/* --- Global Styling Reset & Variables --- */
:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #11182c;
    --bg-card: rgba(23, 32, 59, 0.4);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 242, 254, 0.15);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --color-cyan: #00f2fe;
    --color-purple: #7000ff;
    --color-pink: #f355a0;
    --color-blue: #3b82f6;
    --color-emerald: #10b981;
    --color-red: #ef4444;

    --gradient-hero: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-blue) 50%, var(--color-purple) 100%);
    --gradient-glow: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, rgba(112, 0, 255, 0.15) 50%, transparent 100%);
    
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #334155;
}

/* Decorative top gradient bar */
.top-gradient-bar {
    height: 4px;
    background: var(--gradient-hero);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

/* --- Typography Helpers --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Layout Utility Classes --- */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 24px;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tagline {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-cyan);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 16px;
    font-weight: 800;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* --- Header / Navigation --- */
.main-header {
    position: fixed;
    top: 4px;
    left: 0;
    right: 0;
    z-index: 999;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background-color: rgba(10, 14, 26, 0.7);
    border-bottom: 1px solid var(--border-color);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 12px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.4rem;
    line-height: 1;
    letter-spacing: 0.05em;
}

.logo-subtitle {
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition-fast);
}

.nav-btn:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.15);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-fast);
}

/* --- Hero Section --- */
.hero-section {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 100px;
    overflow: hidden;
}

.hero-background-effects {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    pointer-events: none;
}

.bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.25;
}

.glow-cyan {
    top: -10%;
    left: 10%;
    background-color: var(--color-cyan);
}

.glow-purple {
    bottom: 10%;
    right: 10%;
    background-color: var(--color-purple);
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 50px 50px;
    background-position: center;
}

.hero-container {
    position: relative;
    z-index: 2;
    max-width: 850px;
    padding: 0 24px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--color-cyan);
    box-shadow: 0 0 10px var(--color-cyan);
    display: inline-block;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.15;
    margin-bottom: 24px;
    font-weight: 800;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-weight: 300;
    line-height: 1.6;
}

.hero-ctas {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.cta-primary {
    background: var(--gradient-hero);
    color: #fff;
    padding: 16px 36px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.25);
    border: none;
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 242, 254, 0.4);
}

.cta-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 16px 36px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-fast);
}

.cta-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

/* --- Animations --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.8s ease-out forwards;
}

.animate-slide-up {
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-slide-up-delayed {
    opacity: 0;
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
}

.animate-slide-up-delayed-more {
    opacity: 0;
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards;
}

/* --- SME Expertise Section --- */
.expertise-section {
    background-color: var(--bg-secondary);
    position: relative;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.expertise-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 48px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.expertise-card:hover {
    border-color: rgba(0, 242, 254, 0.3);
    box-shadow: 0 10px 30px rgba(0, 242, 254, 0.05);
    transform: translateY(-4px);
}

.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-hero);
    opacity: 0;
    transition: var(--transition-fast);
}

.expertise-card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 56px;
    height: 56px;
    background-color: rgba(0, 242, 254, 0.06);
    border: 1px solid rgba(0, 242, 254, 0.15);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-cyan);
    margin-bottom: 28px;
}

.expertise-card:nth-child(2) .card-icon {
    background-color: rgba(112, 0, 255, 0.06);
    border-color: rgba(112, 0, 255, 0.15);
    color: var(--color-purple);
}

.expertise-card:nth-child(3) .card-icon {
    background-color: rgba(0, 242, 254, 0.06);
    border-color: rgba(0, 242, 254, 0.15);
    color: var(--color-cyan);
}

.expertise-card:nth-child(4) .card-icon {
    background-color: rgba(112, 0, 255, 0.06);
    border-color: rgba(112, 0, 255, 0.15);
    color: var(--color-purple);
}

.step-num {
    font-size: 0.75rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-cyan);
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.expertise-card:nth-child(2) .step-num,
.expertise-card:nth-child(4) .step-num {
    color: var(--color-purple);
}

.card-title {
    font-size: 1.6rem;
    margin-bottom: 16px;
}

.card-description {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 28px;
    line-height: 1.6;
}

.card-bullets {
    list-style: none;
}

.card-bullets li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.card-bullets li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--color-cyan);
}

.expertise-card:nth-child(2) .card-bullets li::before,
.expertise-card:nth-child(4) .card-bullets li::before {
    background-color: var(--color-purple);
}

/* --- Interactive ER Sandbox Section --- */
.sandbox-section {
    position: relative;
}

.sandbox-wrapper {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 40px;
    align-items: start;
}

/* Left Control Panel */
.sandbox-controls {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
}

.controls-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 600;
}

.preset-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.preset-btn {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition-fast);
}

.preset-btn:hover {
    border-color: rgba(255,255,255,0.15);
    color: var(--text-primary);
}

.preset-btn.active {
    background-color: rgba(0, 242, 254, 0.08);
    border-color: var(--color-cyan);
    color: var(--color-cyan);
}

.custom-input-area {
    margin-bottom: 24px;
}

.records-editor-container {
    background: #060912;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 12px;
}

#records-json-input {
    width: 100%;
    height: 180px;
    background: transparent;
    border: none;
    color: #38bdf8; /* Light blue code color */
    font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, Courier, monospace;
    font-size: 0.75rem;
    padding: 12px;
    resize: vertical;
    outline: none;
    line-height: 1.5;
}

.control-actions {
    display: flex;
    gap: 12px;
}

.btn-run {
    flex: 1;
    background: var(--color-cyan);
    color: var(--bg-primary);
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.btn-run:hover {
    background: #00d6e2;
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
}

.btn-reset {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 12px 18px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-reset:hover {
    border-color: rgba(255,255,255,0.15);
    color: var(--text-primary);
}

.blocking-keys-display {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.key-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.key-tag {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: var(--font-heading);
    font-weight: 500;
}

/* Right Visualization Grid */
.sandbox-visualization {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.vis-column {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    min-height: 480px;
    overflow: hidden;
}

.column-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(255,255,255,0.01);
}

.column-step {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 4px;
}

.column-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.column-body {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
    max-height: 600px;
}

/* Pipeline Cards styling */
.entity-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    position: relative;
    transition: var(--transition-fast);
    animation: fadeInUp 0.4s ease-out forwards;
}

.entity-card:hover {
    border-color: rgba(255,255,255,0.15);
}

.entity-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.entity-id {
    font-size: 0.7rem;
    font-family: monospace;
    color: var(--text-muted);
}

.entity-tag-source {
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.tag-crm { background: rgba(59, 130, 246, 0.15); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.2); }
.tag-erp { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.2); }
.tag-marketing { background: rgba(245, 158, 11, 0.15); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.2); }

.entity-name {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.entity-details {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.entity-details span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Cluster Box */
.cluster-box {
    background-color: rgba(255,255,255,0.01);
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    padding: 12px;
    animation: fadeInUp 0.4s ease-out forwards;
}

.cluster-title-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.cluster-name {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-cyan);
}

.cluster-key-val {
    font-size: 0.65rem;
    font-family: monospace;
    background-color: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--color-cyan);
}

.cluster-members {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.member-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.member-name {
    font-weight: 500;
}

.member-source {
    font-size: 0.6rem;
    color: var(--text-muted);
}

/* Golden Card */
.golden-card {
    background-color: rgba(0, 242, 254, 0.03);
    border: 1px solid rgba(0, 242, 254, 0.25);
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.05);
    border-radius: 8px;
    padding: 16px;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.4s ease-out forwards;
}

.golden-card::after {
    content: 'GOLDEN';
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--color-cyan);
    color: var(--bg-primary);
    font-size: 0.55rem;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.golden-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-cyan);
    margin-bottom: 12px;
}

.golden-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px 16px;
}

.golden-field {
    display: flex;
    flex-direction: column;
}

.field-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 600;
}

.field-value {
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.field-value.null {
    color: var(--text-muted);
    font-style: italic;
}

/* --- Services & Architecture Grid --- */
.services-section {
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
    transition: var(--transition-normal);
}

.service-box:hover {
    border-color: rgba(255,255,255,0.15);
    transform: translateY(-2px);
}

.service-number {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
    line-height: 1;
}

.service-title {
    font-size: 1.25rem;
    margin-bottom: 14px;
}

.service-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Technical Reference Section --- */
.framework-glass-card {
    background: radial-gradient(circle at top left, rgba(0, 242, 254, 0.05), transparent),
                rgba(23, 32, 59, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 60px;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 60px;
    align-items: center;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.framework-content {
    max-width: 600px;
}

.framework-tag {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-cyan);
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 16px;
}

.framework-title {
    font-size: 2.2rem;
    margin-bottom: 20px;
    font-weight: 800;
}

.framework-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.6;
}

.framework-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-framework-view {
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-framework-view:hover {
    background: #fff;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.15);
}

.btn-framework-download {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
}

.btn-framework-download:hover {
    border-color: rgba(255,255,255,0.25);
    background-color: rgba(255,255,255,0.02);
}

/* Preview Graphic Right */
.framework-preview-graphic {
    background-color: rgba(6, 9, 18, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    height: 300px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 30px;
}

.graphic-node {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 16px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 2;
    position: relative;
}

.node-a { border-color: rgba(59, 130, 246, 0.3); color: #60a5fa; }
.node-b { border-color: rgba(0, 242, 254, 0.4); color: var(--color-cyan); box-shadow: 0 0 15px rgba(0, 242, 254, 0.1); }
.node-c { border-color: rgba(16, 185, 129, 0.3); color: #34d399; }

.graphic-line {
    width: 2px;
    background: linear-gradient(to bottom, var(--border-color), var(--color-cyan), var(--border-color));
    height: 30px;
    z-index: 1;
}

.graphic-details {
    margin-top: 10px;
    text-align: center;
    width: 100%;
}

.detail-row {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.detail-row span {
    color: var(--text-muted);
}

/* Expandable Framework Viewer Container */
.framework-doc-viewer {
    display: none;
    margin-top: 30px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.doc-viewer-header {
    background-color: rgba(255,255,255,0.02);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.doc-title {
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--color-cyan);
}

.btn-close-viewer {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    transition: var(--transition-fast);
}

.btn-close-viewer:hover {
    color: var(--text-primary);
}

.doc-viewer-content {
    padding: 40px;
    max-height: 600px;
    overflow-y: auto;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.doc-viewer-content h1, 
.doc-viewer-content h2, 
.doc-viewer-content h3 {
    color: var(--text-primary);
    margin-top: 24px;
    margin-bottom: 12px;
}

.doc-viewer-content h1 { font-size: 1.8rem; margin-top: 0; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }
.doc-viewer-content h2 { font-size: 1.4rem; }
.doc-viewer-content h3 { font-size: 1.1rem; }

.doc-viewer-content p {
    margin-bottom: 16px;
}

.doc-viewer-content ul, 
.doc-viewer-content ol {
    margin-left: 20px;
    margin-bottom: 16px;
}

.doc-viewer-content li {
    margin-bottom: 6px;
}

.doc-viewer-content pre {
    background-color: #060912;
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 20px;
    font-family: monospace;
    font-size: 0.85rem;
}

.doc-viewer-content code {
    background-color: #060912;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--color-cyan);
}

.doc-viewer-content pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
}

.doc-viewer-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.doc-viewer-content th, 
.doc-viewer-content td {
    border: 1px solid var(--border-color);
    padding: 10px 12px;
    text-align: left;
}

.doc-viewer-content th {
    background-color: rgba(255,255,255,0.02);
    color: var(--text-primary);
}

/* --- Contact & Inquiry Section --- */
.contact-section {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.contact-info {
    max-width: 500px;
}

.contact-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.contact-details-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-detail-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.detail-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background-color: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-cyan);
    flex-shrink: 0;
}

.contact-detail-item h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.contact-detail-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.contact-form-container {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.inquiry-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input, 
.form-group select, 
.form-group textarea {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition-fast);
    outline: none;
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    border-color: var(--color-cyan);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.1);
}

.form-group textarea {
    height: 120px;
    resize: none;
}

.btn-submit {
    background: var(--gradient-hero);
    color: #fff;
    border: none;
    padding: 16px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
}

.btn-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.3);
}

/* --- Footer --- */
.main-footer {
    background-color: #060912;
    border-top: 1px solid var(--border-color);
    padding: 80px 24px 40px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 80px;
    margin-bottom: 60px;
}

.footer-brand {
    max-width: 360px;
}

.footer-logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.05);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* --- Success Pop-up Modal --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(6, 9, 18, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.success-modal-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    max-width: 480px;
    text-align: center;
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .success-modal-card {
    transform: scale(1);
}

.success-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background-color: rgba(16, 185, 129, 0.1);
    border: 2px solid rgba(16, 185, 129, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.success-modal-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.success-modal-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 28px;
}

.btn-close-modal {
    background-color: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-close-modal:hover {
    background-color: var(--text-primary);
    color: var(--bg-primary);
}

/* --- Responsive Media Queries --- */
@media (max-width: 1024px) {
    .sandbox-wrapper {
        grid-template-columns: 1fr;
    }
    
    .sandbox-controls {
        max-width: 100%;
    }
    
    .framework-glass-card {
        grid-template-columns: 1fr;
        padding: 40px;
        gap: 40px;
    }
    
    .framework-preview-graphic {
        max-width: 500px;
        width: 100%;
        margin: 0 auto;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.6rem;
    }
    
    .hero-description {
        font-size: 1.05rem;
    }
    
    .hero-ctas {
        flex-direction: column;
        gap: 12px;
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .sandbox-visualization {
        grid-template-columns: 1fr;
    }
    
    .vis-column {
        min-height: 380px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    /* Navigation burger menu */
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--bg-primary);
        flex-direction: column;
        padding: 40px 24px;
        gap: 24px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}