/* ============================================
   GRAYTECH.ONE — Modern Cyberpunk Design System
   Built for infrastructure professionals
   ============================================ */

/* CSS Variables — Color System */
:root {
    /* Base Colors */
    --bg-primary: #0a0a0b;
    --bg-secondary: #121214;
    --bg-tertiary: #1a1a1c;
    --bg-elevated: #1e1e20;
    
    /* Accent Colors */
    --accent-primary: #00d4aa;
    --accent-primary-dim: #00d4aa22;
    --accent-secondary: #7c3aed;
    --accent-secondary-dim: #7c3aed22;
    
    /* Text Colors */
    --text-primary: #f7f8f8;
    --text-secondary: #a0a0a8;
    --text-tertiary: #6e6e78;
    --text-muted: #4a4a52;
    
    /* Semantic Colors */
    --success: #10b981;
    --success-dim: #10b98115;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Borders */
    --border-primary: rgba(255, 255, 255, 0.08);
    --border-secondary: rgba(255, 255, 255, 0.05);
    --border-accent: rgba(0, 212, 170, 0.3);
    
    /* Spacing Scale */
    --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;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Monaco, monospace;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Shadows */
    --shadow-glow: 0 0 30px rgba(0, 212, 170, 0.15);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
    margin-bottom: var(--space-md);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

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

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

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-secondary);
    transition: all var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
    color: var(--text-primary);
}

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

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

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

.logo-text-accent {
    color: var(--text-secondary);
}

/* Nav Links */
.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: var(--space-lg);
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

/* Nav Toggle (Mobile) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all var(--transition-base);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: calc(72px + var(--space-4xl)) var(--space-xl) var(--space-4xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 212, 170, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 170, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.glow-orb-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-primary);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.glow-orb-2 {
    width: 300px;
    height: 300px;
    background: var(--accent-secondary);
    bottom: 20%;
    right: 15%;
    animation-delay: -7s;
}

.glow-orb-3 {
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.05);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

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

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: var(--space-sm) var(--space-md);
    border-radius: 9999px;
    margin-bottom: var(--space-xl);
    border: 1px solid var(--border-secondary);
}

.tag-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    margin-bottom: var(--space-lg);
    line-height: 1.1;
}

.title-line {
    display: block;
}

.title-line.accent {
    color: var(--accent-primary);
    text-shadow: 0 0 40px rgba(0, 212, 170, 0.3);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

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

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    margin-top: var(--space-4xl);
    position: relative;
    z-index: 1;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 500;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    line-height: 1;
}

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

.btn-primary:hover {
    background: #00f5c4;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

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

.btn-ghost:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-accent);
}

.btn-small {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

.btn-full {
    width: 100%;
}

.btn-arrow {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}

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

/* ============================================
   SECTIONS GENERAL
   ============================================ */
section {
    padding: var(--space-4xl) 0;
}

.section-header {
    margin-bottom: var(--space-3xl);
}

.section-header.centered {
    text-align: center;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.section-title {
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
}

.section-subtitle:only-child {
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-secondary);
    border-bottom: 1px solid var(--border-secondary);
}

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

.service-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    position: relative;
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-primary);
    box-shadow: var(--shadow-card);
}

.service-card.featured {
    border-color: var(--border-accent);
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(0, 212, 170, 0.05) 100%);
}

.service-card.featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
}

.service-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-primary);
    background: var(--accent-primary-dim);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.service-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-md);
    color: var(--accent-primary);
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-card h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.25rem;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
}

.service-list {
    list-style: none;
    padding: 0;
}

.service-list li {
    position: relative;
    padding-left: 1.25rem;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: var(--space-xs);
}

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

/* ============================================
   WHY US SECTION (replaces About)
   ============================================ */
.why-us {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-secondary);
    border-bottom: 1px solid var(--border-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.feature {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.feature:hover {
    border-color: var(--border-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}

.feature-number {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-md);
}

.feature h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.125rem;
}

.feature p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

/* Metrics Row */
.metrics-row {
    display: flex;
    justify-content: center;
    gap: var(--space-3xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--border-secondary);
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   EXPERTISE SECTION
   ============================================ */
.expertise {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-secondary);
    border-bottom: 1px solid var(--border-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.tech-category {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.tech-category h4 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-secondary);
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tech-item {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    background: var(--bg-elevated);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-secondary);
    transition: all var(--transition-fast);
}

.tech-item:hover {
    border-color: var(--border-accent);
    color: var(--text-primary);
    background: var(--accent-primary-dim);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    padding-bottom: var(--space-4xl);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-3xl);
    align-items: start;
}

.contact-lead {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.contact-methods {
    margin-bottom: var(--space-xl);
}

.contact-method {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.contact-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
}

.contact-icon svg {
    width: 20px;
    height: 20px;
}

.contact-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.contact-link,
.contact-username,
.contact-detail {
    color: var(--text-primary);
    font-size: 0.9375rem;
}

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

.contact-availability {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.contact-availability h4 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.contact-availability p {
    font-size: 0.9375rem;
    color: var(--text-tertiary);
    margin-bottom: var(--space-md);
}

.contact-availability p:last-child {
    margin-bottom: 0;
}

.availability-status {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--text-primary) !important;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2s ease-in-out infinite;
}

/* Contact Form */
.contact-form-container {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.contact-form {
    display: none;
}

.contact-form.active {
    display: block;
}

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

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: 0.9375rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

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

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236e6e78' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-success {
    display: none;
    text-align: center;
    padding: var(--space-2xl) var(--space-xl);
}

.form-success.active {
    display: block;
}

.success-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-lg);
    color: var(--success);
}

.success-icon svg {
    width: 100%;
    height: 100%;
}

.form-success h3 {
    margin-bottom: var(--space-sm);
}

.form-success p {
    color: var(--text-secondary);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-secondary);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-logo {
    display: inline-flex;
    margin-bottom: var(--space-md);
}

.footer-tagline {
    color: var(--text-tertiary);
    font-size: 0.9375rem;
    max-width: 280px;
}

.footer-links h4 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

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

.footer-cta h4 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.footer-cta .btn {
    margin-bottom: var(--space-md);
}

.footer-email {
    font-size: 0.875rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-secondary);
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin: 0;
}

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

/* ============================================
   RESPONSIVE STYLES
   ============================================ */
/* Responsive for Why Us section */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .metrics-row {
        flex-wrap: wrap;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--space-md);
        border-bottom: 1px solid var(--border-secondary);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-xl);
    }
    
    .about-stats {
        flex-wrap: wrap;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-brand {
        grid-column: span 1;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
        --space-3xl: 2.5rem;
        --space-4xl: 3rem;
    }
    
    .hero {
        padding-top: calc(72px + var(--space-2xl));
        padding-bottom: var(--space-2xl);
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
}

/* ============================================
   ANIMATIONS & UTILITIES
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

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

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

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

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

/* Honeypot field - hidden from real users, visible to bots */
.hp-field {
position: absolute;
left: -9999px;
opacity: 0;
width: 0;
height: 0;
overflow: hidden;
}

/* --- CAPTCHA field styling --- */
.captcha-group label {
    display: block;
    color: var(--text-secondary, #8a8aa0);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
}

.captcha-group input[type="number"] {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color, rgba(255,255,255,0.1));
    border-radius: 8px;
    background: var(--card-bg, #0a0a0f);
    color: var(--text-primary, #e8e8f0);
    font-family: var(--font-body, 'Inter', sans-serif);
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    -moz-appearance: textfield;
}

.captcha-group input[type="number"]::-webkit-inner-spin-button,
.captcha-group input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.captcha-group input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-cyan, #00d4aa);
    box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15);
}