:root {
    --color-bg: #F7F1E6;
    --color-text: #241A14;
    --color-text-light: #6B5C4F;
    --color-accent: #8A5A3B;
    --color-accent-hover: #714A30;
    --color-border: rgba(44, 32, 25, 0.1);
    --color-white: #FCF8F0;

    --color-sky: #A9C6DC;
    --color-sky-deep: #5D87A3;

    --glass-surface: rgba(252, 248, 240, 0.7);
    --glass-surface-strong: rgba(252, 248, 240, 0.88);
    --glass-border: rgba(44, 32, 25, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.6);
    --glass-shadow: rgba(44, 32, 25, 0.12);
    --glass-blur: blur(18px) saturate(160%);
    --glass-blur-soft: blur(14px) saturate(150%);

    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 10px;
    --radius-pill: 999px;

    --font-display: 'Bricolage Grotesque', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    font-size: 1.05rem;
    position: relative;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Ambient background — soft light sources for the glass to catch */
.ambient {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.ambient-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.5;
}

.ambient-blob--amber {
    width: 560px;
    height: 560px;
    top: -180px;
    right: -120px;
    background: radial-gradient(circle at 30% 30%, #E4D3B6, transparent 70%);
}

.ambient-blob--rose {
    width: 480px;
    height: 480px;
    top: 55%;
    left: -220px;
    background: radial-gradient(circle at 50% 50%, #A9C6DC, transparent 70%);
    opacity: 0.6;
}

.ambient-blob--sand {
    width: 620px;
    height: 620px;
    bottom: -280px;
    right: -160px;
    background: radial-gradient(circle at 50% 50%, #FCF8F0, transparent 70%);
}

@media (prefers-reduced-motion: no-preference) {
    .ambient-blob {
        animation: drift 26s ease-in-out infinite alternate;
    }
    .ambient-blob--rose { animation-duration: 32s; }
    .ambient-blob--sand { animation-duration: 38s; }
}

@keyframes drift {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(30px, -20px) scale(1.06); }
}

/* Navigation — floating glass pill, matches the main portfolio nav */
.portfolio-nav {
    position: fixed;
    top: 1.25rem;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: center;
    padding: 0 1.5rem;
    animation: slideDown 0.6s ease-out;
}

@keyframes slideDown {
    from { transform: translateY(-140%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.portfolio-nav .nav-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 0.85rem 1.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: var(--radius-pill);
    background: var(--glass-surface);
    -webkit-backdrop-filter: var(--glass-blur-soft);
    backdrop-filter: var(--glass-blur-soft);
    border: 1px solid var(--glass-border);
    box-shadow: 0 1px 0 0 var(--glass-highlight) inset, 0 8px 24px var(--glass-shadow);
    transition: var(--transition);
}

.portfolio-nav.is-scrolled .nav-container {
    background: var(--glass-surface-strong);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    box-shadow: 0 1px 0 0 var(--glass-highlight) inset, 0 10px 30px var(--glass-shadow);
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 400;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: var(--transition);
}

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

.nav-link-back {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.nav-link-back svg { color: var(--color-sky-deep); transition: transform 0.3s var(--transition); }
.nav-link-back:hover svg { transform: translateX(-3px); }
.nav-link-back::after { display: none; }

/* Hero */
.hero {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 10rem 2rem 6rem;
}

.hero-content {
    max-width: 800px;
    text-align: center;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-light);
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.hero-byline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    font-size: 0.88rem;
    color: var(--color-text-light);
    margin-bottom: 2.5rem;
}
.hero-byline-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--color-text-light);
    opacity: 0.55;
}

.hero-stats {
    padding: 2rem;
    margin-top: 2rem;
    border-radius: var(--radius-lg);
    background: var(--glass-surface);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: 0 1px 0 0 var(--glass-highlight) inset, 0 8px 30px var(--glass-shadow);
}

.big-stat {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 0.75rem;
}

.stat-description {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

section {
    padding: 6rem 2rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    margin-bottom: 3rem;
    color: var(--color-text);
}

h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: 2rem;
    margin-top: 3rem;
}

h3 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1.25rem;
    margin-top: 2rem;
}

h4 {
    font-family: var(--font-body);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
    margin-top: 1.5rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

strong {
    font-weight: 600;
    color: var(--color-text);
}

em {
    font-style: italic;
    color: var(--color-text);
}

.citation {
    position: relative;
    top: -0.5em;
    font-size: 0.7em;
    color: var(--color-accent);
    font-weight: 600;
    cursor: help;
    text-decoration: none;
    padding: 0 0.15em;
}

.citation:hover {
    color: var(--color-accent-hover);
}

.chart-placeholder {
    border-radius: var(--radius-md);
    padding: 3rem 2rem;
    margin: 2.5rem 0;
    text-align: center;
    background: var(--glass-surface);
    -webkit-backdrop-filter: var(--glass-blur-soft);
    backdrop-filter: var(--glass-blur-soft);
    border: 1px solid var(--glass-border);
}

.chart-placeholder .icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    opacity: 0.4;
}

.chart-placeholder h4 {
    color: var(--color-accent);
    margin-bottom: 0.75rem;
    font-family: var(--font-display);
    font-size: 1.5rem;
}

.chart-placeholder p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 0;
}

.tableau-viz {
    margin: 3rem 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--glass-surface);
    -webkit-backdrop-filter: var(--glass-blur-soft);
    backdrop-filter: var(--glass-blur-soft);
    border: 1px solid var(--glass-border);
    box-shadow: 0 1px 0 0 var(--glass-highlight) inset, 0 8px 30px var(--glass-shadow);
}

.tableau-viz:has(> :not(.chart-placeholder)) .chart-placeholder {
    display: none;
}

.tableau-viz iframe {
    width: 100%;
    border: none;
}

.callout {
    background: rgba(255, 255, 255, 0.4);
    -webkit-backdrop-filter: var(--glass-blur-soft);
    backdrop-filter: var(--glass-blur-soft);
    border: 1px solid var(--glass-border);
    border-left: 3px solid var(--color-accent);
    padding: 1.75rem;
    margin: 2rem 0;
    border-radius: var(--radius-sm);
}

.callout.warning {
    border-left-color: #c2885b;
}

.callout.info {
    border-left-color: #7a9c9e;
}

.callout h4 {
    margin-top: 0;
    color: var(--color-text);
}

.callout p {
    margin-bottom: 0;
}

.callout p:not(:last-child) {
    margin-bottom: 1rem;
}

.formula-block {
    text-align: center;
    font-family: 'SF Mono', 'JetBrains Mono', Menlo, Consolas, monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-sm);
    margin: 1.75rem 0;
}

.recommendation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.recommendation-card {
    padding: 2.5rem;
    transition: var(--transition);
    border-radius: var(--radius-lg);
    background: var(--glass-surface);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: 0 1px 0 0 var(--glass-highlight) inset, 0 8px 30px var(--glass-shadow);
}

.recommendation-card:hover {
    transform: translateY(-6px);
    background: var(--glass-surface-strong);
    box-shadow: 0 1px 0 0 var(--glass-highlight) inset, 0 20px 45px var(--glass-shadow);
}

.recommendation-card h4 {
    color: var(--color-accent);
    margin-top: 0;
    font-family: var(--font-display);
    font-size: 1.5rem;
}

.recommendation-card p {
    color: var(--color-text-light);
    line-height: 1.7;
}

ul, ol {
    margin-left: 1.75rem;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.75rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

.collapsible-section {
    margin: 3rem 0;
}

.collapsible-toggle {
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    width: 100%;
    text-align: left;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-accent);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    background: var(--glass-surface);
    -webkit-backdrop-filter: var(--glass-blur-soft);
    backdrop-filter: var(--glass-blur-soft);
    border: 1px solid var(--glass-border);
    box-shadow: 0 1px 0 0 var(--glass-highlight) inset;
}

.collapsible-toggle:hover {
    background: var(--glass-surface-strong);
}

.collapsible-toggle::after {
    content: '▼';
    font-size: 0.9rem;
    transition: transform 0.3s;
    font-family: var(--font-body);
}

.collapsible-toggle.active {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.collapsible-toggle.active::after {
    transform: rotate(180deg);
}

.collapsible-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.collapsible-content.active {
    max-height: 6000px;
    transition: max-height 0.5s ease-in;
}

.collapsible-inner {
    padding: 2.5rem 2rem;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    background: var(--glass-surface);
    -webkit-backdrop-filter: var(--glass-blur-soft);
    backdrop-filter: var(--glass-blur-soft);
    border: 1px solid var(--glass-border);
    border-top: none;
}

.sources-list {
    margin-left: 0;
    list-style: none;
}

.sources-list li {
    margin-bottom: 2rem;
    padding-left: 2.75rem;
    position: relative;
}

.sources-list li::before {
    content: attr(data-number);
    position: absolute;
    left: 0;
    top: 0;
    font-weight: 600;
    color: var(--color-accent);
    font-family: var(--font-display);
    font-size: 1.1rem;
}

.sources-list a {
    color: var(--color-accent);
    text-decoration: none;
    word-wrap: break-word;
    transition: var(--transition);
}

.sources-list a:hover {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

footer {
    background-color: transparent;
    color: var(--color-text-light);
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

footer p {
    color: var(--color-text-light);
    margin-bottom: 0.75rem;
}

footer a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

footer a:hover {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

@media (max-width: 768px) {
    body {
        font-size: 1rem;
    }

    .portfolio-nav {
        top: 0.75rem;
        padding: 0 1rem;
    }

    .portfolio-nav .nav-container {
        padding: 0.7rem 1.25rem;
    }

    .nav-links {
        gap: 1.25rem;
    }

    .nav-link {
        font-size: 0.8rem;
    }

    .hero {
        padding: 8.5rem 1.5rem 4rem;
        min-height: 60vh;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .big-stat {
        font-size: 2.25rem;
    }

    section {
        padding: 4rem 1.5rem;
    }

    .container {
        padding: 0 1.5rem;
    }

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

    h2 {
        font-size: 2rem;
    }

    h3 {
        font-size: 1.5rem;
    }

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

    .recommendation-card {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .portfolio-nav .nav-container {
        flex-direction: column;
        gap: 0.6rem;
        padding: 0.85rem 1rem;
    }

    .nav-logo {
        font-size: 1.1rem;
    }

    .nav-links {
        gap: 0.75rem 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-link {
        font-size: 0.82rem;
    }

    .hero {
        padding: 9.75rem 1rem 3rem;
    }

    .hero-title {
        font-size: 1.85rem;
    }

    .big-stat {
        font-size: 2rem;
    }
}

.exec-summary {
    padding: 4rem 2rem;
}

.exec-summary-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 3.5rem;
    border-radius: var(--radius-lg);
    background: var(--glass-surface);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: 0 1px 0 0 var(--glass-highlight) inset, 0 8px 30px var(--glass-shadow);
}

.exec-header {
    text-align: center;
    margin-bottom: 3rem;
}

.exec-label {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 0.6rem;
}

.exec-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 0.75rem 0;
    line-height: 1.3;
}

.exec-subtitle {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.exec-findings-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 3rem;
}

.exec-finding {
    padding: 2.25rem 1.75rem;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--glass-border);
}

.exec-stat {
    font-family: var(--font-display);
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.exec-stat-label {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.exec-stat-desc {
    font-family: var(--font-body);
    font-size: 0.82rem;
    color: var(--color-text-light);
    line-height: 1.55;
    margin-bottom: 0;
}

.exec-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.exec-detail-label {
    font-family: var(--font-body);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.exec-detail-text {
    font-family: var(--font-body);
    font-size: 0.92rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 0;
}

.exec-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.exec-tag {
    font-family: var(--font-body);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-text-light);
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid var(--glass-border);
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-pill);
}

.exec-detail-context {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 0;
    font-style: italic;
}

.exec-cta {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.exec-cta-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-accent);
    text-decoration: none;
    letter-spacing: 0.03em;
    transition: var(--transition);
}
.exec-cta-link svg { transition: transform 0.3s var(--transition); }
.exec-cta-link:hover svg { transform: translateY(2px); }

.exec-cta-link:hover {
    color: var(--color-accent-hover);
}

@media (max-width: 768px) {
    .exec-summary-inner {
        padding: 2.5rem 1.5rem;
    }

    .exec-findings-grid {
        grid-template-columns: 1fr;
    }

    .exec-details-grid {
        grid-template-columns: 1fr;
    }

    .exec-stat {
        font-size: 2rem;
    }
}

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