/* ==========================================================================
   CSS Variables & Design Tokens (Industrial Precision Theme)
   ========================================================================== */
:root {
    /* Colors - Dark Mode Base */
    --color-bg-base: #0a0c10;
    /* Deep space background */
    --color-bg-surface: #12151c;
    /* Elevated surface */
    --color-bg-card: #1a1e28;
    /* Card background */
    --color-border: #293040;
    /* Subtle borders */

    /* Colors - Accents (Brand Identity) */
    --color-primary: #0092ea;
    /* Light Blue [0, 146, 234] */
    --color-primary-glow: rgba(0, 146, 234, 0.4);
    --color-primary-dark: #0077c0;
    --color-secondary: #75c445;
    /* Lime [117, 196, 69] */
    --color-secondary-glow: rgba(117, 196, 69, 0.4);

    /* Colors - Typography */
    --color-text-main: #e2e8f0;
    /* Main read text */
    --color-text-muted: #94a3b8;
    /* Secondary text */
    --color-text-inverse: #0f172a;
    /* Text on primary background */

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

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-2xl: 8rem;

    /* Borders & Shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-glow: 0 0 15px var(--color-primary-glow);
    --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);

    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

::selection {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

/* Typography Elements */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    color: #ffffff;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

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

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

a:hover {
    color: #fff;
    text-shadow: 0 0 8px var(--color-primary-glow);
}

/* Code & Pre */
code,
pre {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

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

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

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

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

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

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

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

/* Layout Helpers */
.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

/* Layout - Header/Nav */
.site-header {
    background: rgba(10, 12, 16, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--space-md) 0;
}

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

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-transform: uppercase;
    font-weight: 800;
    letter-spacing: 2px;
    color: #fff;
}

.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}

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

.nav-links a {
    color: var(--color-text-main);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--color-secondary);
    transition: width var(--transition-fast);
}

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

/* Mobile Nav Toggle */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 1.5rem;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-bg-surface);
        padding: 0 var(--space-md);
        border-bottom: 1px solid var(--color-border);
        gap: 0;
    }

    .nav-links.is-open {
        display: flex;
    }

    .nav-links li {
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links li:last-child {
        border-bottom: none;
    }

    .nav-links a {
        display: block;
        padding: var(--space-md) 0;
    }

    /* Hero adjustments */
    .hero-content {
        min-height: 60vh;
        padding-top: 80px;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .hero::before {
        width: 350px;
        height: 350px;
        right: -15%;
    }

    .hero::after {
        width: 250px;
        height: 250px;
    }

    /* Grid collapses to single column */
    .grid-3 {
        grid-template-columns: 1fr;
    }

    /* Reduce section spacing */
    .section {
        padding: var(--space-lg) 0;
    }

    /* Smaller header offset on mobile */
    .page-content {
        padding-top: 80px;
    }

    /* Hide logo text on small screens, keep icon */
    .logo-container span {
        display: none;
    }

    /* Stats grid: 2 columns on tablet, collapses further below */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Footer grid stacks */
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-lg);
    }

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

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    /* Contact form 2-col grid stacks */
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
}

/* Decorative blue glow — top right */
.hero::before {
    content: '';
    position: absolute;
    top: 5%;
    right: -5%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 1;
}

/* Decorative lime glow — bottom left */
.hero::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: 5%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(117, 196, 69, 0.1) 0%, transparent 70%);
    pointer-events: none;
    z-index: 1;
}

.hero-content {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    position: relative;
    z-index: 2;
}

.hero-badge {
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    max-width: 600px;
    margin-bottom: var(--space-lg);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
}

/* ==========================================================================
   Page Content (inner pages with fixed header offset)
   ========================================================================== */
.page-content {
    padding-top: 100px;
}

/* ==========================================================================
   Section Variants
   ========================================================================== */
.section--surface {
    background-color: var(--color-bg-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section--compact {
    padding-bottom: var(--space-md);
}

/* ==========================================================================
   Section Header (left-border accent)
   ========================================================================== */
.section-header {
    padding-left: var(--space-md);
    margin-bottom: var(--space-lg);
    border-left: 2px solid var(--color-primary);
}

.section-header--lime {
    border-left-color: var(--color-secondary);
}

.section-header--white {
    border-left-color: var(--color-text-main);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-lg) 0;
    background-color: var(--color-bg-surface);
    text-align: center;
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-secondary), transparent);
}

.site-footer p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* ==========================================================================
   Enhanced Footer Layout
   ========================================================================== */
.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-xl);
    text-align: left;
    margin-bottom: var(--space-lg);
}

.footer-brand p {
    font-size: 0.85rem;
    max-width: 300px;
}

.footer-heading {
    font-size: 0.8rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-secondary);
    margin-bottom: var(--space-md);
}

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

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

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

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-md);
}

/* ==========================================================================
   Stats / Credibility Section
   ========================================================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.stat-item {
    text-align: center;
    padding: var(--space-lg) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-bg-card);
}

.stat-value {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-value--lime {
    color: var(--color-secondary);
}

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

/* Tool / Standard tags */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
}

.tag {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    border-radius: var(--radius-sm);
    background-color: rgba(0, 146, 234, 0.08);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

/* ==========================================================================
   Tech Table Responsive Wrapper
   ========================================================================== */
.tech-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* ==========================================================================
   Knowledge Base Article Cards
   ========================================================================== */
.article-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-normal);
}

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

.article-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    padding-top: 0.2rem;
}

.article-title {
    font-size: 1.1rem;
    margin-bottom: var(--space-xs);
}

.article-excerpt {
    font-size: 0.9rem;
    margin-bottom: var(--space-sm);
}

.article-tags {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.article-status {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    font-size: 0.7rem;
    font-family: var(--font-mono);
    border-radius: var(--radius-sm);
    background-color: rgba(117, 196, 69, 0.1);
    color: var(--color-secondary);
    border: 1px solid var(--color-secondary);
}

@media (max-width: 480px) {
    .article-card {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Form Layout Helpers
   ========================================================================== */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

/* ==========================================================================
   Team Profile Cards (About Page)
   ========================================================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.profile-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.profile-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-card);
}

.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text-inverse);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.profile-avatar--lime {
    background: linear-gradient(135deg, var(--color-secondary), #5a9e30);
}

.profile-role {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: var(--space-xs);
}

.profile-experience {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.profile-card:nth-child(2) .profile-experience {
    color: var(--color-secondary);
}

.profile-expertise {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
    text-align: left;
}

.profile-expertise li {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    padding-left: var(--space-md);
    position: relative;
}

.profile-expertise li::before {
    content: '\25B8';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.profile-background {
    font-size: 0.8rem;
    font-style: italic;
    color: var(--color-text-muted);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
    margin-bottom: 0;
}

@media (max-width: 480px) {
    .team-grid {
        grid-template-columns: 1fr;
    }
}