/* ============================================
   Meridian Ribbon - Stylesheet
   ============================================ */

/* CSS Variables */
:root {
    --color-bg: #F6EDE1;
    --color-bg-soft: #F9F3E7;
    --color-card: #FFF7EC;
    --color-sidebar: #F2E3CF;
    
    --color-primary: #F48A6A;
    --color-primary-soft: #F8A26C;
    
    --color-accent-green: #2D6B4A;
    
    --color-text-main: #332B24;
    --color-text-muted: #7D6E5F;
    
    --color-border: #E3D6C2;
    --color-chip-bg: #FCE4DD;
    
    /* Legacy variable mappings for compatibility */
    --bg-primary: var(--color-bg);
    --bg-secondary: var(--color-bg-soft);
    --bg-alt: var(--color-card);
    --accent-primary: var(--color-primary);
    --accent-secondary: var(--color-primary-soft);
    --text-primary: var(--color-text-main);
    --text-secondary: var(--color-text-main);
    --text-muted: var(--color-text-muted);
    --gradient-gold: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-soft) 100%);
    --shadow-sm: 0 2px 8px rgba(51, 43, 36, 0.08);
    --shadow-md: 0 4px 16px rgba(51, 43, 36, 0.12);
    --shadow-lg: 0 8px 32px rgba(51, 43, 36, 0.16);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(246, 237, 225, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo:hover {
    color: var(--color-primary-soft);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text-main);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    padding-top: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-soft) 100%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content-full {
    grid-column: 1 / -1;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-info {
    margin: 1.5rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.hero-school {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin: 0.3rem 0;
}

.hero-name {
    color: var(--color-text-main);
    font-size: 1.1rem;
    font-weight: 500;
    margin: 0.3rem 0;
}

.hero-course {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin: 0.3rem 0;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    font-weight: 300;
}

.hero-hypothesis {
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-primary);
    border: 1px solid var(--color-border);
}

.hypothesis-title {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.hypothesis-text {
    font-size: 1.1rem;
    font-weight: 500;
    line-height: 1.5;
    max-width: 90%;
    margin: 0 auto;
}

.hero-image {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

.image-placeholder {
    background: var(--color-card);
    padding: 3rem;
    text-align: center;
    border: 2px dashed var(--color-primary);
    border-radius: var(--border-radius);
    color: var(--color-text-muted);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.image-placeholder-small {
    background: var(--color-card);
    padding: 2rem;
    text-align: center;
    border: 2px dashed var(--color-primary);
    border-radius: var(--border-radius);
    color: var(--color-text-muted);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.image-placeholder p,
.image-placeholder-small p {
    margin: 0.5rem 0;
}

/* Three Modes Section */
.modes-section {
    width: 100%;
    padding: 4rem 20px;
    background: var(--color-bg-soft);
}

.modes-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.mode-card {
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.mode-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.mode-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.mode-card h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.mode-card p {
    color: var(--color-text-main);
    margin-bottom: 0.5rem;
}

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

/* Sections */
.section {
    padding: 6rem 0;
    min-height: 50vh;
}

.section-alt {
    background: var(--color-bg-soft);
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-align: center;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 300;
}

.content-box {
    background: var(--color-card);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    line-height: 1.8;
    border: 1px solid var(--color-border);
}

.content-box p {
    margin-bottom: 1.5rem;
    color: var(--color-text-main);
    font-size: 1.1rem;
}

.placeholder-text {
    color: var(--color-text-muted);
    font-style: italic;
    text-align: center;
    padding: 2rem 0;
}

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

.image-item {
    border-radius: var(--border-radius);
    overflow: hidden;
}

/* System Architecture */
.system-architecture {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--color-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.system-architecture h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--color-primary);
}

.architecture-flow {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.flow-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--color-bg-soft);
    border-radius: var(--border-radius);
    min-width: 150px;
    border: 1px solid var(--color-border);
}

.flow-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.flow-item h4 {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.flow-item p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.flow-arrow {
    font-size: 2rem;
    color: var(--color-primary);
}

.flow-connection {
    text-align: center;
    margin-top: 1rem;
    padding: 1rem;
    background: var(--color-bg-soft);
    border-radius: var(--border-radius);
    color: var(--color-primary);
    font-weight: 600;
    border: 1px solid var(--color-border);
}

/* Code Example */
.code-example {
    margin-top: 3rem;
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.code-example h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.code-example pre {
    background: var(--color-sidebar);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    overflow-x: auto;
    border-left: 4px solid var(--color-primary);
}

.code-example code {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
    color: var(--color-text-main);
    line-height: 1.6;
}

/* Design Tags */
.design-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 2rem 0;
    justify-content: center;
}

.tag {
    background: var(--color-chip-bg);
    color: var(--color-text-main);
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
}

/* A/B Comparison */
.ab-comparison {
    margin-top: 3rem;
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.ab-comparison h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--color-primary);
    text-align: center;
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: center;
}

.comparison-item {
    background: var(--color-bg-soft);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.comparison-item h4 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.comparison-item ul {
    list-style: none;
}

.comparison-item li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-main);
}

.comparison-arrow {
    font-size: 3rem;
    color: var(--color-primary);
}

/* Precedents */
.precedents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.precedent-card {
    background: var(--color-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.precedent-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.precedent-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--color-bg-soft);
}

.precedent-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.precedent-card h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin: 1.5rem 1.5rem 1rem;
}

.precedent-card p {
    color: var(--color-text-main);
    margin: 0 1.5rem 1rem;
    line-height: 1.6;
}

.precedent-note {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-style: italic;
    margin: 0 1.5rem 1rem;
}

.precedent-link {
    display: inline-block;
    margin: 0 1.5rem 1.5rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.precedent-link:hover {
    color: var(--color-primary-soft);
}

/* Proof of Concept */
.prototype-demo {
    margin-bottom: 4rem;
}

.video-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.video-container-small {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: var(--border-radius);
}

.video-container-small iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-placeholder {
    background: var(--color-card);
    padding: 4rem;
    text-align: center;
    border: 2px dashed var(--color-primary);
    color: var(--color-text-muted);
    border-radius: var(--border-radius);
}

.video-placeholder p {
    margin: 0.5rem 0;
}

/* Timeline */
.timeline-section {
    margin: 4rem 0;
}

.timeline-section h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 2rem;
    text-align: center;
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.timeline-phase {
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-primary);
    border: 1px solid var(--color-border);
}

.timeline-phase h4 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.timeline-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.timeline-image {
    border-radius: var(--border-radius);
    overflow: hidden;
}

.timeline-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    border-radius: var(--border-radius);
}

/* Modes Detail */
.modes-detail {
    margin: 4rem 0;
}

.modes-detail h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 2rem;
    text-align: center;
}

.mode-card-detailed {
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--color-border);
}

.mode-card-detailed .mode-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.mode-card-detailed h4 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.mode-card-detailed p {
    color: var(--color-text-main);
    margin-bottom: 0.75rem;
    text-align: left;
}

.mode-image {
    margin-top: 1.5rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: var(--color-bg-soft);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 150px;
}

.mode-image svg {
    width: 100%;
    height: auto;
    max-height: 150px;
}

.mode-scenario {
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.mode-metaphor {
    color: var(--color-text-muted);
    font-style: italic;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.mode-feeling {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.mode-feeling p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.mode-feeling strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* Flow Visual Animation - Water Stream */
.flow-visual {
    overflow: visible;
}

.flow-visual .wave-group {
    animation: flowTranslate 4s linear infinite;
}

.flow-visual .wave {
    stroke-linecap: round;
}

.flow-visual .wave1 {
    opacity: 0.9;
}

.flow-visual .wave2 {
    opacity: 0.7;
}

.flow-visual .wave3 {
    opacity: 0.8;
}

.flow-visual .wave4 {
    opacity: 0.6;
}

@keyframes flowTranslate {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(150px);
    }
}

/* Sense Visual Animation - Atmospheric Particles */
.sense-visual {
    overflow: visible;
}

.sense-visual .particle {
    opacity: 0.5;
    animation: particleJitter 2.5s ease-in-out infinite;
}

.sense-visual .particle:nth-child(1) { animation-delay: 0s; }
.sense-visual .particle:nth-child(2) { animation-delay: 0.2s; }
.sense-visual .particle:nth-child(3) { animation-delay: 0.4s; }
.sense-visual .particle:nth-child(4) { animation-delay: 0.6s; }
.sense-visual .particle:nth-child(5) { animation-delay: 0.8s; }
.sense-visual .particle:nth-child(6) { animation-delay: 1s; }
.sense-visual .particle:nth-child(7) { animation-delay: 1.2s; }
.sense-visual .particle:nth-child(8) { animation-delay: 1.4s; }
.sense-visual .particle:nth-child(9) { animation-delay: 1.6s; }
.sense-visual .particle:nth-child(10) { animation-delay: 1.8s; }
.sense-visual .particle:nth-child(11) { animation-delay: 0.1s; }
.sense-visual .particle:nth-child(12) { animation-delay: 0.3s; }
.sense-visual .particle:nth-child(13) { animation-delay: 0.5s; }
.sense-visual .particle:nth-child(14) { animation-delay: 0.7s; }
.sense-visual .particle:nth-child(15) { animation-delay: 0.9s; }
.sense-visual .particle:nth-child(16) { animation-delay: 1.1s; }
.sense-visual .particle:nth-child(17) { animation-delay: 1.3s; }
.sense-visual .particle:nth-child(18) { animation-delay: 1.5s; }
.sense-visual .particle:nth-child(19) { animation-delay: 1.7s; }
.sense-visual .particle:nth-child(20) { animation-delay: 1.9s; }
.sense-visual .particle:nth-child(21) { animation-delay: 0.15s; }
.sense-visual .particle:nth-child(22) { animation-delay: 0.35s; }
.sense-visual .particle:nth-child(23) { animation-delay: 0.55s; }
.sense-visual .particle:nth-child(24) { animation-delay: 0.75s; }
.sense-visual .particle:nth-child(25) { animation-delay: 0.95s; }

@keyframes particleJitter {
    0%, 100% {
        opacity: 0.4;
        transform: translate(0, 0) scale(1);
    }
    25% {
        opacity: 0.7;
        transform: translate(0.5px, -0.5px) scale(1.1);
    }
    50% {
        opacity: 0.9;
        transform: translate(-0.5px, 0.5px) scale(1.15);
    }
    75% {
        opacity: 0.6;
        transform: translate(0.3px, -0.3px) scale(1.05);
    }
}

/* Focus Visual Animation - Scanner / Target */
.focus-visual {
    overflow: visible;
}

.focus-visual .ring {
    transform-origin: 0 0;
    animation: ringBreathe 2.5s ease-in-out infinite;
}

.focus-visual .ring1 {
    animation-delay: 0s;
}

.focus-visual .ring2 {
    animation-delay: 0.4s;
}

.focus-visual .ring3 {
    animation-delay: 0.8s;
}

.focus-visual .ring4 {
    animation-delay: 1.2s;
}

.focus-visual .scan-line {
    transform-origin: 0 0;
    animation: scanRotate 3s linear infinite;
}

.focus-visual .center-dot {
    transform-origin: 0 0;
    animation: dotPulse 1.2s ease-in-out infinite;
}

@keyframes ringBreathe {
    0%, 100% {
        opacity: 0.4;
        transform: scale(1);
    }
    50% {
        opacity: 0.9;
        transform: scale(1.08);
    }
}

@keyframes scanRotate {
    0% {
        transform: rotate(0deg);
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: rotate(360deg);
        opacity: 0.6;
    }
}

@keyframes dotPulse {
    0%, 100% {
        opacity: 0.7;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.4);
    }
}

/* System Flow Chart - Warm Organic Theme */
.system-flow-chart {
    margin: 4rem 0;
    padding: 2rem;
    background: transparent;
}

.system-flow-chart h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 3rem;
    text-align: center;
}

.system-flow-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    align-items: center;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Flow Columns */
.flow-column {
    background: #F4E6D8;
    padding: 2rem 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid #E4D3C3;
    text-align: center;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.flow-column-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flow-column-icon svg {
    width: 100%;
    height: 100%;
}

.flow-column-title {
    font-size: 1.25rem;
    color: #F28B6C;
    font-weight: 600;
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.flow-column-list {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
    text-align: left;
}

.flow-column-list li {
    color: #4B423D;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid #E4D3C3;
    position: relative;
    padding-left: 1.5rem;
}

.flow-column-list li:last-child {
    border-bottom: none;
}

.flow-column-list li::before {
    content: "•";
    color: #F28B6C;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Flow Arrows */
.flow-arrow-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    min-width: 120px;
}

.flow-arrow-line {
    width: 80px;
    height: 2px;
    background: #F28B6C;
    position: relative;
}

.flow-arrow-head {
    width: 0;
    height: 0;
    border-left: 12px solid #F28B6C;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}

.flow-arrow-label {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: #F28B6C;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
}

/* Responsive Design */
@media (max-width: 968px) {
    .system-flow-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .flow-arrow-container {
        transform: rotate(90deg);
        min-width: 60px;
        min-height: 120px;
    }
    
    .flow-arrow-line {
        width: 60px;
        height: 2px;
    }
    
    .flow-arrow-head {
        right: auto;
        top: auto;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%) rotate(90deg);
        border-left: 8px solid transparent;
        border-right: 8px solid transparent;
        border-top: 12px solid #F28B6C;
        border-bottom: none;
    }
    
    .flow-arrow-label {
        transform: rotate(-90deg);
        margin-top: 0.5rem;
    }
    
    .flow-column {
        min-height: auto;
    }
}

/* Computational Methods Diagram - 4-Step Pipeline */
.computational-methods-diagram {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    align-items: start;
    gap: 1.5rem;
    max-width: 1600px;
    margin: 2rem auto;
    padding: 2rem 0;
}

/* Method Cards */
.method-card {
    background: #FFF7F0;
    padding: 2rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(51, 43, 36, 0.08);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.method-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px rgba(51, 43, 36, 0.12);
}

.method-card-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.method-card-icon svg {
    width: 100%;
    height: 100%;
}

.method-card-title {
    font-size: 1.4rem;
    color: #F28B6C;
    font-weight: 600;
    margin-bottom: 0.4rem;
    line-height: 1.3;
}

.method-card-subtitle {
    font-size: 0.9rem;
    color: #7D6E5F;
    font-style: italic;
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.method-card-content {
    width: 100%;
}

.method-card-content p {
    font-size: 1rem;
    color: #4B423D;
    line-height: 1.7;
    margin: 0;
}

.method-card-content strong {
    color: #F28B6C;
    font-weight: 600;
}

/* Method Arrows */
.method-arrow-container {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    position: relative;
    min-width: 80px;
    padding: 2rem 1rem 0;
}

.method-arrow-line {
    width: 50px;
    height: 2px;
    background: #F28B6C;
    position: relative;
    animation: arrowPulse 2s ease-in-out infinite;
}

.method-arrow-head {
    width: 0;
    height: 0;
    border-left: 10px solid #F28B6C;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    position: relative;
    margin-left: -1px;
    animation: arrowPulse 2s ease-in-out infinite;
}

@keyframes arrowPulse {
    0%, 100% {
        opacity: 0.7;
    }
    50% {
        opacity: 1;
    }
}

/* Responsive Design for Computational Methods */
@media (max-width: 1200px) {
    .computational-methods-diagram {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .method-arrow-container {
        flex-direction: column;
        transform: rotate(90deg);
        min-width: 60px;
        min-height: 100px;
        padding: 0;
    }
    
    .method-arrow-line {
        width: 50px;
        height: 2px;
    }
    
    .method-arrow-head {
        margin-left: 0;
        margin-top: -1px;
        transform: rotate(90deg);
        border-left: 6px solid transparent;
        border-right: 6px solid transparent;
        border-top: 10px solid #F28B6C;
        border-bottom: none;
    }
}

/* Why TCM? The Logic of Layout */
.tcm-content-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 3rem;
    margin: 3rem 0;
    align-items: start;
}

.tcm-diagram-wrapper {
    position: sticky;
    top: 100px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.tcm-diagram-image {
    width: 100%;
    max-width: 350px;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 16px rgba(51, 43, 36, 0.1);
    display: block;
    object-fit: contain;
}

.tcm-reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.tcm-reason-card {
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 2px solid var(--color-primary);
    transition: var(--transition);
}

.tcm-reason-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-soft);
}

.tcm-reason-card h3 {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-weight: 600;
}

.tcm-reason-card p {
    color: var(--color-text-main);
    line-height: 1.7;
    font-size: 1rem;
}

/* Interview Insight Box */
.interview-insight-box {
    background: var(--color-card);
    padding: 3rem;
    border-radius: var(--border-radius);
    margin-top: 4rem;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.interview-insight-box h3 {
    font-size: 1.8rem;
    color: var(--color-text-main);
    margin-bottom: 2.5rem;
    font-weight: 600;
    text-align: center;
}

.insight-item {
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--color-border);
}

.insight-item:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.user-quote {
    font-size: 1.5rem;
    font-style: italic;
    color: var(--color-text-main);
    margin: 0 0 1.5rem 0;
    padding: 1.5rem 2rem;
    background: var(--color-bg-soft);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--border-radius);
    font-weight: 400;
    line-height: 1.6;
}

.insight-explanation {
    color: var(--color-text-main);
    line-height: 1.8;
    font-size: 1.05rem;
    margin: 0;
    padding-left: 0.5rem;
}

.insight-explanation strong {
    color: var(--color-primary);
    font-weight: 600;
}

.core-insight {
    margin-top: 3rem;
    padding: 2.5rem;
    background: var(--color-bg-soft);
    border-radius: var(--border-radius);
    border: 2px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.core-insight h4 {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.core-insight p {
    color: var(--color-text-main);
    line-height: 1.8;
    font-size: 1.2rem;
    margin: 0;
    font-weight: 500;
}

.core-insight strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* UI Prototype Section */
.ui-prototype-section {
    margin-top: 4rem;
}

.ui-prototype-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    align-items: stretch;
}

.ui-frame-item {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.ui-frame-image-container {
    width: 100%;
    aspect-ratio: 9/16;
    background: var(--color-bg-soft);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(51, 43, 36, 0.1);
    flex-shrink: 0;
    position: relative;
}

.ui-frame-image-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
}

/* Materials */
.materials-section {
    margin: 4rem 0;
}

.materials-section h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 2rem;
    text-align: center;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.material-item {
    background: var(--color-card);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--color-border);
}

.material-item img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1rem;
    display: block;
}

.material-item h4 {
    color: var(--color-primary);
    margin: 1rem 0 0.5rem;
}

.material-item p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Project Storyboard */
.storyboard-subtitle {
    font-size: 1.1rem;
    color: #4B423D;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

.storyboard-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 0;
    max-width: 900px;
    margin: 0 auto;
}

.storyboard-image {
    max-width: 100%;
    width: 100%;
    height: auto;
    mix-blend-mode: multiply;
    border: 2px solid #E4D3C3;
    border-radius: 16px;
    display: block;
    box-shadow: 0 4px 16px rgba(51, 43, 36, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.storyboard-image:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(51, 43, 36, 0.12);
}

/* Audience */
.audience-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

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

.audience-card h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.audience-card p {
    color: var(--color-text-main);
    line-height: 1.8;
}

.audience-card ul {
    list-style: none;
    margin-top: 1rem;
}

.audience-card li {
    color: var(--color-text-main);
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
}

.user-testing {
    margin-top: 2rem;
}

.user-testing h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 2rem;
}

.testing-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}

.testing-quote {
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-primary);
    border: 1px solid var(--color-border);
}

.testing-quote blockquote {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--color-text-main);
    margin-bottom: 1rem;
}

.quote-author {
    color: var(--color-primary);
    font-weight: 600;
}

/* Future Development Roadmap */
.roadmap-subtitle {
    font-size: 1.1rem;
    color: #4B423D;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

.roadmap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.roadmap-card {
    background: #FFFFFF;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    border-top: 4px solid #F28B6C;
    box-shadow: 0 4px 16px rgba(51, 43, 36, 0.08);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.roadmap-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(51, 43, 36, 0.12);
}

.roadmap-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.roadmap-icon svg {
    width: 100%;
    height: 100%;
}

.roadmap-card h3 {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    font-weight: 500;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.roadmap-card h4 {
    font-size: 1.5rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.roadmap-details {
    flex: 1;
}

.roadmap-details p {
    color: var(--color-text-main);
    line-height: 1.7;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.roadmap-details p:last-child {
    margin-bottom: 0;
}

.roadmap-details strong {
    color: var(--color-primary);
    font-weight: 600;
}

.roadmap-goal {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    font-style: italic;
    color: var(--color-text-muted);
}

/* Data & Materials */
.data-section {
    margin-bottom: 4rem;
}

.data-section h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 2rem;
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.data-item {
    background: var(--color-card);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.data-item h4 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.data-item p {
    color: var(--color-text-main);
    line-height: 1.6;
}

.data-item ul {
    list-style: none;
}

.data-item li {
    color: var(--color-text-main);
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

.data-visualization {
    margin: 2rem 0;
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.viz-placeholder {
    text-align: center;
    color: var(--color-text-muted);
    padding: 2rem;
}

.data-example {
    margin-top: 2rem;
}

.data-example h4 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.materials-detailed {
    margin-top: 4rem;
}

.materials-detailed h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 2rem;
}

.hardware-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.hardware-item {
    background: var(--color-card);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--color-border);
}

.hardware-item h4 {
    color: var(--color-primary);
    margin: 1rem 0 0.5rem;
}

.hardware-item p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.materials-table {
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    overflow-x: auto;
    border: 1px solid var(--color-border);
}

.materials-table h4 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.materials-table table {
    width: 100%;
    border-collapse: collapse;
}

.materials-table th {
    background: var(--color-bg-soft);
    color: var(--color-primary);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.materials-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-main);
}

.materials-table tr:hover {
    background: var(--color-bg-soft);
}

/* Bibliography */
.bibliography {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 4rem;
}

.bib-item {
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-primary);
    border: 1px solid var(--color-border);
}

.bib-item h4 {
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.bib-item p {
    color: var(--color-text-main);
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

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

.bib-note a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    margin-left: 0.5rem;
    transition: var(--transition);
}

.bib-note a:hover {
    color: var(--color-primary-soft);
    text-decoration: underline;
}

.data-sources {
    margin-top: 3rem;
}

.data-sources h3 {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 2rem;
}

.source-item {
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    border: 1px solid var(--color-border);
}

.source-item h4 {
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.source-item ul {
    list-style: none;
    margin: 1rem 0;
}

.source-item li {
    color: var(--color-text-main);
    padding: 0.5rem 0;
}

.source-note {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    font-style: italic;
}

.source-item a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

.source-item a:hover {
    color: var(--color-primary-soft);
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--color-bg-soft);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--color-text-muted);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--color-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-content-full {
        grid-column: 1;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .modes-container {
        grid-template-columns: 1fr;
    }

    .roadmap-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .roadmap-card {
        padding: 2rem;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .comparison-arrow {
        transform: rotate(90deg);
    }

    .precedents-grid {
        grid-template-columns: 1fr;
    }

    .ui-prototype-grid {
        grid-template-columns: 1fr !important;
        gap: 2rem !important;
    }

    .ui-frame-item {
        max-width: 100%;
        height: auto !important;
    }

    .ui-frame-image-container {
        aspect-ratio: 9/16 !important;
    }

    .tcm-content-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .tcm-diagram-wrapper {
        position: static;
        max-width: 100%;
        margin: 0 auto;
    }

    .tcm-diagram-image {
        max-width: 100%;
    }

    .tcm-reasons-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .interview-insight-box {
        padding: 2rem;
    }

    .interview-insight-box h3 {
        font-size: 1.5rem;
        margin-bottom: 2rem;
    }

    .insight-item {
        margin-bottom: 2rem;
        padding-bottom: 2rem;
    }

    .user-quote {
        font-size: 1.3rem;
        padding: 1.25rem 1.5rem;
    }

    .insight-explanation {
        font-size: 1rem;
    }

    .core-insight {
        padding: 2rem;
    }

    .core-insight p {
        font-size: 1.1rem;
    }

    .testing-content {
        grid-template-columns: 1fr;
    }

    .flow-diagram {
        flex-direction: column;
    }

    .flow-arrow-large {
        transform: rotate(90deg);
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hypothesis-text {
        font-size: 1.25rem;
    }

    .image-grid {
        grid-template-columns: 1fr;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}