/* ===================================
   HPC Dashboard - Theme & Foundation
   Grafana-inspired dark monitoring UI
   =================================== */

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

:root {
    /* Core palette */
    --bg-primary: #0b0c0e;
    --bg-secondary: #111217;
    --bg-panel: #181b1f;
    --bg-panel-hover: #1e2127;
    --bg-input: #0e1012;

    /* Borders */
    --border: #2c3235;
    --border-hover: #3d4145;
    --border-active: #00d4aa;

    /* Accent colors */
    --green: #00d4aa;
    --green-dim: rgba(0, 212, 170, 0.15);
    --green-glow: rgba(0, 212, 170, 0.25);
    --blue: #3274d9;
    --blue-dim: rgba(50, 116, 217, 0.15);
    --orange: #ff9830;
    --orange-dim: rgba(255, 152, 48, 0.15);
    --red: #f2495c;
    --red-dim: rgba(242, 73, 92, 0.15);
    --yellow: #fade2a;
    --purple: #8a6bc1;

    /* Text */
    --text-primary: #d8d9da;
    --text-secondary: #8e8e8e;
    --text-muted: #5a5e66;
    --text-bright: #ffffff;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', 'Consolas', monospace;

    /* Sizing */
    --topbar-h: 56px;
    --sidebar-w: 56px;
    --sidebar-w-expanded: 200px;
    --mobile-nav-h: 60px;

    /* Transitions */
    --t-fast: 0.15s ease;
    --t-base: 0.25s ease;
    --t-slow: 0.4s ease;

    /* Shadows */
    --shadow-panel: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-modal: 0 16px 64px rgba(0, 0, 0, 0.6);
}

html {
    scroll-behavior: smooth;
    font-size: 14px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow: hidden;
    height: 100vh;
}

a {
    color: var(--green);
    text-decoration: none;
    transition: color var(--t-fast);
}

a:hover {
    color: var(--text-bright);
}

img {
    display: block;
    max-width: 100%;
}

button {
    font-family: var(--font-sans);
    cursor: pointer;
}

pre, code {
    font-family: var(--font-mono);
}

::selection {
    background: var(--green-dim);
    color: var(--green);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* Utility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}