:root {
    --primary: #7a3e1d;
    --primary-dark: #5c2d14;
    --primary-light: #f6ece4;
    --accent: #c8923f;
    --bg: #f5f3f0;
    --surface: #ffffff;
    --text: #2b2420;
    --text-muted: #7b716a;
    --border: #e4ddd6;
    --danger: #c0392b;
    --danger-bg: #fdecea;
    --sidebar-width: 250px;
    --topbar-height: 64px;
    --radius: 8px;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
    line-height: 1.5;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

.btn {
    display: inline-block;
    padding: 10px 18px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    transition: background 0.2s, color 0.2s;
}

.btn-sm {
    padding: 7px 14px;
    font-size: 14px;
}

.btn-block {
    width: 100%;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.btn-light {
    background: #efeae5;
    color: var(--text);
}

.btn-light:hover {
    background: var(--border);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-danger:hover {
    background: #a02f23;
}

.text-success {
    color: #2e7d4f;
}

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