:root {
    --p: #0F172A;       /* 메인 다크 차콜 */
    --a: #3B82F6;       /* 포인트 블루 */
    --border: #E2E8F0;
    --rad: 16px;
}
body {
    background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Malgun Gothic', '맑은 고딕', AppleGothic, sans-serif;
    margin: 0;
    padding: 15px;
}
.login-container {
    width: 100%;
    max-width: 340px;
}
.card {
    border: none !important;
    border-radius: var(--rad) !important;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3) !important;
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(8px);
    overflow: hidden;
}
.form-control {
    border: 1px solid var(--border) !important;
    border-radius: 8px !important;
    padding: 12px !important;
    font-size: 13px !important;
    outline: none;
    transition: all 0.2s !important;
}
.form-control:focus {
    border-color: var(--a) !important;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15) !important;
}
.btn-primary {
    background-color: var(--p) !important;
    border-color: var(--p) !important;
    padding: 12px !important;
    border-radius: 8px !important;
    font-weight: 700 !important;
    font-size: 14px !important;
    transition: background 0.2s !important;
}
.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: #172554 !important;
    border-color: #172554 !important;
}
.form-label {
    display: block;
    font-size: 11px;
    font-weight: 700;
    color: var(--p);
    margin-bottom: 6px;
    text-transform: uppercase;
}