body {
    margin: 0;
    padding: 0;
    background: #020617;
    color: white;
    font-family: Arial, sans-serif;
}

/* LOGIN */

.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-panel {
    width: 360px;
    padding: 35px;
    border-radius: 16px;
    background: #0f172a;
    border: 1px solid #2563eb;
    box-shadow: 0 0 25px rgba(37,99,235,0.4);
}

.login-panel h1 {
    text-align: center;
    margin-bottom: 25px;
}

input {
    width: 100%;
    padding: 14px;
    margin-bottom: 16px;
    box-sizing: border-box;
    border-radius: 10px;
    border: 1px solid #2563eb;
    background: #111827;
    color: white;
}

button {
    cursor: pointer;
}

.login-panel button {
    width: 100%;
}

/* DASHBOARD */

.dashboard-panel {
    width: 92%;
    max-width: 1400px;
    margin: 40px auto;
    padding: 30px;
    border-radius: 18px;
    background: #0f172a;
    border: 1px solid #2563eb;
    box-shadow: 0 0 30px rgba(37,99,235,0.4);
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.logout-btn {
    text-decoration: none;
    color: white;
    background: #1d4ed8;
    padding: 12px 18px;
    border-radius: 10px;
}

.quest-tabs,
.class-tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 25px;
}

.quest-btn,
.class-btn {
    background: #111827;
    border: 1px solid #2563eb;
    color: white;
    padding: 12px 18px;
    border-radius: 10px;
}

.active-btn,
.active-class {
    background: #2563eb;
}

.quest-content,
.class-content {
    display: none;
}

.active-content {
    display: block;
}

.note-box {
    background: #111827;
    border: 1px solid #1d4ed8;
    border-radius: 14px;
    padding: 25px;
    line-height: 1.8;
    margin: 20px 0;
}

.error {
    color: #f87171;
    margin-bottom: 15px;
}