/* completengine.com - Mechanical Completion Industrial Design */

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

:root {
    --engine-black: #0C0E12;
    --graphite-smoke: #1A1D24;
    --blueprint-slate: #2A3040;
    --patina-silver: #A8B2BC;
    --bright-alloy: #E8ECF0;
    --copper: #C87941;
    --verdigris: #3D8B7A;
    --completion-gold: #D4A843;
    --forge-red: #B84233;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Work Sans', sans-serif;
    font-weight: 400;
    font-size: clamp(0.95rem, 1.1vw, 1.15rem);
    line-height: 1.72;
    letter-spacing: 0.01em;
    color: var(--patina-silver);
    background: var(--engine-black);
    overflow-x: hidden;
}

/* Grain overlay */
.grain-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 9000;
    opacity: 0.03;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.65' numOctaves='4' type='fractalNoise'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Completion spine */
.completion-spine {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 100;
}

.spine-node {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--blueprint-slate);
    background: var(--engine-black);
    transition: background 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), border-color 0.5s ease;
}

.spine-node.filled {
    background: var(--copper);
    border-color: var(--copper);
}

.spine-node.gold {
    background: var(--completion-gold);
    border-color: var(--completion-gold);
    box-shadow: 0 0 12px rgba(212, 168, 67, 0.4);
}

.spine-line {
    width: 2px;
    height: 24px;
    background: var(--blueprint-slate);
    transition: background 0.5s ease;
}

.spine-line.filled {
    background: var(--copper);
}

/* Hero Assembly */
.hero-assembly {
    height: 100svh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.assembly-grid {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background:
        repeating-linear-gradient(0deg, rgba(42,48,64,0.08) 0px, transparent 1px, transparent 120px),
        repeating-linear-gradient(90deg, rgba(42,48,64,0.08) 0px, transparent 1px, transparent 120px);
    pointer-events: none;
}

.wordmark {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(3.5rem, 10vw, 11rem);
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--bright-alloy);
    position: relative;
    z-index: 2;
}

.wm-letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(40px) rotate(8deg);
    animation: assembleIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    animation-delay: calc(var(--d) * 150ms);
}

@keyframes assembleIn {
    to {
        opacity: 1;
        transform: translateY(0) rotate(0deg);
    }
}

.wm-suffix {
    font-size: 0.4em;
    color: var(--copper);
    opacity: 0;
    animation: suffixSlide 0.5s cubic-bezier(0.22, 1, 0.36, 1) 2.2s forwards;
}

@keyframes suffixSlide {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

.hero-sub {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--copper);
    margin-top: 1.5rem;
    opacity: 0;
    animation: fadeIn 0.6s ease 2.8s forwards;
    z-index: 2;
}

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

/* Conveyor belts */
.conveyor {
    height: 80px;
    overflow: hidden;
    background: linear-gradient(to right, transparent, rgba(200,121,65,0.06) 50%, transparent);
    transform: skewY(-3deg);
    margin: 0;
}

.conveyor-track {
    display: flex;
    gap: 60px;
    padding: 20px 0;
    transform: skewY(3deg);
    animation: conveyorMove 30s linear infinite;
    width: max-content;
}

.conveyor-icon {
    width: 24px;
    height: 24px;
    opacity: 0.3;
    flex-shrink: 0;
}

@keyframes conveyorMove {
    from { transform: skewY(3deg) translateX(0); }
    to { transform: skewY(3deg) translateX(-504px); }
}

/* Content sections */
.content-section {
    display: flex;
    align-items: center;
    gap: 3rem;
    padding: 6rem 4rem;
    min-height: 80vh;
    border-bottom: 1px solid rgba(42, 48, 64, 0.3);
}

.section-ring {
    flex-shrink: 0;
    width: 72px;
    height: 72px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.completion-ring {
    width: 72px;
    height: 72px;
    transform: rotate(-90deg);
}

.ring-fill {
    transition: stroke-dashoffset 1.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.ring-value {
    position: absolute;
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: var(--copper);
}

.ring-gold {
    color: var(--completion-gold);
}

.section-body {
    max-width: 640px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.6s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.section-body.revealed {
    opacity: 1;
    transform: translateY(0);
}

.section-body h2 {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(1.8rem, 4vw, 3.5rem);
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--bright-alloy);
    margin-bottom: 1rem;
}

.section-body p {
    margin-bottom: 1.5rem;
}

/* Terminal readout */
.terminal-readout {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--copper);
    background: var(--engine-black);
    padding: 0.8rem 1.2rem;
    border-left: 2px solid var(--copper);
    background:
        repeating-linear-gradient(0deg, transparent 0px, transparent 1px, rgba(0,0,0,0.1) 1px, rgba(0,0,0,0.1) 2px),
        var(--engine-black);
}

.terminal-cursor {
    animation: cursorBlink 0.8s step-end infinite;
}

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

.section-final {
    border-bottom: none;
}

.contact-line {
    font-family: 'Share Tech Mono', monospace;
    letter-spacing: 0.15em;
    color: var(--completion-gold);
    margin-top: 2rem;
}

/* Hover mechanical engagement */
a, button, .section-body h2 {
    transition: transform 0.2s ease, color 0.3s ease;
}

a:hover, button:hover {
    color: var(--verdigris);
    transform: translateY(-1px);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,*::before,*::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .wm-letter { opacity: 1; transform: none; }
    .wm-suffix { opacity: 1; }
    .hero-sub { opacity: 1; }
    .section-body { opacity: 1; transform: none; }
}

@media (max-width: 768px) {
    .content-section {
        flex-direction: column;
        padding: 4rem 2rem;
        gap: 2rem;
    }
    .completion-spine { right: 8px; }
}