/* completengine.net - Retro-Futuristic Industrial Engine Assembly */

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root {
    --engine-charcoal: #1A1D23;
    --blueprint-slate: #232830;
    --completion-green: #00D68F;
    --ignition-amber: #F5A623;
    --assembly-white: #E8ECF1;
    --gasket-gray: #8B929E;
    --bearing-steel: #3A3F4A;
    --resolution-cyan: #00C9FF;
    --scroll-progress: 0;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'DM Sans', sans-serif;
    font-weight: 400;
    font-size: clamp(0.95rem, 1.1vw, 1.15rem);
    line-height: 1.7;
    letter-spacing: 0.01em;
    color: var(--assembly-white);
    background: var(--engine-charcoal);
    overflow-x: hidden;
}

/* Progress bar */
.progress-bar {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 4px;
    background: var(--bearing-steel);
    z-index: 200;
    transition: height 0.2s;
}

.progress-bar:hover { height: 6px; }

.progress-fill {
    height: 100%;
    background: var(--completion-green);
    width: calc(var(--scroll-progress) * 100%);
    transition: width 0.1s linear;
    box-shadow: 0 0 8px rgba(0, 214, 143, 0.4);
}

/* Sections base */
.section {
    min-height: 100svh;
    position: relative;
    padding: 4rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.section:nth-child(even) { background: var(--blueprint-slate); }
.section:nth-child(odd) { background: var(--engine-charcoal); }

/* Dot grid */
.dot-grid {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: radial-gradient(circle, var(--gasket-gray) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.12;
    pointer-events: none;
}

/* Hero */
.section-blueprint {
    align-items: center;
    text-align: center;
}

.hero-wordmark {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(3rem, 8vw, 9rem);
    font-weight: 300;
    letter-spacing: 0.06em;
    color: var(--assembly-white);
    position: relative;
    z-index: 2;
    opacity: 0;
    animation: wordmarkReveal 2s ease-out 0.3s forwards;
}

@keyframes wordmarkReveal {
    from { opacity: 0; letter-spacing: 0.12em; }
    to { opacity: 1; letter-spacing: 0.06em; }
}

.net-suffix {
    color: var(--completion-green);
    font-weight: 700;
}

.hero-tagline {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gasket-gray);
    letter-spacing: 0.08em;
    margin-top: 1.5rem;
    opacity: 0;
    animation: fadeIn 0.8s ease 2.2s forwards;
    z-index: 2;
}

@keyframes fadeIn { to { opacity: 1; } }

/* Gear divider */
.gear-divider {
    height: 24px;
    overflow: hidden;
    background: var(--engine-charcoal);
    position: relative;
}

.gear-teeth {
    width: 200%;
    height: 100%;
    background: repeating-linear-gradient(
        90deg,
        transparent 0px,
        transparent 8px,
        var(--bearing-steel) 8px,
        var(--bearing-steel) 12px,
        transparent 12px,
        transparent 20px
    );
    opacity: 0.5;
    animation: gearShift 4s linear infinite;
}

@keyframes gearShift {
    from { transform: translateX(0); }
    to { transform: translateX(-20px); }
}

/* Split sections */
.section-split {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
    padding: 4rem;
}

.section-split.reverse {
    flex-direction: row-reverse;
}

.split-left, .split-right {
    flex: 1;
}

.split-left { max-width: 55%; }
.split-right { max-width: 45%; }

.section-split h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.5rem, 3vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.05;
    color: var(--assembly-white);
    margin-bottom: 1rem;
}

.kinetic-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2rem, 5vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--ignition-amber);
    margin-bottom: 1.5rem;
}

.kt-word {
    display: inline-block;
    opacity: 0;
    transform: translateY(-40px);
    transition: opacity 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.kt-word.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Code tags */
.code-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--completion-green);
    text-shadow: 0 0 8px rgba(0, 214, 143, 0.3);
    padding: 0.1em 0.3em;
    background: rgba(0, 214, 143, 0.08);
    border-radius: 3px;
}

/* Engine diagrams */
.engine-diagram, .full-engine {
    width: 100%;
    max-width: 400px;
    display: block;
    margin: 0 auto;
}

.full-engine {
    max-width: 600px;
    margin-top: 2rem;
}

.svg-draw {
    stroke-dasharray: 300;
    stroke-dashoffset: 300;
    transition: stroke-dashoffset 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.section.revealed .svg-draw {
    stroke-dashoffset: 0;
}

/* Counter badges */
.counter-badge {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--ignition-amber);
    text-shadow: 0 0 8px rgba(245, 166, 35, 0.3);
    z-index: 5;
}

.final-badge {
    color: var(--completion-green);
    text-shadow: 0 0 12px rgba(0, 214, 143, 0.5);
    font-size: 1.5rem;
}

/* Full sections */
.section-full {
    align-items: center;
    text-align: center;
}

.big-counter {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(8rem, 20vw, 24rem);
    font-weight: 700;
    color: var(--ignition-amber);
    line-height: 1;
    animation: counterPulse 3s ease-in-out infinite;
    position: relative;
    z-index: 2;
}

@keyframes counterPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.momentum-text {
    max-width: 600px;
    margin-top: 2rem;
    position: relative;
    z-index: 2;
}

.momentum-text p {
    margin-bottom: 1rem;
    color: var(--gasket-gray);
}

.assembly-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2rem, 4vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--completion-green);
    margin-bottom: 2rem;
}

/* Ignition section */
.section-ignition {
    align-items: center;
    text-align: center;
    background: var(--engine-charcoal);
}

.final-wordmark {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2rem, 6vw, 7rem);
    font-weight: 700;
    color: var(--completion-green);
    letter-spacing: -0.02em;
}

.net-green { color: var(--resolution-cyan); }

.final-statement {
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    font-size: clamp(1.1rem, 1.5vw, 1.3rem);
    color: var(--assembly-white);
    margin-top: 2rem;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,*::before,*::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .hero-wordmark, .hero-tagline { opacity: 1; }
    .kt-word { opacity: 1; transform: none; }
    .svg-draw { stroke-dashoffset: 0; }
}

@media (max-width: 768px) {
    .section-split, .section-split.reverse {
        flex-direction: column;
    }
    .split-left, .split-right {
        max-width: 100%;
    }
    .section { padding: 3rem 2rem; }
}