@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@300;400;500;600&family=Fira+Code:wght@400;500&display=swap');

:root {
    /* Color Palette */
    --bg-darker: #08090c;
    --bg-dark: #0e1117;
    --bg-card: rgba(18, 22, 30, 0.7);
    --bg-card-hover: rgba(26, 32, 44, 0.85);
    
    --primary: #f59e0b; /* Amber/Orange safety accent */
    --primary-glow: rgba(245, 158, 11, 0.15);
    --primary-dim: #d97706;
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    
    --border-steel: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(245, 158, 11, 0.3);
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    --font-heading: 'Space Grotesk', 'Metropolis', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'Fira Code', monospace;
}

/* Base resets & Custom Scrollbar */
* {
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-darker);
    color: var(--text-main);
    font-family: var(--font-body);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    letter-spacing: -0.02em;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-darker);
}
::-webkit-scrollbar-thumb {
    background: #1f2937;
    border-radius: 4px;
    border: 2px solid var(--bg-darker);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Glowing Industrial Background Grids */
.blueprint-grid {
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center;
}

.radial-glow {
    background: radial-gradient(circle 800px at 50% -100px, rgba(245, 158, 11, 0.07), transparent 80%);
}

.accent-glow-spot {
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* Premium Card Styles */
.industrial-card {
    background: var(--bg-card);
    border: 1px solid var(--border-steel);
    border-radius: 12px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.industrial-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, transparent 100%);
    pointer-events: none;
}

.industrial-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 15px 0 var(--primary-glow);
    background: var(--bg-card-hover);
}

/* Steel Rivet Corner Accent */
.rivet-corner::after {
    content: '';
    position: absolute;
    top: 6px;
    right: 6px;
    width: 4px;
    height: 4px;
    background-color: var(--text-dim);
    border-radius: 50%;
    box-shadow: 
        0 0 0 1px rgba(0, 0, 0, 0.5),
        -12px 0 0 0 var(--text-dim),
        0 12px 0 0 var(--text-dim),
        -12px 12px 0 0 var(--text-dim);
    opacity: 0.3;
}

/* Custom Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dim) 100%);
    color: #000;
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: 0.03em;
    border: none;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: 0.5s ease;
    z-index: -1;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--border-steel);
    font-family: var(--font-heading);
    font-weight: 500;
    transition: var(--transition-smooth);
}

.btn-secondary:hover {
    border-color: var(--primary);
    background-color: rgba(245, 158, 11, 0.05);
    color: var(--primary);
}

/* Tabs Switcher */
.tab-btn {
    font-family: var(--font-heading);
    font-weight: 500;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    transition: var(--transition-smooth);
}

.tab-btn.active {
    color: var(--primary);
    border-color: var(--primary);
    background-color: rgba(245, 158, 11, 0.05);
}

/* Table Design */
.steel-table {
    width: 100%;
    border-collapse: collapse;
}

.steel-table th {
    background-color: rgba(15, 23, 42, 0.6);
    color: var(--primary);
    font-family: var(--font-heading);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 12px 16px;
    text-align: left;
    border-bottom: 2px solid var(--border-steel);
}

.steel-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-steel);
    color: var(--text-main);
    font-size: 0.875rem;
}

.steel-table tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Weight Calculator Widgets */
.calc-input {
    background: rgba(10, 12, 16, 0.8);
    border: 1px solid var(--border-steel);
    color: var(--text-main);
    padding: 10px 14px;
    border-radius: 6px;
    transition: var(--transition-smooth);
    font-family: var(--font-mono);
    width: 100%;
}

.calc-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.2);
}

.calc-label {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
    display: block;
}

/* Badge styling */
.steel-badge {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
}

/* Custom Scroll Lock & Modals */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(5, 6, 8, 0.85);
    backdrop-filter: blur(8px);
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background-color: var(--bg-dark);
    border: 1px solid var(--border-steel);
    border-radius: 16px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7), 0 0 30px var(--primary-glow);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

/* Toast alert notification */
.toast-notif {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: #10b981;
    color: #fff;
    padding: 14px 20px;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast-notif.active {
    transform: translateY(0);
    opacity: 1;
}

/* Top Mini Nav Contact bar */
.top-contact-bar {
    height: 38px;
    background-color: #07080b;
    border-bottom: 1px solid var(--border-steel);
    font-size: 0.75rem;
    font-weight: 500;
}

/* Interactive Map Container */
.map-container {
    filter: grayscale(1) invert(0.9) contrast(1.2);
    border-radius: 12px;
    border: 1px solid var(--border-steel);
    overflow: hidden;
    height: 320px;
}

/* Animated hover indicator */
.hover-glow-effect {
    transition: var(--transition-smooth);
}
.hover-glow-effect:hover {
    box-shadow: 0 0 20px 0 var(--primary-glow);
    border-color: var(--primary);
}

/* Text animations */
.reveal-text {
    background: linear-gradient(to right, #ffffff, #9ca3af);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Responsive adjustment variables */
@media (max-width: 768px) {
    .blueprint-grid {
        background-size: 20px 20px;
    }
    .radial-glow {
        background: radial-gradient(circle 400px at 50% -50px, rgba(245, 158, 11, 0.05), transparent 80%);
    }
}