/* -------------------- General Reset -------------------- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    min-height: 100vh;
    background-color: #f4f6f8;
}

/* -------------------- Sidebar -------------------- */
.sidebar {
    width: 250px;
    background-color: #2c3e50;
    color: #f1c232;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    transition: width 0.3s;
    z-index: 1000;
}

.sidebar.collapsed {
    width: 70px;
}

.sidebar h2 {
    text-align: center;
    padding: 20px 0;
    font-size: 1.5em;
    border-bottom: 1px solid #f1c232;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 20px 0;
    flex: 1;
}

.sidebar ul li a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: #ecf0f1;
    text-decoration: none;
    transition: background 0.3s;
}

.sidebar ul li a i {
    margin-right: 15px;
    min-width: 20px;
    text-align: center;
}

.sidebar ul li a:hover,
.sidebar ul li a.active {
    background-color: #1abc9c;
    color: #fff;
}

/* -------------------- Main Content -------------------- */
.main-content {
    flex: 1;
    padding: 20px;
    margin-left: 250px;
    transition: margin-left 0.3s;
}

.sidebar.collapsed ~ .main-content {
    margin-left: 70px;
}

/* -------------------- Topbar -------------------- */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.topbar h2 {
    color: #34495e;
}

.topbar .profile {
    display: flex;
    align-items: center;
}

.topbar .profile img.profile-pic {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 10px;
}

.topbar .profile span {
    margin-right: 15px;
    font-weight: bold;
    color: #2c3e50;
}

.topbar .profile .btn {
    padding: 6px 12px;
    background-color: #e74c3c;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
}

/* -------------------- Dashboard Cards -------------------- */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    margin-bottom: 10px;
    color: #34495e;
}

.card p {
    font-size: 1.5em;
    font-weight: bold;
    color: #1abc9c;
}

/* -------------------- Charts -------------------- */
.charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.chart-container {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.chart-container h3 {
    margin-bottom: 15px;
    color: #34495e;
}

/* -------------------- Login Page -------------------- */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #ecf0f1;
    padding: 20px;
}

.login-box {
    background-color: #fff;
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-box h2 {
    margin-bottom: 30px;
    color: #34495e;
    font-size: 1.8em;
}

.login-box .form-group {
    margin-bottom: 20px;
    text-align: left;
}

.login-box label {
    display: block;
    margin-bottom: 5px;
    color: #2c3e50;
    font-weight: 500;
}

.login-box input {
    width: 100%;
    padding: 12px;
    border-radius: 5px;
    border: 1px solid #ccc;
    outline: none;
    transition: border-color 0.3s;
}

.login-box input:focus {
    border-color: #1abc9c;
}

.login-box .btn {
    width: 100%;
    padding: 12px;
    background-color: #1abc9c;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    transition: background 0.3s;
}

.login-box .btn:hover {
    background-color: #16a085;
}

.error-msg {
    color: #e74c3c;
    margin-bottom: 15px;
    font-weight: bold;
    text-align: center;
}

/* -------------------- Responsive -------------------- */
@media (max-width: 768px) {
    .charts {
        grid-template-columns: 1fr;
    }

    .sidebar {
        transform: translateX(-250px);
        position: fixed;
        z-index: 1000;
        height: 100%;
    }

    .sidebar.collapsed {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding-top: 60px;
    }

    .login-container {
        padding: 10px;
    }
}