/* ===================================
   OMNI Case Study - CORTX Style
   =================================== */

/* Variables */
:root {
    --cs-light-bg: #f5f1eb;
    --cs-dark-bg: #1a1a1a;
    --cs-light-text: #1a1a1a;
    --cs-dark-text: #f5f1eb;
    --cs-muted: #666;
    --cs-muted-light: #999;
    --cs-accent: #0066ff;
    --cs-critical: #ff4d4d;
    --cs-high: #ff9500;
    --cs-border-light: rgba(0,0,0,0.1);
    --cs-border-dark: rgba(255,255,255,0.1);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--cs-light-bg);
    color: var(--cs-light-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===================================
   Navigation
   =================================== */
.cs-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(245, 241, 235, 0.95);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 60px;
    z-index: 1000;
    border-bottom: 1px solid var(--cs-border-light);
}

.cs-nav-back {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--cs-light-text);
    font-size: 14px;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.cs-nav-back:hover {
    opacity: 0.6;
}

.cs-nav-back .material-symbols-outlined {
    font-size: 20px;
}

.cs-nav-progress {
    width: 200px;
    height: 2px;
    background: var(--cs-border-light);
    border-radius: 2px;
    overflow: hidden;
}

.cs-progress-bar {
    height: 100%;
    background: var(--cs-light-text);
    width: 0;
    transition: width 0.1s ease;
}

/* ===================================
   Hero Section
   =================================== */
.cs-hero {
    min-height: 100vh;
    padding: 140px 60px 80px;
    background: var(--cs-light-bg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
}

.cs-hero-content {
    max-width: 600px;
}

.cs-hero-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.cs-badge {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    background: var(--cs-light-text);
    color: var(--cs-light-bg);
    padding: 6px 14px;
    border-radius: 50px;
}

.cs-year {
    font-size: 13px;
    color: var(--cs-muted);
    font-weight: 500;
}

.cs-hero-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.cs-hero-subtitle {
    font-size: 18px;
    color: var(--cs-muted);
    line-height: 1.7;
    margin-bottom: 48px;
}

.cs-hero-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.cs-detail {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.cs-detail-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--cs-muted);
}

.cs-detail-value {
    font-size: 14px;
    font-weight: 500;
}

.cs-hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.cs-hero-phone {
    max-width: 100%;
    max-height: 70vh;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 30px 60px rgba(0,0,0,0.15));
    animation: heroPhoneFloat 6s ease-in-out infinite;
}

@keyframes heroPhoneFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.cs-image-placeholder {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 9/16;
    background: linear-gradient(145deg, #e8e4de, #d8d4ce);
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: var(--cs-muted);
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--cs-border-light);
}

.cs-image-placeholder .material-symbols-outlined {
    font-size: 48px;
    opacity: 0.5;
}

.cs-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.cs-scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(180deg, var(--cs-light-text), transparent);
    animation: scrollPulse 2s ease infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ===================================
   Sections - Base
   =================================== */
.cs-section {
    padding: 120px 60px;
    position: relative;
}

.cs-section-inner {
    max-width: 1200px;
    margin: 0 auto;
}

/* Light Section */
.cs-section-light {
    background: var(--cs-light-bg);
    color: var(--cs-light-text);
}

/* Dark Section */
.cs-section-dark {
    background: var(--cs-dark-bg);
    color: var(--cs-dark-text);
}

.cs-section-dark .cs-muted,
.cs-section-dark .cs-detail-label,
.cs-section-dark .cs-intro-text,
.cs-section-dark .cs-persona-desc,
.cs-section-dark .cs-ownership-list {
    color: var(--cs-muted-light);
}

/* Section Header */
.cs-section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 60px;
}

.cs-section-num {
    font-size: 14px;
    font-weight: 600;
    opacity: 0.5;
}

.cs-section-divider {
    font-size: 14px;
    opacity: 0.3;
}

.cs-section-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

/* ===================================
   Typography
   =================================== */
.cs-lead-text {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 32px;
    max-width: 800px;
}

.cs-body-text {
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 24px;
    max-width: 700px;
    color: inherit;
    opacity: 0.85;
}

.cs-intro-text {
    font-size: 18px;
    line-height: 1.7;
    color: var(--cs-muted);
    margin-bottom: 48px;
    max-width: 700px;
}

.cs-subsection-title {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin: 60px 0 32px;
    opacity: 0.7;
}

.cs-caption {
    font-size: 14px;
    color: var(--cs-muted-light);
    margin-top: 40px;
    font-style: italic;
}

/* Highlight - Soft underline that sweeps in */
.cs-highlight {
    position: relative;
    display: inline;
    color: inherit;
}

.cs-highlight::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 2px;
    height: 8px;
    background: linear-gradient(90deg, rgba(180, 160, 140, 0.35), rgba(160, 140, 120, 0.25));
    z-index: -1;
    transform: scaleX(0) skewX(-15deg);
    transform-origin: left;
    transition: transform 1s cubic-bezier(0.22, 1, 0.36, 1);
}

.cs-highlight.cs-highlight-active::after {
    transform: scaleX(1) skewX(-15deg);
}

/* Accent Highlight - Slightly warmer tone, sweeps from right */
.cs-highlight-accent {
    position: relative;
    display: inline;
    color: inherit;
}

.cs-highlight-accent::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 2px;
    height: 8px;
    background: linear-gradient(90deg, rgba(200, 150, 130, 0.3), rgba(180, 130, 110, 0.2));
    z-index: -1;
    transform: scaleX(0) skewX(10deg);
    transform-origin: right;
    transition: transform 1.2s cubic-bezier(0.22, 1, 0.36, 1) 0.15s;
}

.cs-highlight-accent.cs-highlight-active::after {
    transform: scaleX(1) skewX(10deg);
}

/* Keyword - Subtle color shift with fade-slide in */
.cs-keyword {
    color: #d4c4b0;
    font-weight: 500;
    opacity: 0;
    transform: translateY(12px) translateX(-8px);
    display: inline-block;
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), 
                transform 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                color 0.3s ease;
    filter: blur(4px);
}

.cs-keyword.cs-keyword-active {
    opacity: 1;
    transform: translateY(0) translateX(0);
    filter: blur(0);
}

/* Light section keyword */
.cs-section-light .cs-keyword {
    color: #8a7a68;
}

/* Keyword light - for dark text areas */
.cs-keyword-light {
    color: #c8b8a0;
    font-weight: 500;
    opacity: 0;
    transform: translateY(12px) translateX(-8px);
    display: inline-block;
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), 
                transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    filter: blur(4px);
}

.cs-keyword-light.cs-keyword-active {
    opacity: 1;
    transform: translateY(0) translateX(0);
    filter: blur(0);
}

.cs-section-light .cs-keyword-light {
    color: #6a5a48;
}

/* Quote highlight - gentle wave animation */
.cs-quote-highlight {
    position: relative;
    display: inline;
}

.cs-quote-highlight::after {
    content: '';
    position: absolute;
    left: -6px;
    right: -6px;
    bottom: 4px;
    height: 10px;
    background: linear-gradient(90deg, rgba(180, 160, 140, 0.25), rgba(160, 140, 120, 0.35), rgba(180, 160, 140, 0.25));
    z-index: -1;
    transform: scaleX(0) scaleY(0.3);
    transform-origin: center;
    transition: transform 1.4s cubic-bezier(0.22, 1, 0.36, 1) 0.2s;
    border-radius: 4px;
}

.cs-quote-highlight.cs-highlight-active::after {
    transform: scaleX(1) scaleY(1);
}

/* Quote */
.cs-quote {
    position: relative;
    padding: 48px 0;
    margin: 48px 0;
    border-top: 1px solid var(--cs-border-dark);
    border-bottom: 1px solid var(--cs-border-dark);
    max-width: 700px;
}

.cs-quote-icon {
    position: absolute;
    top: 20px;
    left: 0;
    font-size: 80px;
    line-height: 1;
    opacity: 0.15;
    font-family: Georgia, serif;
}

.cs-quote p {
    font-size: clamp(20px, 2.5vw, 26px);
    font-weight: 500;
    line-height: 1.5;
    font-style: italic;
    padding-left: 24px;
}

.cs-section-light .cs-quote {
    border-color: var(--cs-border-light);
}

/* ===================================
   Section 02 - Ownership Cards
   =================================== */
.cs-ownership-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.cs-ownership-card {
    background: rgba(0,0,0,0.03);
    border: 1px solid var(--cs-border-light);
    border-radius: 16px;
    padding: 32px 24px;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                box-shadow 0.5s ease,
                border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cs-ownership-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #b4a08c, #8a7a68);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.cs-ownership-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 30px 80px rgba(0,0,0,0.15);
    border-color: rgba(180, 160, 140, 0.4);
}

.cs-ownership-card:hover::before {
    transform: scaleX(1);
}

.cs-ownership-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--cs-light-text);
    color: var(--cs-light-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: transform 0.4s ease, background 0.3s ease;
}

.cs-ownership-card:hover .cs-ownership-icon {
    transform: scale(1.1) rotate(-5deg);
    background: linear-gradient(135deg, #1a1a1a, #333);
}

.cs-ownership-icon .material-symbols-outlined {
    font-size: 24px;
    transition: transform 0.3s ease;
}

.cs-ownership-card:hover .cs-ownership-icon .material-symbols-outlined {
    transform: scale(1.1);
}

.cs-ownership-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

.cs-ownership-list {
    list-style: none;
    font-size: 14px;
    color: var(--cs-muted);
    line-height: 1.8;
}

.cs-ownership-list li {
    position: relative;
    padding-left: 16px;
    transition: transform 0.3s ease, color 0.3s ease;
}

.cs-ownership-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    opacity: 0.5;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.cs-ownership-card:hover .cs-ownership-list li {
    transform: translateX(4px);
}

.cs-ownership-card:hover .cs-ownership-list li::before {
    opacity: 1;
    transform: translateX(2px);
}

/* ===================================
   Section 03 - Persona Cards
   =================================== */
.cs-persona-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.cs-persona-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--cs-border-dark);
    border-radius: 16px;
    padding: 40px 32px;
    text-align: center;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                background 0.4s ease,
                border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cs-persona-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(180, 160, 140, 0.12) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.cs-persona-card:hover::before {
    opacity: 1;
}

.cs-persona-card:hover {
    transform: translateY(-12px) scale(1.02);
    background: rgba(255,255,255,0.06);
    border-color: rgba(180, 160, 140, 0.4);
}

.cs-persona-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #333, #1a1a1a);
    border: 1px solid var(--cs-border-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
                box-shadow 0.4s ease;
}

.cs-persona-card:hover .cs-persona-icon {
    transform: scale(1.15);
    box-shadow: 0 10px 30px rgba(180, 160, 140, 0.25);
}

.cs-persona-icon .material-symbols-outlined {
    font-size: 28px;
    color: var(--cs-dark-text);
    transition: transform 0.3s ease;
}

.cs-persona-card:hover .cs-persona-icon .material-symbols-outlined {
    transform: scale(1.1);
}

.cs-persona-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
}

.cs-persona-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--cs-muted-light);
}

.cs-callout {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--cs-border-dark);
    border-left: 3px solid #b4a08c;
    border-radius: 12px;
    padding: 24px;
    font-size: 15px;
    transition: transform 0.3s ease, background 0.3s ease;
}

.cs-callout:hover {
    transform: translateX(8px);
    background: rgba(180, 160, 140, 0.08);
}

.cs-callout .material-symbols-outlined {
    font-size: 24px;
    opacity: 0.7;
    flex-shrink: 0;
    color: #c8b8a0;
}

/* ===================================
   Section 04 - Problems
   =================================== */
.cs-problems-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.cs-problem-item {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: rgba(0,0,0,0.02);
    border: 1px solid var(--cs-border-light);
    border-radius: 16px;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                box-shadow 0.4s ease,
                border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cs-problem-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--cs-muted);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.cs-problem-item.cs-problem-critical::before {
    background: linear-gradient(180deg, var(--cs-critical), #ff8080);
}

.cs-problem-item.cs-problem-high::before {
    background: linear-gradient(180deg, var(--cs-high), #ffbb33);
}

.cs-problem-item:hover::before {
    transform: scaleY(1);
}

.cs-problem-item:hover {
    transform: translateX(12px);
    box-shadow: 0 15px 50px rgba(0,0,0,0.1);
    border-color: transparent;
}

.cs-problem-severity {
    flex-shrink: 0;
}

.cs-severity-badge {
    display: inline-block;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 6px 12px;
    border-radius: 50px;
}

.cs-severity-badge.critical {
    background: rgba(255, 77, 77, 0.1);
    color: var(--cs-critical);
    border: 1px solid rgba(255, 77, 77, 0.3);
}

.cs-severity-badge.high {
    background: rgba(255, 149, 0, 0.1);
    color: var(--cs-high);
    border: 1px solid rgba(255, 149, 0, 0.3);
}

.cs-problem-content {
    flex: 1;
}

.cs-problem-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.cs-problem-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--cs-muted);
}

/* ===================================
   Section 05 - Research / Feedback
   =================================== */
.cs-research-intro {
    margin-bottom: 60px;
}

.cs-ai-note {
    display: flex;
    gap: 20px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--cs-border-dark);
    border-radius: 12px;
    padding: 28px;
    margin-top: 32px;
}

.cs-ai-note .material-symbols-outlined {
    font-size: 28px;
    opacity: 0.7;
    flex-shrink: 0;
}

.cs-ai-note strong {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
}

.cs-ai-note p {
    font-size: 14px;
    line-height: 1.7;
    opacity: 0.8;
}

.cs-feedback-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 16px;
}

.cs-feedback-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--cs-border-dark);
    border-radius: 16px;
    padding: 28px;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                background 0.3s ease,
                border-color 0.3s ease;
    position: relative;
}

.cs-feedback-card::before {
    content: '"';
    position: absolute;
    top: 16px;
    right: 24px;
    font-size: 60px;
    font-family: Georgia, serif;
    opacity: 0.1;
    line-height: 1;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.cs-feedback-card:hover::before {
    opacity: 0.25;
    transform: scale(1.1);
}

.cs-feedback-card:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.06);
    border-color: rgba(180, 160, 140, 0.25);
}

.cs-feedback-source {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--cs-muted-light);
    margin-bottom: 16px;
}

.cs-feedback-source .material-symbols-outlined {
    font-size: 16px;
}

.cs-feedback-text {
    font-size: 15px;
    line-height: 1.7;
    font-style: italic;
    opacity: 0.9;
}

/* Stats Grid */
.cs-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 60px;
}

.cs-stat-card {
    text-align: center;
    padding: 40px 24px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--cs-border-dark);
    border-radius: 16px;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                background 0.4s ease,
                box-shadow 0.4s ease;
    position: relative;
    overflow: hidden;
}

.cs-stat-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(180, 160, 140, 0.15) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.cs-stat-card:hover::before {
    opacity: 1;
}

.cs-stat-card:hover {
    transform: scale(1.05) translateY(-8px);
    background: rgba(255,255,255,0.06);
    box-shadow: 0 30px 80px rgba(0,0,0,0.3);
}

.cs-stat-number {
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 700;
    line-height: 1;
    display: inline-block;
    background: linear-gradient(135deg, #fff, #d4c4b0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cs-stat-suffix {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 600;
    opacity: 0.7;
    background: linear-gradient(135deg, #fff, #c8b8a0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cs-stat-label {
    font-size: 15px;
    font-weight: 600;
    margin: 16px 0 8px;
}

.cs-stat-detail {
    font-size: 13px;
    color: var(--cs-muted-light);
    line-height: 1.6;
}

/* ===================================
   Section 06 - Decisions
   =================================== */
.cs-decisions-list {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.cs-decision-item {
    display: flex;
    gap: 40px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--cs-border-light);
    transition: transform 0.4s ease;
    position: relative;
}

.cs-decision-item:hover {
    transform: translateX(8px);
}

.cs-decision-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.cs-decision-num {
    font-size: 56px;
    font-weight: 700;
    flex-shrink: 0;
    width: 80px;
    line-height: 1;
    background: linear-gradient(135deg, rgba(180, 160, 140, 0.6), rgba(140, 120, 100, 0.3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform 0.4s ease;
}

.cs-decision-item:hover .cs-decision-num {
    transform: scale(1.1);
}

.cs-decision-content {
    flex: 1;
}

.cs-decision-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
}

.cs-decision-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--cs-muted);
}

.cs-tradeoff {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-top: 20px;
    padding: 20px;
    background: rgba(0,0,0,0.03);
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.7;
}

.cs-tradeoff .material-symbols-outlined {
    font-size: 20px;
    opacity: 0.6;
    flex-shrink: 0;
    margin-top: 2px;
}

.cs-tradeoff p {
    color: var(--cs-muted);
}

/* ===================================
   Section 07 - Video
   =================================== */
.cs-video-container {
    margin-bottom: 32px;
}

.cs-video-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    max-width: 900px;
    margin: 0 auto;
    background: linear-gradient(145deg, #2a2a2a, #1a1a1a);
    border: 1px solid var(--cs-border-dark);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: var(--cs-muted-light);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.cs-video-placeholder:hover {
    transform: scale(1.02);
    box-shadow: 0 30px 80px rgba(0,0,0,0.5);
}

.cs-video-placeholder .material-symbols-outlined {
    font-size: 72px;
    opacity: 0.6;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.cs-video-placeholder:hover .material-symbols-outlined {
    opacity: 1;
    transform: scale(1.1);
}

/* Video Player */
.cs-video-player {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    display: block;
    border-radius: 20px;
    background: #0a0a0a;
    box-shadow: 0 30px 80px rgba(0,0,0,0.5);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.cs-video-player:hover {
    transform: scale(1.01);
    box-shadow: 0 40px 100px rgba(0,0,0,0.6);
}

/* Custom video controls styling */
.cs-video-player::-webkit-media-controls-panel {
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
}

/* Video Container - for positioning toggle */
.cs-video-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

/* Sound Toggle Button */
.cs-video-sound-toggle {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
}

.cs-video-sound-toggle:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: scale(1.1);
}

.cs-video-sound-toggle.sound-on {
    background: rgba(255, 255, 255, 0.9);
    color: #1a1a1a;
}

.cs-video-sound-toggle .material-symbols-outlined {
    font-size: 24px;
}

.cs-video-caption {
    font-size: 15px;
    line-height: 1.8;
    color: var(--cs-muted-light);
    max-width: 800px;
    margin: 32px auto 0;
    text-align: center;
}

/* ===================================
   Section 08 - Results
   =================================== */
.cs-results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.cs-result-card {
    padding: 40px 32px;
    background: rgba(0,0,0,0.02);
    border: 1px solid var(--cs-border-light);
    border-radius: 16px;
    text-align: center;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                box-shadow 0.4s ease,
                border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cs-result-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 100%, rgba(180, 160, 140, 0.12) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.cs-result-card:hover::before {
    opacity: 1;
}

.cs-result-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 30px 80px rgba(0,0,0,0.15);
    border-color: rgba(180, 160, 140, 0.35);
}

.cs-result-card.cs-result-highlight {
    background: linear-gradient(135deg, var(--cs-light-text), #2a2a2a);
    color: var(--cs-light-bg);
    border: none;
}

.cs-result-card.cs-result-highlight:hover {
    box-shadow: 0 30px 100px rgba(0,0,0,0.3);
}

.cs-result-card.cs-result-highlight .cs-result-detail {
    color: rgba(245, 241, 235, 0.7);
}

.cs-result-card.cs-result-highlight .cs-result-number {
    background: linear-gradient(135deg, #fff, #d4c4b0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cs-result-card.cs-result-feature {
    grid-column: span 2;
}

.cs-result-metric {
    margin-bottom: 16px;
}

.cs-result-number {
    font-size: clamp(40px, 5vw, 56px);
    font-weight: 700;
    line-height: 1;
}

.cs-result-range {
    font-size: clamp(36px, 4.5vw, 48px);
    font-weight: 700;
    line-height: 1;
    background: linear-gradient(135deg, var(--cs-light-text), #666);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cs-result-suffix {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 600;
    opacity: 0.7;
}

.cs-result-icon .material-symbols-outlined {
    font-size: 48px;
    opacity: 0.8;
    transition: transform 0.3s ease;
}

.cs-result-card:hover .cs-result-icon .material-symbols-outlined {
    transform: scale(1.2);
}

.cs-result-label {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.cs-result-detail {
    font-size: 13px;
    color: var(--cs-muted);
    line-height: 1.6;
}

/* ===================================
   Section 09 - Learnings
   =================================== */
.cs-learnings {
    max-width: 800px;
}

.cs-learning-block {
    margin-bottom: 48px;
}

.cs-learning-lead {
    font-size: clamp(22px, 2.5vw, 28px);
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 48px;
}

.cs-learning-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
}

.cs-learning-text {
    font-size: 16px;
    line-height: 1.8;
    opacity: 0.85;
}

.cs-final-quote {
    padding: 48px 0;
    margin-top: 48px;
    border-top: 1px solid var(--cs-border-dark);
}

.cs-final-quote p {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 500;
    line-height: 1.4;
    font-style: italic;
    opacity: 0.9;
}

/* ===================================
   CTA Section
   =================================== */
.cs-cta-section {
    padding: 120px 60px;
    background: var(--cs-light-bg);
    text-align: center;
}

.cs-cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cs-cta-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 600;
    margin-bottom: 16px;
}

.cs-cta-subtitle {
    font-size: 20px;
    color: var(--cs-muted);
    margin-bottom: 40px;
}

.cs-cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.cs-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.cs-cta-primary {
    background: var(--cs-light-text);
    color: var(--cs-light-bg);
}

.cs-cta-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}

.cs-cta-primary .material-symbols-outlined {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.cs-cta-primary:hover .material-symbols-outlined {
    transform: translateX(4px);
}

.cs-cta-secondary {
    background: transparent;
    color: var(--cs-light-text);
    border: 1px solid var(--cs-border-light);
}

.cs-cta-secondary:hover {
    background: var(--cs-light-text);
    color: var(--cs-light-bg);
}

/* ===================================
   Footer
   =================================== */
.cs-footer {
    padding: 40px 60px;
    background: var(--cs-dark-bg);
    border-top: 1px solid var(--cs-border-dark);
}

.cs-footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cs-footer-copyright {
    font-size: 13px;
    color: var(--cs-muted-light);
}

.cs-footer-links {
    display: flex;
    gap: 32px;
}

.cs-footer-links a {
    font-size: 13px;
    color: var(--cs-dark-text);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.cs-footer-links a:hover {
    opacity: 0.6;
}

.cs-footer-text {
    font-size: 14px;
    color: var(--cs-muted-light);
    margin: 0;
}

.cs-footer-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--cs-dark-text);
    text-decoration: none;
    transition: color 0.3s ease, transform 0.3s ease;
}

.cs-footer-link:hover {
    color: var(--cs-accent);
    transform: translateX(-4px);
}

.cs-footer-link .material-symbols-outlined {
    font-size: 18px;
}

/* ===================================
   Animations
   =================================== */

/* Base animation class - more dramatic */
.cs-animate {
    opacity: 0;
    transform: translateY(60px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Slide from left animation */
.cs-animate-left {
    opacity: 0;
    transform: translateX(-80px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.cs-animate-left.cs-visible {
    opacity: 1;
    transform: translateX(0);
}

/* Slide from right animation */
.cs-animate-right {
    opacity: 0;
    transform: translateX(80px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.cs-animate-right.cs-visible {
    opacity: 1;
    transform: translateX(0);
}

/* Scale up animation */
.cs-animate-scale {
    opacity: 0;
    transform: scale(0.85);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.cs-animate-scale.cs-visible {
    opacity: 1;
    transform: scale(1);
}

/* Stagger delays for cards - longer delays for drama */
.cs-ownership-card:nth-child(1),
.cs-persona-card:nth-child(1),
.cs-feedback-card:nth-child(1),
.cs-stat-card:nth-child(1),
.cs-result-card:nth-child(1) { transition-delay: 0.15s; }

.cs-ownership-card:nth-child(2),
.cs-persona-card:nth-child(2),
.cs-feedback-card:nth-child(2),
.cs-stat-card:nth-child(2),
.cs-result-card:nth-child(2) { transition-delay: 0.3s; }

.cs-ownership-card:nth-child(3),
.cs-persona-card:nth-child(3),
.cs-feedback-card:nth-child(3),
.cs-stat-card:nth-child(3),
.cs-result-card:nth-child(3) { transition-delay: 0.45s; }

.cs-ownership-card:nth-child(4),
.cs-result-card:nth-child(4) { transition-delay: 0.6s; }

.cs-result-card:nth-child(5) { transition-delay: 0.75s; }

/* Decision items stagger - slower cascade */
.cs-decision-item:nth-child(1) { transition-delay: 0.1s; }
.cs-decision-item:nth-child(2) { transition-delay: 0.25s; }
.cs-decision-item:nth-child(3) { transition-delay: 0.4s; }
.cs-decision-item:nth-child(4) { transition-delay: 0.55s; }
.cs-decision-item:nth-child(5) { transition-delay: 0.7s; }

/* Problem items stagger - dramatic reveal */
.cs-problem-item:nth-child(1) { transition-delay: 0.1s; }
.cs-problem-item:nth-child(2) { transition-delay: 0.2s; }
.cs-problem-item:nth-child(3) { transition-delay: 0.3s; }
.cs-problem-item:nth-child(4) { transition-delay: 0.4s; }
.cs-problem-item:nth-child(5) { transition-delay: 0.5s; }

/* Learning blocks stagger */
.cs-learning-block:nth-child(1) { transition-delay: 0.1s; }
.cs-learning-block:nth-child(2) { transition-delay: 0.3s; }
.cs-learning-block:nth-child(3) { transition-delay: 0.5s; }

/* Floating animation for icons */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.cs-ownership-card:hover .cs-ownership-icon,
.cs-persona-card:hover .cs-persona-icon {
    animation: float 2s ease-in-out infinite;
}

/* Pulse animation for stats */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.cs-stat-card:hover .cs-stat-number {
    animation: pulse 1s ease-in-out infinite;
}

/* Glow effect for highlighted cards */
@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(180, 160, 140, 0.2); }
    50% { box-shadow: 0 0 40px rgba(180, 160, 140, 0.35); }
}

.cs-result-highlight:hover {
    animation: glow 2s ease-in-out infinite;
}

/* Section header line animation */
.cs-section-header::after {
    content: '';
    flex: 1;
    height: 1px;
    background: currentColor;
    opacity: 0.15;
    margin-left: 24px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1) 0.3s;
}

.cs-visible .cs-section-header::after {
    transform: scaleX(1);
}

/* ===================================
   Responsive
   =================================== */
@media (max-width: 1100px) {
    .cs-ownership-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .cs-hero {
        grid-template-columns: 1fr;
        padding: 120px 40px 60px;
        gap: 60px;
    }
    
    .cs-hero-image {
        order: -1;
    }
    
    .cs-image-placeholder {
        max-width: 280px;
        aspect-ratio: 9/14;
    }
    
    .cs-section {
        padding: 80px 40px;
    }
    
    .cs-persona-grid,
    .cs-feedback-grid,
    .cs-stats-grid,
    .cs-results-grid {
        grid-template-columns: 1fr;
    }
    
    .cs-result-card.cs-result-feature {
        grid-column: span 1;
    }
    
    .cs-decision-item {
        flex-direction: column;
        gap: 16px;
    }
    
    .cs-decision-num {
        width: auto;
    }
}

@media (max-width: 600px) {
    .cs-nav {
        padding: 0 24px;
    }
    
    .cs-hero {
        padding: 100px 24px 40px;
    }
    
    .cs-hero-details {
        grid-template-columns: 1fr;
    }
    
    .cs-section {
        padding: 60px 24px;
    }
    
    .cs-section-header {
        flex-wrap: wrap;
        margin-bottom: 40px;
    }
    
    .cs-ownership-grid {
        grid-template-columns: 1fr;
    }
    
    .cs-problem-item {
        flex-direction: column;
        gap: 16px;
    }
    
    .cs-cta-section {
        padding: 80px 24px;
    }
    
    .cs-cta-buttons {
        flex-direction: column;
    }
    
    .cs-footer {
        padding: 32px 24px;
    }
    
    .cs-footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}