:root {
    --bg-primary: #0A0E27;
    --bg-secondary: #141937;
    --bg-tertiary: #1E2447;
    --accent-primary: #00D9FF;
    --accent-secondary: #A855F7;
    --accent-hover: #00B8D9;
    --text-primary: #FFFFFF;
    --text-secondary: #B8BBCC;
    --text-muted: #6B7280;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(168, 85, 247, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(0, 217, 255, 0.05) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 1;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 2;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1.5rem 0;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--accent-primary);
    gap: 1rem;
}

/* Case Study Hero */
.case-hero {
    padding: 120px 0 80px;
    text-align: center;
}

.case-hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.project-tags {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.tag {
    background: rgba(0, 217, 255, 0.1);
    color: var(--accent-primary);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    border: 1px solid rgba(0, 217, 255, 0.2);
}

.case-hero h1 {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.lead {
    font-size: 1.4rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.project-meta-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.meta-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.meta-item h4 {
    font-size: 0.85rem;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.meta-item p {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
}

/* Case Study Sections */
.case-section {
    padding: 5rem 0;
}

.case-section.bg-alt {
    background: rgba(20, 25, 55, 0.3);
}

.content-grid {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 4rem;
    align-items: start;
}

.sidebar {
    position: sticky;
    top: 120px;
}

.sidebar h3 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

.phase-description {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.main-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.main-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 3rem 0 1.5rem;
    color: var(--text-primary);
}

.main-content h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 1.5rem 0 1rem;
    color: var(--text-primary);
}

.main-content h5 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 1rem 0 0.5rem;
    color: var(--accent-primary);
}

.main-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.main-content ul {
    margin: 1rem 0 1.5rem 1.5rem;
    color: var(--text-secondary);
}

.main-content li {
    margin-bottom: 0.75rem;
    line-height: 1.7;
}

/* Highlight Box */
.highlight-box {
    background: var(--bg-secondary);
    border-left: 4px solid var(--accent-primary);
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
}

.highlight-box h4 {
    color: var(--accent-primary);
    margin-top: 0;
}

.highlight-box ul {
    margin-bottom: 0;
}

/* Impact Metrics */
.impact-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 3rem 0;
}

.metric {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.metric-number {
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 0.5rem;
}

.metric-label {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Research Methods */
.research-methods {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 2rem 0;
}

.method-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.method-card i {
    font-size: 2.5rem;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.method-card h4 {
    margin: 1rem 0 0.5rem;
}

.method-card p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* Insights List */
.insights-list {
    margin: 2rem 0;
}

.insight-item {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.insight-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--bg-primary);
}

.insight-item h4 {
    margin: 0 0 0.5rem;
}

.insight-item p {
    margin: 0;
}

/* Personas */
.personas-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin: 2rem 0;
}

.persona-card {
    background: var(--bg-secondary);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.persona-header {
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(168, 85, 247, 0.1));
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.persona-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--accent-primary);
}

.persona-avatar i {
    font-size: 2.5rem;
    color: var(--accent-primary);
}

.persona-header h4 {
    margin: 0;
    font-size: 1.5rem;
}

.persona-role {
    color: var(--text-muted);
    margin: 0;
}

.persona-details {
    padding: 2rem;
}

.persona-details p {
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.persona-details ul {
    margin: 0.5rem 0 1.5rem 1.5rem;
}

.persona-details li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.persona-quote {
    background: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: 12px;
    border-left: 3px solid var(--accent-primary);
    font-style: italic;
    color: var(--text-secondary);
    margin-top: 1.5rem;
}

/* Problem Statement */
.problem-statement {
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(168, 85, 247, 0.1));
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin: 2rem 0;
}

.problem-statement p {
    font-size: 1.2rem;
    line-height: 1.8;
    margin: 0;
    color: var(--text-primary);
}

/* Journey Map */
.journey-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.journey-stage {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.journey-stage h5 {
    color: var(--accent-primary);
    margin: 0 0 1rem;
    font-size: 1.2rem;
}

.journey-stage p {
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

/* Principles Grid */
.principles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin: 2rem 0;
}

.principle-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.principle-card h4 {
    margin: 0 0 1rem;
    font-size: 1.2rem;
}

.principle-card p {
    margin: 0;
    color: var(--text-secondary);
}

/* Information Architecture */
.ia-structure {
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    margin: 2rem 0;
}

.ia-level {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.ia-node {
    background: var(--bg-tertiary);
    padding: 1rem 2rem;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    font-weight: 600;
}

.ia-node.primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
    border-color: transparent;
}

.ia-subnode {
    background: var(--bg-primary);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* User Flow */
.user-flow {
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    margin: 2rem 0;
}

.flow-step {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.flow-node {
    background: var(--bg-tertiary);
    padding: 1.5rem 2rem;
    border-radius: 16px;
    border: 2px solid var(--border-color);
    min-width: 300px;
    text-align: center;
    transition: var(--transition);
}

.flow-node:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.flow-node.success {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.flow-number {
    display: inline-block;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
    font-weight: 800;
    line-height: 35px;
    margin-bottom: 0.5rem;
}

.flow-node p {
    margin: 0;
    color: var(--text-primary);
    font-weight: 600;
}

.flow-node small {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.flow-arrow {
    color: var(--accent-primary);
    font-size: 1.5rem;
    margin: 1rem 0;
}

/* Wireframes */
.wireframe-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 2rem 0;
}

.wireframe-item {
    text-align: center;
}

.wireframe-placeholder {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 4rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    margin-bottom: 1rem;
}

.wireframe-placeholder i {
    font-size: 3rem;
    color: var(--accent-primary);
    opacity: 0.3;
    margin-bottom: 1rem;
}

.wireframe-placeholder p {
    color: var(--text-muted);
    margin: 0;
}

.caption {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Design Decisions */
.design-decisions {
    margin: 2rem 0;
}

.decision-item {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.decision-item h4 {
    margin: 0 0 1rem;
    color: var(--accent-primary);
}

.decision-item p {
    margin-bottom: 0.75rem;
}

/* Design Showcase */
.design-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    margin: 3rem 0;
}

.design-screen {
    text-align: center;
}

.screen-mockup {
    background: var(--bg-secondary);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.mockup-header {
    background: var(--bg-tertiary);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mockup-dots {
    display: flex;
    gap: 0.5rem;
}

.mockup-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
}

.mockup-title {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.mockup-content {
    padding: 2rem;
    min-height: 400px;
}

.mockup-content.dashboard {
    display: flex;
    gap: 1.5rem;
}

.mock-sidebar {
    width: 60px;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.mock-nav-item {
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.mock-nav-item.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
}

.mock-main {
    flex: 1;
}

.mock-header {
    height: 50px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.mock-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.mock-stat {
    height: 80px;
    background: var(--bg-tertiary);
    border-radius: 12px;
}

.mock-workflow-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mock-workflow-item {
    height: 60px;
    background: var(--bg-tertiary);
    border-radius: 12px;
}

.mockup-content.builder {
    display: flex;
    flex-direction: column;
}

.mock-toolbar {
    height: 50px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.mock-canvas {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    position: relative;
}

.mock-node {
    width: 100px;
    height: 100px;
    border-radius: 16px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
}

.mock-node.trigger {
    border-color: var(--accent-primary);
}

.mock-node.action {
    border-color: var(--accent-secondary);
}

.mock-connector {
    width: 40px;
    height: 2px;
    background: var(--border-color);
}

.mock-ai-panel {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 200px;
    background: var(--bg-tertiary);
    border-radius: 12px;
}

/* Testing Findings */
.testing-findings {
    margin: 2rem 0;
}

.finding-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.finding-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.finding-label {
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.finding-label.issue {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.finding-label.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.finding-card h4 {
    margin: 0 0 1rem;
}

.finding-card p {
    margin-bottom: 0.75rem;
}

/* Metrics Table */
.metrics-table {
    margin: 2rem 0;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-secondary);
    border-radius: 16px;
    overflow: hidden;
}

thead {
    background: var(--bg-tertiary);
}

th, td {
    padding: 1.25rem;
    text-align: left;
}

th {
    color: var(--accent-primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

td {
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin: 3rem 0;
}

.result-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.result-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.result-icon i {
    font-size: 1.8rem;
    color: var(--bg-primary);
}

.result-card h4 {
    margin: 0 0 1rem;
}

.result-card p {
    margin: 0;
}

/* Learnings */
.learnings-list {
    margin: 2rem 0;
}

.learning-item {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.learning-item i {
    font-size: 2rem;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.learning-item h4 {
    margin: 0 0 0.5rem;
}

.learning-item p {
    margin: 0;
}

/* CTA Section */
.cta-section {
    display: flex;
    gap: 1.5rem;
    margin: 3rem 0;
    justify-content: center;
}

.cta-button {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #0A0E27;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.3);
}

.cta-button.secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.cta-button.secondary:hover {
    border-color: var(--accent-primary);
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    margin-top: 4rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .sidebar {
        position: static;
        margin-bottom: 2rem;
    }

    .project-meta-grid,
    .impact-metrics,
    .research-methods,
    .personas-grid,
    .journey-container,
    .principles-grid,
    .wireframe-grid,
    .design-showcase,
    .results-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .case-hero h1 {
        font-size: 2.5rem;
    }

    .lead {
        font-size: 1.1rem;
    }

    .main-content h2 {
        font-size: 2rem;
    }

    .main-content h3 {
        font-size: 1.5rem;
    }

    .cta-section {
        flex-direction: column;
    }
}

::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}