/* ============================================================
   Home Page Styles
   ============================================================ */

/* Hero Section */
.hero {
    background: linear-gradient(
        135deg,
        var(--color-bg-primary) 0%,
        var(--color-bg-secondary) 50%,
        var(--color-bg-tertiary) 100%
    );
    padding: var(--space-24) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    font-weight: var(--font-weight-semibold);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-12);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--space-6);
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .hero {
        padding: var(--space-16) 0;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-xl);
    }

    .hero-description {
        font-size: var(--font-size-base);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        min-width: 200px;
    }
}

/* Features Section */
.features {
    background-color: var(--color-bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
}

.feature-card {
    background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.feature-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.2);
}

/* Primary Featured Cards (First 3) */
.feature-card-primary,
.feature-card-secondary,
.feature-card-tertiary {
    grid-column: 1 / -1;
    border: 2px solid var(--color-border);
    padding: var(--space-10);
}

@media (min-width: 1024px) {
    .feature-card-primary,
    .feature-card-secondary,
    .feature-card-tertiary {
        grid-column: auto;
    }
}

.feature-card-primary {
    border-color: var(--color-primary);
    background: linear-gradient(135deg,
        rgba(59, 130, 246, 0.1),
        rgba(59, 130, 246, 0.05));
}

.feature-card-primary:hover {
    border-color: var(--color-primary-hover);
    box-shadow: 0 20px 50px rgba(59, 130, 246, 0.3);
}

.feature-card-secondary {
    border-color: var(--color-secondary);
    background: linear-gradient(135deg,
        rgba(6, 182, 212, 0.1),
        rgba(6, 182, 212, 0.05));
}

.feature-card-secondary:hover {
    border-color: var(--color-secondary-hover);
    box-shadow: 0 20px 50px rgba(6, 182, 212, 0.3);
}

.feature-card-tertiary {
    border-color: var(--color-accent);
    background: linear-gradient(135deg,
        rgba(249, 115, 22, 0.1),
        rgba(249, 115, 22, 0.05));
}

.feature-card-tertiary:hover {
    border-color: var(--color-accent-hover);
    box-shadow: 0 20px 50px rgba(249, 115, 22, 0.3);
}

.feature-example {
    background-color: var(--color-bg-tertiary);
    border-left: 3px solid currentColor;
    padding: var(--space-4) var(--space-6);
    margin-top: var(--space-6);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: left;
}

.feature-card-primary .feature-example {
    border-left-color: var(--color-primary);
}

.feature-card-secondary .feature-example {
    border-left-color: var(--color-secondary);
}

.feature-card-tertiary .feature-example {
    border-left-color: var(--color-accent);
}

.feature-icon {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--space-4);
    display: block;
}

.feature-card h3 {
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

/* Message Flow Section */
.message-flow {
    background-color: var(--color-bg-secondary);
}

.message-flow .container {
    text-align: center;
}

.mermaid {
    display: flex;
    justify-content: center;
    margin-top: var(--space-8);
    padding: var(--space-8);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow-x: auto;
}

.mermaid svg {
    min-width: 100%;
}

@media (max-width: 768px) {
    .mermaid {
        padding: var(--space-4);
        overflow-x: auto;
    }
}

/* Core Concepts Section */
.concepts {
    background-color: var(--color-bg-primary);
}

.concepts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
}

.concept-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--transition-base);
}

.concept-card:hover {
    border-color: var(--color-secondary);
    box-shadow: 0 10px 30px rgba(6, 182, 212, 0.15);
    transform: translateY(-4px);
}

.concept-card h3 {
    color: var(--color-secondary);
    margin-bottom: var(--space-4);
}

.concept-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

/* Scalability Section */
.scalability {
    background-color: var(--color-bg-secondary);
}

.scalability-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.scalability-text h3 {
    color: var(--color-text-primary);
    margin-bottom: var(--space-6);
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    padding: var(--space-4) 0;
    padding-left: var(--space-8);
    position: relative;
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: var(--font-weight-bold);
}

.scalability-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.stat-box {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    text-align: center;
    color: white;
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

@media (max-width: 768px) {
    .scalability-content {
        grid-template-columns: 1fr;
    }

    .scalability-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-box {
        padding: var(--space-6);
    }

    .stat-number {
        font-size: var(--font-size-2xl);
    }
}

/* Comparison Table */
.comparison {
    background-color: var(--color-bg-primary);
}

.comparison-table {
    overflow-x: auto;
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-xl);
}

.comparison-table tbody tr:nth-child(odd) {
    background-color: var(--color-bg-tertiary);
}

.comparison-table tbody tr:hover {
    background-color: var(--color-bg-hover);
}

.comparison-table .checkmark {
    color: var(--color-success);
    font-weight: var(--font-weight-bold);
}

@media (max-width: 768px) {
    .comparison-table {
        font-size: var(--font-size-sm);
    }

    .comparison-table th,
    .comparison-table td {
        padding: var(--space-3);
    }
}

/* Use Cases Preview */
.use-cases-preview {
    background-color: var(--color-bg-secondary);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

.use-case-card {
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    text-align: center;
    transition: all var(--transition-base);
}

.use-case-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-6px);
    box-shadow: 0 15px 40px rgba(249, 115, 22, 0.15);
}

.use-case-card h3 {
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.use-case-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

.cta-link {
    text-align: center;
    margin-top: var(--space-12);
}

.cta-link a {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.cta-link a:hover {
    color: var(--color-primary-hover);
    background-color: var(--color-bg-hover);
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    text-align: center;
    padding: var(--space-20) 0;
}

.cta h2 {
    color: white;
    margin-bottom: var(--space-4);
}

.cta p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-8);
    opacity: 0.95;
}

.btn-large {
    margin-top: var(--space-4);
}

@media (max-width: 768px) {
    .cta {
        padding: var(--space-12) 0;
    }

    .cta h2 {
        font-size: var(--font-size-2xl);
    }
}

/* Responsive Grid Adjustments */
@media (max-width: 768px) {
    .features-grid,
    .concepts-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
}