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

body {
    font-family: Arial, sans-serif;
    background: #0f1720;
    color: #e5e7eb;
    min-height: 100vh;
}

.container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
}

.card {
    width: 100%;
    max-width: 520px;
    background: #18252f;
    border: 1px solid #27403c;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 8px 24px rgba(0,0,0,.35);
}

h1 {
    text-align: center;
    margin-bottom: 25px;
    color: #7ee787;
}

input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    background: #0f1720;
    border: 1px solid #31554f;
    color: #fff;
    border-radius: 8px;
}

input:focus {
    outline: none;
    border-color: #42d392;
}

button {
    width: 100%;
    border: none;
    cursor: pointer;
    border-radius: 8px;
}

button:hover {
    opacity: .95;
}

.action-btn,
button[type=submit] {
    background: #198754;
    color: #fff;
    padding: 14px;
    margin-bottom: 12px;
    font-size: 15px;
}

.action-btn:hover {
    background: #20a665;
}

.alert {
    margin-bottom: 15px;
    padding: 12px;
    border-radius: 8px;
    background: #7c2d12;
}

.success {
    background: #14532d;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.logout {
    color: #ff7b72;
    text-decoration: none;
}