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

/* BODY */
body {
    font-family: 'Inter', sans-serif;
    background: #f4f7fb;
    color: #1f2937;
}

/* TOPBAR */
.topbar {
    position: fixed;
    top: 0;
    left: 240px;
    right: 0;
    height: 64px;
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 25px;
    z-index: 100;
}

.brand {
    font-size: 20px;
    font-weight: 800;
    color: #2563eb;
}

.user-info {
    font-size: 14px;
    color: #6b7280;
}

.user-info a {
    margin-left: 15px;
    color: #ef4444;
    text-decoration: none;
}

/* SIDEBAR */
.sidebar {
    width: 240px;
    height: 100vh;
    background: linear-gradient(180deg, #111827, #1f2937);
    position: fixed;
    left: 0;
    top: 0;
    padding: 20px 15px;
}

.sidebar-title {
    color: #ffffff;
    text-align: center;
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 30px;
}

.sidebar a {
    display: block;
    color: #d1d5db;
    padding: 12px 15px;
    border-radius: 10px;
    margin-bottom: 8px;
    text-decoration: none;
    transition: 0.2s;
}

.sidebar a:hover,
.sidebar a.active {
    background: #2563eb;
    color: #fff;
}

/* CONTENT */
.content {
    margin-left: 240px;
    padding: 90px 25px 25px;
}

/* PAGE TITLE */
.page-title {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 25px;
}

/* CARDS */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.card {
    background: #ffffff;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.06);
}

.card h3 {
    font-size: 14px;
    color: #6b7280;
}

.card p {
    font-size: 26px;
    font-weight: 800;
    margin-top: 10px;
}

/* TABLE CARD */
.table-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.06);
    overflow-x: auto;
}

/* TABLE */
table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 12px;
    background: #f9fafb;
    font-size: 13px;
    color: #6b7280;
}

td {
    padding: 12px;
    border-top: 1px solid #e5e7eb;
    font-size: 14px;
}

/* BUTTONS */
.btn {
    display: inline-block;
    padding: 10px 15px;
    border-radius: 10px;
    background: #2563eb;
    color: #fff;
    text-decoration: none;
    margin-right: 8px;
    margin-top: 10px;
}

.btn:hover {
    background: #1d4ed8;
}

.btn-danger {
    background: #ef4444;
}

.btn-success {
    background: #16a34a;
}

/* FORMS */
form {
    background: #ffffff;
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.06);
    margin-bottom: 20px;
}

input,
select,
textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    border: 1px solid #d1d5db;
    border-radius: 10px;
    font-size: 14px;
}

/* LOGIN / REGISTER BOX */
.login-box,
.register-box {
    width: 100%;
    max-width: 420px;
    background: #fff;
    padding: 30px;
    border-radius: 18px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

/* ALERTS */
.message-success {
    background: #dcfce7;
    color: #166534;
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 15px;
}

.message-error {
    background: #fee2e2;
    color: #991b1b;
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 15px;
}

/* FOOTER */
footer {
    margin-left: 240px;
    background: #ffffff;
    padding: 15px 25px;
    border-top: 1px solid #e5e7eb;
    font-size: 14px;
    color: #6b7280;
}

/* RESPONSIVE */
@media (max-width: 768px) {

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }

    .topbar {
        left: 0;
        position: relative;
    }

    .content {
        margin-left: 0;
        padding: 20px;
    }

    footer {
        margin-left: 0;
        text-align: center;
    }
}
/* DARK MODE */
body.dark-mode {
    background: #0f172a;
    color: #e5e7eb;
}

body.dark-mode .topbar,
body.dark-mode .card,
body.dark-mode .table-card,
body.dark-mode form,
body.dark-mode footer {
    background: #1e293b;
    color: #e5e7eb;
    border-color: #334155;
}

body.dark-mode th {
    background: #334155;
    color: #e5e7eb;
}

body.dark-mode td {
    border-color: #334155;
}

body.dark-mode input,
body.dark-mode select,
body.dark-mode textarea {
    background: #0f172a;
    color: #fff;
    border-color: #475569;
}

.dark-toggle {
    padding: 8px 12px;
    border-radius: 10px;
    background: #111827;
    color: #fff;
    border: none;
    cursor: pointer;
}