/**
 * NSB Bangalore - About NSB Page Styles
 * File: css/sections/about-nsb/about-nsb.css
 * Purpose: All styles for the about-nsb.php page and its components.
 * Approach: Mobile-first responsive design
 * Dependencies: CSS variables from main-config.php
 * Last Updated: [CURRENT_DATE]
 */

/* ===== CSS RESET & BASE STYLES ===== */
.about-nsb-tabs-container,
.about-nsb-content-container,
.tab-section,
.committee-card,
.partner-card,
.leader-card {
    box-sizing: border-box;
}

/* ===== PAGE HERO ===== */
.page-hero {
    background-color: var(--nsb-primary);
    color: var(--nsb-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.hero-title {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.hero-subtitle {
    font-family: var(--font-secondary);
    font-size: 1.2rem;
    font-weight: var(--font-weight-regular);
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}

/* ===== TAB NAVIGATION ===== */
.about-nsb-tabs-container {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--nsb-white);
    border-bottom: 2px solid var(--nsb-accent);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: box-shadow var(--transition-normal);
}

.about-nsb-tabs-container.sticky-active {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.tabs-scroll-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
}

.tabs-scroll-wrapper::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Edge */
}

.about-nsb-tabs-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    min-width: min-content;
}

.tab-item {
    flex: 0 0 auto;
}

.tab-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--nsb-text-secondary);
    text-decoration: none;
    font-family: var(--font-primary);
    font-weight: var(--font-weight-medium);
    border-bottom: 3px solid transparent;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.tab-link:hover {
    color: var(--nsb-primary);
    background-color: rgba(20, 33, 61, 0.03);
}

.tab-link.active {
    color: var(--nsb-primary);
    border-bottom-color: var(--nsb-accent);
    background-color: rgba(20, 33, 61, 0.05);
}

.tab-icon {
    margin-right: var(--spacing-sm);
    font-size: 1.1rem;
}

.tab-text {
    font-size: 1rem;
}

/* ===== TAB CONTENT CONTAINER ===== */
.about-nsb-content-container {
    padding: var(--spacing-xl) 0;
    background-color: var(--nsb-background);
}

.tab-content {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.tab-content.active {
    display: block;
}

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

@media (prefers-reduced-motion: reduce) {
    .tab-content,
    .tab-link {
        transition: none;
    }
    
    @keyframes fadeIn {
        from { opacity: 1; }
        to { opacity: 1; }
    }
}

/* ===== SECTION STYLES ===== */
.tab-section {
    margin-bottom: var(--spacing-xl);
    background-color: var(--nsb-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.section-title {
    font-family: var(--font-primary);
    font-size: 1.8rem;
    font-weight: var(--font-weight-semi-bold);
    color: var(--nsb-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--nsb-light);
}

.section-content {
    font-family: var(--font-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--nsb-text-primary);
}

.section-content p {
    margin-bottom: var(--spacing-md);
}

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

/* ===== HIGHLIGHT CARDS (Vision, Mission, Quality Policy) ===== */
.highlight-cards .card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.value-card {
    background: linear-gradient(135deg, rgba(252, 163, 17, 0.05) 0%, rgba(20, 33, 61, 0.03) 100%);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    border: 1px solid rgba(252, 163, 17, 0.2);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.value-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
}

.card-icon {
    color: var(--nsb-accent);
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.card-title {
    font-family: var(--font-primary);
    font-size: 1.4rem;
    font-weight: var(--font-weight-semi-bold);
    color: var(--nsb-primary);
    margin-bottom: var(--spacing-sm);
}

.card-content p {
    margin-bottom: 0;
    color: var(--nsb-text-secondary);
}

/* ===== LEADERSHIP GRID ===== */
.leadership-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.leader-card {
    border: 1px solid var(--nsb-light);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    background-color: var(--nsb-white);
    transition: border-color var(--transition-normal);
}

.leader-card:hover {
    border-color: var(--nsb-accent);
}

.leader-header {
    margin-bottom: var(--spacing-md);
}

.leader-name {
    font-family: var(--font-primary);
    font-size: 1.3rem;
    font-weight: var(--font-weight-semi-bold);
    color: var(--nsb-primary);
    margin-bottom: 0.3rem;
}

.leader-role {
    color: var(--nsb-accent);
    font-weight: var(--font-weight-medium);
}

.leader-affiliation {
    font-style: italic;
    color: var(--nsb-text-light);
}

.leader-qualifications,
.leader-bio {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-md);
}

.leader-qualifications li,
.leader-bio li {
    margin-bottom: 0.3rem;
    color: var(--nsb-text-secondary);
}

.leader-bio.simple-list li {
    list-style-type: none;
    padding-left: 0;
    font-weight: var(--font-weight-medium);
}

/* ===== PARTNERSHIPS GRID ===== */
.partnerships-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.partner-card {
    border: 1px solid var(--nsb-light);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    background-color: var(--nsb-white);
}

.partner-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--nsb-light);
}

.partner-name {
    font-family: var(--font-primary);
    font-size: 1.3rem;
    font-weight: var(--font-weight-semi-bold);
    color: var(--nsb-primary);
    margin-bottom: 0.5rem;
}

.partner-tagline {
    font-family: var(--font-secondary);
    font-style: italic;
    color: var(--nsb-text-light);
    font-size: 0.95rem;
}

.partner-details p {
    margin-bottom: var(--spacing-md);
}

.partner-details h4 {
    font-family: var(--font-primary);
    color: var(--nsb-primary);
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.partner-details ul {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-md);
}

.partner-details li {
    margin-bottom: 0.5rem;
    color: var(--nsb-text-secondary);
}

/* ===== COMMITTEES SECTION ===== */
.committee-card {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--nsb-white);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--nsb-light);
}

.committee-card:last-child {
    margin-bottom: 0;
}

.committee-title {
    font-family: var(--font-primary);
    font-size: 1.4rem;
    font-weight: var(--font-weight-semi-bold);
    color: var(--nsb-primary);
    margin-bottom: var(--spacing-sm);
}

.committee-reference {
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    color: var(--nsb-text-light);
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

/* Committee Tables */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: var(--spacing-md);
}

.committee-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-secondary);
    font-size: 0.95rem;
}

.committee-table thead {
    background-color: var(--nsb-primary);
    color: var(--nsb-white);
}

.committee-table th {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    font-weight: var(--font-weight-semi-bold);
    white-space: nowrap;
}

.committee-table tbody tr {
    border-bottom: 1px solid var(--nsb-light);
}

.committee-table tbody tr:nth-child(even) {
    background-color: rgba(229, 229, 229, 0.3);
}

.committee-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--nsb-text-secondary);
    vertical-align: top;
}

/* ===== ACCREDITATIONS SECTION ===== */
.accreditations-docs {
    margin-top: var(--spacing-xl);
}

.docs-title {
    font-family: var(--font-primary);
    font-size: 1.4rem;
    color: var(--nsb-primary);
    margin-bottom: var(--spacing-lg);
}

.docs-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.doc-card {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--nsb-white);
    border: 1px solid var(--nsb-light);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
}

.doc-card:hover {
    border-color: var(--nsb-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.doc-icon {
    color: var(--nsb-accent);
    font-size: 1.8rem;
    margin-right: var(--spacing-md);
    flex-shrink: 0;
}

.doc-info {
    flex-grow: 1;
}

.doc-title {
    font-family: var(--font-primary);
    font-size: 1.1rem;
    font-weight: var(--font-weight-medium);
    color: var(--nsb-primary);
    margin-bottom: 0.3rem;
}

.doc-link {
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    color: var(--nsb-accent);
}

.no-docs {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--nsb-text-light);
    font-style: italic;
}

/* ===== ASSOCIATIONS SECTION ===== */
.partner-category {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--nsb-white);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--nsb-light);
}

.partner-category:last-child {
    margin-bottom: 0;
}

.category-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--nsb-light);
}

.category-icon {
    color: var(--nsb-accent);
    font-size: 1.5rem;
    margin-right: var(--spacing-sm);
}

.category-title {
    font-family: var(--font-primary);
    font-size: 1.4rem;
    font-weight: var(--font-weight-semi-bold);
    color: var(--nsb-primary);
    margin: 0;
}

.logo-grid-placeholder {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.placeholder-card {
    background: linear-gradient(135deg, rgba(252, 163, 17, 0.05) 0%, rgba(229, 229, 229, 0.3) 100%);
    border: 2px dashed var(--nsb-light);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.placeholder-icon {
    color: var(--nsb-text-light);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.placeholder-text {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-medium);
    color: var(--nsb-text-secondary);
    margin-bottom: 0.3rem;
}

.placeholder-subtext {
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    color: var(--nsb-text-light);
    font-style: italic;
}

/* ===== DOWNLOADS SECTION ===== */
.downloads-list {
    margin-top: var(--spacing-lg);
}

.download-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--nsb-white);
    border: 1px solid var(--nsb-light);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-sm);
    transition: border-color var(--transition-normal);
}

.download-item:hover {
    border-color: var(--nsb-accent);
}

.download-icon {
    color: var(--nsb-accent);
    font-size: 1.5rem;
    margin-right: var(--spacing-md);
    flex-shrink: 0;
}

.download-info {
    flex-grow: 1;
}

.download-title {
    font-family: var(--font-primary);
    font-size: 1.1rem;
    font-weight: var(--font-weight-medium);
    color: var(--nsb-primary);
    margin-bottom: 0.2rem;
}

.download-meta {
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    color: var(--nsb-text-light);
}

.download-button {
    background-color: var(--nsb-accent);
    color: var(--nsb-white);
    border: none;
    border-radius: var(--border-radius-round);
    padding: 0.6rem 1.2rem;
    font-family: var(--font-primary);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--transition-normal);
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
}

.download-button:hover {
    background-color: #e59400; /* Darker shade of accent */
}

.download-button i {
    margin-right: 0.5rem;
}

.downloads-note {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: rgba(252, 163, 17, 0.05);
    border-radius: var(--border-radius-md);
    font-size: 0.9rem;
    color: var(--nsb-text-secondary);
}

.downloads-note i {
    color: var(--nsb-accent);
    margin-right: 0.5rem;
}

/* ===== PROFILE SIGNATURE (President's Message) ===== */
.profile-signature {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--nsb-light);
    text-align: right;
}

.profile-name {
    font-family: var(--font-primary);
    font-size: 1.2rem;
    font-weight: var(--font-weight-semi-bold);
    color: var(--nsb-primary);
    margin-bottom: 0.2rem;
}

.profile-title {
    font-family: var(--font-secondary);
    font-style: italic;
    color: var(--nsb-text-light);
}

/* ===== CONTENT PLACEHOLDER (Fallback) ===== */
.content-placeholder {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    color: var(--nsb-text-light);
}

.content-placeholder i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--nsb-light);
}

.content-placeholder h3 {
    font-family: var(--font-primary);
    color: var(--nsb-text-secondary);
    margin-bottom: var(--spacing-sm);
}

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

/* Tablet Styles (≥768px) */
@media (min-width: 768px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .tab-link {
        padding: var(--spacing-md) var(--spacing-xl);
    }
    
    .highlight-cards .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .leadership-grid,
    .partnerships-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .docs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .logo-grid-placeholder {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .tab-section {
        padding: var(--spacing-xl);
    }
}

/* Desktop Styles (≥1024px) */
@media (min-width: 1024px) {
    .about-nsb-tabs-list {
        justify-content: center;
    }
    
    .tab-item {
        flex: 0 1 auto;
    }
    
    .leadership-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .partnerships-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .committee-table {
        font-size: 1rem;
    }
}

/* Small Mobile Adjustments (≤480px) */
@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .tab-link {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .tab-icon {
        font-size: 1rem;
        margin-right: 0.5rem;
    }
    
    .tab-text {
        font-size: 0.9rem;
    }
    
    .tab-section {
        padding: var(--spacing-md);
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .leader-card,
    .partner-card,
    .committee-card,
    .partner-category {
        padding: var(--spacing-md);
    }
    
    .download-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .download-icon {
        margin-right: 0;
        margin-bottom: var(--spacing-sm);
    }
    
    .download-button {
        margin-top: var(--spacing-sm);
        align-self: flex-end;
    }
}