:root {
    color: #132238;
    background:
        radial-gradient(circle at top, rgba(180, 202, 224, 0.45), transparent 35%),
        linear-gradient(180deg, #edf3f8 0%, #f7fafc 100%);
    font-family: 'Segoe UI', 'Noto Sans KR', sans-serif;
    line-height: 1.5;
    font-weight: 400;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-width: 320px;
    min-height: 100vh;
}

button,
input {
    font: inherit;
}

.app-shell {
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: 48px 24px;
}

.login-panel {
    width: min(100%, 560px);
    padding: 40px;
    border: 1px solid rgba(84, 111, 138, 0.18);
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 32px 80px rgba(32, 55, 79, 0.12);
}

.panel-heading h1 {
    margin: 0;
    font-size: clamp(2rem, 3vw, 2.8rem);
    line-height: 1.05;
}

.panel-heading p {
    margin: 12px 0 0;
    color: #516b86;
}

.login-form {
    display: grid;
    gap: 16px;
    margin-top: 28px;
}

.field {
    display: grid;
    gap: 8px;
}

.field label {
    color: #1c3954;
    font-size: 0.96rem;
    font-weight: 700;
}

.text-input {
    width: 100%;
    padding: 16px 18px;
    border: 1px solid rgba(96, 123, 149, 0.24);
    border-radius: 18px;
    background: #fdfefe;
    color: #132238;
    transition: all 160ms ease;
}

.text-input:focus {
    outline: none;
    border-color: #2f5f8f;
    box-shadow: 0 0 0 4px rgba(93, 137, 181, 0.14);
    transform: translateY(-1px);
}

.input-hint {
    margin: 0;
    min-height: 24px;
    color: #5c748d;
    font-size: 0.95rem;
}

.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 54px;
    padding: 0 20px;
    border: 0;
    border-radius: 18px;
    background: linear-gradient(180deg, #214e77 0%, #15395b 100%);
    color: #f8fbff;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 20px 40px rgba(22, 57, 92, 0.24);
    transition: all 160ms ease;
}

.primary-button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 24px 44px rgba(22, 57, 92, 0.3);
}

.primary-button:disabled {
    cursor: not-allowed;
    opacity: 0.54;
    box-shadow: none;
}

.status-card,
.success-panel {
    margin-top: 24px;
    padding: 20px 22px;
    border-radius: 22px;
    border: 1px solid rgba(96, 123, 149, 0.18);
}

.status-card {
    background: #f6f9fb;
}

.status-card strong {
    display: block;
    margin-bottom: 8px;
    color: #18334d;
}

.status-card p,
.success-panel p {
    margin: 0;
    color: #5a738d;
}

.success-panel {
    background: linear-gradient(180deg, #f3f8f5 0%, #edf5ef 100%);
    border-color: rgba(66, 131, 92, 0.18);
}

.success-label {
    margin-bottom: 8px;
    color: #38694a;
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

.success-panel h3 {
    margin: 0 0 8px;
    color: #12301f;
    font-size: 1.4rem;
}

.hidden {
    display: none;
}

@media (max-width: 640px) {
    .app-shell {
        padding: 24px 16px;
    }

    .login-panel {
        padding: 28px 22px;
        border-radius: 24px;
    }
}