/* ===== LAYOUT ===== */
.login-page {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: linear-gradient(180deg, var(--header-bg) 0%, var(--header-bg) 40%, var(--colour-bg) 40%);
}
.login-card {
    width: 100%;
    max-width: 400px;
    padding: 2rem 1.5rem;
    background-color: var(--colour-card);
    border: 1px solid var(--colour-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-raised);
}

/* ===== HEADER ===== */
.login-header { text-align: center; margin-bottom: 2rem; }
.login-header h1 { font-size: 1.5rem; color: var(--colour-text); }
.login-header p { color: var(--colour-text-muted); }

/* ===== FORM ===== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
}
.form-group label { font-size: 0.95rem; font-weight: 600; color: var(--colour-text); }
.form-group input {
    padding: 0.85rem 1rem;
    font-size: 1.1rem; /* 16px+ stops iPhone zoom */
    font-family: inherit;
    color: var(--colour-text);
    background-color: var(--colour-input-bg);
    border: 1px solid var(--colour-border);
    border-radius: var(--radius);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input:focus {
    outline: none;
    border-color: var(--colour-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
#login-pin { letter-spacing: 0.4em; }

/* ===== ERROR ===== */
.login-error {
    min-height: 3rem;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: var(--colour-error);
    text-align: center;
}

/* ===== BIGGER SCREENS ===== */
@media (min-width: 600px) {
    .login-card { padding: 2.5rem 2rem; }
}