/* Design tokens */
:root {
    --font-body: 'Geist', 'Helvetica Neue', sans-serif;
    --font-mono: 'Geist Mono', 'Courier New', monospace;

    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
    --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
    --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;
    --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
    --bg: #0f0f0f;
    --surface: #161616;
    --surface-2: #1c1c1c;
    --surface-3: #242424;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.14);
    --text: #e8e8e8;
    --text-muted: #888;
    --text-faint: #555;
    --primary: #25d366;
    --primary-hover: #1db954;
    --primary-dim: rgba(37, 211, 102, 0.12);
    --danger: #f04747;
    --danger-dim: rgba(240, 71, 71, 0.12);
    --warning: #f59e0b;
    --warning-dim: rgba(245, 158, 11, 0.12);
    --info: #3b82f6;
    --info-dim: rgba(59, 130, 246, 0.12);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
}

[data-theme="light"] {
    --bg: #f5f5f5;
    --surface: #ffffff;
    --surface-2: #f9f9f9;
    --surface-3: #f0f0f0;
    --border: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.14);
    --text: #111;
    --text-muted: #555;
    --text-faint: #999;
    --primary: #16a34a;
    --primary-hover: #15803d;
    --primary-dim: rgba(22, 163, 74, 0.1);
    --danger: #dc2626;
    --danger-dim: rgba(220, 38, 38, 0.1);
    --warning: #d97706;
    --warning-dim: rgba(217, 119, 6, 0.1);
    --info: #2563eb;
    --info-dim: rgba(37, 99, 235, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--text);
    background: var(--bg);
    min-height: 100dvh;
    -webkit-font-smoothing: antialiased;
}

button {
    cursor: pointer;
    font: inherit;
    border: none;
    background: none;
}

a,
button,
input,
select {
    transition: all var(--transition);
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}