/* ============================================
   OPEN SOURCE TACTICIAN - STYLE SYSTEM
   Offensive AI Security Theme
   ============================================ */

/* CSS Variables */
:root {
    /* Primary Colors - Tactical Dark Theme */
    --bg-primary: #0a0d10;
    --bg-secondary: #0f1419;
    --bg-tertiary: #161d24;
    --bg-card: #121920;

    /* Accent Colors - OST Brand Cyan/Gold Theme */
    --accent-primary: #2b9ac7;
    --accent-secondary: #2589b3;
    --accent-tertiary: #1e7399;
    --accent-gold: #c4a35a;
    --accent-gold-dark: #a68b4b;
    --accent-red: #ff3366;
    --accent-orange: #ff6b35;
    --accent-blue: #2b9ac7;
    --accent-purple: #9d4edd;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b4b4c0;
    --text-muted: #6b6b7a;
    --text-accent: var(--accent-primary);

    /* Terminal Colors */
    --terminal-bg: #0d0d12;
    --terminal-border: #2a2a3a;
    --terminal-red: #ff5f56;
    --terminal-yellow: #ffbd2e;
    --terminal-green: #27c93f;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-gold) 100%);
    --gradient-dark: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    --gradient-glow: radial-gradient(ellipse at center, rgba(43, 154, 199, 0.15) 0%, transparent 70%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Effects */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --shadow-glow: 0 0 30px rgba(43, 154, 199, 0.3);
    --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.5);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 17px;
    overflow-x: hidden;
}

/* Selection */
::selection {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--accent-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--terminal-border);
    padding: var(--spacing-sm) 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-primary);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav-link:hover {
    color: var(--accent-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--accent-primary);
    color: var(--bg-primary) !important;
    border-radius: 4px;
    padding: var(--spacing-xs) var(--spacing-sm) !important;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    background: var(--accent-secondary);
    color: var(--bg-primary) !important;
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--accent-primary);
    transition: var(--transition-normal);
}

/* ============================================
   HERO SECTION - ENHANCED WITH AI/CYBER ANIMATIONS
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
    background: radial-gradient(ellipse at center, rgba(43, 154, 199, 0.05) 0%, transparent 70%),
                linear-gradient(180deg, var(--bg-primary) 0%, #050708 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

/* Matrix Rain Canvas */
#matrix-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.15;
    z-index: 1;
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(43, 154, 199, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(43, 154, 199, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.5;
    animation: gridMove 20s linear infinite;
    z-index: 2;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

/* Cyber Particles */
.cyber-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 3;
}

.cyber-particles::before,
.cyber-particles::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--accent-primary);
    box-shadow:
        20px 50px var(--accent-primary),
        100px 150px var(--accent-gold),
        200px 80px var(--accent-primary),
        300px 200px var(--accent-gold),
        400px 120px var(--accent-primary),
        500px 250px var(--accent-gold),
        600px 180px var(--accent-primary),
        700px 100px var(--accent-gold);
    animation: floatParticles 15s linear infinite;
}

.cyber-particles::after {
    animation-delay: 7.5s;
    animation-direction: reverse;
}

@keyframes floatParticles {
    0% { transform: translateY(100vh) translateX(-100px); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-100vh) translateX(100px); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: var(--spacing-lg);
    max-width: 1200px;
    width: 100%;
}

/* Enhanced Terminal Window for Hero */
.terminal-window {
    background: var(--terminal-bg);
    border: 1px solid var(--terminal-border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.hero-terminal {
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
    animation: slideInFromTop 0.8s ease-out;
    backdrop-filter: blur(10px);
    background: rgba(13, 13, 18, 0.9);
    border: 1px solid rgba(43, 154, 199, 0.3);
    box-shadow: 0 0 40px rgba(43, 154, 199, 0.2);
}

@keyframes slideInFromTop {
    0% {
        opacity: 0;
        transform: translateY(-50px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.terminal-header {
    background: var(--bg-tertiary);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--terminal-border);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot.red { background: var(--terminal-red); }
.terminal-dot.yellow { background: var(--terminal-yellow); }
.terminal-dot.green { background: var(--terminal-green); }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: auto;
}

.terminal-body {
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-align: left;
}

.terminal-body p {
    margin-bottom: var(--spacing-xs);
}

.prompt {
    color: var(--accent-primary);
}

.command {
    color: var(--text-primary);
}

.output {
    color: var(--text-secondary);
    padding-left: 1rem;
}

/* Terminal Typing Effects */
.terminal-line {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.typing-effect {
    overflow: hidden;
    white-space: nowrap;
    animation: typing 2s steps(40, end);
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

.cursor {
    animation: blink 1s infinite;
    color: var(--accent-primary);
    font-weight: bold;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Terminal Output Colors */
.terminal-output {
    margin-top: var(--spacing-sm);
}

.terminal-output p {
    margin: 0.5rem 0;
    padding-left: 1rem;
    opacity: 0;
    animation: fadeInLine 0.5s ease-out forwards;
}

.terminal-output p:nth-child(1) { animation-delay: 2.5s; }
.terminal-output p:nth-child(2) { animation-delay: 2.7s; }
.terminal-output p:nth-child(3) { animation-delay: 2.9s; }
.terminal-output p:nth-child(4) { animation-delay: 3.1s; }

@keyframes fadeInLine {
    0% {
        opacity: 0;
        transform: translateX(-20px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

.success-text { color: #27c93f; }
.warning-text { color: #ffbd2e; }
.info-text { color: var(--accent-primary); }
.alert-text { color: var(--accent-orange); }

/* Hero Main Content */
.hero-main {
    margin-top: var(--spacing-lg);
    animation: fadeInUp 1s ease-out 0.5s both;
}

/* Hero Title Text */
.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-transform: uppercase;
    letter-spacing: 3px;
    animation: heroTitleGlow 3s ease-in-out infinite alternate;
    text-shadow: 0 0 80px rgba(43, 154, 199, 0.5);
}

@keyframes heroTitleGlow {
    0% {
        filter: brightness(1) drop-shadow(0 0 20px rgba(43, 154, 199, 0.5));
    }
    100% {
        filter: brightness(1.2) drop-shadow(0 0 40px rgba(196, 163, 90, 0.6));
    }
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Enhanced Hero Logo with Multiple Effects */
.hero-logo {
    margin-bottom: var(--spacing-md);
    position: relative;
    perspective: 1000px;
}

.logo-container {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 0 auto;
    transform-style: preserve-3d;
    animation: float3D 6s ease-in-out infinite;
}

@keyframes float3D {
    0%, 100% { transform: translateY(0) rotateX(0deg) rotateY(0deg); }
    25% { transform: translateY(-10px) rotateX(2deg) rotateY(5deg); }
    50% { transform: translateY(0) rotateX(-2deg) rotateY(-5deg); }
    75% { transform: translateY(-10px) rotateX(2deg) rotateY(-5deg); }
}

.hero-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    position: relative;
    z-index: 10;
    filter: drop-shadow(0 0 30px rgba(43, 154, 199, 0.5));
    transition: all 0.3s ease;
}

.logo-container:hover .hero-logo-img {
    transform: scale(1.05) rotateZ(360deg);
    filter: drop-shadow(0 0 50px rgba(43, 154, 199, 0.8))
            drop-shadow(0 0 100px rgba(196, 163, 90, 0.4));
    transition: all 0.5s ease;
}

/* Advanced Glitch Effect */
.glitch-effect {
    animation: advancedGlitch 8s infinite;
}

@keyframes advancedGlitch {
    0%, 100% {
        filter: drop-shadow(0 0 30px rgba(43, 154, 199, 0.5));
        transform: translate(0);
    }
    92% {
        filter: drop-shadow(0 0 30px rgba(43, 154, 199, 0.5));
        transform: translate(0);
    }
    93% {
        filter: drop-shadow(2px 2px 0 rgba(255, 0, 0, 1))
               drop-shadow(-2px -2px 0 rgba(0, 255, 255, 1));
        transform: translateX(2px);
    }
    94% {
        filter: drop-shadow(-2px 2px 0 rgba(255, 255, 0, 1))
               drop-shadow(2px -2px 0 rgba(255, 0, 255, 1));
        transform: translateX(-2px) scaleX(0.98);
    }
    95% {
        filter: drop-shadow(0 0 10px rgba(255, 0, 0, 0.8))
               contrast(2) brightness(1.5);
        transform: translateX(1px) translateY(-1px);
    }
    96% {
        filter: drop-shadow(0 0 30px rgba(43, 154, 199, 0.5))
               hue-rotate(90deg);
        transform: translate(0);
    }
    97% {
        filter: drop-shadow(0 0 30px rgba(43, 154, 199, 0.5));
        transform: translate(0);
    }
}

/* Holographic Layer */
.holographic-layer {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(43, 154, 199, 0.1) 50%,
        transparent 70%
    );
    animation: holographicSweep 3s linear infinite;
    z-index: 15;
    pointer-events: none;
    mix-blend-mode: screen;
}

@keyframes holographicSweep {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Scanning Lines Effect */
.scan-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(43, 154, 199, 0.03) 2px,
        rgba(43, 154, 199, 0.03) 4px
    );
    animation: scanlines 8s linear infinite;
    z-index: 12;
    pointer-events: none;
}

@keyframes scanlines {
    0% { transform: translateY(0); }
    100% { transform: translateY(10px); }
}

/* Electromagnetic Field Effect */
.electromagnetic-field {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    transform: translate(-50%, -50%);
    z-index: 5;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.logo-container:hover .electromagnetic-field {
    opacity: 1;
}

.electromagnetic-field::before,
.electromagnetic-field::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    border: 1px solid;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: electromagneticPulse 1.5s linear infinite;
}

.electromagnetic-field::before {
    border-color: rgba(43, 154, 199, 0.5);
    animation-delay: 0s;
}

.electromagnetic-field::after {
    border-color: rgba(196, 163, 90, 0.5);
    animation-delay: 0.75s;
}

@keyframes electromagneticPulse {
    0% {
        width: 0%;
        height: 0%;
        opacity: 1;
    }
    100% {
        width: 150%;
        height: 150%;
        opacity: 0;
    }
}

/* Particle Effects */
.logo-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 20;
    pointer-events: none;
}

.logo-particles::before,
.logo-particles::after {
    content: '';
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 50%;
    opacity: 0;
    animation: particleOrbit 4s linear infinite;
}

.logo-particles::before {
    box-shadow:
        0 0 10px var(--accent-primary),
        50px 50px 0 var(--accent-gold),
        -50px 50px 0 var(--accent-primary),
        50px -50px 0 var(--accent-gold),
        -50px -50px 0 var(--accent-primary);
}

.logo-particles::after {
    animation-delay: 2s;
    box-shadow:
        0 0 10px var(--accent-gold),
        70px 0 0 var(--accent-primary),
        0 70px 0 var(--accent-gold),
        -70px 0 0 var(--accent-primary),
        0 -70px 0 var(--accent-gold);
}

.logo-container:hover .logo-particles::before,
.logo-container:hover .logo-particles::after {
    opacity: 1;
}

@keyframes particleOrbit {
    0% {
        transform: rotate(0deg) translateX(100px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: rotate(360deg) translateX(100px) rotate(-360deg);
        opacity: 0;
    }
}

.hero-slogan {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    color: var(--accent-gold);
    margin-bottom: var(--spacing-md);
    letter-spacing: 1px;
    animation: fadeIn 1s ease-out 1s both;
}

.hero-slogan em {
    font-style: italic;
    font-weight: 500;
}

/* Dynamic Typing Tagline */
.hero-tagline-container {
    font-size: 1.4rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    height: 2em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tagline-static {
    color: var(--text-secondary);
}

.tagline-dynamic {
    color: var(--accent-primary);
    font-family: var(--font-mono);
    font-weight: 600;
    min-width: 250px;
    text-align: left;
}

.typing-cursor {
    animation: blink 1s infinite;
    color: var(--accent-primary);
    font-weight: 300;
}

/* Animated Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    flex-wrap: wrap;
    animation: slideInFromBottom 1s ease-out 1.5s both;
}

@keyframes slideInFromBottom {
    0% {
        opacity: 0;
        transform: translateY(50px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-stats .stat-item {
    text-align: center;
    padding: var(--spacing-sm);
    border-left: 2px solid var(--accent-tertiary);
    min-width: 150px;
}

.hero-stats .stat-item:first-child {
    border-left: none;
}

.hero-stats .stat-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-stats .stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* CTA Buttons */
.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 4px;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--terminal-border);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1rem;
}

.btn-arrow {
    font-size: 1.2rem;
}

/* Enhanced CTA Buttons */
.btn-text {
    margin-right: 0.5rem;
}

.btn-icon {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
    vertical-align: middle;
    margin-left: 0.25rem;
}

.btn:hover .btn-icon {
    transform: translateX(3px);
}

.btn-arrow-icon {
    width: 14px;
    height: 14px;
    margin-left: 0.5rem;
    vertical-align: middle;
    transition: transform var(--transition-fast);
}

.btn:hover .btn-arrow-icon {
    transform: translate(2px, -2px);
}

.pulse-glow {
    position: relative;
    overflow: hidden;
}

.pulse-glow::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    opacity: 0;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.2); }
}

/* Neural Network Visualization */
.neural-network {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.1;
    z-index: 0;
}

.network-svg {
    width: 100%;
    height: 100%;
}

.neuron {
    fill: var(--accent-primary);
    opacity: 0.6;
    animation: neuronPulse 3s infinite;
}

.neuron:nth-child(odd) {
    animation-delay: 0.5s;
}

.neuron:nth-child(even) {
    animation-delay: 1s;
}

@keyframes neuronPulse {
    0%, 100% { r: 3; opacity: 0.3; }
    50% { r: 5; opacity: 1; }
}

.synapse {
    stroke: var(--accent-primary);
    stroke-width: 0.5;
    opacity: 0.2;
    animation: synapseFlow 2s linear infinite;
}

@keyframes synapseFlow {
    0% { stroke-dashoffset: 0; }
    100% { stroke-dashoffset: -20; }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-arrow {
    width: 20px;
    height: 30px;
    border: 2px solid var(--text-muted);
    border-radius: 10px;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    width: 4px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 2px;
    transform: translateX(-50%);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(8px); opacity: 0.5; }
}

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

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

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--accent-primary);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    background: var(--bg-secondary);
    position: relative;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image {
    position: relative;
}

.image-frame {
    position: relative;
    width: 280px;
    height: 280px;
    margin: 0 auto;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid var(--accent-primary);
    box-shadow: 0 0 30px rgba(43, 154, 199, 0.3);
}

.profile-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-normal);
}

.image-frame:hover .profile-photo {
    transform: scale(1.05);
}

.image-border {
    display: none;
}

.status-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--accent-primary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
}

.about-content {
    position: relative;
    z-index: 1;
}

.about-name {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.about-title {
    font-family: var(--font-mono);
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.about-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.badge-military {
    background: rgba(255, 107, 53, 0.2);
    color: var(--accent-orange);
    border: 1px solid var(--accent-orange);
}

.badge-sans {
    background: rgba(0, 180, 216, 0.2);
    color: var(--accent-blue);
    border: 1px solid var(--accent-blue);
}

.badge-cert {
    background: rgba(157, 78, 221, 0.2);
    color: var(--accent-purple);
    border: 1px solid var(--accent-purple);
}

.about-text {
    margin-bottom: var(--spacing-md);
}

.about-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.about-text strong {
    color: var(--accent-primary);
}

.about-stats {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--terminal-border);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================
   SEC535 SECTION
   ============================================ */
.sec535 {
    background: var(--bg-primary);
    position: relative;
}

.course-showcase {
    max-width: 1000px;
    margin: 0 auto;
}

.course-hero {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--terminal-border);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
    border-top: 3px solid var(--accent-primary);
}

.course-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.sans-badge {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent-gold);
    background: rgba(196, 163, 90, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: 1px solid var(--accent-gold);
    letter-spacing: 2px;
}

.course-code {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.course-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.course-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
}

.course-meta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

.meta-icon {
    width: 18px;
    height: 18px;
    stroke: var(--accent-primary);
    flex-shrink: 0;
}

/* Course Detail Cards */
.course-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.detail-card {
    background: var(--bg-card);
    border: 1px solid var(--terminal-border);
    border-radius: 8px;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
}

.detail-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.card-icon-svg {
    width: 40px;
    height: 40px;
    margin-bottom: var(--spacing-sm);
    stroke: var(--accent-primary);
    display: block;
}

.detail-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.detail-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.course-cta {
    text-align: center;
}

/* ============================================
   EXPERTISE SECTION
   ============================================ */
.expertise {
    background: var(--bg-secondary);
}

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

.expertise-card {
    background: var(--bg-card);
    border: 1px solid var(--terminal-border);
    border-radius: 8px;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
}

.expertise-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 30px rgba(43, 154, 199, 0.1);
}

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

.card-icon-wrapper {
    width: 50px;
    height: 50px;
    background: rgba(43, 154, 199, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon-wrapper svg {
    width: 24px;
    height: 24px;
    stroke: var(--accent-primary);
}

.expertise-card h3 {
    font-size: 1.25rem;
}

.expertise-card > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.expertise-list {
    list-style: none;
}

.expertise-list li {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--terminal-border);
    position: relative;
    padding-left: 1.5rem;
}

.expertise-list li:last-child {
    border-bottom: none;
}

.expertise-list li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* ============================================
   PUBLICATIONS SECTION
   ============================================ */
.publications {
    background: var(--bg-primary);
}

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

.publication-card {
    background: var(--bg-card);
    border: 1px solid var(--terminal-border);
    border-radius: 8px;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
}

.publication-card:hover {
    border-color: var(--accent-primary);
}

.publication-card.featured {
    grid-column: span 2;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-card) 100%);
    border-color: var(--accent-tertiary);
}

.pub-type {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.publication-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.pub-subtitle {
    color: var(--accent-blue);
    font-style: italic;
    margin-bottom: var(--spacing-sm);
}

.pub-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.pub-meta {
    display: flex;
    gap: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.pub-link {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.pub-link:hover {
    color: var(--accent-secondary);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-content.contact-centered {
    text-align: center;
}

.contact-intro {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-methods {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.contact-method {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--terminal-border);
    border-radius: 8px;
    text-decoration: none;
    transition: all var(--transition-normal);
    min-width: 140px;
}

.contact-method:hover {
    border-color: var(--accent-primary);
}

.method-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.method-value {
    color: var(--accent-primary);
    font-size: 0.9rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--terminal-border);
    padding: var(--spacing-lg) 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-md);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-logo-img {
    height: 60px;
    width: auto;
}

.footer-brand p {
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-primary);
}

.footer-legal {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-slogan {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--accent-gold);
    margin-bottom: var(--spacing-xs);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-badges {
        justify-content: center;
    }

    .about-stats {
        justify-content: center;
    }

    .expertise-grid {
        grid-template-columns: 1fr;
    }

    .publications-grid {
        grid-template-columns: 1fr;
    }

    .publication-card.featured {
        grid-column: span 1;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-normal);
        border-bottom: 1px solid var(--terminal-border);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .course-details {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .course-meta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .terminal-window {
        font-size: 0.8rem;
    }

    .about-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .image-frame {
        width: 200px;
        height: 200px;
    }

    .initials {
        font-size: 3rem;
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.delay-1 { animation-delay: 0.5s; }
.delay-2 { animation-delay: 1s; }
.delay-3 { animation-delay: 1.5s; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal animation targets */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}