:root {
    --blue-600: #2563eb;
    --blue-500: #3b82f6;
    --blue-100: #dbeafe;
    --gray-700: #374151;
    --gray-500: #6b7280;
    --gray-100: #f3f4f6;
}


* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--blue-100), #ffffff);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.card {
    width: 100%;
    max-width: 420px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0,0,0,.08);
    padding: 32px;
}

.logo {
    text-align: center;
    margin-bottom: 24px;
    font-size: 22px;
    font-weight: 700;
    color: var(--blue-600);
}

h1 {
    font-size: 18px;
    margin: 0 0 8px;
    color: var(--gray-700);
    text-align: center;
}

p {
    font-size: 14px;
    color: var(--gray-500);
    text-align: center;
    margin-bottom: 24px;
    line-height: 1.7;
}

.form-group {
    margin-bottom: 16px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: var(--gray-700);
}

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

input:focus {
    outline: none;
    border-color: var(--blue-500);
    box-shadow: 0 0 0 3px rgba(59,130,246,.2);
}

button {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: none;
    background: var(--blue-600);
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background .2s ease;
}

button:hover {
    background: var(--blue-500);
}

.footer-link {
    margin-top: 16px;
    text-align: center;
    font-size: 13px;
}

.footer-link a {
    color: var(--blue-600);
    text-decoration: none;
}

.footer-link a:hover {
    text-decoration: underline;
}

.alert {
    margin-bottom: 16px;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 14px;
    line-height: 1.7;
}

.alert.success {
    background: #ecfeff;
    color: #0369a1;
    border: 1px solid #7dd3fc;
}

.alert.error {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fca5a5;
}