/* ==========================================================================
   SimVec: The Invisible Engine - Technical Case Study
   ========================================================================== */

:root {
    --color-charcoal: #121212;
    --color-bone: #F5F5F5;
    --color-gold: #D4AF37;
    --color-gold-dim: rgba(212, 175, 55, 0.2);
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition: all 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

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

body {
    background-color: var(--color-charcoal);
    color: var(--color-bone);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3 {
    font-family: var(--font-heading);
    color: var(--color-gold);
}

h1 { font-size: 5rem; line-height: 1.1; margin-bottom: 2rem; }
h2 { font-size: 3rem; margin-bottom: 1.5rem; }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }

.mono { font-family: var(--font-mono); font-size: 0.9rem; color: var(--color-gold); }

/* Navigation */
nav {
    padding: 2rem 0;
    border-bottom: 1px solid rgba(245, 245, 245, 0.1);
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-gold);
    text-decoration: none;
    letter-spacing: 2px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 4rem 0;
    position: relative;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 5.5rem;
    margin-bottom: 1.5rem;
}

.bauhaus-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
    border-top: 1px solid var(--color-gold-dim);
    padding-top: 2rem;
}

.grid-item h4 {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-gold);
    margin-bottom: 0.5rem;
}

.grid-item p {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-mockup {
    position: relative;
}

.hero-mockup img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 50px rgba(0,0,0,0.5));
    transition: transform 0.5s ease;
}

.hero-mockup:hover img {
    transform: scale(1.02) rotate(-1deg);
}

/* Neural-Flow Pipeline */
.pipeline-section {
    padding: 10rem 0;
    position: relative;
}

.pipeline-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-left: 100px;
}

.pipeline-line {
    position: absolute;
    left: 49px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(212, 175, 55, 0.1);
    z-index: -1;
}

.pipeline-progress {
    position: absolute;
    left: 49px;
    top: 0;
    width: 2px;
    height: 0%;
    background: var(--color-gold);
    transition: height 1s ease-out;
}

.pipeline-step {
    display: flex;
    align-items: flex-start;
    margin-bottom: 8rem;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.pipeline-step.visible {
    opacity: 1;
    transform: translateY(0);
}

.step-marker {
    width: 100px;
    height: 100px;
    background: var(--color-charcoal);
    border: 1px solid var(--color-gold);
    display: flex;
    justify-content: center;
    align-items: center;
    margin-left: -50px;
    margin-right: 50px;
    z-index: 2;
    position: relative;
}

.step-marker i {
    font-size: 1.5rem;
    color: var(--color-gold);
}

.step-content {
    flex: 1;
}

.step-content h2 {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
}

.step-content h3 {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
}

/* Specific Step Visuals */
.vector-visual {
    margin-top: 2rem;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 10px;
}

.vector-dot {
    width: 8px;
    height: 8px;
    background: var(--color-gold-dim);
    border-radius: 50%;
}

.vector-dot.active {
    background: var(--color-gold);
    box-shadow: 0 0 10px var(--color-gold);
}

.vault-visual {
    margin-top: 2rem;
    height: 150px;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--color-gold-dim);
    position: relative;
    overflow: hidden;
}

.vault-dot {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--color-gold);
    border-radius: 50%;
    opacity: 0.3;
}

.vault-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border: 1px solid var(--color-gold);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 3s infinite;
}

@keyframes pulse {
    0% { width: 0; height: 0; opacity: 1; }
    100% { width: 300px; height: 300px; opacity: 0; }
}

/* Deep-Dive Cards */
.deep-dive-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    padding: 8rem 0;
}

.dive-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(245, 245, 245, 0.05);
    padding: 3rem;
    transition: var(--transition);
}

.dive-card:hover {
    border-color: var(--color-gold);
    background: rgba(255,255,255,0.03);
    transform: translateY(-10px);
}

.dive-card .card-icon {
    font-size: 2.5rem;
    color: var(--color-gold);
    margin-bottom: 2rem;
}

.dive-card p {
    font-size: 1.1rem;
    color: #ccc;
}

/* No-Expo Section */
.engineering-statement {
    padding: 10rem 0;
    text-align: center;
    border-top: 1px solid rgba(245, 245, 245, 0.1);
}

.statement-box {
    max-width: 900px;
    margin: 0 auto;
}

.statement-box h2 {
    font-size: 1.2rem;
    font-family: var(--font-mono);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 3rem;
}

.statement-box p {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    color: var(--color-bone);
    line-height: 1.2;
}

/* Footer */
footer {
    padding: 4rem 0;
    border-top: 1px solid rgba(245, 245, 245, 0.1);
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 2px;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-content { grid-template-columns: 1fr; }
    h1 { font-size: 4rem; }
    .hero-text h1 { font-size: 4.5rem; }
}

@media (max-width: 768px) {
    .pipeline-container { padding-left: 20px; }
    .pipeline-line, .pipeline-progress { left: 19px; }
    .step-marker { margin-left: -30px; width: 60px; height: 60px; margin-right: 30px; }
    .deep-dive-grid { grid-template-columns: 1fr; }
    .statement-box p { font-size: 2.2rem; }
}

/* ==========================================================================
   Neural Engine Deep-Dive (Synchronized with Main Portfolio)
   ========================================================================== */

.deepdive-section {
    background-color: var(--color-bone); /* Light Bauhaus Background */
    color: var(--color-charcoal);
    padding: 15rem 0;
    overflow: hidden;
}

.deepdive-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 5rem;
}

.deepdive-header h2 {
    color: var(--color-charcoal);
}

.toggle-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
    z-index: 5;
    position: relative;
}

.toggle-label {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-charcoal);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.theme-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
}

.theme-switch input { opacity: 0; width: 0; height: 0; }

.theme-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: transparent;
    border: 1px solid var(--color-gold);
    transition: .4s;
    border-radius: 30px;
}

.theme-slider:before {
    position: absolute;
    content: "";
    height: 22px; width: 22px;
    left: 3px; bottom: 3px;
    background-color: var(--color-gold);
    transition: .4s;
    border-radius: 50%;
}

input:checked + .theme-slider {
    background-color: #fff;
    border-color: var(--color-charcoal);
}

input:checked + .theme-slider:before {
    transform: translateX(30px);
    background-color: var(--color-charcoal);
}

.glass-architecture {
    position: relative;
    padding: 6rem 4rem;
    border: 1px solid rgba(212, 175, 55, 0.3);
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.glass-architecture.dev-mode {
    background: #fff;
    border-color: var(--color-gold);
    box-shadow: 0 0 30px rgba(212, 175, 55, 0.1);
}

.dev-text { display: none; }
.dev-mode .marketing-text { display: none; }
.dev-mode .dev-text { display: block; color: var(--color-charcoal); }

.flow-grid {
    display: grid;
    grid-template-columns: 1fr 80px 1fr 80px 1fr;
    grid-template-rows: 250px 120px 250px;
    align-items: center;
}

.arch-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
    height: 100%;
    justify-content: center;
}

.phone-frame {
    width: 80px; height: 160px;
    border: 2px solid var(--color-charcoal);
    border-radius: 10px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--color-bone);
}

.action-trigger {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: var(--color-gold);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.4);
    animation: pulseGold 2s infinite;
}

.glass-box {
    width: 100px; height: 100px;
    border: 1px solid var(--color-charcoal);
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
    color: var(--color-charcoal);
    position: relative;
    transition: var(--transition);
    overflow: hidden;
}

.dev-mode .glass-box {
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.vector-cloud { background: #111; }

.cloud-point {
    position: absolute;
    width: 4px; height: 4px;
    background: rgba(212, 175, 55, 0.4);
    border-radius: 50%;
}

.cloud-point:nth-child(1) { top: 20%; left: 30%; }
.cloud-point:nth-child(2) { top: 60%; left: 70%; }
.cloud-point:nth-child(3) { top: 80%; left: 40%; }

.cloud-point.target {
    top: 50%; left: 50%;
    background: #fff;
    box-shadow: 0 0 10px #fff;
}

.query-ray {
    position: absolute;
    top: 0; left: 0;
    width: 50%; height: 50%;
    border-right: 1px dashed var(--color-gold);
    border-bottom: 1px dashed var(--color-gold);
    opacity: 0;
}

.micro-copy {
    position: absolute;
    font-family: var(--font-body);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: var(--color-charcoal);
    color: var(--color-gold);
    padding: 0.5rem 1rem;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 10;
    border: 1px solid var(--color-gold);
    pointer-events: none;
}

.arch-node:hover .micro-copy { opacity: 1; transform: translateY(0); }
.micro-copy.top-right { top: -20px; right: -80%; }
.micro-copy.bottom-left { bottom: -20px; left: -100%; }

.node-content { margin-top: 1.5rem; }
.node-content h4 { margin-bottom: 0.3rem; }
.node-content p { font-size: 0.8rem; line-height: 1.4; color: #666; }
.dev-mode .node-content p { color: var(--color-charcoal); }

.flow-gap { position: relative; background: rgba(18, 18, 18, 0.1); }
.dev-mode .flow-gap { background: rgba(212, 175, 55, 0.3); }

.h-gap { width: 100%; height: 1px; }
.v-gap { width: 1px; height: 100%; justify-self: center; }

.golden-pulse {
    position: absolute;
    width: 6px; height: 6px;
    background: var(--color-gold);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-gold);
    opacity: 0;
}

.h-gap .golden-pulse { top: -2.5px; left: 0; }
.v-gap .golden-pulse { left: -2.5px; top: 0; }
.gap-4 .golden-pulse { left: auto; right: 0; }

@keyframes flowH {
    0% { left: 0; opacity: 1; }
    20% { left: 100%; opacity: 1; }
    21% { opacity: 0; }
    100% { opacity: 0; left: 100%; }
}
@keyframes flowHReverse {
    0% { right: 0; opacity: 1; }
    20% { right: 100%; opacity: 1; }
    21% { opacity: 0; }
    100% { opacity: 0; right: 100%; }
}
@keyframes flowV {
    0% { top: 0; opacity: 1; }
    20% { top: 100%; opacity: 1; }
    21% { opacity: 0; }
    100% { opacity: 0; top: 100%; }
}

.animate-flow .gap-1 .golden-pulse { animation: flowH 5s infinite; }
.animate-flow .gap-2 .golden-pulse { animation: flowH 5s infinite 1s; }
.animate-flow .gap-3 .golden-pulse { animation: flowV 5s infinite 2s; }
.animate-flow .gap-4 .golden-pulse { animation: flowHReverse 5s infinite 3s; }

.animate-flow .query-ray { animation: searchRay 5s infinite 3s; }
.animate-flow .cloud-point.target { animation: pulseTarget 5s infinite 3s; }

@keyframes searchRay {
    0% { opacity: 0; width: 0; height: 0; }
    10% { opacity: 1; width: 50%; height: 50%; }
    20% { opacity: 0; width: 50%; height: 50%; }
    100% { opacity: 0; }
}
@keyframes pulseTarget {
    0% { transform: scale(1); }
    10% { transform: scale(2); }
    20% { transform: scale(1); }
    100% { transform: scale(1); }
}
@keyframes pulseGold {
    0% { box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(212, 175, 55, 0); }
    100% { box-shadow: 0 0 0 0 rgba(212, 175, 55, 0); }
}

@media (max-width: 900px) {
    .flow-grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(9, auto);
    }
    .node-entry { grid-area: 1 / 1 / 2 / 2; }
    .gap-1 { grid-area: 2 / 1 / 3 / 2; width: 1px; height: 40px; justify-self: center; }
    .node-gatekeeper { grid-area: 3 / 1 / 4 / 2; }
    .gap-2 { grid-area: 4 / 1 / 5 / 2; width: 1px; height: 40px; justify-self: center; }
    .node-brain { grid-area: 5 / 1 / 6 / 2; }
    .gap-3 { grid-area: 6 / 1 / 7 / 2; width: 1px; height: 40px; justify-self: center; }
    .node-core { grid-area: 7 / 1 / 8 / 2; }
    .gap-4 { grid-area: 8 / 1 / 9 / 2; width: 1px; height: 40px; justify-self: center; }
    .node-result { grid-area: 9 / 1 / 10 / 2; }

    .flow-gap .golden-pulse { left: -2.5px !important; right: auto !important; top: 0; }
    .animate-flow .gap-4 .golden-pulse { animation: flowV 5s infinite 3s !important; }
}