/* =================================================================
   Case Study & App Showcase Pages
   Namespaced with cs- prefix to avoid collision with component card styles
   ================================================================= */

/* ----- Hero ----- */
.cs-hero {
    background: #F0EDE8;
    padding: 140px 0 60px;
    margin-top: 73px;
    height: 480px;
}

.cs-back-link {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    text-decoration: none;
    margin-bottom: 20px;
    transition: color 0.2s;
}

.cs-back-link:hover {
    color: var(--color-text);
}

.cs-tag {
    display: inline-block;
    color: var(--color-accent-dark);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-family: var(--font-body);
    margin-bottom: 16px;
}

.cs-hero h1 {
    font-size: 3.5rem;
    font-weight: 400;
    color: var(--color-text);
    margin-bottom: 16px;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.cs-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    line-height: 1.7;
    margin: 0;
}

/* ----- App Logo in Hero ----- */
.cs-app-logo {
    display: block;
    max-width: 280px;
    height: auto;
    margin-bottom: 20px;
}

.cs-hero .cs-cta {
    margin-top: 32px;
}

/* ----- App Hero (side-by-side, for video embed) ----- */
.cs-hero-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

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

.cs-hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

/* ----- Hero Image (full-width) ----- */
.cs-hero-img {
    margin-top: 48px;
}

.cs-hero-img img {
    width: 100%;
    height: auto;
    border-radius: 4px;
}

/* ----- Overview Grid ----- */
.cs-overview {
    padding: 48px 0;
    border-bottom: 1px solid var(--color-border);
}

.cs-overview-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.cs-overview-item h4 {
    font-family: var(--font-body);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

.cs-overview-item p {
    font-size: 1rem;
    color: var(--color-text);
    margin: 0;
    font-weight: 500;
}

/* ----- Content Sections ----- */
.cs-section {
    padding: 80px 0;
}

.cs-section.cs-alt {
    background: var(--color-white);
}

.cs-section h2 {
    font-size: 2rem;
    font-weight: 400;
    color: var(--color-text);
    margin-bottom: 24px;
}

.cs-section p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    max-width: 800px;
}

.cs-section p + p {
    margin-top: 16px;
}

/* Styled list */
.cs-list {
    list-style: none;
    padding: 0;
    margin: 24px 0 0;
    max-width: 800px;
}

.cs-list li {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    padding-left: 24px;
    position: relative;
    margin-bottom: 12px;
}

.cs-list li::before {
    content: "\2014";
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* ----- Metrics Callout ----- */
.cs-metrics {
    padding: 64px 0;
    background: #F0EDE8;
}

.cs-metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
    text-align: center;
}

.cs-metric-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--color-text);
    line-height: 1;
    margin-bottom: 8px;
}

.cs-metric-label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.4;
}

/* ----- Before/After ----- */
.cs-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-top: 32px;
}

.cs-comparison-card {
    border-top: 3px solid var(--color-border);
    padding-top: 24px;
}

.cs-comparison-card.cs-after {
    border-top-color: var(--color-accent);
}

.cs-comparison-card h3 {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.cs-comparison-card.cs-after h3 {
    color: var(--color-accent-dark);
}

.cs-comparison-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.cs-comparison-card ul li {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    padding-left: 20px;
    position: relative;
    margin-bottom: 10px;
}

.cs-comparison-card ul li::before {
    content: "\2014";
    position: absolute;
    left: 0;
    color: var(--color-border);
}

.cs-comparison-card.cs-after ul li::before {
    color: var(--color-accent);
}

/* ----- Frameworks ----- */
.cs-framework {
    margin-top: 48px;
    padding-top: 48px;
    border-top: 1px solid var(--color-border);
}

.cs-framework:first-of-type {
    border-top: none;
    padding-top: 0;
}

.cs-framework-title {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--color-text);
    margin-bottom: 8px;
}

.cs-framework-desc {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 800px;
}

/* Indicator Spectrum */
.cs-spectrum {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--color-border);
    border-radius: 8px;
    overflow: hidden;
}

.cs-spectrum-item {
    background: var(--color-white);
    padding: 24px;
    position: relative;
}

.cs-spectrum-item.cs-spectrum-priority {
    background: #faf7f4;
    border: 2px solid var(--color-accent-dark);
}

.cs-spectrum-priority-tag {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-white);
    background: var(--color-accent-dark);
    padding: 3px 10px;
    border-radius: 3px;
    margin-bottom: 12px;
}

.cs-spectrum-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
}

.cs-spectrum-sublabel {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.cs-spectrum-body {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    font-style: italic;
    margin-bottom: 16px;
}

.cs-spectrum-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.cs-spectrum-examples span {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: #F0EDE8;
    padding: 3px 10px;
    border-radius: 100px;
}

/* Metrics Hierarchy */
.cs-hierarchy {
    max-width: 700px;
}

.cs-hierarchy-tier {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
}

.cs-hierarchy-tier:last-child {
    border-bottom: none;
}

.cs-hierarchy-badge {
    flex-shrink: 0;
    width: 90px;
    padding: 8px 0;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 6px;
    border: 1.5px solid var(--color-border);
    color: var(--color-text-secondary);
    background: var(--color-white);
}

.cs-hierarchy-tier-1 .cs-hierarchy-badge {
    border-color: var(--color-accent-dark);
    color: var(--color-accent-dark);
    background: rgba(130, 21, 103, 0.04);
}

.cs-hierarchy-tier-2 .cs-hierarchy-badge {
    border-color: var(--color-accent);
    color: var(--color-accent-dark);
    background: rgba(130, 21, 103, 0.02);
}

.cs-hierarchy-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 4px;
}

.cs-hierarchy-desc {
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

/* ----- 7D Process Method ----- */
.cs-process .cs-hierarchy-badge {
    width: 110px;
}

.cs-phase-tag {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-secondary);
    background: #F0EDE8;
    padding: 2px 8px;
    border-radius: 3px;
    margin-left: 8px;
    vertical-align: middle;
}

.cs-hierarchy-tier-1 .cs-phase-tag {
    color: var(--color-accent-dark);
    background: rgba(130, 21, 103, 0.06);
}

/* ----- Key Takeaways ----- */
.cs-takeaways {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 32px;
}

.cs-takeaway-card {
    border-top: 1px solid var(--color-border);
    padding-top: 20px;
}

.cs-takeaway-card h3 {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--color-text);
    margin-bottom: 8px;
}

.cs-takeaway-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ----- Features Grid (App pages) ----- */
.cs-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 32px;
}

.cs-feature-card {
    border-top: 1px solid var(--color-border);
    padding-top: 20px;
}

.cs-feature-icon {
    color: var(--color-accent-dark);
    opacity: 0.6;
    margin-bottom: 12px;
}

.cs-feature-card h3 {
    font-size: 1.15rem;
    font-weight: 400;
    color: var(--color-text);
    margin-bottom: 8px;
}

.cs-feature-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ----- Screenshots Gallery ----- */
.cs-screenshots {
    margin-top: 32px;
}

.cs-screenshot {
    margin-bottom: 32px;
}

.cs-screenshot:last-child {
    margin-bottom: 0;
}

.cs-screenshot img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

.cs-screenshot-caption {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-top: 8px;
    text-align: center;
}

/* ----- Tech Stack Tags ----- */
.cs-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.cs-tech-tag {
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    padding: 8px 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

/* ----- CTA Section ----- */
.cs-cta-section {
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.cs-cta-section h2 {
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 16px;
}

.cs-cta-section p {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ----- Notify Form ----- */
.cs-notify-form {
    margin: 0 auto;
    max-width: 480px;
}

.cs-notify-input-group {
    display: flex;
    gap: 0;
}

.cs-notify-input-group input[type="email"] {
    flex: 1;
    padding: 14px 20px;
    font-size: 0.95rem;
    font-family: var(--font-body);
    border: 1.5px solid var(--color-border);
    border-right: none;
    border-radius: 3px 0 0 3px;
    background: var(--color-white);
    color: var(--color-text);
    outline: none;
    transition: border-color 0.2s;
}

.cs-notify-input-group input[type="email"]:focus {
    border-color: var(--color-text);
}

.cs-notify-input-group input[type="email"]::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.6;
}

.cs-notify-input-group .cta-button {
    border-radius: 0 3px 3px 0;
    white-space: nowrap;
}

.cs-notify-message {
    font-size: 0.85rem;
    margin-top: 12px;
    margin-bottom: 0;
}

.cs-notify-message.success {
    color: var(--color-accent-dark);
}

.cs-notify-message.error {
    color: #c0392b;
}

@media (max-width: 600px) {
    .cs-notify-input-group {
        flex-direction: column;
        gap: 12px;
    }

    .cs-notify-input-group input[type="email"] {
        border-right: 1.5px solid var(--color-border);
        border-radius: 3px;
    }

    .cs-notify-input-group .cta-button {
        border-radius: 3px;
    }
}

/* ----- Navigation Footer ----- */
.cs-nav-footer {
    padding: 80px 0;
    border-top: 1px solid var(--color-border);
}

.cs-nav-footer .container {
    display: flex;
    justify-content: flex-end;
}

.cs-next {
    text-align: left;
}

.cs-next-label {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-dark);
    display: block;
    margin-bottom: 8px;
}

.cs-next-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.2s;
}

.cs-next-title:hover {
    color: var(--color-accent-dark);
}

/* =================================================================
   Responsive: 1024px
   ================================================================= */
@media (max-width: 1024px) {
    .cs-hero h1 {
        font-size: 2.75rem;
    }

    .cs-hero-split {
        gap: 40px;
    }

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

    .cs-metrics-grid {
        gap: 32px;
    }

    .cs-comparison {
        gap: 32px;
    }

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

    .cs-features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

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

/* =================================================================
   Responsive: 768px
   ================================================================= */
@media (max-width: 768px) {
    .cs-hero {
        padding: 120px 0 48px;
        margin-top: 60px;
        min-height: 380px;
    }

    .cs-hero h1 {
        font-size: 2.25rem;
    }

    .cs-hero-split {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .cs-hero-image {
        order: -1;
    }

    .cs-hero-image img {
        max-width: 280px;
    }

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

    .cs-section {
        padding: 60px 0;
    }

    .cs-section h2 {
        font-size: 1.75rem;
    }

    .cs-metrics {
        padding: 48px 0;
    }

    .cs-metrics-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .cs-metric-number {
        font-size: 2rem;
    }

    .cs-comparison {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .cs-takeaways {
        grid-template-columns: 1fr;
    }

    .cs-features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .cs-spectrum {
        grid-template-columns: 1fr;
    }

    .cs-hierarchy-tier {
        gap: 16px;
    }

    .cs-hierarchy-badge {
        width: 72px;
        font-size: 0.7rem;
    }

    .cs-process .cs-hierarchy-badge {
        width: 85px;
        font-size: 0.65rem;
    }

    .cs-phase-tag {
        display: block;
        margin-left: 0;
        margin-top: 4px;
    }

    .cs-nav-footer {
        padding: 60px 0;
    }

    .cs-next-title {
        font-size: 1.25rem;
    }
}

/* =================================================================
   Responsive: 480px
   ================================================================= */
@media (max-width: 480px) {
    .cs-hero h1 {
        font-size: 1.85rem;
    }

    .cs-overview-grid {
        grid-template-columns: 1fr 1fr;
    }

    .cs-section h2 {
        font-size: 1.5rem;
    }

    .cs-metric-number {
        font-size: 1.75rem;
    }
}