/**
 * Main Stylesheet for Blue Sky Brain Integration
 * 
 * @package BlueSkyBrain
 * @since 1.0.0
 * @copyright 2025 Blue Sky Brain Integration
 */

/* ========================================
   CSS Variables
   ======================================== */
:root {
    /* Colors */
    --color-primary: #4A90E2;
    --color-primary-dark: #357ABD;
    --color-secondary: #50C878;
    --color-accent: #FFB347;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #FFFFFF;
    --color-bg-light: #F8F9FA;
    --color-bg-dark: #2C3E50;
    --color-border: #E0E0E0;
    
    /* Typography */
    --font-primary: 'Open Sans', sans-serif;
    --font-heading: 'Montserrat', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-bg);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

a:hover {
    color: var(--color-primary-dark);
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   Container & Layout
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.site {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-content {
    flex: 1;
}

/* ========================================
   Header Styles
   ======================================== */
.site-header {
    background: var(--color-bg);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    background: var(--color-bg-dark);
    color: #fff;
    padding: var(--spacing-xs) 0;
    font-size: 0.875rem;
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-contact-info {
    display: flex;
    gap: var(--spacing-md);
}

.header-phone,
.header-email {
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-phone:hover,
.header-email:hover {
    color: var(--color-accent);
}

.header-main {
    padding: var(--spacing-sm) 0;
}

.header-main .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-branding {
    flex: 0 0 auto;
}

.site-branding .content-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0;
}

.site-branding .content-col {
    flex: 0 0 auto;
}

.site-branding .content-col:first-child {
    display: flex;
    align-items: center;
}

.site-branding .image-placeholder {
    height: 60px;
    display: flex;
    align-items: center;
}

.site-branding .image-placeholder img {
    max-height: 60px;
    width: auto;
    height: auto;
    object-fit: contain;
}

.site-title {
    margin: 0;
    font-size: 1.75rem;
}

.site-title a {
    color: var(--color-primary);
    text-decoration: none;
}

.site-description {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin: 0;
}

/* ========================================
   Navigation
   ======================================== */
.main-navigation {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.main-navigation ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
    margin: 0;
    padding: 0;
}

.main-navigation a {
    color: var(--color-text);
    font-weight: 600;
    padding: 0.5rem 1rem;
    display: block;
    transition: var(--transition);
}

.main-navigation a:hover {
    color: var(--color-primary);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    flex-direction: column;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    display: block;
    transition: var(--transition);
}

/* ========================================
   Social Links
   ======================================== */
.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: #fff;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

/* ========================================
   Hero Section
   ======================================== */
.hero-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    padding: var(--spacing-xl) 0;
}

.hero-section .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-headline {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    color: #fff;
}

.hero-subheadline {
    font-size: 1.75rem;
    font-weight: 400;
    margin-bottom: var(--spacing-md);
    color: rgba(255,255,255,0.9);
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: rgba(255,255,255,0.85);
}

.hero-logo-row {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.hero-logo-col {
    flex: 0 0 auto;
}

.hero-text-col {
    flex: 1 1 auto;
    min-width: 0;
}

.hero-section .image-logo {
    height: 240px;
    max-width: 240px;
    display: flex;
    align-items: center;
}

.hero-section .image-logo img {
    max-height: 240px;
    max-width: 240px;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* ========================================
   Home Videos Section
   ======================================== */
.home-videos-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.home-videos-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

@media (max-width: 768px) {
    .home-videos-grid {
        grid-template-columns: 1fr;
    }
}

.home-video-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.home-video-card .video-wrapper {
    border-radius: 0;
    box-shadow: none;
}

.home-video-content {
    padding: var(--spacing-md);
}

.home-video-title {
    margin-bottom: var(--spacing-xs);
}

.home-video-author {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
}

.home-video-desc {
    margin-bottom: 0;
    color: var(--color-text-light);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: var(--font-heading);
}

.btn-primary {
    background: var(--color-secondary);
    color: #fff;
}

.btn-primary:hover {
    background: #45B567;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-accent);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: #FFA533;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* ========================================
   Content Sections
   ======================================== */
section {
    padding: var(--spacing-xl) 0;
}

.section-intro {
    font-size: 1.125rem;
    color: var(--color-text-light);
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-md);
}

.what-is-bit-section {
    background: var(--color-bg-light);
}

.what-is-bit-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.benefit-item i {
    color: var(--color-secondary);
    font-size: 1.5rem;
}

/* ========================================
   Services Section
   ======================================== */
.services-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.service-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.service-title {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.service-benefits {
    list-style: none;
    text-align: left;
    margin-top: var(--spacing-sm);
}

.service-benefits li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

.service-benefits li:last-child {
    border-bottom: none;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ========================================
   Conditions Section
   ======================================== */
.conditions-section {
    background: var(--color-bg-light);
}

.conditions-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.conditions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.condition-category {
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.condition-category h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary);
}

.condition-category ul {
    list-style: none;
}

.condition-category li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.condition-category li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: bold;
}

/* ========================================
   Testimonials Section
   ======================================== */
.testimonials-section {
    background: var(--color-bg-light);
}

.testimonials-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.testimonial-card {
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.testimonial-rating {
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.testimonial-text {
    font-style: italic;
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.testimonial-author {
    font-weight: 600;
    color: var(--color-text-light);
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.cta-section h2 {
    color: #fff;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.cta-section p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: rgba(255,255,255,0.9);
}

/* ========================================
   FAQ Section
   ======================================== */
.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-md);
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--color-bg-light);
}

.faq-question i {
    transition: var(--transition);
}

.faq-question[aria-expanded="true"] i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;

}

.faq-question[aria-expanded="true"] + .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--color-text-light);
}

.faq-section ul {
    list-style: disc;
    padding-left: 3rem;
    margin-left: 1rem;
}

.faq-section li {
    padding: 0.5rem 0;
    color: var(--color-text);
}

/* ========================================
   Contact Page
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.required {
    color: red;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.contact-info-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-bg-light);
    border-radius: var(--radius-sm);
}

.contact-info-item i {
    font-size: 1.5rem;
    color: var(--color-primary);
    width: 40px;
    text-align: center;
}

.contact-info-item h3 {
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

/* ========================================
   Page Header
   ======================================== */
.page-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    padding: var(--spacing-sm) 0;
    text-align: center;
}

.page-header h1 {
    color: #fff;
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.page-intro {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.9);
}

/* ========================================
   About Page
   ======================================== */
.content-row {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.content-row.reverse {
    flex-direction: row-reverse;
}

.content-col {
    flex: 1;
}

.content-col .image-placeholder {
    width: 100%;
}

.content-col .image-placeholder img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* About Marla specific styling */
.about-marla .content-col:first-child {
    flex: 0 0 300px;
    max-width: 300px;
}

.about-marla .content-col:first-child .image-placeholder img {
    max-height: 400px;
    width: 100%;
    object-fit: cover;
}

.about-marla .content-col:last-child {
    flex: 1;
}

/* Compact layout for Mission / Approach / Commitment grouped together */
.about-topics {
    padding: var(--spacing-md) 0; /* compact vertical spacing */
}
.about-topics .container {
    display: block; /* always stacked rows */
}
.about-topics .about-topic {
    margin-bottom: var(--spacing-sm);
}
.about-topics .about-topic h2 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.25rem;
}
.about-topics .about-topic:last-child {
    margin-bottom: 0;
}

/* Tighten vertical spacing between About sections */
.about-marla,
.about-topics,
.about-bit-details {
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.about-marla { padding-bottom: calc(var(--spacing-sm) / 2); }
.about-topics { padding-top: calc(var(--spacing-sm) / 2); }

.about-topics + .about-bit-details {
    margin-top: var(--spacing-xs);
}

/* BIT Publications & Interviews styling */
.bit-publication-title,
.bit-interview-text {
    font-size: 1rem;
    position: relative;
    padding-left: 1.5rem;
}

.bit-publication-title::before,
.bit-interview-text::before {
    content: "•";
    position: absolute;
    left: 0;
    font-size: 1.5rem;
    font-weight: bold;
    line-height: 1;
}

/* Responsive layout for about sections */
@media (max-width: 768px) {
    .content-row {
        flex-direction: column;
    }
    
    .content-row.reverse {
        flex-direction: column;
    }
    
    .about-marla .content-col:first-child {
        flex: 1;
        max-width: 100%;
    }
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
    background: var(--color-bg-dark);
    color: rgba(255,255,255,0.8);
    margin-top: auto;
}

.footer-main {
    padding: var(--spacing-xl) 0;
}

.footer-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.footer-widget-area h3 {
    color: #fff;
    margin-bottom: var(--spacing-md);
}

.footer-widget-area ul {
    list-style: none;
}

.footer-widget-area a {
    color: rgba(255,255,255,0.8);
    display: block;
    padding: 0.5rem 0;
}

.footer-widget-area a:hover {
    color: var(--color-accent);
}

.contact-info {
    list-style: none;
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.contact-info i {
    color: var(--color-primary);
    width: 20px;
}

.footer-bottom {
    background: rgba(0,0,0,0.2);
    padding: var(--spacing-md) 0;
    text-align: center;
}

.footer-disclaimer {
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 992px) {
    .header-top .container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-navigation {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        box-shadow: var(--shadow-md);
    }
    
    .main-navigation.active {
        display: block;
    }
    
    .main-navigation ul {
        flex-direction: column;
        gap: 0;
    }
    
    .main-navigation a {
        padding: var(--spacing-sm) var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
    }
    
    .hero-section .container {
        grid-template-columns: 1fr;
    }
    
    .hero-headline {
        font-size: 2rem;
    }
    
    .hero-subheadline {
        font-size: 1.25rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .services-grid,
    .conditions-grid,
    .testimonials-slider {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Accessibility
   ======================================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: #fff;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

.screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    position: absolute !important;
    height: 1px;
    width: 1px;
    overflow: hidden;
}

/* ========================================
   Office Image Section
   ======================================== */
.office-image-section {
    margin: var(--spacing-md) 0;
    text-align: center;
}

.office-image {
    max-width: 400px;
    width: 100%;
    height: auto;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
    .office-image {
        max-width: 100%;
    }
}

/* ========================================
   Services Detail Page
   ======================================== */
.service-detail {
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-sm);
}

.service-detail:first-child {
    padding-top: 0;
}

.service-detail:last-child {
    margin-bottom: 0;
}

.first-session-section {
    border-top: 2px solid var(--color-border);
    padding-top: var(--spacing-lg);
}

.service-title-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.service-title-wrapper .service-icon {
    flex-shrink: 0;
    color: var(--color-primary);
    font-size: 1.5rem;
}

.service-title-wrapper h2 {
    margin-bottom: 0;
}

.helps-with-list {
    list-style: none;
    padding-left: 0;
}

.helps-with-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.25rem 0;
}

.helps-with-list li i {
    color: var(--color-secondary);
    font-size: 1.125rem;
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }