:root {
    color: #132238;
    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;
    background-color: #0f3d2e; /* 최하단 바탕색: 다크 그린 */
    display: flex;
    align-items: center;
    justify-content: center;
}

button,
input {
    font: inherit;
}

/* 배경 이미지를 담는 큰 박스 */
.app-shell {
    position: relative;
    width: 98vw; /* 좌우 길이를 더 늘려 배경 노출 감소 */
    height: 96vh; /* 상하 균형을 위해 높이도 살짝 조정 */
    background: 
        linear-gradient(rgba(15, 61, 46, 0.4), rgba(15, 61, 46, 0.6)),
        url('https://images.unsplash.com/photo-1522071820081-009f0129c71c?auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    border: 4px solid rgba(255, 255, 240, 0.801); /* 테두리 굵기를 8px로 대폭 강화 */
    border-radius: 20px; /* 모서리 각도 조절 (48px -> 20px) */
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-y: auto;
    padding: 40px 24px;
}

.system-header {
    margin-top: 8vh; /* 기존 유지 */
    transform: translateY(-40px); /* 타이틀만 위로 이동 */
    text-align: center;
    color: rgba(255, 255, 240, 0.95); /* 아이보리색 타이틀 */ /*(255, 255, 240, 0.801) (255, 255, 255, 0.95)*/
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 10;
}

.system-header .sub-title {
    display: block;
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.system-header .main-title {
    margin: 0;
    font-size: 2.8rem;
    font-weight: 800;
}

.login-panel {
    width: min(100%, 800px);
    margin-top: 5vh; /* 타이틀 바로 아래쪽에 배치 */
    margin-bottom: auto; /* */
    padding: 52px; /*48px*/
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 32px;
    background: rgba(255, 255, 240, 0.801); /* 로그인 카드 배경 (아이보리 화이트) */ /*(255, 255, 240, 0.801) (255, 255, 255, 0.92)*/
    box-shadow: 0 32px 80px rgba(0, 0, 0, 0.2);
    z-index: 20;
}

.panel-heading h1 {
    margin: 0;
    font-size: clamp(2rem, 3vw, 2.6rem);
    line-height: 1.05;
    color: #0f3d2e;
}

.panel-heading p {
    margin: 12px 0 0;
    color: #4a6659;
}

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

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

.field label {
    color: #0a291f;
    font-size: 0.96rem;
    font-weight: 700;
}

.text-input {
    width: 100%;
    padding: 16px 18px;
    border: 1px solid rgba(15, 61, 46, 0.2);
    border-radius: 18px;
    background: #fdfefe;
    color: #132238;
    transition: all 160ms ease;
}

.text-input:focus {
    outline: none;
    border-color: #0f3d2e;
    box-shadow: 0 0 0 4px rgba(15, 61, 46, 0.14);
    transform: translateY(-1px);
}

.input-hint {
    margin: 0;
    min-height: 24px;
    color: #5c746b;
    font-size: 0.95rem;
}

.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 56px;
    padding: 0 20px;
    border: 0;
    border-radius: 18px;
    background: linear-gradient(180deg, #185c45 0%, #0f3d2e 100%);
    color: #f8fbff;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 20px 40px rgba(15, 61, 46, 0.24);
    transition: all 160ms ease;
}

.primary-button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 24px 44px rgba(15, 61, 46, 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(15, 61, 46, 0.15);
}

.status-card {
    background: #f4f9f7;
}

.status-card strong {
    display: block;
    margin-bottom: 8px;
    color: #0f3d2e;
}

.status-card p,
.success-panel p {
    margin: 0;
    color: #5a7369;
}

.success-panel {
    background: linear-gradient(180deg, #f3f8f5 0%, #edf5ef 100%);
    border-color: rgba(15, 61, 46, 0.18);
}

.success-label {
    margin-bottom: 8px;
    color: #0f3d2e;
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

.success-panel h3 {
    margin: 0 0 8px;
    color: #0a291f;
    font-size: 1.4rem;
}

.hidden {
    display: none;
}

@media (max-width: 640px) {
    .app-shell {
        width: 98vw;
        height: 98vh;
        border-width: 4px; /* 모바일에서는 테두리 살짝 줄임 */
        border-radius: 12px;
        padding: 24px 16px;
    }

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