/* ============================================
   completengine.com - Styles
   Five-Act Engine Assembly Narrative
   ============================================ */

/* CSS Custom Properties */
:root {
    --bg-void: #0A0A0F;
    --bg-engine: #141420;
    --bg-shell: #1C1C2E;
    --text-primary: #E8E6F0;
    --text-secondary: #8A879E;
    --neon-magenta: #FF2D7B;
    --neon-cyan: #00F0FF;
    --neon-amber: #FFB800;
    --neon-green: #39FF85;
    --glow-magenta: rgba(255, 45, 123, 0.5);
}

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

html {
    background-color: var(--bg-void);
    scroll-behavior: smooth;
}

body {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 400;
    font-size: 1.05rem;
    line-height: 1.72;
    letter-spacing: 0.01em;
    color: var(--text-primary);
    background-color: var(--bg-void);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3 {
    font-family: 'Roboto Slab', serif;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    line-height: 0.95;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 8vw, 7rem);
}

h2 {
    font-size: clamp(2rem, 6vw, 5rem);
}

h3 {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 700;
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1.2rem;
}

p:last-child {
    margin-bottom: 0;
}

em, strong {
    font-weight: 500;
}

/* Accent / Label text */
.readout-label {
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: 0.8rem;
    line-height: 1.5;
    letter-spacing: 0.06em;
    color: var(--neon-cyan);
    display: block;
    margin-bottom: 0.5rem;
}

/* ============================================
   Act Base Styles
   ============================================ */
.act {
    min-height: 100vh;
    min-height: 100dvh;
    overflow: hidden;
    position: relative;
    width: 100%;
}

/* ============================================
   ACT I: Cold Start
   ============================================ */
.act-i {
    background-color: var(--bg-void);
    display: flex;
    align-items: center;
    justify-content: center;
}

.act-i-content {
    text-align: center;
    width: 100%;
    padding: 0 24px;
}

.hero-text {
    color: var(--text-primary);
    margin-bottom: 2rem;
    visibility: hidden;
}

.hero-text.revealed {
    visibility: visible;
}

.hero-text .char {
    visibility: hidden;
    display: inline-block;
}

.hero-text .char.visible {
    visibility: visible;
}

.hero-text .char.space {
    width: 0.3em;
}

.heartbeat-line {
    width: 100%;
    height: 2px;
    background-color: var(--neon-magenta);
    box-shadow: 0 0 10px var(--neon-magenta), 0 0 30px var(--glow-magenta);
    opacity: 0;
    transition: opacity 400ms ease;
    animation: heartbeat-pulse 1.25s ease-in-out infinite paused;
}

.heartbeat-line.active {
    opacity: 1;
    animation-play-state: running;
}

@keyframes heartbeat-pulse {
    0%, 100% {
        opacity: 0.6;
        box-shadow: 0 0 10px var(--neon-magenta), 0 0 20px var(--glow-magenta);
    }
    50% {
        opacity: 1;
        box-shadow: 0 0 15px var(--neon-magenta), 0 0 40px var(--glow-magenta);
    }
}

.act-i-subtitle {
    font-family: 'Space Mono', monospace;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-top: 2rem;
    opacity: 0;
    transition: opacity 600ms ease 200ms;
}

.act-i-subtitle.visible {
    opacity: 1;
}

/* ============================================
   ACT II: Diagnostics
   ============================================ */
.act-ii {
    background-color: var(--bg-engine);
}

.act-ii-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 3fr;
    min-height: 100vh;
    min-height: 100dvh;
}

.diagnostics-readouts {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 4rem 2rem 4rem 3rem;
    gap: 2rem;
}

.readout {
    border-left: 3px solid var(--neon-cyan);
    padding-left: 1.5rem;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
                transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: var(--stagger-delay, 0ms);
}

.readout.in-view {
    opacity: 1;
    transform: translateY(0);
}

.readout-title {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.readout-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.65;
}

/* Chevron Divider */
.chevron-divider {
    background: repeating-linear-gradient(
        45deg,
        var(--neon-green) 0,
        var(--neon-green) 2px,
        transparent 2px,
        transparent 12px
    );
    opacity: 0.25;
}

/* Diagnostics Visual */
.diagnostics-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
}

.engine-photo-container {
    position: relative;
    width: 100%;
    height: 80%;
    min-height: 500px;
    overflow: hidden;
}

.engine-photo-placeholder {
    width: 100%;
    height: 100%;
    position: relative;
}

.circuit-svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(0.85) contrast(1.3) brightness(0.7);
}

.engine-photo-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 45, 123, 0.15), rgba(0, 240, 255, 0.1));
    mix-blend-mode: color;
    pointer-events: none;
}

.scan-lines {
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.08) 2px,
        rgba(0, 0, 0, 0.08) 4px
    );
    opacity: 0.4;
    pointer-events: none;
}

/* ============================================
   ACT III: Assembly
   ============================================ */
.act-iii {
    background-color: var(--bg-void);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
}

.assembly-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    width: 100%;
}

.assembly-block {
    background-color: var(--bg-engine);
    border: 2px solid var(--bg-shell);
    padding: 2rem;
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
                transform 600ms cubic-bezier(0.16, 1, 0.3, 1),
                border-color 300ms ease,
                box-shadow 300ms ease;
    transition-delay: var(--stagger-delay, 0ms);
    background-image: radial-gradient(circle, var(--text-secondary) 0.5px, transparent 0.5px);
    background-size: 8px 8px;
}

.assembly-block.in-view {
    opacity: 1;
    transform: translateY(0);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 12px var(--neon-cyan), 0 0 4px rgba(0, 240, 255, 0.2);
}

.assembly-block h3 {
    color: var(--neon-cyan);
    font-size: 1.1rem;
}

.assembly-block p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.65;
}

.block-wide {
    grid-column: span 2;
}

/* Corner Brackets */
.corner-bracket-tl::before,
.corner-bracket-tl::after,
.corner-bracket-br::before,
.corner-bracket-br::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    pointer-events: none;
}

.corner-bracket-tl::before {
    top: -4px;
    left: -4px;
    border-top: 2px solid var(--neon-cyan);
    border-left: 2px solid var(--neon-cyan);
}

.corner-bracket-br::after {
    bottom: -4px;
    right: -4px;
    border-bottom: 2px solid var(--neon-cyan);
    border-right: 2px solid var(--neon-cyan);
}

/* Shake Error Animation */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    50% { transform: translateX(4px); }
    75% { transform: translateX(-2px); }
}

.shake-once {
    animation: shake 300ms ease-in-out;
}

.assembly-block.shake-once {
    border-color: var(--neon-amber);
    box-shadow: 0 0 12px var(--neon-amber), 0 0 4px rgba(255, 184, 0, 0.3);
}

/* ============================================
   ACT IV: Ignition
   ============================================ */
.act-iv {
    background-color: var(--bg-void);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.ignition-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.ignition-svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ignition-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 24px;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
                transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: var(--stagger-delay, 0ms);
}

.ignition-content.in-view {
    opacity: 1;
    transform: translateY(0);
}

.ignition-text {
    font-size: clamp(4rem, 12vw, 10rem);
    color: var(--neon-magenta);
}

.glow-pulse {
    animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% {
        text-shadow:
            0 0 10px var(--neon-magenta),
            0 0 40px var(--glow-magenta),
            0 0 80px rgba(255, 45, 123, 0.25);
    }
    50% {
        text-shadow:
            0 0 20px var(--neon-magenta),
            0 0 60px var(--glow-magenta),
            0 0 120px rgba(255, 45, 123, 0.35);
    }
}

.ignition-sub {
    font-family: 'Space Mono', monospace;
    font-size: 1.1rem;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-top: 2rem;
}

/* ============================================
   ACT V: Running
   ============================================ */
.act-v {
    background-color: var(--bg-void);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 24px;
}

.running-content {
    max-width: 680px;
    width: 100%;
    text-align: center;
}

.running-text {
    text-align: left;
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
                transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: var(--stagger-delay, 0ms);
}

.running-text.in-view {
    opacity: 1;
    transform: translateY(0);
}

.running-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.running-text p:first-child {
    color: var(--text-primary);
}

.contact-link {
    margin-bottom: 4rem;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
                transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: var(--stagger-delay, 0ms);
}

.contact-link.in-view {
    opacity: 1;
    transform: translateY(0);
}

.neon-link {
    font-family: 'Space Mono', monospace;
    font-size: 1.2rem;
    letter-spacing: 0.04em;
    color: var(--neon-cyan);
    text-decoration: none;
    position: relative;
    padding-bottom: 4px;
    background-image: linear-gradient(var(--neon-cyan), var(--neon-cyan));
    background-size: 0% 2px;
    background-position: 0 100%;
    background-repeat: no-repeat;
    transition: background-size 400ms ease, color 300ms ease;
}

.neon-link:hover {
    background-size: 100% 2px;
}

.neon-link.shake-once {
    color: var(--neon-amber);
    background-image: linear-gradient(var(--neon-amber), var(--neon-amber));
}

/* Footer Chevrons */
.footer-chevrons {
    width: 100%;
    height: 200px;
    background: repeating-linear-gradient(
        45deg,
        var(--neon-green) 0,
        var(--neon-green) 2px,
        transparent 2px,
        transparent 12px
    );
    opacity: 0.15;
    mask-image: linear-gradient(to bottom, rgba(0,0,0,0.3), transparent);
    -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.3), transparent);
}

/* ============================================
   Stagger Items (generic)
   ============================================ */
.stagger-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
                transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: var(--stagger-delay, 0ms);
}

.stagger-item.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
    .act-ii-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }

    .chevron-divider {
        height: 40px;
    }

    .diagnostics-readouts {
        padding: 3rem 1.5rem;
    }

    .diagnostics-visual {
        padding: 1.5rem;
    }

    .engine-photo-container {
        min-height: 300px;
    }

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

    .block-wide {
        grid-column: span 1;
    }

    .ignition-text {
        font-size: clamp(2.5rem, 10vw, 6rem);
    }
}

@media (max-width: 600px) {
    .diagnostics-readouts {
        padding: 2rem 1rem;
    }

    .act-iii {
        padding: 2rem 1rem;
    }

    .running-content {
        padding: 0;
    }

    h1 {
        font-size: clamp(2rem, 10vw, 4rem);
    }
}