/* ============================================
   THE TACTIC LAB - Scientific Dark Mode Design System
   "The Situation Room for your Biology"
   ============================================ */

/* ============================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
    /* Color Palette - Scientific Dark Mode */
    --bg-primary: #0D1117;
    --bg-secondary: #161B22;
    --bg-card: #21262D;
    --bg-card-hover: #30363D;
    --border-color: #30363D;
    --border-glow: rgba(0, 255, 157, 0.3);

    /* Accent Colors */
    --signal-green: #00FF9D;
    --signal-green-dim: rgba(0, 255, 157, 0.15);
    --signal-orange: #FF7B00;
    --signal-orange-dim: rgba(255, 123, 0, 0.15);
    --signal-blue: #58A6FF;
    --signal-blue-dim: rgba(88, 166, 255, 0.15);

    /* Text Colors */
    --text-primary: #E6EDF3;
    --text-secondary: #8B949E;
    --text-muted: #6E7681;

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

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow-green: 0 0 20px rgba(0, 255, 157, 0.3);
    --shadow-glow-orange: 0 0 20px rgba(255, 123, 0, 0.3);
    --shadow-glow-blue: 0 0 20px rgba(88, 166, 255, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Layout */
    --max-width: 1200px;
    --header-height: 72px;
}

/* ============================================
   2. RESET & BASE STYLES
   ============================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ============================================
   3. TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-mono);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--signal-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    color: var(--text-primary);
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.75rem);
    color: var(--text-primary);
}

h4 {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

p {
    color: var(--text-secondary);
    max-width: 65ch;
}

.text-mono {
    font-family: var(--font-mono);
}

.text-gradient {
    background: linear-gradient(135deg, var(--signal-green) 0%, var(--signal-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

a {
    color: var(--signal-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--signal-green);
}

/* ============================================
   4. LAYOUT UTILITIES
   ============================================ */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.section {
    padding: var(--space-4xl) 0;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

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

.justify-between {
    justify-content: space-between;
}

.gap-sm {
    gap: var(--space-sm);
}

.gap-md {
    gap: var(--space-md);
}

.gap-lg {
    gap: var(--space-lg);
}

.gap-xl {
    gap: var(--space-xl);
}

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

/* ============================================
   5. HEADER & NAVIGATION
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background var(--transition-base);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--signal-green) 0%, var(--signal-blue) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon svg {
    width: 20px;
    height: 20px;
    color: var(--bg-primary);
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--signal-green);
    transition: width var(--transition-base);
}

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

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

/* ============================================
   6. BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--signal-green) 0%, #00CC7D 100%);
    color: var(--bg-primary);
    box-shadow: var(--shadow-glow-green);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 255, 157, 0.5);
    color: var(--bg-primary);
}

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

.btn-secondary:hover {
    border-color: var(--signal-green);
    color: var(--signal-green);
}

.btn-ghost {
    background: transparent;
    color: var(--signal-blue);
    padding: var(--space-sm) var(--space-md);
}

.btn-ghost:hover {
    background: var(--signal-blue-dim);
}

/* ============================================
   7. CARDS
   ============================================ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--signal-green);
    box-shadow: var(--shadow-glow-green);
    transform: translateY(-4px);
}

.card-glass {
    background: rgba(33, 38, 45, 0.6);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(48, 54, 61, 0.5);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 1.5rem;
}

.card-icon-green {
    background: var(--signal-green-dim);
    color: var(--signal-green);
}

.card-icon-orange {
    background: var(--signal-orange-dim);
    color: var(--signal-orange);
}

.card-icon-blue {
    background: var(--signal-blue-dim);
    color: var(--signal-blue);
}

/* ============================================
   8. HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: var(--header-height);
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0, 255, 157, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(88, 166, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(255, 123, 0, 0.05) 0%, transparent 40%);
    pointer-events: none;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(48, 54, 61, 0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(48, 54, 61, 0.3) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--signal-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.hero h1 {
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   9. FEATURES SECTION
   ============================================ */
.features {
    background: var(--bg-secondary);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-3xl);
}

.section-header h2 {
    margin-bottom: var(--space-md);
}

.section-header p {
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
}

.feature-card p {
    font-size: 0.95rem;
}

/* ============================================
   10. SIGNAL ENGINE SECTION
   ============================================ */
.signal-engine {
    position: relative;
    overflow: hidden;
}

.signal-engine-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.signal-content h2 {
    margin-bottom: var(--space-lg);
}

.signal-content p {
    margin-bottom: var(--space-lg);
}

.signal-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--signal-orange);
    background: var(--signal-orange-dim);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-xl);
}

.signal-demo {
    position: relative;
}

/* Tactic Card Demo */
.tactic-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    position: relative;
    cursor: pointer;
    transition: all var(--transition-base);
}

.tactic-card:hover {
    border-color: var(--signal-orange);
}

.tactic-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.tactic-title {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-primary);
}

.tactic-category {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.notification-dot {
    width: 12px;
    height: 12px;
    background: var(--signal-orange);
    border-radius: 50%;
    animation: pulse-orange 2s infinite;
    box-shadow: var(--shadow-glow-orange);
}

@keyframes pulse-orange {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.2);
        opacity: 0.8;
    }
}

.tactic-meta {
    display: flex;
    gap: var(--space-md);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Radar Panel */
.radar-panel {
    position: absolute;
    top: 0;
    right: -320px;
    width: 300px;
    background: var(--bg-card);
    border: 1px solid var(--signal-orange);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-glow-orange);
    transition: all var(--transition-slow);
    opacity: 0;
    z-index: 10;
}

.radar-panel.active {
    right: -20px;
    opacity: 1;
}

.radar-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.radar-icon {
    font-size: 1.25rem;
}

.radar-title {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--signal-orange);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.radar-source {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.radar-source strong {
    color: var(--text-primary);
}

.radar-confidence {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--signal-green);
    margin-bottom: var(--space-md);
}

.confidence-bar {
    flex: 1;
    height: 4px;
    background: var(--bg-secondary);
    border-radius: 2px;
    overflow: hidden;
}

.confidence-fill {
    width: 85%;
    height: 100%;
    background: var(--signal-green);
    border-radius: 2px;
}

.radar-insight {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.6;
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--signal-orange);
}

/* ============================================
   11. FEATURE MATRIX
   ============================================ */
.matrix {
    background: var(--bg-secondary);
}

.matrix-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.matrix-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.matrix-item:hover {
    border-color: var(--signal-blue);
    transform: translateX(8px);
}

.matrix-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--signal-blue-dim);
    color: var(--signal-blue);
    border-radius: var(--radius-md);
    font-size: 1.5rem;
}

.matrix-content h4 {
    font-family: var(--font-mono);
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.matrix-content p {
    font-size: 0.9rem;
}

/* ============================================
   12. CTA SECTION
   ============================================ */
.cta-section {
    text-align: center;
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(0, 255, 157, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.cta-box {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding: var(--space-3xl);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
}

.cta-box h2 {
    margin-bottom: var(--space-md);
}

.cta-box p {
    margin: 0 auto var(--space-xl);
}

/* ============================================
   13. FOOTER
   ============================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-2xl) 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
    list-style: none;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--signal-green);
}

.footer-copy {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============================================
   14. REGISTRATION PAGE
   ============================================ */
.register-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl) var(--space-xl);
}

.register-card {
    width: 100%;
    max-width: 480px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl);
}

.register-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.register-header h1 {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.register-header p {
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-input {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--signal-green);
    box-shadow: 0 0 0 3px var(--signal-green-dim);
}

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

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.checkbox-label:hover {
    border-color: var(--signal-blue);
}

.checkbox-label input {
    display: none;
}

.checkbox-label input:checked+span {
    color: var(--signal-green);
}

.checkbox-label:has(input:checked) {
    border-color: var(--signal-green);
    background: var(--signal-green-dim);
}

.form-submit {
    width: 100%;
    margin-top: var(--space-lg);
}

/* Success State */
.register-success {
    text-align: center;
    padding: var(--space-2xl);
}

.success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-xl);
    background: var(--signal-green-dim);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--signal-green);
}

.register-success h2 {
    margin-bottom: var(--space-md);
}

/* Hidden by default */
.hidden {
    display: none !important;
}

/* ============================================
   15. ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 {
    animation-delay: 0.1s;
}

.animate-delay-2 {
    animation-delay: 0.2s;
}

.animate-delay-3 {
    animation-delay: 0.3s;
}

.animate-delay-4 {
    animation-delay: 0.4s;
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   16. RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .signal-engine-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .signal-demo {
        order: -1;
    }

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

@media (max-width: 768px) {
    :root {
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
        --space-3xl: 2.5rem;
        --space-4xl: 3rem;
    }

    .nav-links {
        display: none;
    }

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

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

    .footer-inner {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }
}