/* GIFT Framework v2.0 - Pip-Boy Terminal Theme */
/* Inspired by Fallout Pip-Boy aesthetic: Black background, amber monochrome */

/* CSS Variables */
:root {
    --color-primary: #FFB000;      /* Amber primary */
    --color-secondary: #CC8800;    /* Darker amber */
    --color-tertiary: #996600;     /* Muted amber */
    --color-bg: #000000;           /* Pure black */
    --color-bg-panel: #0a0a0a;     /* Slightly lighter black */
    --color-border: #FFB000;       /* Amber border */
    
    --font-mono: 'Courier New', 'Consolas', 'Monaco', monospace;
    
    --border-width: 2px;
    --glow-strength: 4px;
}

/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-mono);
    background: var(--color-bg);
    color: var(--color-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Scanline Effect - Subtle CRT aesthetic */
.scanline {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15),
        rgba(0, 0, 0, 0.15) 1px,
        transparent 1px,
        transparent 2px
    );
    pointer-events: none;
    z-index: 9999;
    animation: scanline-flicker 8s linear infinite;
}

@keyframes scanline-flicker {
    0%, 100% { opacity: 0.05; }
    50% { opacity: 0.1; }
}

/* Container */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 1rem;
}

/* Terminal Header */
.terminal-header {
    border: var(--border-width) solid var(--color-border);
    padding: 1.5rem;
    margin-bottom: 1rem;
    background: var(--color-bg-panel);
    box-shadow: 0 0 var(--glow-strength) var(--color-secondary);
}

.header-content h1 {
    font-size: 2rem;
    letter-spacing: 0.2rem;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 8px var(--color-primary);
}

.subtitle {
    font-size: 1rem;
    color: var(--color-secondary);
    letter-spacing: 0.15rem;
    margin-bottom: 1rem;
}

.system-info {
    font-size: 0.85rem;
    color: var(--color-tertiary);
    letter-spacing: 0.05rem;
}

.separator {
    margin: 0 0.75rem;
    color: var(--color-secondary);
}

/* Tab Navigation */
.tab-navigation {
    display: flex;
    gap: 0;
    margin-bottom: 0;
    border: var(--border-width) solid var(--color-border);
    border-bottom: none;
}

.tab-button {
    flex: 1;
    background: var(--color-bg-panel);
    border: none;
    border-right: var(--border-width) solid var(--color-border);
    padding: 1rem;
    color: var(--color-tertiary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.1rem;
}

.tab-button:last-child {
    border-right: none;
}

.tab-button:hover {
    background: #151515;
    color: var(--color-secondary);
}

.tab-button.active {
    background: var(--color-bg);
    color: var(--color-primary);
    box-shadow: inset 0 0 var(--glow-strength) var(--color-secondary);
    text-shadow: 0 0 6px var(--color-primary);
}

.tab-label {
    display: block;
    font-weight: bold;
}

/* Content Area */
.content-area {
    border: var(--border-width) solid var(--color-border);
    background: var(--color-bg-panel);
    min-height: 600px;
    box-shadow: 0 0 var(--glow-strength) var(--color-secondary);
}

.tab-content {
    display: none;
    padding: 1.5rem;
}

.tab-content.active {
    display: block;
}

/* Content Header */
.content-header {
    border-bottom: 1px solid var(--color-secondary);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.content-header h2 {
    font-size: 1.5rem;
    letter-spacing: 0.15rem;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
    text-shadow: 0 0 6px var(--color-secondary);
}

.content-stats {
    font-size: 0.8rem;
    color: var(--color-tertiary);
    letter-spacing: 0.05rem;
}

/* Visualization Container */
.visualization-container {
    margin: 1.5rem 0;
    border: 1px solid var(--color-tertiary);
    background: var(--color-bg);
    height: 700px;
    position: relative;
}

.viz-frame {
    width: 100%;
    height: 100%;
    border: none;
    background: #ffffff;
}

/* Content Footer */
.content-footer {
    border-top: 1px solid var(--color-secondary);
    padding-top: 1rem;
    margin-top: 1.5rem;
}

.content-footer p {
    font-size: 0.85rem;
    color: var(--color-secondary);
    margin: 0.25rem 0;
    letter-spacing: 0.05rem;
}

/* Terminal Footer */
.terminal-footer {
    border: var(--border-width) solid var(--color-border);
    padding: 1rem 1.5rem;
    margin-top: 1rem;
    background: var(--color-bg-panel);
    box-shadow: 0 0 var(--glow-strength) var(--color-secondary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    letter-spacing: 0.05rem;
}

.footer-left {
    color: var(--color-tertiary);
}

.footer-right a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-right a:hover {
    color: var(--color-primary);
    text-shadow: 0 0 6px var(--color-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .terminal-header {
        padding: 1rem;
    }
    
    .header-content h1 {
        font-size: 1.5rem;
        letter-spacing: 0.1rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .system-info {
        font-size: 0.75rem;
        line-height: 1.8;
    }
    
    .separator {
        display: none;
    }
    
    .tab-navigation {
        flex-direction: column;
    }
    
    .tab-button {
        border-right: none;
        border-bottom: var(--border-width) solid var(--color-border);
    }
    
    .tab-button:last-child {
        border-bottom: none;
    }
    
    .visualization-container {
        height: 500px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}

/* Accessibility - Focus states */
.tab-button:focus,
a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .scanline {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .terminal-header,
    .content-area,
    .terminal-footer {
        border-color: black;
        box-shadow: none;
    }
}

/* Additional Terminal Effects */
@keyframes flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.96; }
}

.terminal-header,
.content-area,
.terminal-footer {
    animation: flicker 3s ease-in-out infinite;
}

/* Glow effect on hover for interactive elements */
.tab-button:hover,
.footer-right a:hover {
    filter: brightness(1.2);
}