/* ==========================================================================
   PanelProbe — Shared Foundation
   Self-hosted fonts, design tokens (dark + light), reset, and a11y defaults.
   Loaded by both the landing page and the studio before page styles.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Fonts (self-hosted, SIL OFL 1.1 — see assets/fonts/)
   -------------------------------------------------------------------------- */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400 800;
    font-display: swap;
    src: url('../fonts/inter-latin-var.woff2') format('woff2');
}

@font-face {
    font-family: 'JetBrains Mono';
    font-style: normal;
    font-weight: 400 700;
    font-display: swap;
    src: url('../fonts/jetbrains-mono-latin-var.woff2') format('woff2');
}

/* --------------------------------------------------------------------------
   2. Design Tokens
   -------------------------------------------------------------------------- */
:root {
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --radius-full: 9999px;

    --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);

    /* Dark theme (default) */
    --bg-base: #08090d;
    --bg-surface: #10131b;
    --bg-surface-elevated: #161b26;
    --bg-surface-hover: #1c2230;
    --bg-glass: rgba(12, 14, 20, 0.86);

    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-medium: rgba(255, 255, 255, 0.13);
    --border-highlight: rgba(0, 229, 255, 0.4);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #7c8aa0;

    --accent-cyan: #00e5ff;
    --accent-cyan-soft: rgba(0, 229, 255, 0.1);
    --accent-cyan-glow: rgba(0, 229, 255, 0.25);
    --accent-purple: #a78bfa;
    --accent-purple-soft: rgba(167, 139, 250, 0.1);
    --accent-emerald: #10b981;
    --accent-emerald-soft: rgba(16, 185, 129, 0.12);
    --accent-amber: #f59e0b;
    --accent-amber-soft: rgba(245, 158, 11, 0.14);
    --accent-rose: #f43f5e;
    --accent-rose-soft: rgba(244, 63, 94, 0.12);

    --on-accent: #041014;

    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
    --shadow-elevated: 0 16px 40px rgba(0, 0, 0, 0.55);

    color-scheme: dark;
}

[data-theme="light"] {
    --bg-base: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-elevated: #f1f5f9;
    --bg-surface-hover: #e2e8f0;
    --bg-glass: rgba(255, 255, 255, 0.92);

    --border-subtle: #e2e8f0;
    --border-medium: #cbd5e1;
    --border-highlight: rgba(2, 132, 199, 0.45);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;

    --accent-cyan: #0284c7;
    --accent-cyan-soft: rgba(2, 132, 199, 0.08);
    --accent-cyan-glow: rgba(2, 132, 199, 0.2);
    --accent-purple: #7c3aed;
    --accent-purple-soft: rgba(124, 58, 237, 0.08);
    --accent-emerald: #059669;
    --accent-emerald-soft: rgba(5, 150, 105, 0.1);
    --accent-amber: #b45309;
    --accent-amber-soft: rgba(180, 83, 9, 0.1);
    --accent-rose: #e11d48;
    --accent-rose-soft: rgba(225, 29, 72, 0.08);

    --on-accent: #ffffff;

    --shadow-card: 0 2px 10px rgba(15, 23, 42, 0.05);
    --shadow-elevated: 0 12px 32px rgba(15, 23, 42, 0.1);

    color-scheme: light;
}

/* --------------------------------------------------------------------------
   3. Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img, svg {
    display: block;
    flex-shrink: 0;
}

button {
    font: inherit;
    color: inherit;
}

[hidden] {
    display: none !important;
}

/* --------------------------------------------------------------------------
   Shared Elements
   -------------------------------------------------------------------------- */
kbd {
    display: inline-block;
    min-width: 1.6em;
    padding: 0 5px;
    font-family: var(--font-mono);
    font-size: 0.8em;
    font-weight: 600;
    line-height: 1.6;
    text-align: center;
    color: var(--text-primary);
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-medium);
    border-bottom-width: 2px;
    border-radius: 4px;
}

/* Wordmark: "Panel" in text color, "Probe" in the accent color */
.brand-accent {
    color: var(--accent-cyan);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.35; }
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* --------------------------------------------------------------------------
   4. Accessibility Defaults
   -------------------------------------------------------------------------- */
:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    z-index: 10000;
    background: var(--accent-cyan);
    color: var(--on-accent);
    padding: 8px 14px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus {
    top: 12px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}