/* =================================================================
   Phase 3: Case Study Modal System
   Detailed project stories with rich media and metrics
   ================================================================= */

/* ===== MODAL OVERLAY ===== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ===== CASE STUDY MODAL ===== */

.case-study-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    width: 90%;
    max-width: 1200px;
    max-height: 90vh;
    background: var(--bg-primary);
    border-radius: 24px;
    border: 2px solid var(--border-primary);
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.case-study-modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

/* ===== MODAL HEADER ===== */

.modal-header {
    position: relative;
    padding: 2.5rem 3rem;
    background: linear-gradient(135deg, var(--card-bg), var(--bg-secondary));
    border-bottom: 2px solid var(--border-primary);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 44px;
    height: 44px;
    background: var(--bg-primary);
    border: 2px solid var(--border-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
    font-size: 20px;
    z-index: 10;
}

.modal-close:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
    transform: rotate(90deg) scale(1.1);
}

.modal-title {
    font-size: 2.25rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.2;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 800px;
}

.modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.modal-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--border-primary);
    transition: all 0.3s ease;
}

.modal-tag.industry {
    border-color: var(--strategy-border);
    color: var(--strategy-accent);
}

.modal-tag.timeline {
    border-color: var(--platform-border);
    color: var(--platform-accent);
}

.modal-tag.team {
    border-color: var(--security-border);
    color: var(--security-accent);
}

/* ===== MODAL CONTENT ===== */

.modal-content {
    overflow-y: auto;
    padding: 3rem;
    flex: 1;
}

.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

/* ===== HERO IMAGE ===== */

.case-hero-image {
    width: 100%;
    height: 400px;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 3rem;
    position: relative;
}

.case-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-hero-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
    color: white;
}

.hero-stat {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 8px 16px;
    border-radius: 12px;
    margin-right: 1rem;
    font-weight: 600;
}

/* ===== CONTENT SECTIONS ===== */

.case-section {
    margin-bottom: 3rem;
}

.case-section:last-child {
    margin-bottom: 0;
}

.section-title {
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 1rem;
    border-bottom: 3px solid var(--border-primary);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 80px;
    height: 3px;
    background: var(--gradient-primary);
}

.section-title i {
    color: var(--accent-primary);
    font-size: 1.5rem;
}

.section-content {
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 1.05rem;
}

.section-content p {
    margin-bottom: 1.25rem;
}

.section-content ul {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.section-content li {
    margin-bottom: 1rem;
    position: relative;
}

.section-content li::before {
    content: '\f058';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: -2rem;
    color: var(--platform-accent);
}

/* ===== CHALLENGE-SOLUTION-RESULTS GRID ===== */

.csr-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 2rem 0;
}

.csr-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 2rem;
    border: 2px solid var(--border-primary);
    transition: all 0.3s ease;
}

.csr-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

.csr-card.challenge {
    border-top: 4px solid #ef4444;
}

.csr-card.solution {
    border-top: 4px solid var(--strategy-accent);
}

.csr-card.results {
    border-top: 4px solid var(--platform-accent);
}

.csr-icon {
    width: 60px;
    height: 60px;
    background: var(--bg-secondary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 28px;
}

.csr-card.challenge .csr-icon {
    color: #ef4444;
}

.csr-card.solution .csr-icon {
    color: var(--strategy-accent);
}

.csr-card.results .csr-icon {
    color: var(--platform-accent);
}

.csr-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.csr-content {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== METRICS SHOWCASE ===== */

.case-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin: 2.5rem 0;
    padding: 2.5rem;
    background: var(--bg-secondary);
    border-radius: 20px;
}

.case-metric {
    text-align: center;
}

.case-metric-icon {
    width: 60px;
    height: 60px;
    background: var(--card-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 24px;
    color: var(--accent-primary);
}

.case-metric-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.case-metric-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* ===== TECHNOLOGY STACK ===== */

.tech-stack {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.tech-item {
    background: var(--card-bg);
    border: 2px solid var(--border-primary);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.tech-item:hover {
    border-color: var(--accent-primary);
    transform: translateX(8px);
}

.tech-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-secondary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.tech-name {
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== TIMELINE ===== */

.case-timeline {
    position: relative;
    padding-left: 3rem;
    margin: 2rem 0;
}

.case-timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
}

.timeline-event {
    position: relative;
    margin-bottom: 2.5rem;
    padding-left: 2rem;
}

.timeline-event::before {
    content: '';
    position: absolute;
    left: -2.9rem;
    top: 5px;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border: 4px solid var(--bg-primary);
    border-radius: 50%;
    z-index: 1;
}

.timeline-date {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== QUOTE CALLOUT ===== */

.case-quote {
    background: var(--card-bg);
    border-left: 4px solid var(--accent-primary);
    padding: 2rem 2.5rem;
    margin: 2.5rem 0;
    border-radius: 12px;
    position: relative;
}

.case-quote::before {
    content: '\f10d';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    font-size: 60px;
    color: var(--accent-primary);
    opacity: 0.1;
}

.quote-text {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--text-primary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.quote-role {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== MODAL FOOTER ===== */

.modal-footer {
    padding: 2rem 3rem;
    background: var(--bg-secondary);
    border-top: 2px solid var(--border-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-cta {
    display: flex;
    gap: 1rem;
}

.modal-btn {
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.modal-btn.primary {
    background: var(--accent-primary);
    color: white;
    border: 2px solid var(--accent-primary);
}

.modal-btn.primary:hover {
    background: var(--gradient-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(245, 128, 78, 0.3);
}

.modal-btn.secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-primary);
}

.modal-btn.secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ===== SHARE BUTTONS ===== */

.share-buttons {
    display: flex;
    gap: 0.75rem;
}

.share-btn {
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border: 2px solid var(--border-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-secondary);
}

.share-btn:hover {
    transform: translateY(-4px);
}

.share-btn.linkedin:hover {
    background: #0077b5;
    border-color: #0077b5;
    color: white;
}

.share-btn.twitter:hover {
    background: #1DA1F2;
    border-color: #1DA1F2;
    color: white;
}

.share-btn.email:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

/* ===== RESPONSIVE DESIGN ===== */

@media (max-width: 1024px) {
    .case-study-modal {
        width: 95%;
        max-height: 95vh;
    }

    .modal-header {
        padding: 2rem 2.5rem;
    }

    .modal-content {
        padding: 2.5rem;
    }

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

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

@media (max-width: 768px) {
    .modal-header {
        padding: 1.5rem 2rem;
    }

    .modal-title {
        font-size: 1.75rem;
        margin-right: 3rem;
    }

    .modal-subtitle {
        font-size: 1rem;
    }

    .modal-content {
        padding: 2rem;
    }

    .case-hero-image {
        height: 250px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .case-metrics {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
        padding: 2rem;
    }

    .case-metric-value {
        font-size: 2rem;
    }

    .tech-stack {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .modal-footer {
        flex-direction: column;
        gap: 1.5rem;
        padding: 1.5rem 2rem;
    }

    .footer-cta {
        width: 100%;
        flex-direction: column;
    }

    .modal-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .modal-header {
        padding: 1.25rem 1.5rem;
    }

    .modal-content {
        padding: 1.5rem;
    }

    .case-metrics {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 1.5rem;
    }

    .case-section {
        margin-bottom: 2rem;
    }
}

/* ===== DARK THEME ADJUSTMENTS ===== */

[data-theme="dark"] .case-study-modal {
    background: rgba(15, 23, 42, 0.98);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .modal-header {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.6));
}

[data-theme="dark"] .modal-footer {
    background: rgba(15, 23, 42, 0.8);
}

[data-theme="dark"] .csr-card {
    background: rgba(30, 41, 59, 0.6);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .case-metrics {
    background: rgba(15, 23, 42, 0.8);
}

[data-theme="dark"] .case-metric-icon {
    background: rgba(30, 41, 59, 0.8);
}

[data-theme="dark"] .tech-item {
    background: rgba(30, 41, 59, 0.6);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .case-quote {
    background: rgba(30, 41, 59, 0.6);
}

[data-theme="dark"] .share-btn {
    background: rgba(30, 41, 59, 0.8);
    border-color: rgba(255, 255, 255, 0.1);
}