/* Modern AI Security Portfolio - Theme Variables */
:root {
    /* Dark Theme Core */
    --bg-color: #0a192f;
    --bg-secondary: #112240;
    --text-primary: #ccd6f6;
    --text-secondary: #8892b0;
    --accent-color: #64ffda;
    /* Neon Cyan/Green */
    --accent-glow: rgba(100, 255, 218, 0.1);

    /* Dynamic UI Elements */
    --card-bg: rgba(17, 34, 64, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --card-hover-border: var(--accent-color);
    --glass-blur: blur(10px);

    /* Utilities */
    --transition-fast: all 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);
    --transition-medium: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
    --font-heading: 'Calibre', 'Inter', 'San Francisco', 'SF Pro Text', -apple-system, system-ui, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
}

/* Light Mode Override (Optional - kept for toggle but default is Dark) */
body.light-mode {
    --bg-color: #f8f9fa;
    --bg-secondary: #ffffff;
    --text-primary: #0a192f;
    --text-secondary: #333;
    --accent-color: #007bff;
    --card-bg: #ffffff;
    --card-border: #e0e0e0;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-heading);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    position: relative;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

h1 {
    font-size: clamp(40px, 8vw, 80px);
}

h2 {
    font-size: clamp(26px, 5vw, 32px);
}

h3 {
    font-size: 20px;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    position: relative;
    transition: var(--transition-medium);
}

a:hover {
    color: var(--accent-color);
    text-shadow: 0 0 10px var(--accent-glow);
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 25px;
}

section {
    padding: 100px 0;
}

/* Navigation - Floating Glass Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    padding: 1rem 0;
    transition: var(--transition-medium);
}

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

.logo {
    font-family: var(--font-mono);
    color: var(--accent-color);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
    border: 1px solid var(--accent-color);
    padding: 5px 10px;
    border-radius: 4px;
}

.logo:hover {
    background: var(--accent-glow);
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-primary);
    counter-increment: item 1;
}

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


.nav-links a::before {
    content: "";
    margin-right: 0;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
}

.hero-subtitle {
    font-family: var(--font-mono);
    color: var(--accent-color);
    margin-bottom: 20px;
    font-size: 16px;
}

.hero h1 {
    color: var(--text-primary);
    margin-bottom: 10px;
}

.hero h2 {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.hero p {
    max-width: 540px;
    font-size: 18px;
}

.cta-buttons {
    margin-top: 50px;
    display: flex;
    gap: 20px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 1.25rem 1.75rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    border: 1px solid var(--accent-color);
    background: transparent;
    color: var(--accent-color);
    text-decoration: none;
}

.btn i {
    margin-right: 8px;
}

.btn:hover {
    background: var(--accent-glow);
    transform: translateY(-3px);
}

.btn-primary {
    background: transparent;
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-primary);
    color: var(--text-primary);
}

/* Filter Buttons */
.filter-btn {
    background: transparent;
    border: 1px solid var(--text-secondary);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition-fast);
    margin: 0 5px;
}

.filter-btn:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background: var(--accent-glow);
}

.filter-btn.active {
    background: var(--accent-glow);
    color: var(--accent-color);
    border-color: var(--accent-color);
}

/* Project Group Headers */
.project-group {
    margin-bottom: 60px;
}

.project-group-header {
    margin-bottom: 30px;
    border-bottom: 1px solid #233554;
    padding-bottom: 10px;
}

.project-group-header h3 {
    display: flex;
    align-items: center;
}

.project-icon {
    color: var(--accent-color);
    margin-right: 15px;
    font-size: 24px;
}

/* Project Cards */
.projects-grid,
.project-card-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 50px;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    padding: 2rem 1.75rem;
    transition: var(--transition-medium);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.project-card:hover {
    transform: translateY(-7px);
    border-color: var(--card-hover-border);
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 25px;
}

.folder-icon {
    color: var(--accent-color);
    font-size: 40px;
}

.project-links a {
    color: var(--text-primary);
    margin-left: 15px;
    font-size: 20px;
}

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

.project-card h3 {
    font-size: 22px;
    margin-bottom: 10px;
}

.project-card h3 a {
    color: var(--text-primary);
}

.project-card h3 a:hover {
    color: var(--accent-color);
}

.project-description {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.project-tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding: 0;
    margin-top: 20px;
    list-style: none;
}

.project-tech-list li {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
}

/* Feature/Highlight Section (MCP) */
.mcp-ecosystem-section {
    background: #112240;
    border-radius: 10px;
    padding: 40px;
    margin-bottom: 60px;
    border: 1px solid var(--accent-color);
    position: relative;
    overflow: hidden;
}

.mcp-ecosystem-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(100, 255, 218, 0.05), transparent 70%);
    pointer-events: none;
}

.ecosystem-diagram-container {
    display: flex;
    justify-content: center;
    padding: 40px 0;
}

/* Footer */
footer {
    padding: 20px 0;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
}

/* Glitch Effect for Title (Optional) -- simplified for reliability */
.glitch {
    position: relative;
}

/* Guestbook */
.guestbook-container {
    max-width: 800px;
    margin: 0 auto;
}

.message-card {
    background: var(--bg-secondary);
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 6px;
    border-left: 3px solid var(--accent-color);
}

.message-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-secondary);
}


.form-group {
    margin-bottom: 20px;
}

.form-control {
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 12px 15px;
    width: 100%;
    border-radius: 4px;
    font-family: var(--font-heading);
    font-size: 15px;
    transition: var(--transition-fast);
}

.form-control:focus {
    border-color: var(--accent-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(100, 255, 218, 0.1);
}

/* Sentiment Badges */
.sentiment-badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sentiment-badge.positive {
    background: rgba(46, 204, 113, 0.2);
    color: #2ecc71;
    border: 1px solid rgba(46, 204, 113, 0.3);
}

.sentiment-badge.neutral {
    background: rgba(241, 196, 15, 0.2);
    color: #f1c40f;
    border: 1px solid rgba(241, 196, 15, 0.3);
}

.sentiment-badge.negative {
    background: rgba(231, 76, 60, 0.2);
    color: #e74c3c;
    border: 1px solid rgba(231, 76, 60, 0.3);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    /* Mobile menu toggle would be needed here, keeping simple for now */
    .hero h1 {
        font-size: 50px;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content>* {
    opacity: 0;
    animation: fadeInUp 1s cubic-bezier(0.645, 0.045, 0.355, 1) forwards;
}

.hero-content h1 {
    animation-delay: 0.1s;
}

.hero-content h2 {
    animation-delay: 0.2s;
}

.hero-content p {
    animation-delay: 0.3s;
}

.hero-content .cta-buttons {
    animation-delay: 0.4s;
}

/* MCP Diagram / Network Layout */
.mcp-network-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1fr;
    grid-template-rows: auto auto;
    gap: 30px;
    align-items: center;
    justify-content: center;
    margin: 60px 0;
    position: relative;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

/* Connecting Lines (Simulated with pseudo-elements for now, or use SVG background) */
.mcp-network-container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 20%;
    right: 20%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    z-index: 0;
    opacity: 0.3;
}

.mcp-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
    z-index: 1;
}

.mcp-column.center-hub {
    align-items: center;
    justify-content: center;
}

.mcp-column.left-tools {
    justify-content: center;
    align-items: flex-end;
}

.mcp-column.right-agents {
    justify-content: center;
    align-items: flex-start;
}

/* Specific Card Styles for Diagram */
.mcp-card {
    background: rgba(17, 34, 64, 0.9);
    border: 1px solid var(--accent-color);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    width: 100%;
    max-width: 300px;
    position: relative;
}

.mcp-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(100, 255, 218, 0.2);
    background: rgba(17, 34, 64, 1);
}

.mcp-card.core-server {
    border: 2px solid var(--accent-color);
    box-shadow: 0 0 30px rgba(100, 255, 218, 0.15);
    padding: 40px 20px;
    transform: scale(1.1);
    z-index: 2;
    background: #0a192f;
}

.mcp-card.core-server:hover {
    transform: scale(1.15);
    box-shadow: 0 0 40px rgba(100, 255, 218, 0.3);
}

.mcp-card .icon {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 15px;
    display: block;
}

.mcp-card h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 10px;
    font-family: var(--font-heading);
}

.mcp-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.4;
}

.mcp-card .btn-mini {
    padding: 5px 10px;
    font-size: 0.8rem;
    border: 1px solid var(--accent-color);
    border-radius: 3px;
    color: var(--accent-color);
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s;
}

.mcp-card .btn-mini:hover {
    background: var(--accent-glow);
}

/* Arrows */
.mcp-card.tool::after {
    content: '';
    position: absolute;
    right: -30px;
    top: 50%;
    width: 30px;
    height: 1px;
    background: var(--accent-color);
    opacity: 0.5;
}

.mcp-card.agent::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 50%;
    width: 30px;
    height: 1px;
    background: var(--accent-color);
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 900px) {
    .mcp-network-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        gap: 40px;
        margin: 30px 0;
    }

    .mcp-network-container::before {
        display: none;
    }

    .mcp-column.center-hub {
        order: -1;
    }

    .mcp-card.core-server {
        transform: scale(1);
    }

    .mcp-card.tool::after,
    .mcp-card.agent::before {
        display: none;
    }

    .mcp-column.left-tools,
    .mcp-column.right-agents {
        align-items: center;
    }
}