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

:root {
    --bg: #09090b;
    --surface: #111113;
    --surface-elevated: #18181b;
    --border: rgba(255, 255, 255, 0.08);
    --text: #fafafa;
    --text-muted: #a1a1aa;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --danger: #f87171;
    --radius: 12px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color-scheme: dark;
}

[data-theme="light"] {
    --bg: #f4f4f5;
    --surface: #ffffff;
    --surface-elevated: #fafafa;
    --border: rgba(0, 0, 0, 0.1);
    --text: #18181b;
    --text-muted: #52525b;
    color-scheme: light;
}

html, body {
    min-height: 100%;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.sb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface-elevated);
    color: var(--text);
    font: inherit;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
}
.sb-btn:hover { border-color: rgba(255,255,255,.18); }
.sb-btn--primary { background: var(--accent); color: #082f49; border-color: transparent; font-weight: 600; }
.sb-btn--primary:hover { background: var(--accent-hover); color: #082f49; }
.sb-btn--ghost { background: transparent; }
.sb-btn--block { width: 100%; }
.sb-btn:disabled { opacity: .55; cursor: not-allowed; }

.sb-theme-toggle {
    width: 36px; height: 36px; border-radius: 8px;
    border: 1px solid var(--border); background: var(--surface-elevated);
    color: var(--text); cursor: pointer;
}

.sb-field { display: grid; gap: 6px; margin-bottom: 12px; }
.sb-field span { font-size: .82rem; color: var(--text-muted); }
.sb-field input, .sb-field select, .sb-field textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface-elevated);
    color: var(--text);
    font: inherit;
}
.sb-field textarea { resize: vertical; min-height: 72px; }

.sb-modal {
    border: none;
    padding: 0;
    background: transparent;
    max-width: none;
    max-height: none;
}
.sb-modal::backdrop { background: rgba(0,0,0,.55); }
.sb-modal__panel {
    width: min(440px, calc(100vw - 32px));
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
}
.sb-modal__panel h2 { margin-bottom: 8px; font-size: 1.15rem; }
.sb-modal__panel p { color: var(--text-muted); font-size: .9rem; margin-bottom: 16px; }
.sb-modal__actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }