:root {
    --acc-magenta: #a4197c;
    --acc-magenta-dark: #87105f;
    --acc-navy: #2d1b69;
    --acc-blue: #3d7cb5;
    --acc-ink: #1f2230;
    --acc-muted: #6b7280;
    --acc-border: #e3e5ec;
    --acc-danger: #c0274a;
    --acc-danger-bg: #fdecef;
    --acc-success: #1d7a4d;
    --acc-success-bg: #e8f6ee;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

.acc-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 1.25rem;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: radial-gradient(1100px 600px at 12% -10%, rgba(164, 25, 124, 0.22), transparent 60%),
                radial-gradient(900px 600px at 100% 110%, rgba(61, 124, 181, 0.28), transparent 55%),
                linear-gradient(135deg, #f4f1f8 0%, #eef2f7 100%);
}

.acc-card {
    width: 100%;
    max-width: 430px;
    background: #ffffff;
    border-radius: 20px;
    padding: 2.5rem 2.25rem 2.25rem;
    box-shadow: 0 24px 60px -20px rgba(45, 27, 105, 0.35),
                0 4px 14px rgba(31, 34, 48, 0.06);
}

.acc-logo {
    display: block;
    width: 200px;
    max-width: 70%;
    height: auto;
    margin: 0 auto 1.5rem;
}

.acc-heading {
    margin: 0;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--acc-navy);
}

.acc-subheading {
    margin: 0.4rem 0 1.75rem;
    text-align: center;
    font-size: 0.925rem;
    color: var(--acc-muted);
}

.acc-field {
    margin-bottom: 1.1rem;
}

.acc-label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--acc-ink);
}

.acc-input {
    width: 100%;
    padding: 0.75rem 0.9rem;
    font-size: 0.95rem;
    color: var(--acc-ink);
    background: #fbfbfd;
    border: 1.5px solid var(--acc-border);
    border-radius: 11px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.acc-input::placeholder {
    color: #aab0bd;
}

.acc-input:focus {
    outline: none;
    background: #ffffff;
    border-color: var(--acc-magenta);
    box-shadow: 0 0 0 3.5px rgba(164, 25, 124, 0.14);
}

.acc-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.35rem;
    font-size: 0.875rem;
    color: var(--acc-ink);
}

.acc-check input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--acc-magenta);
}

.acc-btn {
    width: 100%;
    padding: 0.8rem 1rem;
    font-size: 0.975rem;
    font-weight: 600;
    color: #ffffff;
    background: linear-gradient(135deg, var(--acc-magenta) 0%, var(--acc-magenta-dark) 100%);
    border: none;
    border-radius: 11px;
    cursor: pointer;
    transition: transform 0.08s ease, box-shadow 0.15s ease, filter 0.15s ease;
    box-shadow: 0 10px 22px -8px rgba(164, 25, 124, 0.6);
}

.acc-btn:hover {
    filter: brightness(1.06);
}

.acc-btn:active {
    transform: translateY(1px);
}

.acc-divider {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin: 1.5rem 0;
    color: #9aa0ad;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
}

.acc-divider::before,
.acc-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--acc-border);
}

.acc-links {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--acc-muted);
}

.acc-links p {
    margin: 0.5rem 0;
}

.acc-link {
    color: var(--acc-magenta);
    font-weight: 600;
    text-decoration: none;
}

.acc-link:hover {
    text-decoration: underline;
}

.acc-alert {
    margin-bottom: 1.25rem;
    padding: 0.7rem 0.9rem;
    border-radius: 10px;
    font-size: 0.875rem;
    border: 1px solid transparent;
}

.acc-alert-danger {
    color: var(--acc-danger);
    background: var(--acc-danger-bg);
    border-color: rgba(192, 39, 74, 0.25);
}

.acc-alert-success {
    color: var(--acc-success);
    background: var(--acc-success-bg);
    border-color: rgba(29, 122, 77, 0.25);
}

.acc-validation {
    display: block;
    margin-top: 0.3rem;
    font-size: 0.8rem;
    color: var(--acc-danger);
}

.acc-passkey-btn {
    width: 100%;
    padding: 0.7rem 1rem;
    font-size: 0.925rem;
    font-weight: 600;
    color: var(--acc-navy);
    background: #ffffff;
    border: 1.5px solid var(--acc-border);
    border-radius: 11px;
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.acc-passkey-btn:hover {
    border-color: var(--acc-blue);
    background: #f7fafc;
}