:root {
    --ink: #10233f;
    --teal: #004a52;
    --slate: #5b6b7c;
    --line: rgba(16, 35, 63, 0.12);
    --display: "Syne", sans-serif;
    --body: "DM Sans", sans-serif;
}

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

body {
    min-height: 100vh;
    font-family: var(--body);
    color: var(--ink);
    background:
        radial-gradient(circle at 10% 20%, rgba(15, 118, 110, 0.18), transparent 30%),
        linear-gradient(145deg, #e7eef3, #f7fafb 55%, #eef5f4);
}

.login-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
}

.login-aside {
    padding: 4rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: linear-gradient(160deg, #0b1220, #004a52);
    color: #fff;
}

.eyebrow {
    font-family: var(--display);
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.login-aside h1 {
    font-family: var(--display);
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    line-height: 1.15;
    margin-bottom: 1rem;
    max-width: 14ch;
}

.login-aside p {
    max-width: 34rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.82);
}

.login-main {
    display: grid;
    place-items: center;
    padding: 2rem;
}

.login-card {
    width: min(100%, 420px);
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--line);
    border-radius: 1.25rem;
    padding: 2rem;
    box-shadow: 0 24px 50px rgba(16, 35, 63, 0.1);
    display: grid;
    gap: 0.95rem;
}

.login-card h2 {
    font-family: var(--display);
    font-size: 1.7rem;
}

.hint, .back-link { color: var(--slate); font-size: 0.95rem; }

label {
    display: grid;
    gap: 0.4rem;
    font-weight: 600;
    font-size: 0.92rem;
}

input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 0.85rem 0.95rem;
    border: 1px solid var(--line);
    border-radius: 0.8rem;
    font: inherit;
    background: #fff;
}

.remember {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    font-weight: 500;
}

.error {
    color: #b91c1c;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 0.7rem;
    padding: 0.7rem 0.85rem;
    font-size: 0.9rem;
}

button {
    border: 0;
    border-radius: 0.85rem;
    padding: 0.9rem 1rem;
    background: #004a52;
    color: #fff;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

button:hover { background: #003840; color: #fff; }
button:disabled { opacity: 0.7; cursor: wait; }

.back-link {
    text-align: center;
    text-decoration: none;
}

.back-link:hover { color: var(--teal); }

@media (max-width: 900px) {
    .login-shell { grid-template-columns: 1fr; }
    .login-aside { padding: 2rem; min-height: 34vh; }
}