/* 
   Flame-Shield Engineering - Global Styles
   Brand: 熾焰屏障消防工程
   Theme: Defensive Engineering Aesthetics
*/

:root {
    --brand-black: #1A1A1B;      /* 鋼鐵隱燃黑 */
    --brand-red: #D32F2F;        /* 生命防禦紅 */
    --brand-gold: #FBC02D;       /* 壓力閥門金 */
    --brand-grey: #607D8B;       /* 排煙負壓灰 */
    --text-light: #E0E0E0;
    --text-muted: #9E9E9E;
    --border-color: #333333;
}

body {
    background-color: var(--brand-black);
    color: var(--text-light);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: #FFFFFF;
}

.mono-font {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Navbar Customization */
.navbar {
    background-color: rgba(26, 26, 27, 0.95);
    border-bottom: 2px solid var(--brand-red);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 900;
    color: var(--brand-red) !important;
    letter-spacing: 1px;
}

.nav-link {
    color: var(--text-light) !important;
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0 10px;
    transition: color 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--brand-red) !important;
}

/* Button Customization */
.btn-defense {
    background-color: transparent;
    border: 1px solid var(--brand-red);
    color: var(--brand-red);
    border-radius: 0;
    padding: 10px 25px;
    font-weight: 700;
    text-transform: uppercase;
    transition: all 0.3s ease;
}

.btn-defense:hover {
    background-color: var(--brand-red);
    color: white;
}

.btn-gold {
    border: 1px solid var(--brand-gold);
    color: var(--brand-gold);
}

.btn-gold:hover {
    background-color: var(--brand-gold);
    color: black;
}

/* Sections */
section {
    padding: 80px 0;
    border-bottom: 1px solid var(--border-color);
}

/* Cards */
.card-defense {
    background-color: #252526;
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--brand-red);
    border-radius: 0;
    padding: 20px;
    height: 100%;
    transition: transform 0.3s ease;
}

.card-defense:hover {
    transform: translateY(-5px);
    border-color: var(--brand-red);
}

/* Technical Specs Table */
.tech-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.tech-table th {
    background-color: #333;
    padding: 12px;
    text-align: left;
    border: 1px solid var(--border-color);
    color: var(--brand-gold);
}

.tech-table td {
    padding: 12px;
    border: 1px solid var(--border-color);
    color: var(--text-light);
}

/* Footer */
footer {
    background-color: #000;
    padding: 40px 0;
    border-top: 3px solid var(--brand-red);
    font-size: 0.85rem;
}

/* Heatmap Effect Placeholder */
.heatmap-bg {
    background: radial-gradient(circle at 50% 50%, rgba(211, 47, 47, 0.1) 0%, rgba(26, 26, 27, 1) 70%);
}