:root {
    --bg: #eef3fb;
    --primary: #143f86;
    --primary-strong: #0d2f65;
    --muted: #61728f;
    --border: #d8e2f0;
    --danger: #b42318;
    --surface: rgba(255, 255, 255, 0.94);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    color: #1a2840;
    background:
        radial-gradient(circle at top left, rgba(20, 63, 134, 0.13), transparent 32%),
        radial-gradient(circle at bottom right, rgba(75, 127, 211, 0.12), transparent 24%),
        linear-gradient(180deg, #f4f7fc 0%, var(--bg) 100%);
}

.page-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-card {
    width: min(460px, 100%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 26px;
    padding: 28px;
    box-shadow: 0 30px 60px rgba(20, 63, 134, 0.14);
}

.login-brand {
    margin-bottom: 22px;
}

.login-brand h1 {
    margin: 0;
    color: var(--primary);
    font-size: clamp(30px, 7vw, 38px);
    line-height: 1.05;
}

.login-brand p {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 16px;
}

.form-grid {
    display: grid;
    gap: 16px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-size: 15px;
    font-weight: 700;
    color: var(--primary-strong);
}

input[type="text"],
input[type="password"] {
    width: 100%;
    min-height: 52px;
    border: 1px solid #b7c8df;
    border-radius: 14px;
    padding: 14px 16px;
    font-size: 16px;
    outline: none;
    transition: border-color .15s ease, box-shadow .15s ease;
}

input:focus {
    border-color: #4b7fd3;
    box-shadow: 0 0 0 4px rgba(75, 127, 211, 0.15);
}

button {
    appearance: none;
    border: 0;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    padding: 15px 18px;
    cursor: pointer;
    box-shadow: 0 12px 24px rgba(20, 63, 134, 0.18);
}

button:hover { background: var(--primary-strong); }

.alert {
    border-radius: 14px;
    padding: 13px 15px;
    background: #fef3f2;
    border: 1px solid #fecdca;
    color: var(--danger);
    margin-bottom: 16px;
    font-size: 14px;
}

.login-footer {
    margin-top: 16px;
    color: var(--muted);
    font-size: 14px;
    text-align: center;
}

@media (max-width: 520px) {
    .page-wrap { padding: 14px; }
    .login-card {
        border-radius: 20px;
        padding: 22px 18px;
    }
}