/* =========================================
   1. VARIABLES & RESET
   ========================================= */
:root {
    /* Colors - Dark Professional Theme (Matching V3) */
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #252525;
    --accent-primary: #00ff9d;
    /* Cyber Green */
    --accent-secondary: #2ecc71;
    --accent-hover: #00cc7d;
    --text-main: #e0e0e0;
    --text-muted: #a0a0a0;
    --text-dark: #121212;
    --border-color: #333333;

    /* Effects */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --glow-accent: 0 0 15px rgba(0, 255, 157, 0.15);

    /* Typography */
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* =========================================
   2. LAYOUT
   ========================================= */
.app-container {
    width: 100%;
    max-width: 1200px;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    gap: 60px;
}

/* Header Section */
header {
    text-align: center;
    margin-bottom: 20px;
}

.header-image {
    max-height: 400px;
    width: auto;
    /* Glass-morphism Frame */
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(0, 255, 157, 0.3);
    border-radius: 16px;
    padding: 24px;

    /* Neon Backlight Glow */
    box-shadow:
        0 0 20px rgba(0, 255, 157, 0.1),
        0 0 40px rgba(0, 255, 157, 0.05),
        inset 0 0 20px rgba(0, 255, 157, 0.05);

    margin-bottom: 30px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.header-image:hover {
    transform: scale(1.02) translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow:
        0 10px 30px rgba(0, 255, 157, 0.2),
        0 0 60px rgba(0, 255, 157, 0.1),
        inset 0 0 30px rgba(0, 255, 157, 0.1);
}

.title {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

hr {
    border: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
    margin: 0;
    width: 100%;
}

.spacer {
    height: 40px;
}

/* =========================================
   3. VERSIONS GRID / STACK
   ========================================= */
.versions-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    max-width: 800px;
    /* Limit width for cleaner single column */
    margin: 0 auto;
}

.version-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px 30px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: block;
    width: 100%;
}

.version-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg), var(--glow-accent);
    border-color: var(--accent-primary);
}

.version-card:active {
    transform: translateY(-2px);
}

/* Card Content */
.card-content-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
}

.version-number {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-primary);
    background: rgba(0, 255, 157, 0.1);
    padding: 4px 10px;
    border-radius: 4px;
    font-weight: 700;
}

.card-description {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
    flex-grow: 1;
}

.card-status {
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

/* Status Colors */
.status-active .status-dot {
    background-color: var(--accent-primary);
    box-shadow: 0 0 8px var(--accent-primary);
}

.status-dev .status-dot {
    background-color: #ffb74d;
    /* Orange */
    box-shadow: 0 0 8px #ffb74d;
}

.status-legacy .status-dot {
    background-color: #757575;
    /* Grey */
}

.tool-status.external {
    border-color: #14ffff;
}

.tool-status.external .status-dot {
    background: #14ffff;
    box-shadow: 0 0 8px #14ffff
}

/* Section Titles */
.section-label {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-label::after {
    content: '';
    height: 1px;
    flex-grow: 1;
    background: var(--border-color);
}

/* Footer */
footer {
    margin-top: auto;
    padding: 40px 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
}