/* ============================================
   Engineering Trust & Leading Clients
   Warm Navy Theme — styles.css
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ---------- Custom Properties ---------- */
:root {
    /* Core palette */
    --amber: #e3a463;
    --peach: #e5bc9c;
    --navy: #27445c;
    --steel: #537c9b;
    --ice: #b3c3d3;
    --slate: #455666;

    /* Derived / semantic */
    --bg-primary: #1d3548;
    --bg-secondary: #27445c;
    --bg-elevated: #455666;
    --bg-surface: #537c9b;
    --text-primary: #f5f0eb;
    --text-secondary: #b3c3d3;
    --text-muted: #7a95a8;
    --accent-primary: #e3a463;
    --accent-light: #e5bc9c;

    /* Borders / separators */
    --border-warm: rgba(227, 164, 99, 0.15);
    --border-neutral: rgba(179, 195, 211, 0.1);
}

/* ---------- Reset ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---------- Slideshow Container ---------- */
.slideshow {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

/* ---------- Individual Slide ---------- */
.slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 3rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease-in-out;
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.slide.active .slide-content {
    animation: slideIn 0.5s ease-out;
}

/* ---------- Slide Content ---------- */
.slide-content {
    max-width: 800px;
    width: 100%;
    text-align: center;
}

.slide-content.left-aligned {
    text-align: left;
}

/* ---------- Per-Arc Gradient Backgrounds ---------- */
.slide[data-arc="intro"] {
    background: linear-gradient(135deg, #1d3548 0%, #27445c 100%);
}
.slide[data-arc="1"] {
    background: linear-gradient(135deg, #27445c 0%, #2a4f6a 100%);
}
.slide[data-arc="2"] {
    background: linear-gradient(135deg, #27445c 0%, #3a4a50 100%);
}
.slide[data-arc="3"] {
    background: linear-gradient(135deg, #27445c 0%, #2d4a56 100%);
}
.slide[data-arc="4"] {
    background: linear-gradient(135deg, #1d3548 0%, #2a3f4e 100%);
}

/* ============================================
   SLIDE TYPE CLASSES
   ============================================ */

/* ---------- 1. Title Slide ---------- */
.slide.title-slide {
    background: linear-gradient(135deg, #1d3548 0%, #27445c 100%);
}

.slide.title-slide h1 {
    color: var(--text-primary);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.slide.title-slide p {
    color: var(--accent-light);
    font-size: clamp(1rem, 3vw, 1.5rem);
}

.speaker-info h1 {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
}

.speaker-headshot {
    max-width: 200px;
    height: auto;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border: 2px solid var(--navy);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.slide.title-slide .divider {
    width: 100%;
    height: 2px;
    background: var(--accent-primary);
    margin: 1rem auto;
}

/* ---------- 2. Bullet Slide ---------- */
.slide.bullet-slide .slide-content {
    text-align: left;
}

.slide.bullet-slide h1 {
    color: var(--text-primary);
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.slide.bullet-slide ul {
    list-style: none;
    padding: 0;
}

.slide.bullet-slide li {
    color: var(--text-secondary);
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    line-height: 1.8;
    margin-bottom: 0.75rem;
    padding-left: 2rem;
    position: relative;
}

.slide.bullet-slide li::before {
    content: "\25CF";
    color: var(--accent-primary);
    position: absolute;
    left: 0;
    font-size: 0.75em;
}

.slide.bullet-slide li ul {
    list-style: none;
    padding: 0;
    margin-top: 0.75rem;
    margin-left: 0.5rem;
}

.slide.bullet-slide li ul li {
    font-size: clamp(0.9rem, 2.2vw, 1.1rem);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
}

.slide.bullet-slide li ul li::before {
    content: "\25CB";
    font-size: 0.65em;
}

/* ---------- 3. Lettered Slide ---------- */
.slide.lettered-slide .slide-content {
    text-align: left;
}

.slide.lettered-slide h1 {
    color: var(--text-primary);
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.slide.lettered-slide ul {
    list-style: none;
    padding: 0;
}

.slide.lettered-slide li {
    color: var(--text-secondary);
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    line-height: 1.7;
    margin-bottom: 1.25rem;
    padding-left: 0;
}

.takeaway-label {
    display: inline-block;
    color: var(--accent-primary);
    font-size: 0.75em;
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: 0.2rem;
}

.slide.lettered-slide li strong {
    color: var(--accent-primary);
    font-weight: 600;
}

/* ---------- 4. Arc Intro Slide ---------- */
.slide.arc-intro-slide .slide-content {
    text-align: center;
}

.arc-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(29, 53, 72, 0.82);
    z-index: 0;
}

.arc-bg-overlay + .slide-content {
    position: relative;
    z-index: 1;
}

.arc-label {
    color: #a8c76a;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.arc-label-section {
    font-weight: 400;
    letter-spacing: 0.08em;
    opacity: 0.85;
}

.arc-title {
    color: var(--text-primary);
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.arc-divider {
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-light));
    margin: 1.5rem auto 0;
}

/* ---------- 5. Subtitle + Bullet Slide ---------- */
.slide.subtitle-bullet-slide .slide-content {
    text-align: left;
}

.slide.subtitle-bullet-slide h1 {
    color: var(--text-primary);
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
}

.slide.subtitle-bullet-slide .subtitle {
    color: var(--accent-light);
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    margin-bottom: 2rem;
}

.slide.subtitle-bullet-slide ul {
    list-style: none;
    padding: 0;
}

.slide.subtitle-bullet-slide li {
    color: var(--text-secondary);
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    line-height: 1.8;
    margin-bottom: 0.75rem;
    padding-left: 2rem;
    position: relative;
}

.slide.subtitle-bullet-slide li::before {
    content: "\25CF";
    color: var(--accent-primary);
    position: absolute;
    left: 0;
    font-size: 0.75em;
}

.slide.subtitle-bullet-slide li ul {
    list-style: none;
    padding: 0;
    margin-top: 0.5rem;
    margin-left: 0.5rem;
}

.slide.subtitle-bullet-slide li ul li {
    font-size: clamp(0.9rem, 2.2vw, 1.1rem);
    margin-bottom: 0.4rem;
    padding-left: 1.5rem;
}

.slide.subtitle-bullet-slide li ul li::before {
    content: "\25CB";
    font-size: 0.65em;
}

/* ---------- 6. Quote Slide ---------- */
.slide.quote-slide .slide-content {
    text-align: left;
}

.slide.quote-slide h1 {
    color: var(--text-primary);
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
}

.quote-block {
    background: var(--bg-elevated);
    border-left: 3px solid var(--accent-primary);
    border-radius: 0 8px 8px 0;
    padding: 1.5rem 2rem;
    margin: 1rem 0;
    text-align: left;
}

.quote-block p {
    color: var(--text-primary);
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    line-height: 1.7;
    font-style: italic;
}

.quote-block .annotation {
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-style: normal;
    margin-top: 0.75rem;
}

/* Quote with Portrait */
.quote-with-portrait {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.portrait-frame {
    flex: 0 0 auto;
}

.portrait-frame img {
    width: 240px;
    height: 280px;
    border-radius: 16px;
    object-fit: cover;
    border: 3px solid var(--accent-primary);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.quote-with-portrait .quote-block {
    flex: 1;
}

/* ---------- 7. Flow Slide ---------- */
.slide.flow-slide .slide-content {
    text-align: center;
}

.slide.flow-slide h1 {
    color: var(--text-primary);
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 2rem;
}

.flow-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.flow-item {
    text-align: center;
    margin-bottom: 0.5rem;
}

.flow-item .step-label {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: clamp(0.9rem, 2vw, 1.1rem);
}

.flow-item .step-desc {
    color: var(--text-secondary);
    font-size: clamp(0.85rem, 2vw, 1rem);
}

.flow-arrow {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.25rem;
    margin: 0.25rem 0;
}

.flow-result {
    color: var(--accent-light);
    font-size: clamp(0.9rem, 2vw, 1rem);
    font-weight: 500;
    margin-top: 1.5rem;
}

/* ---------- 8. Visual Slide ---------- */
.slide.visual-slide {
    background: var(--bg-primary);
}

.slide.visual-slide .slide-content {
    text-align: center;
}

.visual-slide img {
    max-width: 60%;
    max-height: 50vh;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-warm);
    object-fit: cover;
}

.visual-slide .visual-caption {
    color: var(--text-muted);
    font-size: clamp(0.875rem, 2vw, 1rem);
    margin-top: 1.25rem;
}

.visual-slide h1 {
    color: var(--text-primary);
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

/* Image placeholder for missing stock photos */
.image-placeholder {
    width: 60%;
    max-width: 500px;
    aspect-ratio: 16 / 9;
    background: var(--bg-elevated);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    border: 1px solid var(--border-warm);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.image-placeholder span {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ---------- 9. Columns Slide ---------- */
.slide.columns-slide .slide-content {
    text-align: left;
    max-width: 900px;
}

.slide.columns-slide h1 {
    color: var(--text-primary);
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 2rem;
    text-align: center;
}

.columns-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.columns-grid.two-col {
    grid-template-columns: repeat(2, 1fr);
}

.column-card {
    background: var(--bg-elevated);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    border-top: 2px solid var(--accent-primary);
    display: flex;
    flex-direction: column;
}

.column-card ul + .column-note {
    margin-top: auto;
}

.column-card h3 {
    color: var(--accent-primary);
    font-size: clamp(1.1rem, 2.5vw, 1.35rem);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.column-card p {
    color: var(--text-secondary);
    font-size: clamp(1rem, 2.2vw, 1.15rem);
    line-height: 1.7;
    margin-bottom: 0.5rem;
}

.column-note {
    margin-top: 1rem;
    font-style: italic;
    color: var(--accent-light) !important;
    font-size: clamp(0.85rem, 1.8vw, 0.95rem) !important;
    line-height: 1.6;
}

.column-card ul {
    list-style: none;
    padding: 0;
}

.column-card li {
    color: var(--text-secondary);
    font-size: clamp(1rem, 2.2vw, 1.15rem);
    line-height: 1.7;
    margin-bottom: 0.5rem;
    padding-left: 1.25rem;
    position: relative;
}


/* Build-up list: visually reversed so items appear bottom-to-top */
ul.build-up {
    display: flex;
    flex-direction: column-reverse;
}


.columns-footnote {
    margin-top: 1.5rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    font-style: italic;
}

.column-card li::before {
    content: "\25CF";
    color: var(--accent-light);
    position: absolute;
    left: 0;
    font-size: 0.6em;
}

/* ---------- 10. Recap Slide ---------- */
.slide.recap-slide .slide-content {
    text-align: left;
}

.slide.recap-slide h1 {
    color: var(--text-primary);
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.slide.recap-slide ul {
    list-style: none;
    padding: 0;
}

.slide.recap-slide li {
    color: var(--text-secondary);
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    line-height: 1.8;
    margin-bottom: 0.75rem;
    padding-left: 2rem;
    position: relative;
}

.slide.recap-slide li::before {
    content: "\2713";
    color: var(--accent-primary);
    position: absolute;
    left: 0;
    font-weight: 700;
}

.slide.recap-slide .tagline {
    color: var(--accent-light);
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    font-weight: 500;
    margin-top: 2rem;
    font-style: italic;
}

/* ============================================
   COMPONENT STYLES
   ============================================ */

/* ---------- Navigation Hints ---------- */
.nav-hints {
    position: fixed;
    bottom: 1.5rem;
    left: 2rem;
    right: 2rem;
    display: flex;
    justify-content: space-between;
    font-size: clamp(0.875rem, 2vw, 1rem);
    z-index: 10;
}

.nav-hints span {
    cursor: pointer;
    padding: 0.4rem 0.75rem;
    border-radius: 4px;
    color: rgba(122, 149, 168, 0.5);
    transition: color 0.2s ease, background 0.2s ease;
}

.nav-hints span:hover {
    color: var(--accent-light);
    background: rgba(229, 188, 156, 0.12);
}

#nav-next.ready {
    color: var(--accent-light);
    background: rgba(229, 188, 156, 0.12);
}

#fullscreen-btn {
    background: none;
    border: 1px solid rgba(122, 149, 168, 0.3);
    color: rgba(122, 149, 168, 0.5);
    font-size: 1rem;
    cursor: pointer;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    transition: opacity 0.3s ease, color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

#fullscreen-btn.hidden {
    opacity: 0;
    pointer-events: none;
}

#fullscreen-btn:hover {
    color: var(--accent-light);
    background: rgba(229, 188, 156, 0.12);
    border-color: rgba(229, 188, 156, 0.3);
}

/* ---------- Slide Counter ---------- */
.slide-header-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 3rem;
    z-index: 10;
    pointer-events: none;
}

.slide-arc-label {
    color: #4e6a8a;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.slide-arc-label.visible {
    opacity: 1;
}

.slide-counter {
    color: var(--accent-light);
    font-size: 1rem;
    font-weight: 500;
}

/* ============================================
   ARC OVERVIEW LAYOUT (Slide 5)
   ============================================ */

.slide .slide-content.arc-overview-layout {
    display: flex;
    gap: 3rem;
    align-items: center;
    text-align: left;
    max-width: 960px;
}

.arc-overview-text {
    flex: 1;
}

.arc-badges {
    flex: 0 0 130px;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    align-items: center;
}

.arc-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 110px;
    padding: 0.75rem;
    border-radius: 10px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-warm);
}

.arc-badge svg {
    width: 56px;
    height: 56px;
    margin-bottom: 0.5rem;
}

.arc-badge-label {
    color: var(--accent-primary);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.arc-badge-title {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 0.15rem;
}

@media (max-width: 768px) {
    .arc-overview-layout {
        flex-direction: column;
        gap: 1.5rem;
    }

    .arc-badges {
        flex-direction: row;
        gap: 1rem;
    }

    .arc-badge {
        width: 90px;
        padding: 0.5rem;
    }

    .arc-badge svg {
        width: 44px;
        height: 44px;
    }
}

/* ============================================
   STEP-REVEAL SYSTEM
   ============================================ */

/* Hide all steppable elements by default via CSS (no JS flash) */
.slide:not(.title-slide) .slide-content > ul > li,
.slide:not(.title-slide) .slide-content > ul > li > ul > li,
.slide:not(.title-slide) .slide-content > .background-text > ul > li,
.slide:not(.title-slide) .slide-content > .arc-overview-text > ul > li,
.slide:not(.title-slide) .slide-content > .quote-block,
.slide:not(.title-slide) .slide-content > .quote-with-portrait,
.slide:not(.title-slide) .slide-content .flow-item,
.slide:not(.title-slide) .slide-content .flow-arrow,
.slide:not(.title-slide) .slide-content > .svg-container,
.slide:not(.title-slide) .slide-content > .image-placeholder,
.slide:not(.title-slide) .slide-content > p:not(.subtitle):not(.sub-heading):not(.visual-caption),
.slide:not(.title-slide) .slide-content .flow-result,
.slide:not(.title-slide) .slide-content .column-card,
.slide:not(.title-slide) .slide-content .cta-block,
.slide:not(.title-slide) .slide-content .tagline {
    opacity: 0;
    transform: translateY(15px);
    pointer-events: none;
}

/* Hide background photos and card-stack images by default (no flash) */

.stack-card {
    opacity: 0 !important;
}

.stack-card.card-visible {
    opacity: 1 !important;
}

.step {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
    pointer-events: none;
}

.step.step-visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
    pointer-events: auto !important;
}

.step-paired {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
    pointer-events: none;
}

.step-paired.step-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* ============================================
   TRIANGLE TWO-COLUMN LAYOUT (Slide 6)
   ============================================ */

.triangle-layout {
    display: flex;
    gap: 2.5rem;
    align-items: center;
    margin-top: 1.5rem;
}

.triangle-svg {
    flex: 1;
    max-width: 400px;
}

.triangle-svg img {
    width: 100%;
    height: auto;
}

.triangle-traditional {
    flex: 1;
    text-align: left;
}

.triangle-traditional h3 {
    color: var(--accent-primary);
    font-size: clamp(0.8rem, 2vw, 0.95rem);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

/* ---------- Inline GIF ---------- */
.inline-gif-container {
    text-align: center;
    margin: 0.5rem 0;
}

.inline-gif {
    max-height: 120px;
    border-radius: 8px;
    object-fit: cover;
}

/* ---------- Hide on Reveal ---------- */
.hide-on-reveal {
    transition: opacity 0.4s ease;
}

.hide-on-reveal.hidden {
    opacity: 0;
}

/* ---------- Fullscreen Media (single image/gif slides) ---------- */
.media-reveal-slide {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100%;
}

.media-reveal-slide .step:not(.step-visible),
.media-reveal-slide .step-paired:not(.step-visible) {
    height: 0;
    overflow: hidden;
    margin: 0;
    padding: 0;
    transform: none;
}

.media-reveal-slide .step {
    transform: none;
}

.media-headline {
    position: relative;
    z-index: 2;
}

.media-headline.hidden {
    opacity: 0 !important;
    height: 0;
    overflow: hidden;
    margin: 0;
    pointer-events: none;
}

/* Media caption below image */
.media-caption {
    position: relative;
    z-index: 2;
    text-align: center;
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    color: var(--text-primary);
    margin-top: 1rem;
    transition: opacity 0.4s ease;
}

.media-caption.crossed-out {
    opacity: 0 !important;
    position: absolute;
    pointer-events: none;
    transition: none;
}

.media-caption-replace {
    margin-top: 0.5rem;
}

.fullscreen-media {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1;
}

.fullscreen-media img {
    max-width: 90%;
    max-height: 60vh;
    border-radius: 10px;
    object-fit: contain;
}

/* ---------- Slide Closing Statement ---------- */
.slide-closing {
    margin-top: auto;
    padding-top: 1.5rem;
    color: var(--accent-primary);
    font-style: italic;
    font-size: clamp(1rem, 2.2vw, 1.15rem);
    text-align: center;
    width: 100%;
}

/* ---------- Sub-heading (arc label above headline) ---------- */
.sub-heading {
    color: var(--accent-primary);
    font-size: clamp(0.85rem, 1.8vw, 1rem);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1.5rem;
}

/* ---------- Header + Photo Left / List Right Layout ---------- */
.header-photo-layout {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    text-align: left;
    align-items: flex-start;
}

.header-photo-layout > h1,
.header-photo-layout > .sub-heading {
    flex: 0 0 100%;
}

.header-photo-layout > .sub-heading {
    margin-bottom: 0;
}

.header-photo-left {
    flex: 0 0 45%;
    display: flex;
    flex-direction: column;
}

.header-photo-left .background-photo {
    margin-top: 0;
    width: 100%;
}

.header-photo-right {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.header-photo-right ul {
    margin-top: 0;
}

@media (max-width: 768px) {
    .header-photo-layout {
        flex-direction: column;
    }

    .header-photo-left {
        flex: 1;
    }
}

/* ---------- Progressive Photo Opacity ---------- */
.progressive-photo {
    opacity: 0;
    transition: opacity 0.5s ease;
}

/* ---------- Half-Screen Background Image ---------- */
.slide-half-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.slide-half-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.35;
}

.slide-content-right {
    margin-left: 50%;
    width: 50%;
    position: relative;
    z-index: 1;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 3rem 4rem;
    box-sizing: border-box;
}

.slide-half-bg-right {
    left: auto;
    right: 0;
}

.slide-content-left {
    width: 50%;
    margin-right: 50%;
    position: relative;
    z-index: 1;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 3rem 4rem;
    box-sizing: border-box;
}

@media (max-width: 768px) {
    .slide-half-bg {
        width: 100%;
        height: 40%;
    }

    .slide-content-right {
        margin-left: 0;
        width: 100%;
        margin-top: 40%;
        padding: 1.5rem;
    }

    .slide-content-left {
        width: 100%;
        padding: 1.5rem;
    }
}

/* ============================================
   BACKGROUND SLIDE LAYOUT (Slide 3)
   ============================================ */

.background-layout {
    display: flex;
    gap: 4rem;
    align-items: center;
    text-align: left;
    max-width: 900px;
    min-height: 380px;
}

.background-text {
    flex: 1;
}

.background-photo {
    flex: 0 0 30%;
}


.background-photo img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-warm);
    object-fit: cover;
}

@media (max-width: 768px) {
    .background-layout {
        flex-direction: column-reverse;
        gap: 1.5rem;
    }

    .background-photo {
        width: 160px;
    }
}

/* ---------- Sandwich Framework Layout (Slide 15) ---------- */
.sandwich-framework-layout {
    text-align: left;
    max-width: 950px;
}

.sandwich-framework-layout h1 {
    margin-bottom: 0.25rem;
}

.sandwich-framework-layout .subtitle {
    margin-bottom: 1.5rem;
}

.sandwich-columns {
    display: flex;
    gap: 3rem;
    align-items: center;
}

.sandwich-columns .background-photo {
    flex: 0 0 auto;
    width: 33vw;
    max-width: 400px;
}

.sandwich-columns .background-text {
    flex: 1;
}

@media (max-width: 768px) {
    .sandwich-columns {
        flex-direction: column;
        gap: 1.5rem;
    }

    .sandwich-columns .background-photo {
        width: 200px;
    }
}

/* ---------- Card Stack Layout (Slide 9 - Pathos) ---------- */
.card-stack {
    position: relative;
    flex: 0 0 33vw;
    max-width: 400px;
    height: 320px;
}

.stack-card {
    position: absolute;
    width: 75%;
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-warm);
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.4s ease-out;
}

.stack-card:nth-child(1) {
    top: 0;
    left: 0;
    z-index: 1;
}

.stack-card:nth-child(2) {
    top: 30px;
    left: 40px;
    z-index: 2;
}

.stack-card:nth-child(3) {
    top: 60px;
    left: 80px;
    z-index: 3;
}

.stack-card:nth-child(4) {
    top: 90px;
    left: 120px;
    z-index: 4;
}

.stack-card:nth-child(5) {
    top: 120px;
    left: 160px;
    z-index: 5;
}

.stack-card.card-visible {
    opacity: 1 !important;
}

@media (max-width: 768px) {
    .card-stack {
        flex: 0 0 auto;
        width: 200px;
        height: 180px;
        align-self: center;
    }

    .stack-card {
        width: 70%;
    }

    .stack-card:nth-child(2) {
        top: 20px;
        left: 25px;
    }

    .stack-card:nth-child(3) {
        top: 40px;
        left: 50px;
    }

    .stack-card:nth-child(4) {
        top: 60px;
        left: 75px;
    }

    .stack-card:nth-child(5) {
        top: 80px;
        left: 100px;
    }
}

/* ---------- Ethos Three-Column Layout (Slide 8) ---------- */
.ethos-layout {
    text-align: left;
    max-width: 960px !important;
}

.ethos-columns {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    margin-top: 1.5rem;
}

.traditional-appeal {
    flex: 1;
    text-align: left;
    transition: opacity 0.4s ease;
}

.traditional-appeal h3 {
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.traditional-appeal ul {
    list-style: none;
    padding: 0;
}

.traditional-appeal li {
    color: var(--text-secondary) !important;
    font-size: 1rem !important;
    line-height: 1.7 !important;
    padding-left: 1.5rem !important;
    position: relative;
    margin-bottom: 0.4rem !important;
    transition: all 0.4s ease;
}

.traditional-appeal li::before {
    content: "\25CF" !important;
    color: var(--accent-primary) !important;
    position: absolute;
    left: 0;
    font-size: 0.75em !important;
    transition: all 0.4s ease;
}

/* Crossed-out state */
.traditional-appeal.crossed-out li {
    text-decoration: line-through;
    opacity: 0.4 !important;
    color: var(--text-muted) !important;
}

.traditional-appeal.crossed-out li::before {
    content: "\2717" !important;
    color: #c45 !important;
}

.ethos-photo {
    flex: 0 0 180px;
}

.ethos-photo img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-warm);
    object-fit: cover;
}

.ethos-approved {
    flex: 1;
    text-align: left;
}

.ethos-approved h3 {
    color: var(--accent-light);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.ethos-approved ul {
    list-style: none;
    padding: 0;
}

.ethos-approved li {
    color: var(--text-secondary) !important;
    font-size: 1rem !important;
    line-height: 1.7 !important;
    padding-left: 1.5rem !important;
    position: relative;
    margin-bottom: 0.4rem !important;
}

.ethos-approved li::before {
    content: "\2713" !important;
    color: var(--accent-primary) !important;
    position: absolute;
    left: 0;
    font-size: 0.85em !important;
}

.ethos-summary {
    text-align: center;
    color: var(--accent-light);
    font-size: 0.95rem;
    font-style: italic;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .ethos-columns {
        flex-direction: column;
        gap: 1.5rem;
    }

    .ethos-photo {
        flex: 0 0 auto;
        width: 160px;
        align-self: center;
    }
}

.triangle-traditional ul {
    list-style: none;
    padding: 0;
}

.triangle-traditional li {
    color: var(--text-secondary);
    font-size: clamp(0.85rem, 2vw, 1rem);
    line-height: 1.7;
    margin-bottom: 0.6rem;
    padding-left: 1.25rem;
    position: relative;
}

.triangle-traditional li::before {
    content: "\25CF";
    color: var(--accent-primary);
    position: absolute;
    left: 0;
    font-size: 0.6em;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.highlight {
    color: var(--accent-primary);
    font-weight: 600;
}

.underline-accent {
    text-decoration: underline;
    text-decoration-color: var(--accent-primary);
    text-underline-offset: 4px;
}

.emphasis-soft {
    color: #8bb8a8 !important;
    font-style: italic;
}

.dimmed {
    color: var(--text-muted);
}

/* ---------- SVG containers ---------- */
.svg-container {
    margin: 1.5rem auto;
    max-width: 400px;
    width: 80%;
}

.svg-container svg {
    width: 100%;
    height: auto;
}

/* Inline SVG within visual slides */
.visual-slide .svg-container {
    max-width: 500px;
}

/* ---------- Narrative text (story slides) ---------- */
.narrative-text {
    color: var(--text-secondary);
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.narrative-text:last-child {
    margin-bottom: 0;
}

.narrative-quote {
    color: var(--text-primary);
    font-size: clamp(1rem, 2.5vw, 1.15rem);
    line-height: 1.8;
    font-style: italic;
    border-left: 2px solid var(--accent-primary);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
}

/* ---------- CTA (final slide) ---------- */
.cta-block {
    margin-top: 2rem;
}

.cta-block p {
    color: var(--accent-light);
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    font-weight: 500;
    line-height: 1.7;
    margin-bottom: 0.5rem;
}

.cta-block .cta-emphasis {
    color: var(--accent-primary);
    font-size: clamp(1.125rem, 3vw, 1.5rem);
    font-weight: 700;
    margin-top: 1rem;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes slideIn {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .slide {
        transition: none;
    }
    .slide.active .slide-content {
        animation: none;
    }
    .step {
        transform: none;
        transition: opacity 0.2s ease;
    }
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Tablet landscape */
@media (max-width: 1024px) {
    .slide {
        padding: 3rem 2.5rem;
    }

    .slide-content {
        max-width: 700px;
    }

    .columns-grid {
        gap: 1rem;
    }

    .column-card {
        padding: 1rem 1.25rem;
    }

    .visual-slide img,
    .image-placeholder {
        max-width: 70%;
        width: 70%;
    }
}

    .triangle-layout {
        gap: 1.5rem;
    }

    .triangle-svg {
        max-width: 320px;
    }

/* Tablet portrait */
@media (max-width: 768px) {
    .slide {
        padding: 3rem 2rem;
    }

    .slide-content {
        max-width: 100%;
    }

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

    .triangle-layout {
        flex-direction: column;
        gap: 1.5rem;
    }

    .triangle-svg {
        max-width: 280px;
    }

    .nav-hints {
        bottom: 1rem;
        left: 1.5rem;
        right: 1.5rem;
    }

    .slide-header-bar {
        padding: 1rem 1.5rem;
    }

    .visual-slide img,
    .image-placeholder {
        max-width: 85%;
        width: 85%;
    }

    .quote-block {
        padding: 1.25rem 1.5rem;
    }

    .svg-container {
        max-width: 300px;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .slide {
        padding: 2.5rem 1.25rem;
    }

    .nav-hints {
        bottom: 0.75rem;
        left: 1rem;
        right: 1rem;
        font-size: 0.75rem;
    }

    .slide-header-bar {
        padding: 0.75rem 1rem;
    }

    .slide-counter {
        font-size: 0.875rem;
    }

    .visual-slide img,
    .image-placeholder {
        max-width: 95%;
        width: 95%;
    }

    .quote-block {
        padding: 1rem 1.25rem;
    }

    .columns-grid {
        gap: 0.75rem;
    }

    .svg-container {
        max-width: 250px;
    }

    .flow-item .step-label,
    .flow-item .step-desc {
        font-size: 0.85rem;
    }
}