:root {
    --primary: #2563eb;
    --danger: #dc2626;
    --bg: #f5f7fa;
    --text: #111827;
    --border: #e5e7eb;
}

body {
    background: var(--bg);
    color: var(--text);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: white;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar a {
    text-decoration: none;
    color: #333;
    margin: 0 10px;
    font-weight: 500;
}

.navbar a:hover {
    color: var(--primary);
}

.logo {
    font-weight: 700;
    font-size: 18px;
}

.logout {
    color: var(--danger);
}

button {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 10px 14px;
    font-weight: 600;
}

button:disabled {
    background: #9ca3af;
}

input,
select,
textarea {
    border: 1px solid var(--border);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
}

button {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 10px 14px;
    font-weight: 600;
    transition: 0.2s;
}

button:hover {
    opacity: 0.9;
}

button:disabled {
    background: #9ca3af;
}

input,
select,
textarea {
    border: 1px solid var(--border);
    transition: 0.2s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;

    background: #0f172a;
    color: white;

    padding: 12px 30px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.nav-left .logo {
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 1px;
}

.nav-center a {
    margin: 0 12px;
    text-decoration: none;
    color: #cbd5f5;
    font-weight: 500;
    transition: 0.2s;
}

.nav-center a:hover {
    color: white;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-right span {
    font-size: 14px;
    opacity: 0.8;
}

.logout {
    background: #ef4444;
    padding: 6px 12px;
    border-radius: 6px;
    color: white;
    text-decoration: none;
    font-size: 13px;
}

.logout:hover {
    background: #dc2626;
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
}


.btn-blue {
    background: #007bff;
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: 5px;
    cursor: pointer;
}

.btn-green {
    background: #1acf44;
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: 5px;
    cursor: pointer;
}

.btn-red {
    background: #fc041d;
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: 5px;
    cursor: pointer;
}