/* ===========================
   HABS - About Page Styles
   Brand Book v1.0 - March 2026
   =========================== */

/* ===========================
   CSS Variables - HABS Brand
   =========================== */
:root {
    /* HABS Brand Colors - Dark Mode Native */
    --color-background: #0B0E13;
    --color-surface: #141821;
    --color-surface-elevated: #1C2029;
    --color-primary: #FFFFFF;
    --color-secondary: #9BA3B4;
    --color-tertiary: #6B7280;
    --color-accent: #4A9EFF;
    --color-accent-hover: #3A8EEF;
    --color-border: #252A35;
    --color-border-subtle: #1A1F2A;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-hero: 3.5rem;
    --font-size-h1: 2.75rem;
    --font-size-h2: 2.25rem;
    --font-size-h3: 1.75rem;
    --font-size-h4: 1.25rem;
    --font-size-body: 1rem;
    --font-size-small: 0.875rem;
    --font-size-tiny: 0.75rem;
    
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.7;
    
    /* Spacing */
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* Layout */
    --max-width: 1280px;
    --border-radius: 6px;
    --border-radius-lg: 8px;
    --border-radius-xl: 12px;
    
    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-background);
    color: var(--color-primary);
    line-height: var(--line-height-normal);
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-regular);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-8);
}

/* Navigation styles handled by css/navbar.css, css/dropdown-menu.css, css/mobile-menu.css */

/* ===========================
   Hero Section
   =========================== */
.about-hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-24) 0 var(--spacing-16);
    margin-top: 72px;
    position: relative;
    background: linear-gradient(180deg, 
        rgba(11, 14, 19, 0.95) 0%, 
        rgba(20, 24, 33, 0.98) 100%),
        url('../images/about-hero-background.jpg') center center / cover no-repeat;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 20%, 
        rgba(74, 158, 255, 0.05) 0%, 
        transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 900px;
    text-align: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
}

.hero-label {
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-6);
    opacity: 0.9;
}

.hero-title {
    font-size: var(--font-size-hero);
    font-weight: var(--font-weight-extrabold);
    line-height: var(--line-height-tight);
    letter-spacing: -0.02em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-6);
}

.hero-subtitle {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-regular);
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    max-width: 700px;
    margin: 0 auto;
}

/* ===========================
   Section Common Styles
   =========================== */
section {
    padding: var(--spacing-20) 0;
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section-label {
    display: inline-block;
    font-size: var(--font-size-tiny);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-4);
    opacity: 0.9;
}

.section-title {
    font-size: var(--font-size-h2);
    font-weight: var(--font-weight-extrabold);
    line-height: var(--line-height-tight);
    color: var(--color-primary);
    margin-bottom: var(--spacing-6);
    letter-spacing: -0.01em;
}

.section-header {
    margin-bottom: var(--spacing-12);
}

/* ===========================
   Overview Section
   =========================== */
.overview-section {
    background: var(--color-surface);
}

.content-wrapper {
    max-width: 1100px;
    margin: 0 auto;
}

.content-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--spacing-12);
    align-items: start;
}

.text-content p {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-6);
}

.lead-text {
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary) !important;
    line-height: var(--line-height-relaxed);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
}

.stat-card {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-6);
    text-align: center;
    transition: all var(--transition-medium);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: 0 8px 16px rgba(74, 158, 255, 0.2);
}

.stat-number {
    font-size: 2rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-2);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-medium);
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===========================
   Vision Section
   =========================== */
.vision-section {
    background: var(--color-background);
}

.vision-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.vision-image {
    position: relative;
}

.image-placeholder {
    background: var(--color-surface-elevated);
    border: 2px dashed var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-16) var(--spacing-8);
    text-align: center;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.placeholder-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-4);
    opacity: 0.5;
}

.placeholder-text {
    color: var(--color-tertiary);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-medium);
}

.vision-content p {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-8);
}

.vision-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.highlight-item {
    display: flex;
    gap: var(--spacing-4);
    align-items: flex-start;
}

.highlight-icon {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(74, 158, 255, 0.2);
    flex-shrink: 0;
    margin-top: 6px;
}

.highlight-text h4 {
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-2);
}

.highlight-text p {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    margin: 0;
}

/* ===========================
   Mission Section
   =========================== */
.mission-section {
    background: var(--color-surface);
}

.mission-content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: left;
}

.mission-intro {
    font-size: 1.125rem;
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-16);
    max-width: 800px;
}

.mission-pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
    margin-top: var(--spacing-12);
}

.pillar {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-8);
    text-align: left;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.pillar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--color-accent);
    transition: height var(--transition-medium);
}

.pillar:hover::before {
    height: 100%;
}

.pillar:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: 0 12px 24px rgba(74, 158, 255, 0.2);
}

.pillar-number {
    font-size: 2.5rem;
    font-weight: var(--font-weight-extrabold);
    color: rgba(74, 158, 255, 0.2);
    line-height: 1;
    margin-bottom: var(--spacing-4);
}

.pillar-title {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-3);
}

.pillar-description {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-small);
}

/* ===========================
   Why Now Section
   =========================== */
.why-now-section {
    background: var(--color-background);
}

.why-now-content {
    max-width: 1100px;
    margin: 0 auto;
}

.timeline-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
    margin: var(--spacing-12) 0;
}

.timeline-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-6);
    transition: all var(--transition-medium);
}

.timeline-item:hover {
    transform: translateY(-6px);
    border-color: var(--color-accent);
    box-shadow: 0 8px 20px rgba(74, 158, 255, 0.15);
}

.timeline-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-4);
    display: block;
}

.timeline-item h3 {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-3);
}

.timeline-item p {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-small);
}

.convergence-box {
    background: linear-gradient(135deg, 
        rgba(74, 158, 255, 0.1) 0%, 
        rgba(74, 158, 255, 0.05) 100%);
    border: 1px solid var(--color-accent);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-8);
    margin-top: var(--spacing-12);
    text-align: center;
}

.convergence-box h3 {
    font-size: var(--font-size-h3);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-4);
}

.convergence-box p {
    color: var(--color-primary);
    font-size: 1.125rem;
    line-height: var(--line-height-relaxed);
    max-width: 800px;
    margin: 0 auto;
}

/* ===========================
   Positioning Section
   =========================== */
.positioning-section {
    background: var(--color-surface);
}

.positioning-content {
    max-width: 1100px;
    margin: 0 auto;
}

.positioning-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    margin-bottom: var(--spacing-16);
}

.positioning-text p {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-6);
}

.stack-diagram {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.stack-layer {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-6);
    transition: all var(--transition-medium);
}

.stack-layer.habs {
    background: linear-gradient(135deg, 
        rgba(74, 158, 255, 0.15) 0%, 
        rgba(74, 158, 255, 0.05) 100%);
    border-color: var(--color-accent);
    transform: scale(1.05);
}

.stack-layer:hover {
    transform: translateX(8px);
    border-color: var(--color-accent);
}

.layer-label {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-2);
}

.layer-desc {
    font-size: var(--font-size-small);
    color: var(--color-secondary);
}

.offering-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-6);
}

.offering-card {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-6);
    text-align: center;
    transition: all var(--transition-medium);
}

.offering-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: 0 12px 24px rgba(74, 158, 255, 0.2);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-4);
}

.offering-card h3 {
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-3);
}

.offering-card p {
    color: var(--color-secondary);
    font-size: var(--font-size-small);
    line-height: var(--line-height-relaxed);
}

/* ===========================
   Science Section
   =========================== */
.science-section {
    background: var(--color-background);
}

.science-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--spacing-16);
    align-items: center;
}

.science-content p {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-8);
}

.science-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-6);
}

.science-feature {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-6);
    transition: all var(--transition-medium);
}

.science-feature:hover {
    border-color: var(--color-accent);
    background: var(--color-surface-elevated);
    transform: translateX(4px);
}

.feature-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-3);
}

.feature-icon-habs {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid rgba(74, 158, 255, 0.3);
    flex-shrink: 0;
    animation: pulseGlow 2s ease-in-out infinite;
}

.feature-header h4 {
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

.science-feature p {
    color: var(--color-secondary);
    font-size: var(--font-size-small);
    line-height: var(--line-height-relaxed);
    margin: 0;
}

/* ===========================
   Values Section
   =========================== */
.values-section {
    background: var(--color-surface);
}

.values-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-8);
    max-width: 1100px;
    margin: 0 auto;
}

.value-card {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-8);
    position: relative;
    transition: all var(--transition-medium);
    overflow: hidden;
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 100%;
    height: 3px;
    background: var(--color-accent);
    transition: right var(--transition-slow);
}

.value-card:hover::before {
    right: 0;
}

.value-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: 0 16px 32px rgba(74, 158, 255, 0.2);
}

.value-number {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: rgba(74, 158, 255, 0.3);
    margin-bottom: var(--spacing-3);
}

.value-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-4);
    display: block;
}

.value-title {
    font-size: var(--font-size-h3);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-4);
}

.value-description {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-body);
}

/* ===========================
   Status Section
   =========================== */
.status-section {
    background: var(--color-background);
}

.status-content {
    max-width: 1100px;
    margin: 0 auto;
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-12);
    margin: var(--spacing-12) 0;
}

.status-subtitle {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-6);
}

.status-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.status-item {
    display: flex;
    gap: var(--spacing-4);
    align-items: flex-start;
    padding: var(--spacing-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: all var(--transition-medium);
}

.status-item:hover {
    border-color: var(--color-accent);
    transform: translateX(4px);
}

.status-icon {
    color: var(--color-accent);
    font-weight: var(--font-weight-bold);
    font-size: 1.125rem;
    flex-shrink: 0;
}

.status-item p {
    color: var(--color-secondary);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-small);
    margin: 0;
}

.status-item strong {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.status-cta {
    background: linear-gradient(135deg, 
        rgba(74, 158, 255, 0.1) 0%, 
        rgba(74, 158, 255, 0.05) 100%);
    border: 1px solid var(--color-accent);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-12);
    margin-top: var(--spacing-16);
    text-align: center;
}

.status-cta h3 {
    font-size: var(--font-size-h3);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-4);
}

.status-cta p {
    color: var(--color-secondary);
    font-size: 1.125rem;
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-8);
}

.cta-button {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-body);
    padding: var(--spacing-4) var(--spacing-8);
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: all var(--transition-medium);
    border: 2px solid var(--color-accent);
}

.cta-button:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(74, 158, 255, 0.3);
}

/* Footer styles moved to css/footer.css */

/* ===========================
   Animations
   =========================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(74, 158, 255, 0.7);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(74, 158, 255, 0);
    }
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
    .content-grid,
    .vision-grid,
    .positioning-grid,
    .science-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-10);
    }
    
    .mission-pillars {
        grid-template-columns: 1fr;
    }
    
    .timeline-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .offering-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .timeline-grid,
    .offering-cards,
    .values-grid,
    .status-grid {
        grid-template-columns: 1fr;
    }
    
    
    .science-features {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 var(--spacing-4);
    }
}