:root {
    /* Premium GitHub-Cyberpunk Tokens */
    --bg-canvas: #0d1117;
    --bg-surface: #161b22;
    --bg-overlay: #1c2128;
    --bg-inset: #21262d;
    --border: #30363d;
    --border-muted: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #484f58;
    --neon-white: #f0f6fc;
    --neon-blue: #79c0ff;
    --neon-green: #56d364;
    --neon-yellow: #e3b341;
    --neon-red: #f85149;
    --neon-purple: #bc8cff;
    --neon-cyan: #39d3f2;
    --accent: #f0f6fc;
    --accent-glow: rgba(240, 246, 252, 0.08);
    --green-glow: rgba(86, 211, 100, 0.12);
    --blue-glow: rgba(121, 192, 255, 0.1);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --font-mono: 'JetBrains Mono', monospace;
    --font-display: 'Geist', sans-serif;

    /* Legacy Layout mapping */
    --primary: var(--neon-blue);
    --success: var(--neon-green);
    --warning: var(--neon-yellow);
    --danger: var(--neon-red);
}

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

body {
    font-family: var(--font-display);
    background: var(--bg-canvas);
    color: var(--text-primary);
    min-height: 100vh;
    margin: 0;
    font-size: 14px;
    line-height: 1.5;
}

/* ─── UTILITIES ─── */
.text-green {
    color: var(--neon-green);
}

.text-blue {
    color: var(--neon-blue);
}

.text-yellow {
    color: var(--neon-yellow);
}

.text-red {
    color: var(--neon-red);
}

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

.tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 10px;
    font-family: var(--font-mono);
    font-weight: 600;
    border: 1px solid;
    text-transform: uppercase;
}

.tag-green {
    background: rgba(86, 211, 100, 0.08);
    border-color: rgba(86, 211, 100, 0.3);
    color: var(--neon-green);
}

.tag-blue {
    background: rgba(121, 192, 255, 0.08);
    border-color: rgba(121, 192, 255, 0.3);
    color: var(--neon-blue);
}

.tag-yellow {
    background: rgba(227, 179, 65, 0.08);
    border-color: rgba(227, 179, 65, 0.3);
    color: var(--neon-yellow);
}

.tag-red {
    background: rgba(248, 81, 73, 0.08);
    border-color: rgba(248, 81, 73, 0.3);
    color: var(--neon-red);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    border: 1px solid transparent;
    font-family: var(--font-display);
    text-decoration: none;
}

.btn-primary {
    background: var(--neon-white);
    color: var(--bg-canvas);
    border-color: var(--neon-white);
    font-weight: 600;
    box-shadow: 0 0 20px rgba(240, 246, 252, 0.15);
}

.btn-default {
    background: var(--bg-inset);
    border-color: var(--border);
    color: var(--text-primary);
}

.btn-success {
    background: rgba(86, 211, 100, 0.1);
    border-color: rgba(86, 211, 100, 0.3);
    color: var(--neon-green);
}

.btn-danger {
    background: rgba(248, 81, 73, 0.1);
    border-color: rgba(248, 81, 73, 0.3);
    color: var(--neon-red);
}

.code-block {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 20px;
}

.code-block-header {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-muted);
    background: var(--bg-overlay);
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
}

.code-block-body {
    padding: 16px;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
}

.insight-item {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-muted);
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.insight-item:hover {
    background: var(--bg-overlay);
}

.insight-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    margin-top: 5px;
    flex-shrink: 0;
}

/* ─── APP LAYOUT ─── */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    background: var(--bg-canvas);
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

.sidebar.collapsed~.main-content {
    margin-left: 0;
}

@media (max-width: 768px) {
    .main-content {
        margin-left: 0;
    }
}

/* ─── NEURAL FORM HARDWARE ─── */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,
select,
.form-control-neural {
    width: 100%;
    padding: 12px 18px;
    background: rgba(13, 17, 23, 0.7) !important;
    border: 1px solid rgba(57, 211, 242, 0.2) !important;
    border-radius: 14px;
    color: var(--neon-white) !important;
    font-family: var(--font-mono);
    font-size: 13px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    backdrop-filter: blur(15px);
    -webkit-appearance: none;
    appearance: none;
    outline: none;
}

select.form-control-neural {
    background-image: linear-gradient(45deg, transparent 50%, var(--neon-cyan) 50%),
        linear-gradient(135deg, var(--neon-cyan) 50%, transparent 50%);
    background-position: calc(100% - 20px) 50%, calc(100% - 15px) 50%;
    background-size: 5px 5px, 5px 5px;
    background-repeat: no-repeat;
    padding-right: 40px;
}

input:focus,
textarea:focus,
select:focus,
.form-control-neural:focus {
    border-color: var(--neon-cyan) !important;
    background: rgba(13, 17, 23, 0.9) !important;
    box-shadow: 0 0 25px rgba(57, 211, 242, 0.15);
    transform: translateY(-1px);
}

::placeholder {
    color: var(--text-muted);
    opacity: 0.5;
}

select option {
    background: var(--bg-canvas);
    color: var(--text-primary);
    padding: 12px;
}