/* ============================================
   parallel.day — Styles
   Aesthetic: Terminal | Palette: Ethereal Blue
   ============================================ */

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

:root {
    --void-black: #060b14;
    --deep-slate: #0a1628;
    --midnight-layer: #0f1d32;
    --nav-bg: #0a0f1a;
    --fog-gray: #94a3b8;
    --signal-white: #e0f2fe;
    --ice-whisper: #bae6fd;
    --parallel-cyan: #67e8f9;
    --electric-pulse: #22d3ee;
    --deep-teal: #0891b2;
    --system-green: #34d399;
    --alert-amber: #fbbf24;

    --font-primary: 'Nunito Sans', sans-serif;
    --font-mono: 'Inconsolata', monospace;

    --grid-line-color: rgba(103, 232, 249, 0.04);
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    background: var(--void-black);
    color: var(--signal-white);
    font-family: var(--font-primary);
    font-weight: 400;
    font-size: clamp(0.95rem, 1.2vw, 1.15rem);
    line-height: 1.65;
    letter-spacing: 0.005em;
    overflow-x: hidden;
}

/* --- Grid Lines Background (applied to all panels) --- */
.panel {
    position: relative;
    width: 100%;
    min-height: 100vh;
    overflow: hidden;
    background:
        linear-gradient(135deg, var(--void-black) 0%, var(--deep-slate) 100%);
}

.panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--grid-line-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line-color) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: 0;
}

.panel-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
    width: 100%;
    min-height: 100vh;
    padding: 0;
}

/* --- Navigation Bar --- */
#nav-bar {
    position: fixed;
    left: 0;
    top: 0;
    width: 48px;
    height: 100vh;
    background: rgba(10, 15, 26, 0.8); /* #0a0f1a at 80% */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 1000;
    border-right: 1px solid rgba(8, 145, 178, 0.2);
}

.nav-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(148, 163, 184, 0.3);
    cursor: pointer;
    transition: background 0.3s, box-shadow 0.3s;
    position: relative;
}

.nav-dot.active {
    background: var(--parallel-cyan);
    box-shadow: 0 0 12px rgba(103, 232, 249, 0.5);
}

.nav-dot:hover {
    background: var(--electric-pulse);
}

.nav-label {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--fog-gray);
    opacity: 0;
    transition: opacity 0.2s;
    white-space: nowrap;
    pointer-events: none;
}

.nav-dot:hover .nav-label {
    opacity: 0.6;
}

/* --- Blinking Cursor --- */
.cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background: var(--parallel-cyan);
    vertical-align: text-bottom;
    animation: blink 1.06s steps(1) infinite;
    margin-left: 4px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    50.01%, 100% { opacity: 0; }
}

/* --- Panel 0: Boot Sequence --- */
#panel-0 .panel-grid {
    align-content: center;
    padding: 0 48px 0 72px;
}

.boot-log {
    grid-column: 1 / -1;
    margin-bottom: 32px;
}

.boot-line {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: 1rem;
    color: var(--fog-gray);
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    line-height: 2;
}

.boot-line.visible {
    opacity: 1;
    transform: translateX(0);
}

.hero-title {
    grid-column: 1 / -1;
    font-family: var(--font-primary);
    font-weight: 800;
    font-size: clamp(3.5rem, 9vw, 7.5rem);
    letter-spacing: -0.03em;
    color: var(--signal-white);
    margin-bottom: 48px;
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.hero-title.visible {
    opacity: 1;
    transform: translateX(0);
}

.thread-columns {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.thread-columns.visible {
    opacity: 1;
}

.thread-col {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.8;
    height: 200px;
    overflow: hidden;
    border-left: 1px solid rgba(8, 145, 178, 0.3);
    padding-left: 12px;
}

#thread-0 { color: var(--parallel-cyan); }
#thread-1 { color: var(--electric-pulse); }
#thread-2 { color: var(--deep-teal); }
#thread-3 { color: var(--ice-whisper); }

/* --- Panel Labels --- */
.panel-label {
    grid-column: 1 / -1;
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--fog-gray);
    opacity: 0.6;
    padding: 24px 0 0 72px;
}

/* --- Panel 1: Process Table --- */
#panel-1 .panel-grid {
    align-content: start;
    padding: 0 48px 0 72px;
}

.process-grid {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-template-rows: repeat(6, 1fr);
    gap: 8px;
    padding: 16px 0;
    align-self: center;
    min-height: calc(100vh - 80px);
}

.process-cell {
    background: var(--deep-slate);
    border: 1px solid rgba(8, 145, 178, 0.15);
    border-radius: 4px;
    padding: 8px 10px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                border-color 0.3s;
}

.process-cell.visible {
    opacity: 1;
    transform: translateX(0);
}

.process-cell.done {
    border-color: var(--system-green);
}

.process-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--fog-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.process-status {
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.process-status.running {
    color: var(--parallel-cyan);
}

.process-status.done {
    color: var(--system-green);
}

.process-status.pending {
    color: var(--alert-amber);
}

.process-bar-track {
    width: 100%;
    height: 4px;
    background: rgba(103, 232, 249, 0.08);
    border-radius: 2px;
    margin-top: 6px;
    overflow: hidden;
}

.process-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--parallel-cyan);
    border-radius: 2px;
    transition: width 0.15s steps(20);
}

.process-cell.done .process-bar-fill {
    background: var(--system-green);
}

/* --- Panel 2: Data Flow --- */
#panel-2 .panel-grid {
    align-content: start;
}

.data-flow-svg {
    grid-column: 1 / -1;
    width: 100%;
    height: calc(100vh - 60px);
}

.data-flow-svg line {
    stroke: var(--deep-teal);
    stroke-width: 1;
    stroke-dasharray: 6 6;
    animation: dash 1s linear infinite;
}

@keyframes dash {
    to { stroke-dashoffset: -12; }
}

.data-flow-svg circle.node {
    fill: var(--parallel-cyan);
    animation: nodePulse 2s ease-in-out infinite;
}

@keyframes nodePulse {
    0%, 100% { r: 4; }
    50% { r: 5.2; }
}

.data-flow-svg text {
    font-family: var(--font-mono);
    font-size: 9px;
    fill: var(--fog-gray);
}

/* --- Panel 3: Metrics Dashboard --- */
#panel-3 .panel-grid {
    align-content: start;
    padding: 0 48px 0 72px;
}

.metrics-dashboard {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 16px;
    padding: 16px 0;
    min-height: calc(100vh - 80px);
    align-self: center;
}

.metric-module {
    background: var(--deep-slate);
    border: 1px solid rgba(8, 145, 178, 0.15);
    border-radius: 4px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.metric-module.visible {
    opacity: 1;
    transform: translateX(0);
}

.metric-title {
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--fog-gray);
    opacity: 0.6;
    margin-bottom: 12px;
}

.chart-svg {
    width: 100%;
    flex: 1;
}

.chart-svg polyline {
    fill: none;
    stroke: var(--parallel-cyan);
    stroke-width: 1.5;
}

/* Histogram */
.histogram {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    flex: 1;
    padding-top: 8px;
}

.histogram-bar {
    flex: 1;
    background: var(--parallel-cyan);
    border-radius: 2px 2px 0 0;
    min-height: 4px;
    transition: height 0.3s steps(1);
}

/* Progress Ring */
.ring-svg {
    width: 100%;
    max-width: 120px;
    margin: auto;
}

.ring-bg {
    fill: none;
    stroke: rgba(103, 232, 249, 0.08);
    stroke-width: 8;
}

.ring-fill {
    fill: none;
    stroke: var(--parallel-cyan);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 314.16;
    stroke-dashoffset: 314.16;
    transform: rotate(-90deg);
    transform-origin: center;
    transition: stroke-dashoffset 2s ease;
}

.ring-text {
    font-family: var(--font-mono);
    font-size: 18px;
    font-weight: 600;
    fill: var(--parallel-cyan);
}

/* Readouts */
.readout-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 10px 0;
    border-bottom: 1px solid rgba(8, 145, 178, 0.1);
}

.readout-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--fog-gray);
}

.readout-value {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--parallel-cyan);
}

/* Sparklines */
.sparkline-strip {
    display: flex;
    gap: 12px;
    flex: 1;
    align-items: center;
}

.sparkline {
    flex: 1;
    height: 24px;
}

.sparkline polyline {
    fill: none;
    stroke: var(--parallel-cyan);
    stroke-width: 1.5;
}

/* Event Log */
.event-log {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--ice-whisper);
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.event-log .log-entry {
    opacity: 0;
    transform: translateY(8px);
    animation: logAppear 0.3s forwards;
}

@keyframes logAppear {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.log-entry .log-time {
    color: var(--fog-gray);
    margin-right: 8px;
}

/* --- Panel 4: Convergence --- */
#panel-4 .panel-grid {
    align-content: center;
    justify-items: center;
    text-align: center;
    padding: 0 48px 0 72px;
}

.convergence-content {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
    align-content: center;
    justify-items: center;
}

.convergence-center {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

#convergence-lines {
    position: absolute;
    width: 100%;
    height: 200px;
    top: -120px;
    left: 0;
}

#convergence-lines .conv-line {
    position: absolute;
    height: 1px;
    background: var(--deep-teal);
    transform-origin: right center;
    opacity: 0;
    transition: opacity 1s ease, width 1.5s cubic-bezier(0.22, 1, 0.36, 1);
}

#convergence-lines.visible .conv-line {
    opacity: 0.5;
}

.terminal-prompt {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 2vw, 1.6rem);
    color: var(--signal-white);
    padding: 24px 0;
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.terminal-prompt.visible {
    opacity: 1;
    transform: translateX(0);
}

.prompt-symbol {
    color: var(--parallel-cyan);
}

.footer-nav {
    grid-column: 1 / -1;
    display: flex;
    gap: 32px;
    margin-top: 48px;
    opacity: 0;
    transition: opacity 0.8s ease 0.3s;
}

.footer-nav.visible {
    opacity: 1;
}

.footer-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--fog-gray);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-link:hover {
    color: var(--electric-pulse);
}

/* --- Tilt-3D Perspective --- */
#scroll-container {
    perspective: 1200px;
}

.panel {
    transform-style: preserve-3d;
    will-change: transform;
}

/* --- Scroll-driven entry animations (stagger class) --- */
.stagger-in {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.stagger-in.visible {
    opacity: 1;
    transform: translateX(0);
}

/* --- Responsive adjustments --- */
@media (max-width: 1024px) {
    .process-grid {
        grid-template-columns: repeat(4, 1fr);
        grid-template-rows: auto;
    }

    .metrics-dashboard {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }

    .thread-columns {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .metrics-dashboard {
        grid-template-columns: 1fr;
    }

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

    #nav-bar {
        display: none;
    }

    #panel-0 .panel-grid,
    #panel-1 .panel-grid,
    #panel-3 .panel-grid,
    #panel-4 .panel-grid,
    .panel-label {
        padding-left: 16px;
        padding-right: 16px;
    }
}

/* --- Progress bar stepping animation --- */
@keyframes progressStep {
    from { width: 0%; }
    to { width: 100%; }
}