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

html {
    width: 100%;
    min-height: 100%;
}

body.admin-body {
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Segoe UI", sans-serif;
    background:
            radial-gradient(circle at top left, rgba(66, 133, 244, 0.22), transparent 32rem),
            radial-gradient(circle at bottom right, rgba(0, 180, 216, 0.16), transparent 30rem),
            #111;
    color: #fff;
}

.login-page,
.admin-page {
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-card,
.admin-card {
    width: 100%;
    max-width: 420px;
    padding: 2.4rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.075);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

.login-header,
.admin-header {
    margin-bottom: 2rem;
}

.eyebrow {
    margin-bottom: 0.7rem;
    color: #8ab4ff;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.16em;
}

h1 {
    margin-bottom: 0.7rem;
    font-size: clamp(1.8rem, 5vw, 2.3rem);
    line-height: 1.2;
    letter-spacing: -0.04em;
}

.description {
    color: rgba(255, 255, 255, 0.68);
    font-size: 0.95rem;
    line-height: 1.6;
}

.admin-form {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.form-group label {
    color: rgba(255, 255, 255, 0.78);
    font-size: 0.9rem;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    height: 48px;
    padding: 0 0.95rem;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 12px;
    outline: none;
    background: rgba(0, 0, 0, 0.28);
    color: #fff;
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

.form-group input:focus {
    border-color: rgba(138, 180, 255, 0.85);
    background: rgba(0, 0, 0, 0.38);
    box-shadow: 0 0 0 4px rgba(138, 180, 255, 0.16);
}

.primary-button,
.secondary-button {
    width: 100%;
    height: 50px;
    border: 0;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.18s ease, opacity 0.18s ease, box-shadow 0.18s ease;
}

.primary-button {
    margin-top: 0.4rem;
    background: linear-gradient(135deg, #4c8dff, #6de0ff);
    color: #08111f;
    box-shadow: 0 14px 34px rgba(76, 141, 255, 0.28);
}

.secondary-button {
    margin-top: 1.4rem;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.16);
}

.primary-button:hover,
.secondary-button:hover {
    transform: translateY(-1px);
    opacity: 0.94;
}

.primary-button:active,
.secondary-button:active {
    transform: translateY(0);
}

.error-message,
.logout-message {
    margin-bottom: 1.2rem;
    padding: 0.85rem 0.95rem;
    border-radius: 12px;
    font-size: 0.9rem;
    line-height: 1.5;
}

.error-message {
    border: 1px solid rgba(255, 99, 99, 0.32);
    background: rgba(255, 99, 99, 0.12);
    color: #ffb4b4;
}

.logout-message {
    border: 1px solid rgba(109, 224, 255, 0.28);
    background: rgba(109, 224, 255, 0.1);
    color: #b8f2ff;
}

.info-box {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    padding: 1.1rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    background: rgba(0, 0, 0, 0.22);
}

.info-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.info-label {
    color: rgba(255, 255, 255, 0.58);
    font-size: 0.9rem;
}

.info-value {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 700;
    text-align: right;
    word-break: break-all;
}

@media (max-width: 480px) {
    .login-page,
    .admin-page {
        padding: 1rem;
    }

    .login-card,
    .admin-card {
        padding: 1.6rem;
        border-radius: 20px;
    }

    .info-row {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.35rem;
    }

    .info-value {
        text-align: left;
    }
}