body {
    background: linear-gradient(135deg, #f6f8fb 0%, #e9f6ff 100%);
    font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", Segoe UI, Roboto, Arial, "Noto Sans KR", sans-serif;
    color: #1f2937;
    line-height: 1.55;
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-section {
    background: linear-gradient(145deg, #172E6C, #6FC8F8);
    color: #fff;
    position: relative;
    overflow: hidden;
    box-shadow: inset 0 0 80px rgba(0, 0, 0, 0.1);
}

.hero-section::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    bottom: -150px;
    right: -100px;
    z-index: 0;
}

.hero-section h3 {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.15;
    position: relative;
    z-index: 1;
}

.hero-section p {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    position: relative;
    z-index: 1;
    font-size: 1.2rem;
}

.login-container {
    box-shadow: 0 20px 70px rgba(2, 8, 20, 0.1), 0 15px 40px rgba(2, 8, 20, 0.08);
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.login-btn {
    background: linear-gradient(145deg, #6FC8F8, #58a5d1);
    border: none;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.3px;
    transition: all 0.3s ease;
    padding: 12px !important;
    box-shadow: 0 6px 15px rgba(111, 200, 248, 0.25);
    color: white;
    text-align: center;
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
    display: block;
}

.login-btn:hover {
    background: linear-gradient(145deg, #58a5d1, #4597c5);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(111, 200, 248, 0.4);
}

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

.form-floating > .form-control {
    padding: 1.5rem 1rem;
    height: calc(3.75rem + 2px);
    border: 2px solid #e0e7ee;
    transition: all 0.25s ease;
}

.form-floating > .form-control:focus {
    border-color: #6FC8F8;
    box-shadow: 0 0 0 0.25rem rgba(111, 200, 248, 0.25);
}

.form-floating > label {
    padding: 1.5rem 1rem;
    color: #6b7280;
    font-weight: 500;
}

.form-label {
    font-weight: 600;
    color: #6b7280;
    font-size: 0.95rem;
    margin-bottom: 8px;
    display: inline-block;
}

.form-control {
    border: 2px solid #e0e7ee;
    border-radius: 8px;
    padding: 12px 16px;
    transition: all 0.25s ease;
    background-color: #ffffff;
    font-size: 1rem;
}

.form-control:focus {
    border-color: #6FC8F8;
    box-shadow: 0 0 0 0.25rem rgba(111, 200, 248, 0.25);
}

.form-control::placeholder {
    color: #a0aec0;
    opacity: 0.7;
}

.login-text-menu {
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    list-style: none;
    color: #8a8a8a;
    font-size: 1rem;
    font-weight: 500;
    margin-top: 2rem !important;
}

.login-text-menu li {
    display: flex;
    align-items: center;
}

.login-text-menu li:not(:last-child)::after {
    content: '|';
    display: inline-block;
    margin: 0 12px;
    color: #bdbdbd;
    font-size: 1rem;
    font-weight: 400;
    vertical-align: middle;
}

.login-text-menu a {
    color: #6b7280;
    text-decoration: none;
    transition: all 0.25s ease;
    padding: 5px 10px;
    border-radius: 4px;
}

.login-text-menu a:hover {
    color: #6FC8F8;
    background-color: rgba(111, 200, 248, 0.08);
}

@media (max-width: 767.98px) {
    body {
        padding: 1.5rem 0;
    }

    .login-container {
        border-radius: 15px;
    }

    .hero-section {
        border-top-left-radius: 15px;
        border-top-right-radius: 15px;
        padding: 2.5rem 1.5rem !important;
    }

    .hero-section h3 {
        font-size: 1.8rem;
    }

    .login-text-menu {
        flex-direction: column;
        gap: 0.5rem;
        align-items: center;
    }

    .login-text-menu li:not(:last-child)::after {
        content: '';
        margin: 0;
    }
}