 0%, transparent 70%);
    top: 60%;
    right: 10%;
    animation: aurora-drift-4 38s ease-in-out infinite alternate;
}

@keyframes aurora-drift-1 {
    0% { transform: translate(0, 0); }
    100% { transform: translate(15vw, 10vh); }
}

@keyframes aurora-drift-2 {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-10vw, -15vh); }
}

@keyframes aurora-drift-3 {
    0% { transform: translate(0, 0); }
    100% { transform: translate(10vw, -8vh); }
}

@keyframes aurora-drift-4 {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-12vw, 12vh); }
}

/* --- Navigation Micro-blocks --- */
.nav-blocks {
    position: fixed;
    top: 24px;
    right: 24px;
    display: flex;
    gap: 6px;
    z-index: 100;
}

.nav-block {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-line);
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.nav-block:hover {
    border-color: var(--glitch-red);
    background: var(--bg-alt);
}

.nav-glyph {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

/* --- Section Base --- */
.section {
    position: relative;
    z-index: 1;
}

/* ============================================
   Section 1: The Scheduler
   ============================================ */
.section--scheduler {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 80px var(--gutter) 40px;
}

.scheduler-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gutter);
    max-width: 720px;
    width: 100%;
}

.sched-block {
    border: 1px solid var(--border-line);
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 16px;
    opacity: 0;
    transition: opacity 0.5s ease-out;
}

.sched-block.is-visible {
    opacity: 1;
}

.sched-block--alt {
    background: var(--bg-alt);
}

.sched-keyword {
    font-family: 'JetBrains Mono', monospace;
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    letter-spacing: 0.05em;
    color: var(--text-primary);
}

.thread-lines {
    width: 100%;
    max-width: 1200px;
    margin-top: 48px;
}

.thread-lines svg {
    width: 100%;
    height: 60px;
}

.thread-lines--between {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--gutter);
}

.thread-lines--between svg {
    width: 100%;
    height: 40px;
}

.thread-lines--converge {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--gutter);
}

.thread-lines--converge svg {
    width: 100%;
    height: 80px;
}

/* ============================================
   Section 2: The Thread Pool
   ============================================ */
.section--threadpool {
    padding: 120px var(--gutter);
    max-width: 1200px;
    margin: 0 auto;
}

.cluster {
    margin-bottom: 120px;
}

.cluster-heading {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: clamp(2.5rem, 6vw, 5rem);
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: 40px;
}

.cluster-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--gutter);
}

/* --- Block System --- */
.block {
    border: 1px solid var(--border-line);
    background: var(--bg-primary);
    padding: 28px 24px;
    position: relative;
    transition: transform 0.4s ease-out, border-color 0.2s ease-out;
}

.block--alt {
    background: var(--bg-alt);
}

.block--deep {
    background: var(--bg-deep);
}

.block--span3 { grid-column: span 3; }
.block--span4 { grid-column: span 4; }
.block--span5 { grid-column: span 5; }
.block--span6 { grid-column: span 6; }
.block--span7 { grid-column: span 7; }
.block--span8 { grid-column: span 8; }
.block--span12 { grid-column: span 12; }

.block-heading {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.block-body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.65;
    color: var(--text-body);
    max-width: 38ch;
}

.block-mono {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.block-caption {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-muted);
    margin-top: 12px;
}

.block-symbol {
    margin-bottom: 16px;
}

/* --- Reveal Animation --- */
.reveal-block {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal-block.is-revealed {
    opacity: 1;
    transform: translateY(0);
}

/* --- Thread Motif --- */
.thread-motif {
    margin-bottom: 8px;
}

.thread-motif svg {
    width: 100%;
    height: 40px;
}

.thread-motif--wide svg {
    height: 50px;
}

/* --- Collision Sentinel --- */
.collision-sentinel {
    height: 1px;
    width: 100%;
    pointer-events: none;
}

/* ============================================
   Glitch Effects
   ============================================ */
.glitch-active .block {
    transition: transform 0.1s ease-out, border-color 0.1s ease-out;
}

.glitch-shift {
    animation: glitch-displace 0.4s ease-out forwards;
}

@keyframes glitch-displace {
    0% { transform: translateX(0); }
    20% { transform: translateX(6px); }
    40% { transform: translateX(-4px); }
    60% { transform: translateX(3px); }
    80% { transform: translateX(-1px); }
    100% { transform: translateX(0); }
}

.glitch-border {
    animation: glitch-border-flash 0.4s ease-out;
}

@keyframes glitch-border-flash {
    0%, 100% { border-color: var(--border-line); }
    25% { border-color: var(--glitch-red); }
    50% { border-color: var(--border-line); }
    75% { border-color: var(--glitch-red); }
}

.glitch-chromatic {
    animation: glitch-aberration 0.3s ease-out;
}

@keyframes glitch-aberration {
    0%, 100% { text-shadow: none; }
    30% { text-shadow: 2px 0 var(--glitch-red), -2px 0 var(--glitch-cyan); }
    60% { text-shadow: -1px 0 var(--glitch-red), 1px 0 var(--glitch-cyan); }
}

/* Scan lines overlay on cluster during glitch */
.glitch-scanlines::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 3px,
        rgba(232, 67, 42, 0.06) 3px,
        rgba(232, 67, 42, 0.06) 4px
    );
    z-index: 10;
    animation: scanlines-fade 0.5s ease-out forwards;
}

@keyframes scanlines-fade {
    0% { opacity: 1; }
    100% { opacity: 0; }
}

/* ============================================
   Section 3: The Resolution
   ============================================ */
.section--resolution {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 80px var(--gutter);
}

.resolution-aurora {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 70vw;
    height: 70vw;
    max-width: 800px;
    max-height: 800px;
    transform: translate(-50%, -50%);
    background: radial-gradient(
        circle,
        rgba(72, 201, 163, 0.15) 0%,
        rgba(42, 212, 232, 0.08) 30%,
        rgba(232, 67, 42, 0.03) 60%,
        transparent 80%
    );
    border-radius: 50%;
    filter: blur(60px);
    pointer-events: none;
    z-index: 0;
}

.resolution-content {
    max-width: 720px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.resolution-text {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-weight: 400;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.resolution-converge {
    margin-top: 60px;
    position: relative;
    z-index: 1;
}

.resolution-converge svg {
    width: 120px;
    height: 80px;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
    .scheduler-grid {
        grid-template-columns: repeat(3, 1fr);
        max-width: 540px;
    }

    .block--span3,
    .block--span4,
    .block--span5,
    .block--span6,
    .block--span7,
    .block--span8 {
        grid-column: span 6;
    }

    .block--span12 {
        grid-column: span 12;
    }

    .cluster-heading {
        font-size: clamp(2rem, 5vw, 3.5rem);
    }
}

@media (max-width: 600px) {
    .scheduler-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 360px;
    }

    .cluster-grid {
        grid-template-columns: repeat(1, 1fr);
    }

    .block--span3,
    .block--span4,
    .block--span5,
    .block--span6,
    .block--span7,
    .block--span8,
    .block--span12 {
        grid-column: span 1;
    }

    .nav-blocks {
        top: 12px;
        right: 12px;
    }

    .nav-block {
        width: 34px;
        height: 34px;
    }

    .section--threadpool {
        padding: 80px 16px;
    }

    .cluster {
        margin-bottom: 80px;
    }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .sched-block {
        opacity: 1;
        transition: none;
    }

    .reveal-block {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .aurora-orb {
        animation: none;
    }

    .glitch-shift,
    .glitch-border,
    .glitch-chromatic {
        animation: none;
    }

    .glitch-scanlines::before {
        display: none;
    }
}