/* ===============================================
   COMPREHENSIVE UI/UX FIXES & ENHANCEMENTS
   Senior Front-End Developer Implementation
   =============================================== */

/* 0) GLOBAL CSS RULE: HEADINGS NEVER SMALLER THAN BODY TEXT */
:root {
    --body-size: 16px;
    --body-line-height: 1.7;
}

body {
    font-size: var(--body-size);
    line-height: var(--body-line-height);
}

/* Enforce minimum heading sizes relative to body */
h5 {
    font-size: max(1rem, var(--body-size)) !important;
    font-weight: 600 !important;
    letter-spacing: 0.3px;
    color: var(--accent-color, #6B8E4E);
    margin-bottom: 12px;
}

h4 {
    font-size: max(1.05rem, calc(var(--body-size) * 1.05)) !important;
    font-weight: 600 !important;
    letter-spacing: 0.4px;
    color: var(--color-navy-light, #3D5563);
    margin-bottom: 16px;
}

h3 {
    font-size: max(1.2rem, calc(var(--body-size) * 1.2)) !important;
    font-weight: 650 !important;
    letter-spacing: 0.5px;
    color: var(--color-navy, #2C4251);
    margin-bottom: 20px;
}

h2 {
    font-size: max(1.6rem, calc(var(--body-size) * 1.6)) !important;
    font-weight: 700 !important;
    letter-spacing: 0.6px;
    color: var(--color-navy, #2C4251);
    margin-bottom: 24px;
}

/* 1) STICKY TABLE OF CONTENTS - DESKTOP LAYOUT */
.case-study-layout {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 48px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
}

.case-content-main {
    min-width: 0; /* Prevent grid blowout */
}

.case-toc-sidebar {
    position: sticky;
    top: 110px;
    align-self: start;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    background: rgba(250, 248, 245, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(107, 142, 78, 0.15);
    border-radius: 12px;
    padding: 24px 20px;
    box-shadow: 0 2px 12px rgba(44, 66, 81, 0.06);
}

.case-toc-title {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--color-navy-light, #3D5563);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(107, 142, 78, 0.2);
}

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

.case-toc-item {
    margin-bottom: 8px;
}

.case-toc-link {
    display: block;
    padding: 10px 12px;
    font-size: 0.9rem;
    color: var(--color-navy-light, #3D5563);
    text-decoration: none;
    border-left: 3px solid transparent;
    border-radius: 4px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.case-toc-link:hover {
    background: rgba(107, 142, 78, 0.08);
    color: var(--accent-color, #6B8E4E);
    border-left-color: var(--accent-color, #6B8E4E);
    padding-left: 16px;
}

.case-toc-link.active {
    background: rgba(107, 142, 78, 0.12);
    color: var(--accent-color, #6B8E4E);
    border-left-color: var(--accent-color, #6B8E4E);
    font-weight: 600;
    padding-left: 16px;
}

/* Mobile TOC: Convert to dropdown */
@media (max-width: 1023px) {
    .case-study-layout {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .case-toc-sidebar {
        position: relative;
        top: 0;
        max-height: none;
        margin-bottom: 24px;
    }
    
    .case-toc-sidebar.collapsed .case-toc-list {
        display: none;
    }
    
    .case-toc-title {
        cursor: pointer;
        user-select: none;
    }
    
    .case-toc-title::after {
        content: '▼';
        float: right;
        transition: transform 0.25s;
    }
    
    .case-toc-sidebar:not(.collapsed) .case-toc-title::after {
        transform: rotate(180deg);
    }
}

/* 2) GLOBAL UNIFORM TILE SYSTEM */
.impact-grid,
.kpi-grid,
.metric-tiles,
.results-grid {
    display: grid;
    gap: 20px;
    margin: 32px 0;
}

/* 3-tile layouts */
.impact-grid.tiles-3,
.kpi-grid.tiles-3,
.metric-tiles.tiles-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* 4-tile layouts */
.impact-grid.tiles-4,
.kpi-grid.tiles-4,
.metric-tiles.tiles-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* 5-tile layouts */
.impact-grid.tiles-5,
.kpi-grid.tiles-5 {
    grid-template-columns: repeat(5, 1fr);
}

/* 6-tile layouts */
.impact-grid.tiles-6,
.kpi-grid.tiles-6 {
    grid-template-columns: repeat(6, 1fr);
}

/* Universal tile styling */
.impact-card,
.kpi-card,
.metric-tile,
.result-tile {
    background: white;
    border-radius: 12px;
    padding: 24px 20px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(44, 66, 81, 0.06);
    border-top: 3px solid var(--accent-color, #6B8E4E);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 140px;
    height: 100%;
}

.impact-card:hover,
.kpi-card:hover,
.metric-tile:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(44, 66, 81, 0.12);
}

.impact-number,
.kpi-value,
.metric-value {
    font-size: 2.25rem;
    font-weight: 700;
    font-family: var(--font-mono, 'Space Grotesk', monospace);
    color: var(--accent-color, #6B8E4E);
    margin-bottom: 8px;
    line-height: 1;
}

.impact-label,
.kpi-label,
.metric-label {
    font-size: 0.875rem;
    color: var(--color-navy-light, #3D5563);
    font-weight: 500;
    line-height: 1.4;
    margin: 0;
}

.kpi-icon {
    font-size: 1.5rem;
    color: var(--accent-color, #6B8E4E);
    margin-bottom: 12px;
    opacity: 0.8;
}

/* Tablet: 2 columns */
@media (max-width: 1024px) and (min-width: 769px) {
    .impact-grid,
    .kpi-grid,
    .metric-tiles {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

/* Mobile: 1 column */
@media (max-width: 768px) {
    .impact-grid,
    .kpi-grid,
    .metric-tiles,
    .results-grid {
        grid-template-columns: 1fr !important;
    }
}

/* 3B) ARCHITECTURE VISUALIZATION SYSTEM */
.architecture-diagram {
    margin: 48px 0;
    padding: 40px;
    background: linear-gradient(135deg, rgba(250, 248, 245, 0.9), rgba(245, 241, 237, 0.9));
    border-radius: 16px;
    border: 2px solid rgba(107, 142, 78, 0.15);
}

.architecture-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    margin: 32px 0;
}

.architecture-accounts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 500px;
}

.account-box {
    background: white;
    border: 2px solid var(--accent-border, rgba(107, 142, 78, 0.3));
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(44, 66, 81, 0.08);
    transition: all 0.3s ease;
}

.account-box:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(44, 66, 81, 0.15);
    border-color: var(--accent-color, #6B8E4E);
}

.account-number {
    display: inline-block;
    background: var(--accent-color, #6B8E4E);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    text-align: center;
    line-height: 32px;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.account-kpi {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-navy, #2C4251);
    margin-bottom: 8px;
}

.account-desc {
    font-size: 0.85rem;
    color: var(--color-navy-light, #3D5563);
    line-height: 1.5;
    margin: 4px 0;
}

.flow-connector {
    font-size: 3rem;
    color: var(--accent-color, #6B8E4E);
    font-weight: 300;
    line-height: 1;
}

.macro-system-box {
    background: linear-gradient(135deg, var(--accent-color, #6B8E4E), var(--color-olive-dark, #5A7841));
    color: white;
    border-radius: 16px;
    padding: 32px 28px;
    box-shadow: 0 8px 32px rgba(107, 142, 78, 0.3);
    min-width: 320px;
    max-width: 380px;
    text-align: center;
}

.macro-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: white;
}

.macro-desc {
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 8px 0;
    opacity: 0.95;
}

/* Mobile: Stack vertically */
@media (max-width: 768px) {
    .architecture-flow {
        flex-direction: column;
    }
    
    .architecture-accounts {
        grid-template-columns: 1fr;
    }
    
    .flow-connector {
        transform: rotate(90deg);
    }
}

/* 4A & 5A) FRAMEWORK/PILLAR VISUALIZATIONS */
.framework-visualization,
.pillar-system {
    margin: 40px 0;
    padding: 32px;
    background: white;
    border-radius: 16px;
    border: 2px solid rgba(107, 142, 78, 0.15);
    box-shadow: 0 4px 16px rgba(44, 66, 81, 0.08);
}

.framework-title,
.pillar-title {
    text-align: center;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-navy, #2C4251);
    margin-bottom: 32px;
}

.quadrant-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
    background: var(--accent-border, rgba(107, 142, 78, 0.3));
    border-radius: 8px;
    overflow: hidden;
}

.quadrant {
    background: white;
    padding: 24px;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.quadrant-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent-color, #6B8E4E);
    margin-bottom: 12px;
}

.quadrant-content {
    font-size: 0.95rem;
    color: var(--color-navy-light, #3D5563);
    line-height: 1.6;
}

.three-pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 24px;
}

.pillar-card {
    background: linear-gradient(to bottom, white, rgba(250, 248, 245, 0.6));
    border: 2px solid rgba(107, 142, 78, 0.2);
    border-radius: 12px;
    padding: 28px 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.pillar-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px rgba(44, 66, 81, 0.15);
    border-color: var(--accent-color, #6B8E4E);
}

.pillar-icon {
    font-size: 2.5rem;
    color: var(--accent-color, #6B8E4E);
    margin-bottom: 16px;
}

.pillar-heading {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-navy, #2C4251);
    margin-bottom: 16px;
}

.pillar-points {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
}

.pillar-points li {
    font-size: 0.9rem;
    color: var(--color-navy-light, #3D5563);
    line-height: 1.6;
    margin-bottom: 8px;
    padding-left: 24px;
    position: relative;
}

.pillar-points li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color, #6B8E4E);
    font-weight: 700;
}

@media (max-width: 768px) {
    .quadrant-grid {
        grid-template-columns: 1fr;
    }
    
    .three-pillars {
        grid-template-columns: 1fr;
    }
}

/* 6B) ATTRIBUTION SYSTEM PIPELINE VISUALIZATION */
.attribution-pipeline {
    margin: 48px 0;
    padding: 40px 32px;
    background: linear-gradient(to right, rgba(250, 248, 245, 0.5), rgba(245, 241, 237, 0.8));
    border-radius: 16px;
    border: 2px solid rgba(107, 142, 78, 0.15);
    overflow-x: auto;
}

.pipeline-flow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    min-width: 1000px;
}

.pipeline-stage {
    flex: 1;
    background: white;
    border: 2px solid rgba(107, 142, 78, 0.25);
    border-radius: 12px;
    padding: 24px 20px;
    box-shadow: 0 4px 12px rgba(44, 66, 81, 0.08);
    transition: all 0.3s ease;
}

.pipeline-stage:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(44, 66, 81, 0.15);
    border-color: var(--accent-color, #6B8E4E);
}

.pipeline-stage-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--accent-color, #6B8E4E);
    margin-bottom: 16px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.pipeline-items li {
    font-size: 0.85rem;
    color: var(--color-navy-light, #3D5563);
    line-height: 1.6;
    margin-bottom: 8px;
    padding-left: 18px;
    position: relative;
}

.pipeline-items li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-color, #6B8E4E);
    font-weight: 700;
    font-size: 1.2rem;
    line-height: 1;
}

.pipeline-arrow {
    font-size: 2rem;
    color: var(--accent-color, #6B8E4E);
    font-weight: 300;
    flex-shrink: 0;
}

@media (max-width: 1024px) {
    .attribution-pipeline {
        overflow-x: scroll;
        -webkit-overflow-scrolling: touch;
    }
}

/* 7B) HUB-AND-SPOKE VISUALIZATION */
.hub-spoke-diagram {
    margin: 48px 0;
    padding: 48px 32px;
    background: linear-gradient(135deg, rgba(250, 248, 245, 0.9), rgba(245, 241, 237, 0.9));
    border-radius: 16px;
    border: 2px solid rgba(107, 142, 78, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.central-hub {
    background: linear-gradient(135deg, var(--accent-color, #6B8E4E), var(--color-olive-dark, #5A7841));
    color: white;
    border-radius: 50%;
    width: 220px;
    height: 220px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    box-shadow: 0 12px 40px rgba(107, 142, 78, 0.4);
    text-align: center;
    position: relative;
    z-index: 2;
}

.hub-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.hub-subtitle {
    font-size: 0.85rem;
    opacity: 0.9;
}

.spokes-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 800px;
}

.spoke-box {
    background: white;
    border: 2px solid var(--accent-border, rgba(107, 142, 78, 0.3));
    border-radius: 12px;
    padding: 24px 20px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(44, 66, 81, 0.08);
    transition: all 0.3s ease;
    position: relative;
}

.spoke-box::before {
    content: '';
    position: absolute;
    width: 40px;
    height: 2px;
    background: var(--accent-color, #6B8E4E);
    top: 50%;
    left: -40px;
}

.spoke-box:hover {
    transform: translateX(8px);
    box-shadow: 0 8px 24px rgba(44, 66, 81, 0.15);
    border-color: var(--accent-color, #6B8E4E);
}

.spoke-number {
    display: inline-block;
    background: var(--accent-color, #6B8E4E);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    text-align: center;
    line-height: 32px;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.spoke-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-navy, #2C4251);
    margin-bottom: 8px;
}

.spoke-desc {
    font-size: 0.85rem;
    color: var(--color-navy-light, #3D5563);
    line-height: 1.5;
}

@media (max-width: 768px) {
    .hub-spoke-diagram {
        flex-direction: column;
    }
    
    .spokes-container {
        grid-template-columns: 1fr;
    }
    
    .spoke-box::before {
        display: none;
    }
}

/* CHART CONTAINERS */
.chart-container {
    background: white;
    border-radius: 12px;
    padding: 32px 24px;
    margin: 32px 0;
    box-shadow: 0 4px 12px rgba(44, 66, 81, 0.08);
    border: 1px solid rgba(107, 142, 78, 0.1);
}

.chart-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-navy, #2C4251);
    margin-bottom: 24px;
    text-align: center;
}

.split-charts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin: 32px 0;
}

@media (max-width: 968px) {
    .split-charts {
        grid-template-columns: 1fr;
    }
}

/* 8) RECOGNITION SECTION ENHANCEMENTS */
.logo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    align-items: center;
    justify-items: center;
    margin: 32px 0;
}

.partner-logo-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
    transition: all 0.3s ease;
}

.partner-logo-item:hover {
    transform: translateY(-4px);
}

.partner-logo-item img {
    max-height: 60px;
    width: auto;
    filter: grayscale(100%);
    transition: filter 0.3s ease;
}

.partner-logo-item:hover img {
    filter: grayscale(0%);
}

.publication-cta-card {
    background: linear-gradient(135deg, rgba(107, 142, 78, 0.1), rgba(224, 120, 86, 0.1));
    border: 2px solid var(--accent-color, #6B8E4E);
    border-radius: 12px;
    padding: 32px;
    margin: 32px 0;
    text-align: center;
    box-shadow: 0 8px 24px rgba(44, 66, 81, 0.12);
}

.publication-cta-card .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--accent-color, #6B8E4E);
    color: white;
    padding: 16px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.05rem;
    box-shadow: 0 4px 16px rgba(107, 142, 78, 0.3);
    transition: all 0.3s ease;
    margin-top: 16px;
}

.publication-cta-card .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(107, 142, 78, 0.4);
    background: var(--color-olive-dark, #5A7841);
}

/* Utility: Section anchors for TOC */
.toc-anchor {
    scroll-margin-top: 120px;
    padding-top: 24px;
}