/* ==========================================================================
   Darkstar Scientific Infrastructure - Visual Identity System (styles.css)
   ========================================================================== */

/* --- Custom Property Definitions --- */
:root {
    /* Color Palette */
    --bg-base: #060913;             /* Deep space / dark navy */
    --bg-surface: #0b1120;          /* Graphite / dark titanium card base */
    --bg-surface-glass: rgba(11, 17, 32, 0.65); /* Semi-transparent card base */
    --bg-header-glass: rgba(6, 9, 19, 0.8);     /* Transparent header base */
    
    /* Accents & Glowing Colors */
    --accent-cyan: #00f0ff;         /* Brilliant telemetry cyan */
    --accent-blue: #58a6ff;         /* Ice blue / primary links */
    --accent-indigo: #388bfd;       /* Solid accent blue */
    --accent-emerald: #39d353;      /* Active state green */
    --accent-gold: #ffc107;         /* Study/warning amber */
    --accent-silver: #c9d1d9;       /* Bright silver text */
    
    /* Borders & Outlines */
    --border-color: rgba(56, 139, 253, 0.15);  /* Subtle blue/cyan border */
    --border-hover: rgba(0, 240, 255, 0.35);   /* Hover cyan border */
    --border-glass: rgba(255, 255, 255, 0.05); /* Soft white highlight */

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
    
    /* Text Colors */
    --text-primary: #f0f6fc;        /* Silver-white high contrast */
    --text-secondary: #8b949e;      /* Muted graphite gray */
    --text-muted: #5d6772;         /* Dark placeholder gray */

    /* Spacing & Sizing */
    --container-max-width: 1380px;
    --grid-gap: 1.5rem;
    --card-radius: 12px;
    --btn-radius: 6px;

    /* Transitions & Animations */
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --glow-cyan: 0 0 15px rgba(0, 240, 255, 0.15);
    --glow-cyan-strong: 0 0 25px rgba(0, 240, 255, 0.3);
}

/* --- Global Resets & Accessibility --- */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-base);
}

body {
    background-color: var(--bg-base);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Accessibility Skip Link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--accent-indigo);
    color: var(--text-primary);
    padding: 10px 20px;
    z-index: 10000;
    transition: top 0.2s;
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    border-radius: 0 0 var(--btn-radius) 0;
}

.skip-link:focus {
    top: 0;
    outline: 2px solid var(--accent-cyan);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-base);
}

::-webkit-scrollbar-thumb {
    background: rgba(88, 166, 255, 0.15);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 240, 255, 0.3);
}

/* --- Section Containers & Layout Layouts --- */
.section-container, .header-container, .hero-container, .trust-container, .footer-container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 6rem 0;
    position: relative;
}

/* --- Navigation & Header Styling --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--bg-header-glass);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition-smooth);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    text-decoration: none;
}

.logo-mark {
    width: 42px;
    height: 42px;
    display: block;
    transition: var(--transition-smooth);
}

.logo:hover .logo-mark {
    transform: rotate(6deg) scale(1.05);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: 0.15em;
    color: var(--text-primary);
    text-shadow: 0 0 8px rgba(240, 246, 252, 0.2);
}

.logo-subtitle {
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.55rem;
    letter-spacing: 0.3em;
    color: var(--accent-cyan);
    margin-top: 2px;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 1.5rem;
}

.nav-menu a, .nav-menu a:visited {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    position: relative;
    padding: 5px 0;
}

.nav-menu a:hover, .nav-menu a:focus {
    color: var(--text-primary);
    outline: none;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-cyan);
    transition: var(--transition-smooth);
}

.nav-menu a:hover::after, .nav-menu a:focus::after {
    width: 100%;
}

.menu-toggle {
    display: none; /* Hidden on desktop */
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1100;
}

.menu-toggle .hamburger,
.menu-toggle::before,
.menu-toggle::after {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-smooth);
}

/* Transform to an 'X' on toggle active */
.menu-toggle[aria-expanded="true"]::before {
    transform: translateY(8px) rotate(45deg);
    background-color: var(--accent-cyan);
}

.menu-toggle[aria-expanded="true"] .hamburger {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"]::after {
    transform: translateY(-8px) rotate(-45deg);
    background-color: var(--accent-cyan);
}

/* --- Common Components (Buttons, Badges) --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: var(--btn-radius);
    transition: var(--transition-smooth);
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background-color: rgba(56, 139, 253, 0.1);
    color: var(--accent-blue);
    border-color: var(--border-color);
    box-shadow: var(--glow-cyan);
}

.btn-primary:hover, .btn-primary:focus {
    background-color: rgba(0, 240, 255, 0.1);
    border-color: var(--accent-cyan);
    color: var(--text-primary);
    box-shadow: var(--glow-cyan-strong);
    outline: none;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-secondary);
    border-color: rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover, .btn-secondary:focus {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    outline: none;
}

.btn-block {
    display: flex;
    width: 100%;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    background-color: rgba(56, 139, 253, 0.05);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 30px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-blue);
    margin-bottom: 2rem;
}

.status-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent-cyan);
    box-shadow: 0 0 8px var(--accent-cyan);
    margin-right: 8px;
}

/* Section Common Headers */
.section-eyebrow {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.25em;
    color: var(--accent-cyan);
    margin-bottom: 0.5rem;
}

h1, h2, h3, h4 {
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2rem;
    margin-top: 0;
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.1rem;
    max-width: 700px;
    margin-top: 0;
    margin-bottom: 3.5rem;
    color: var(--text-secondary);
}

/* --- Glassmorphic Card Styling --- */
.bento-card, .case-card, .skills-category-card, .alignment-card {
    background: var(--bg-surface-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 1.75rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth), transform var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.bento-card:hover, .case-card:hover, .skills-category-card:hover, .alignment-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--glow-cyan);
}

/* Card Header details */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}

.card-category {
    color: var(--accent-blue);
    text-transform: uppercase;
}

.card-status {
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 600;
}

.status-active {
    background-color: rgba(57, 211, 83, 0.1);
    color: var(--accent-emerald);
    border: 1px solid rgba(57, 211, 83, 0.2);
}

.status-learning {
    background-color: rgba(255, 193, 7, 0.1);
    color: var(--accent-gold);
    border: 1px solid rgba(255, 193, 7, 0.2);
}

.status-planned {
    background-color: rgba(139, 148, 158, 0.1);
    color: var(--text-secondary);
    border: 1px solid rgba(139, 148, 158, 0.2);
}

.card-title {
    font-size: 1.25rem;
    margin-top: 0;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.project-card-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.project-card-link:hover {
    color: var(--accent-cyan);
}

.card-body {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    margin-top: 0;
}

.card-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    background-color: rgba(255, 255, 255, 0.03);
    color: var(--accent-silver);
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* --- Bento Grid Foundation --- */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--grid-gap);
    grid-auto-flow: dense;
}

/* Bento Sizing Classes */
.card-large {
    grid-column: span 2;
    grid-row: span 2;
    background: linear-gradient(135deg, rgba(11, 17, 32, 0.8) 0%, rgba(6, 9, 19, 0.6) 100%);
}

.card-medium {
    grid-column: span 2;
}

/* --- Base Layout Sections (Default Viewports) --- */

/* Hero Section */
.hero-section {
    padding-top: 7rem;
    padding-bottom: 4rem;
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    overflow: hidden;
    position: relative;
    background-image: 
        radial-gradient(circle at 75% 50%, rgba(0, 240, 255, 0.08) 0%, transparent 50%), /* Radial glow behind visual panel */
        radial-gradient(circle at 20% 30%, rgba(56, 139, 253, 0.05) 0%, transparent 45%),
        radial-gradient(1px 1px at 15% 15%, #ffffff 100%, transparent),
        radial-gradient(1.5px 1.5px at 45% 25%, #ffffff 80%, transparent),
        radial-gradient(1px 1px at 80% 15%, #ffffff 100%, transparent),
        radial-gradient(1px 1px at 30% 75%, #ffffff 100%, transparent),
        radial-gradient(1.5px 1.5px at 70% 80%, #ffffff 80%, transparent),
        linear-gradient(to right, rgba(56, 139, 253, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(56, 139, 253, 0.03) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 120px 120px, 160px 160px, 200px 200px, 140px 140px, 180px 180px, 48px 40px, 48px 40px;
}

.hero-section::before {
    content: '[ SYS_ACTIVE_CORE: OK ]';
    position: absolute;
    top: 7rem;
    right: 2.5rem;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    border-right: 2px solid var(--accent-cyan);
    padding-right: 6px;
    animation: blink-caret 1s step-end infinite;
    z-index: 2;
}

/* Big subtle orbital circle behind visual panel */
.hero-section::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -80px;
    width: 650px;
    height: 650px;
    border: 1px solid rgba(0, 240, 255, 0.025);
    border-radius: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    z-index: 1;
}

@keyframes blink-caret {
    from, to { border-color: transparent }
    50% { border-color: var(--accent-cyan); }
}

.hero-container {
    display: grid;
    grid-template-columns: 56fr 44fr;
    gap: 4.5rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.35em;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.hero-section h1 {
    font-size: 2.85rem;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-top: 0;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.desktop-only {
    display: inline;
}

.hero-subheadline {
    font-size: 1.15rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-top: 0;
    margin-bottom: 2.25rem;
    max-width: 100%;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.hero-socials {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.social-link, .social-link:visited {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    transition: var(--transition-smooth);
}

.social-link:hover, .social-link:focus {
    color: var(--accent-cyan);
    outline: none;
}

.social-icon {
    font-size: 0.95rem;
    margin-right: 6px;
    color: var(--accent-blue);
}

/* Telemetry Bar Styles */
.hero-telemetry {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    border-top: 1px dashed var(--border-color);
    border-bottom: 1px dashed var(--border-color);
    padding: 0.75rem 0;
    width: 100%;
    margin-top: 1rem;
}

.telemetry-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.telemetry-label {
    color: var(--accent-cyan);
    opacity: 0.8;
}

/* Waveform & Visual Panel Styles */
.hero-visual {
    width: 100%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    position: relative;
}

.scientific-panel {
    width: 100%;
    max-width: 540px;
    aspect-ratio: 900 / 620;
    background: rgba(11, 17, 32, 0.45);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 0.35rem;
    box-shadow: var(--glow-cyan), inset 0 0 20px rgba(0, 240, 255, 0.02);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.scientific-panel:hover {
    border-color: var(--border-hover);
    box-shadow: var(--glow-cyan-strong);
}

.observatory-img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    border-radius: calc(var(--card-radius) - 4px);
    transition: var(--transition-smooth);
}

.scientific-panel:hover .observatory-img {
    transform: scale(1.015);
}

/* Trust Principles Strip */
.trust-strip {
    background-color: rgba(6, 9, 19, 0.5);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 2.25rem 0;
}

.trust-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2rem;
}

.trust-item {
    display: flex;
    flex-direction: column;
}

.trust-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-cyan);
    margin-bottom: 0.5rem;
    opacity: 0.7;
}

.trust-title {
    font-size: 1rem;
    margin: 0 0 0.5rem 0;
    color: var(--text-primary);
}

.trust-desc {
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--text-secondary);
    margin: 0;
}

/* --- Featured Projects Section & Bento Animations --- */
.projects-section {
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.bento-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 1.4rem;
}

.bento-card:hover {
    transform: translateY(-2px);
}

/* --- Case Studies Section --- */
.case-studies-section {
    border-bottom: 1px solid var(--border-color);
    background-image: radial-gradient(circle at 80% 20%, rgba(56, 139, 253, 0.03) 0%, transparent 50%);
}

.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--grid-gap);
}

.case-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.case-content-wrapper {
    display: flex;
    flex-direction: column;
}

.case-bullets {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.case-bullets li {
    font-size: 0.82rem;
    color: var(--text-secondary);
    padding-left: 1rem;
    position: relative;
    line-height: 1.4;
}

.case-bullets li::before {
    content: '▪';
    position: absolute;
    left: 0;
    top: 1px;
    color: var(--accent-cyan);
    font-size: 0.65rem;
}

.case-meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
    opacity: 0.85;
}

.case-card h3 {
    font-size: 1.35rem;
    margin-top: 0;
    margin-bottom: 1rem;
}

.case-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.case-link, .case-link:visited {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-blue);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.case-card:hover .case-link {
    color: var(--accent-cyan);
    transform: translateX(4px);
}

/* --- Technical Skills Section --- */
.skills-section {
    border-bottom: 1px solid var(--border-color);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
}

.skills-category-card {
    display: flex;
    flex-direction: column;
}

.skills-category-card h3 {
    font-size: 1.15rem;
    margin-top: 0;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid rgba(56, 139, 253, 0.1);
    padding-bottom: 0.75rem;
}

.skills-category-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0;
    margin-bottom: 1.25rem;
    line-height: 1.4;
}

.skills-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.skills-list li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 1.25rem;
    position: relative;
}

.skills-list li::before {
    content: '›';
    position: absolute;
    left: 0;
    top: -1px;
    color: var(--accent-cyan);
    font-weight: bold;
    font-size: 1rem;
}

/* Highlight Skill Card */
.highlight-card {
    border-color: rgba(0, 240, 255, 0.25);
    background: linear-gradient(135deg, rgba(11, 17, 32, 0.85) 0%, rgba(0, 240, 255, 0.03) 100%);
    box-shadow: var(--glow-cyan);
}

.highlight-card:hover {
    box-shadow: var(--glow-cyan-strong);
}

/* --- Research Alignment Section --- */
.alignment-section {
    border-bottom: 1px solid var(--border-color);
    background-image: radial-gradient(circle at 10% 80%, rgba(56, 139, 253, 0.03) 0%, transparent 50%);
}

.alignment-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
}

.alignment-card h3 {
    font-size: 1.2rem;
    margin-top: 0;
    margin-bottom: 1rem;
}

.alignment-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.alignment-icon {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--accent-cyan);
}

.alignment-card p {
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.alignment-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 3rem;
}

.alignment-chip {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    background: rgba(56, 139, 253, 0.05);
    border: 1px solid var(--border-color);
    color: var(--accent-blue);
    padding: 5px 12px;
    border-radius: 4px;
    letter-spacing: 0.05em;
    transition: var(--transition-smooth);
    cursor: default;
}

.alignment-chip:hover {
    border-color: var(--border-hover);
    color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.03);
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.1);
}

/* --- About Section --- */
.about-section {
    border-bottom: 1px solid var(--border-color);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr;
    gap: 4rem;
}

.about-content p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.about-philosophy {
    margin-top: 2rem;
    padding-left: 1.5rem;
    border-left: 3px solid var(--accent-cyan);
}

.about-philosophy blockquote {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-style: italic;
    color: var(--text-primary);
}

.about-stats-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: var(--card-radius);
    height: fit-content;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--accent-cyan);
    line-height: 1;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
}

.stat-label {
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    text-transform: uppercase;
}

/* --- Contact Section --- */
.contact-section {
    border-bottom: 1px solid var(--border-color);
    background-image: radial-gradient(circle at 50% 50%, rgba(56, 139, 253, 0.02) 0%, transparent 60%);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 1.25rem;
    margin-top: 0;
    margin-bottom: 1rem;
}

.contact-info p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-top: 0;
    margin-bottom: 2.5rem;
}

.contact-channels {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-channel-item {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    text-decoration: none;
    color: var(--text-secondary);
    padding: 1rem;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    transition: var(--transition-smooth);
}

.contact-channel-item:hover, .contact-channel-item:focus {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background: rgba(56, 139, 253, 0.05);
    outline: none;
}

.channel-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 6px;
    background: rgba(56, 139, 253, 0.1);
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    font-weight: bold;
    font-size: 1.1rem;
}

.contact-channel-item div {
    display: flex;
    flex-direction: column;
}

.contact-channel-item strong {
    font-size: 0.85rem;
    color: var(--text-primary);
}

.contact-channel-item span {
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-cyan);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.form-group input, .form-group textarea {
    background-color: #080d1a;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.85rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    border-radius: var(--btn-radius);
    transition: var(--transition-smooth);
}

.form-group textarea {
    resize: vertical;
}

.form-group input::placeholder, .form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--accent-cyan);
    background-color: #0b1424;
    outline: none;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.1);
}

/* --- Footer Section --- */
.site-footer {
    background-color: #040710;
    border-top: 1px solid var(--border-color);
    padding: 5rem 0 2rem 0;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand .logo-main {
    font-size: 1.15rem;
}

.footer-brand .logo-subtitle {
    font-size: 0.5rem;
}

.footer-tagline {
    font-size: 0.85rem;
    line-height: 1.5;
    margin-top: 1rem;
    max-width: 320px;
    color: var(--text-secondary);
}

.site-footer h4 {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-cyan);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: 0;
    margin-bottom: 1.25rem;
}

.site-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.site-footer a, .site-footer a:visited {
    text-decoration: none;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.site-footer a:hover, .site-footer a:focus {
    color: var(--text-primary);
    outline: none;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    padding-top: 2rem;
    text-align: center;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

/* --- Case Study Long-Form Layouts --- */
.case-study-hero {
    padding-top: 8rem;
    padding-bottom: 4rem;
    background-image: 
        radial-gradient(circle at 50% 50%, rgba(56, 139, 253, 0.05) 0%, transparent 60%),
        linear-gradient(to right, rgba(56, 139, 253, 0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(56, 139, 253, 0.02) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 48px 40px, 48px 40px;
    border-bottom: 1px solid var(--border-color);
}

.case-study-hero-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.case-study-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.25em;
    color: var(--accent-cyan);
    display: block;
    margin-bottom: 1rem;
    text-shadow: 0 0 8px rgba(0, 240, 255, 0.2);
}

.case-study-hero h1 {
    font-size: 3rem;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-top: 0;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.case-study-hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0 0 2rem 0;
    max-width: 820px;
}

.status-chips-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.status-chip {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    background: rgba(56, 139, 253, 0.05);
    border: 1px solid var(--border-color);
    color: var(--accent-blue);
    padding: 4px 12px;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.case-study-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem 1.5rem;
}

.case-study-container section {
    padding: 2rem 0;
    position: relative;
}

/* Limit line length for text blocks to preserve readability, but allow cards/diagrams to span fully */
.case-study-container p,
.case-study-container h2,
.case-study-container h3,
.case-study-container ul:not(.case-study-grid-list):not(.case-bullets),
.case-study-container ol {
    max-width: 820px;
}

.case-study-container h2 {
    font-size: 1.75rem;
    margin-top: 0;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid rgba(56, 139, 253, 0.1);
    padding-bottom: 0.5rem;
    color: var(--text-primary);
}

.case-study-container h2:first-of-type {
    margin-top: 0;
}

.case-study-container h3 {
    font-size: 1.25rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.case-study-container p {
    font-size: 1.02rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.case-study-container ul, .case-study-container ol {
    margin-top: 0;
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.case-study-container li {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.case-study-grid-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--grid-gap);
    margin: 2.5rem 0;
}

.case-study-3col {
    grid-template-columns: repeat(3, 1fr);
}

.case-study-grid-card {
    background: rgba(11, 17, 32, 0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 1.5rem;
}

.case-study-grid-card h4 {
    font-size: 1.15rem;
    margin-top: 0;
    margin-bottom: 0.75rem;
    color: var(--accent-cyan);
}

.case-study-grid-card p {
    font-size: 0.92rem;
    line-height: 1.5;
    margin: 0;
}

/* Callout Box */
.case-study-callout {
    background: linear-gradient(135deg, rgba(11, 17, 32, 0.7) 0%, rgba(56, 139, 253, 0.03) 100%);
    border-left: 3px solid var(--accent-cyan);
    border-radius: 0 var(--card-radius) var(--card-radius) 0;
    padding: 1.75rem;
    margin: 2.5rem 0;
}

.case-study-callout h4 {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--accent-cyan);
    margin-top: 0;
    margin-bottom: 0.75rem;
    letter-spacing: 0.05em;
}

.case-study-callout p {
    font-size: 0.98rem;
    line-height: 1.6;
    margin: 0;
}

/* Interactive SVG Topology Diagram */
.architecture-diagram-container {
    width: 100%;
    background: rgba(11, 17, 32, 0.45);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 2.5rem 2rem;
    margin: 2.5rem 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.architecture-svg {
    width: 100%;
    height: auto;
    display: block;
}

.diagram-node {
    fill: #060913;
    stroke: var(--border-color);
    stroke-width: 1.5;
}

.diagram-node-highlight {
    stroke: var(--accent-cyan);
    fill: #0a1120;
    filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.15));
}

.diagram-text {
    font-family: var(--font-mono);
    font-size: 11px;
    fill: var(--text-primary);
    text-anchor: middle;
}

.diagram-text-subtitle {
    font-size: 9px;
    fill: var(--text-secondary);
}

.diagram-arrow {
    stroke: var(--accent-blue);
    stroke-width: 1.5;
    fill: none;
    marker-end: url(#arrowhead);
}

.diagram-arrow-dashed {
    stroke: var(--accent-indigo);
    stroke-width: 1.5;
    stroke-dasharray: 4 4;
    fill: none;
    marker-end: url(#arrowhead);
}

/* --- Case Study Bottom Navigation --- */
.case-study-navigation {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    margin-top: 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.case-study-nav-back {
    display: flex;
    align-items: center;
}

.case-study-nav-sequence {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.back-link, .back-link:visited {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-blue);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-smooth);
}

.back-link:hover, .back-link:focus {
    color: var(--accent-cyan);
    outline: none;
}

/* Link transitions and icons */
.case-study-navigation a, .case-study-navigation a:visited {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--accent-blue);
    text-decoration: none;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.case-study-navigation a:hover, .case-study-navigation a:focus {
    color: var(--accent-cyan);
    outline: none;
}

.case-study-nav-back a:hover {
    transform: translateX(-4px);
}

.case-study-nav-prev-link:hover {
    transform: translateX(-4px);
}

.case-study-nav-next-link:hover {
    transform: translateX(4px);
}

/* --- Responsive Foundations & Breakpoints --- */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1.1fr 1fr;
        gap: 2rem;
    }
    .bento-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .card-large {
        grid-column: span 2;
        grid-row: span 1;
    }
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .alignment-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .case-studies-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .trust-container {
        grid-template-columns: repeat(3, 1fr);
    }
    .about-grid, .contact-grid {
        gap: 3rem;
    }
    .footer-container {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    section {
        padding: 4rem 0;
    }
    .logo-mark {
        width: 36px;
        height: 36px;
    }
    .hero-section {
        min-height: auto;
        padding-top: 6.5rem;
        padding-bottom: 4rem;
    }
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3.5rem;
    }
    .hero-visual {
        justify-content: center;
    }
    .scientific-panel {
        max-width: 380px;
    }
    .desktop-only {
        display: none;
    }
    .menu-toggle {
        display: flex;
    }
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        max-width: 280px;
        height: 100vh;
        background-color: rgba(6, 9, 19, 0.98);
        border-left: 1px solid var(--border-color);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 6rem 2rem 2rem 2rem;
        transition: right var(--transition-smooth);
        z-index: 1050;
    }
    .nav-menu.is-active {
        right: 0;
    }
    .nav-menu ul {
        flex-direction: column;
        gap: 1.5rem;
    }
    .nav-menu a {
        font-size: 1.05rem;
        display: block;
        padding: 8px 0;
    }
    .bento-grid, .skills-grid, .alignment-grid, .case-studies-grid, .case-study-grid-list {
        grid-template-columns: 1fr;
    }
    .card-large, .card-medium {
        grid-column: span 1;
    }
    .trust-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    .about-stats-card {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: space-around;
        padding: 1.5rem;
    }
    .hero-section h1 {
        font-size: 2.5rem;
    }
    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .footer-brand {
        grid-column: span 1;
    }
    .case-study-navigation {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1.25rem;
        text-align: center;
    }
    .case-study-nav-back, .case-study-nav-sequence {
        justify-content: center;
        text-align: center;
        width: 100%;
    }
    .case-study-nav-sequence {
        display: flex;
        flex-direction: row;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .trust-container {
        grid-template-columns: 1fr;
    }
    .about-stats-card {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    .btn {
        width: 100%;
    }
}

/* --- High Visibility Focus States for Accessibility --- */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--accent-cyan) !important;
    outline-offset: 4px;
}

/* --- Reduced Motion Preferences --- */
@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-delay: -1ms !important;
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        background-attachment: initial !important;
        scroll-behavior: auto !important;
        transition-duration: 0s !important;
        transition-delay: 0s !important;
    }
    .hero-visual {
        animation: none !important;
    }
    .visual-node {
        animation: none !important;
    }
}