/**
 * 베타 테스트 페이지 스타일 - 고급 부동산 테마
 */

/* 프리미엄 부동산 테마 색상 변수 */
:root {
    --primary-gold: #D4AF37;
    --secondary-gold: #FFD700;
    --dark-navy: #1B2951;
    --light-navy: #2C3E50;
    --premium-blue: #34495E;
    --accent-copper: #B87333;
    --text-dark: #2C3E50;
    --success-green: #27AE60;
    --warning-amber: #F39C12;
    --danger-red: #E74C3C;
    --light-gray: #F8F9FA;
    --shadow-premium: 0 15px 35px rgba(27, 41, 81, 0.1);
    --shadow-hover: 0 25px 50px rgba(27, 41, 81, 0.15);
}

/* 밝고 고급스러운 배경 그라데이션 */
.bg-gradient-primary {
    background: linear-gradient(135deg, 
        #f8f9fa 0%, 
        #e9ecef 25%,
        #ffffff 50%,
        #f1f3f4 75%,
        #e8eaf6 100%);
    min-height: 100vh;
    position: relative;
    overflow: hidden;
}

/* 밝은 배경 패턴 효과 */
.bg-gradient-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(212, 175, 55, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 215, 0, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(184, 115, 51, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* 밝은 배경용 프리미엄 카드 스타일 */
.card {
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid rgba(212, 175, 55, 0.2);
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 8px 32px rgba(212, 175, 55, 0.1);
    border-radius: 15px;
    overflow: hidden;
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-gold), var(--secondary-gold));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-hover);
    border-color: rgba(212, 175, 55, 0.3);
}

.card:hover::before {
    transform: scaleX(1);
}

/* 프리미엄 그룹 선택 카드 */
.group-card {
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.group-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.1), transparent);
    transition: left 0.5s ease;
}

.group-card:hover {
    transform: translateY(-12px) scale(1.03);
    box-shadow: 0 20px 40px rgba(27, 41, 81, 0.15);
    border-color: var(--primary-gold);
}

.group-card:hover::after {
    left: 100%;
}

.group-card.active {
    border-color: var(--primary-gold);
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.05), rgba(255, 215, 0, 0.02));
    transform: translateY(-12px) scale(1.03);
    box-shadow: 0 25px 50px rgba(212, 175, 55, 0.2);
    color: var(--text-dark);
}

.group-card.active .fas {
    color: var(--primary-gold);
    text-shadow: 0 2px 4px rgba(212, 175, 55, 0.3);
}

.group-card.active h4 {
    color: var(--primary-gold);
    font-weight: 700;
}

/* 프로그레스 바 애니메이션 */
.progress-bar {
    transition: width 1s ease-in-out;
}

/* 밝은 배경용 텍스트 스타일 */
.text-white-75 {
    color: rgba(44, 62, 80, 0.85);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
}

.display-4 {
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-gold), var(--accent-copper));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: none;
    letter-spacing: -0.02em;
}

.lead {
    font-weight: 400;
    line-height: 1.7;
    letter-spacing: 0.3px;
    color: rgba(44, 62, 80, 0.8);
}

/* 프리미엄 버튼 스타일 */
.btn {
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 25px;
    font-weight: 600;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-gold), var(--accent-copper));
    border: none;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-copper), var(--primary-gold));
    color: white;
    box-shadow: 0 15px 30px rgba(212, 175, 55, 0.3);
}

/* 프리미엄 체크박스 체크 상태 */
.form-check-input:checked {
    background: linear-gradient(135deg, var(--primary-gold), var(--accent-copper));
    border-color: var(--primary-gold);
    position: relative;
}

.form-check-input:checked::before {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-weight: bold;
    font-size: 0.8em;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* 프리미엄 로딩 스피너 */
.spinner-border {
    width: 4rem;
    height: 4rem;
    border-width: 0.4em;
    border-color: var(--primary-gold);
    border-right-color: transparent;
    filter: drop-shadow(0 4px 8px rgba(212, 175, 55, 0.3));
}

@keyframes luxurySpinner {
    0% {
        transform: rotate(0deg);
        filter: drop-shadow(0 4px 8px rgba(212, 175, 55, 0.3));
    }
    50% {
        filter: drop-shadow(0 6px 12px rgba(212, 175, 55, 0.5));
    }
    100% {
        transform: rotate(360deg);
        filter: drop-shadow(0 4px 8px rgba(212, 175, 55, 0.3));
    }
}

.spinner-border {
    animation: luxurySpinner 1s linear infinite;
}

/* 프리미엄 카드 헤더 */
.card-header {
    border-bottom: 1px solid rgba(212, 175, 55, 0.1);
    font-weight: 700;
    background: linear-gradient(135deg, 
        rgba(212, 175, 55, 0.05), 
        rgba(255, 215, 0, 0.02));
    position: relative;
    overflow: hidden;
}

.card-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-gold), var(--secondary-gold));
}

.card-header h4 {
    margin: 0;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* 프리미엄 배지 스타일 */
.badge {
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 20px;
    padding: 0.6em 1.2em;
    text-transform: uppercase;
    font-size: 0.75em;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
}

.bg-warning {
    background: linear-gradient(135deg, var(--warning-amber), #E67E22) !important;
    color: white !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.bg-success {
    background: linear-gradient(135deg, var(--success-green), #229954) !important;
    color: white !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.bg-danger {
    background: linear-gradient(135deg, var(--danger-red), #C0392B) !important;
    color: white !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* 밝은 배경용 프리미엄 폼 요소 */
.form-control, .form-select {
    border-radius: 12px;
    border: 2px solid rgba(212, 175, 55, 0.2);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
    color: var(--text-dark);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-gold);
    box-shadow: 
        0 0 0 0.2rem rgba(212, 175, 55, 0.15),
        0 5px 15px rgba(212, 175, 55, 0.1);
    background: white;
    transform: translateY(-1px);
    color: var(--text-dark);
}

.form-label {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
}

/* 프리미엄 알림 박스 */
.alert {
    border-radius: 15px;
    border: 1px solid rgba(212, 175, 55, 0.2);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-premium);
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-gold), var(--secondary-gold));
}

.alert-info {
    background: linear-gradient(135deg, 
        rgba(212, 175, 55, 0.05), 
        rgba(255, 215, 0, 0.02));
    color: var(--text-dark);
    border-color: rgba(212, 175, 55, 0.2);
}

.alert-heading {
    color: var(--primary-gold);
    font-weight: 700;
}

/* 프리미엄 반응형 디자인 */

/* 대형 태블릿 및 소형 데스크톱 (1024px - 1199px) */
@media (max-width: 1199px) {
    .row.text-center h3 {
        font-size: 2rem;
    }
    
    .card-body {
        padding: 1.8rem !important;
    }
}

/* 태블릿 (768px - 1023px) */
@media (max-width: 1023px) {
    .bg-gradient-primary::before {
        opacity: 0.5;
    }
    
    .display-4 {
        font-size: 2.8rem;
        letter-spacing: -0.01em;
    }
    
    .lead {
        font-size: 1.1rem;
        line-height: 1.6;
    }
    
    .group-card {
        margin-bottom: 1.5rem;
    }
    
    .card-body {
        padding: 1.5rem !important;
    }
    
    .btn-lg {
        padding: 1rem 2.5rem;
        font-size: 1rem;
    }
    
    .row.text-center h3 {
        font-size: 1.8rem;
    }
    
    .badge {
        padding: 0.5em 1em;
        font-size: 0.8em;
    }
}

/* 모바일 랜드스케이프 (576px - 767px) */
@media (max-width: 767px) {
    .container-fluid {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
    
    .display-4 {
        font-size: 2.2rem;
        line-height: 1.2;
    }
    
    .lead {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .group-card {
        margin-bottom: 1rem;
        padding: 0.5rem;
    }
    
    .group-card .card-body {
        padding: 1.2rem !important;
        text-align: center;
    }
    
    .group-card .fas {
        font-size: 2.5rem !important;
        margin-bottom: 1rem;
    }
    
    .group-card h4 {
        font-size: 1.2rem;
        margin-bottom: 1rem;
    }
    
    .group-card ul {
        font-size: 0.9rem;
    }
    
    .card-body {
        padding: 1.2rem !important;
    }
    
    .btn-lg {
        padding: 0.8rem 2rem;
        font-size: 0.95rem;
        border-radius: 25px;
    }
    
    .form-control, .form-select {
        padding: 0.6rem 0.8rem;
        font-size: 0.95rem;
    }
    
    .row.text-center h3 {
        font-size: 1.6rem;
    }
    
    .row.text-center small {
        font-size: 0.7rem;
    }
    
    .progress {
        height: 10px;
    }
    
    .alert {
        padding: 1rem;
        font-size: 0.9rem;
    }
}

/* 모바일 포트레이트 (최대 575px) */
@media (max-width: 575px) {
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .bg-gradient-primary {
        padding: 2rem 0;
    }
    
    .display-4 {
        font-size: 1.8rem;
        line-height: 1.3;
        margin-bottom: 1rem;
    }
    
    .display-4::after {
        display: none; /* 작은 화면에서는 이모지 숨김 */
    }
    
    .lead {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
        padding: 0 1rem;
    }
    
    .badge {
        padding: 0.4em 0.8em;
        font-size: 0.7em;
        margin: 0.5rem 0;
    }
    
    .group-card {
        margin-bottom: 0.8rem;
    }
    
    .group-card .card-body {
        padding: 1rem !important;
    }
    
    .group-card .fas {
        font-size: 2rem !important;
    }
    
    .group-card h4 {
        font-size: 1.1rem;
    }
    
    .group-card ul li {
        margin-bottom: 0.5rem;
        font-size: 0.85rem;
        line-height: 1.4;
    }
    
    .card-body {
        padding: 1rem !important;
    }
    
    .card-header {
        padding: 0.8rem 1rem;
    }
    
    .btn-lg {
        padding: 0.7rem 1.5rem;
        font-size: 0.85rem;
        width: 100%;
        margin-top: 1rem;
    }
    
    .form-control, .form-select {
        padding: 0.6rem;
        font-size: 0.9rem;
        margin-bottom: 0.8rem;
    }
    
    .form-label {
        font-size: 0.85rem;
        margin-bottom: 0.3rem;
    }
    
    .form-check {
        margin-bottom: 0.5rem;
    }
    
    .form-check-label {
        font-size: 0.85rem;
    }
    
    .row.text-center h3 {
        font-size: 1.4rem;
        margin-bottom: 0.2rem;
    }
    
    .row.text-center small {
        font-size: 0.65rem;
    }
    
    .progress {
        height: 8px;
        margin-bottom: 1rem;
    }
    
    .alert {
        padding: 0.8rem;
        font-size: 0.85rem;
        margin-bottom: 1rem;
    }
    
    .alert-heading {
        font-size: 1rem;
    }
    
    .spinner-border {
        width: 2.5rem;
        height: 2.5rem;
    }
    
    /* 폼 레이아웃 개선 */
    .row .col-md-6 {
        margin-bottom: 0.5rem;
    }
    
    .row .col-md-3 {
        margin-bottom: 0.3rem;
    }
    
    /* 카드 간격 조정 */
    .mb-5 {
        margin-bottom: 2rem !important;
    }
    
    .mb-4 {
        margin-bottom: 1.5rem !important;
    }
    
    .mb-3 {
        margin-bottom: 1rem !important;
    }
}

/* 초소형 디바이스 (320px - 479px) */
@media (max-width: 479px) {
    .container-fluid {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }
    
    .display-4 {
        font-size: 1.5rem;
        padding: 0 0.5rem;
    }
    
    .lead {
        font-size: 0.9rem;
        padding: 0 0.5rem;
    }
    
    .card {
        margin: 0.3rem 0;
        border-radius: 12px;
    }
    
    .group-card .card-body {
        padding: 0.8rem !important;
    }
    
    .group-card .fas {
        font-size: 1.8rem !important;
    }
    
    .group-card h4 {
        font-size: 1rem;
    }
    
    .btn-lg {
        padding: 0.6rem 1rem;
        font-size: 0.8rem;
    }
    
    .form-control, .form-select {
        padding: 0.5rem;
        font-size: 0.85rem;
    }
    
    .row.text-center h3 {
        font-size: 1.2rem;
    }
    
    .progress {
        height: 6px;
    }
}

/* 고해상도 디스플레이 최적화 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .card {
        box-shadow: var(--shadow-premium);
    }
    
    .btn {
        text-rendering: optimizeLegibility;
    }
    
    .display-4, .lead {
        text-rendering: optimizeLegibility;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* 터치 디바이스 최적화 */
@media (hover: none) and (pointer: coarse) {
    .group-card:hover {
        transform: none;
    }
    
    .group-card:active {
        transform: translateY(-5px) scale(0.98);
    }
    
    .btn:hover {
        transform: none;
    }
    
    .btn:active {
        transform: translateY(-1px) scale(0.98);
    }
    
    /* 터치 타겟 크기 개선 */
    .form-check-input {
        width: 1.5em;
        height: 1.5em;
    }
    
    .form-check-label {
        padding-left: 0.5rem;
        min-height: 44px;
        display: flex;
        align-items: center;
    }
}

/* 다크모드 반응형 추가 최적화 */
@media (prefers-color-scheme: dark) and (max-width: 767px) {
    .card {
        background: rgba(33, 37, 41, 0.98);
        border-color: rgba(212, 175, 55, 0.15);
        color: #ffffff;
    }
    
    .form-control, .form-select {
        background: rgba(52, 58, 64, 0.98);
        border-color: rgba(212, 175, 55, 0.2);
        color: #ffffff;
    }
    
    .form-label {
        color: rgba(255, 255, 255, 0.9) !important;
    }
    
    .form-check-label {
        color: rgba(255, 255, 255, 0.9) !important;
    }
    
    .display-4 {
        color: #ffffff !important;
        text-shadow: 0 2px 8px rgba(212, 175, 55, 0.5);
    }
    
    .lead {
        color: rgba(255, 255, 255, 0.85) !important;
    }
}

/* 접근성 향상 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .card:hover {
        transform: none;
    }
    
    .btn:hover {
        transform: none;
    }
}

/* 프리미엄 애니메이션 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.card {
    animation: fadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card:nth-child(odd) {
    animation: slideInLeft 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    animation-delay: 0.2s;
    animation-fill-mode: both;
}

.card:nth-child(even) {
    animation: slideInRight 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    animation-delay: 0.4s;
    animation-fill-mode: both;
}

/* 골드 글리터 효과 */
@keyframes goldGlitter {
    0%, 100% { opacity: 0; }
    50% { opacity: 1; }
}

.display-4::after {
    content: '✨';
    display: inline-block;
    margin-left: 10px;
    animation: goldGlitter 3s infinite;
}

/* 밝은 배경용 프리미엄 체크박스 */
.form-check-input[type="checkbox"] {
    border-radius: 6px;
    width: 1.3em;
    height: 1.3em;
    border: 2px solid rgba(212, 175, 55, 0.3);
    transition: all 0.3s ease;
    cursor: pointer;
    background: white;
}

.form-check-input[type="checkbox"]:hover {
    border-color: var(--primary-gold);
    box-shadow: 0 2px 8px rgba(212, 175, 55, 0.2);
    transform: scale(1.05);
}

.form-check-label {
    font-size: 0.95rem;
    margin-left: 0.7rem;
    font-weight: 500;
    color: var(--text-dark);
    cursor: pointer;
    transition: color 0.3s ease;
}

.form-check-label:hover {
    color: var(--primary-gold);
}

/* 프리미엄 진행률 표시 */
.progress {
    border-radius: 15px;
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.1), 
        rgba(255, 255, 255, 0.05));
    height: 12px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    position: relative;
}

.progress::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.progress-bar {
    border-radius: 15px;
    background: linear-gradient(90deg, 
        var(--primary-gold), 
        var(--secondary-gold),
        var(--primary-gold));
    box-shadow: 
        0 2px 4px rgba(212, 175, 55, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.progress-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: progressShine 2s infinite;
}

@keyframes progressShine {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* 프리미엄 상태 텍스트 */
.text-success {
    color: var(--success-green) !important;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(39, 174, 96, 0.2);
}

.text-warning {
    color: var(--warning-amber) !important;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(243, 156, 18, 0.2);
}

.text-danger {
    color: var(--danger-red) !important;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(231, 76, 60, 0.2);
}

.text-info {
    color: var(--primary-gold) !important;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(212, 175, 55, 0.2);
}

/* 프리미엄 입력 필드 효과 */
.form-control:focus,
.form-select:focus {
    transform: translateY(-2px) scale(1.01);
}

.form-control:hover,
.form-select:hover {
    border-color: rgba(212, 175, 55, 0.3);
    box-shadow: 0 2px 8px rgba(212, 175, 55, 0.1);
}

.form-check-input:checked {
    background: linear-gradient(135deg, var(--primary-gold), var(--accent-copper));
    border-color: var(--primary-gold);
    box-shadow: 0 2px 4px rgba(212, 175, 55, 0.3);
}

/* 프리미엄 제출 버튼 */
.btn-primary.btn-lg {
    background: linear-gradient(135deg, var(--primary-gold), var(--accent-copper));
    border: none;
    border-radius: 30px;
    padding: 1.2rem 3.5rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    box-shadow: 0 10px 25px rgba(212, 175, 55, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary.btn-lg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--secondary-gold), var(--primary-gold));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.btn-primary.btn-lg:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 20px 40px rgba(212, 175, 55, 0.4);
}

.btn-primary.btn-lg:hover::before {
    opacity: 1;
}

.btn-primary.btn-lg:disabled {
    background: linear-gradient(135deg, #95a5a6, #7f8c8d);
    transform: none;
    box-shadow: none;
    cursor: not-allowed;
}

/* 버튼 텍스트와 아이콘이 위에 나타나도록 z-index 설정 */
.btn-primary.btn-lg .fas,
.btn-primary.btn-lg span,
.btn-primary.btn-lg {
    position: relative;
    z-index: 2;
}

/* 버튼 내부 모든 텍스트 요소 z-index 보장 */
.btn-primary.btn-lg * {
    position: relative;
    z-index: 2;
}

/* 기본 모드에서도 버튼 텍스트 보장 */
.btn-primary.btn-lg {
    color: white !important;
}

.btn-primary.btn-lg:hover {
    color: white !important;
}

.btn-primary.btn-lg span,
.btn-primary.btn-lg .fas {
    color: white !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.btn-primary.btn-lg:hover span,
.btn-primary.btn-lg:hover .fas {
    color: white !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* 프리미엄 아이콘 스타일 */
.fas {
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.group-card:hover .fas {
    transform: scale(1.15) rotate(5deg);
    filter: drop-shadow(0 4px 8px rgba(212, 175, 55, 0.3));
}

.text-success .fas,
.text-info .fas {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* 프리미엄 통계 디스플레이 */
.row.text-center h3 {
    font-weight: 800;
    margin-bottom: 0.25rem;
    font-size: 2.2rem;
    background: linear-gradient(135deg, var(--primary-gold), var(--accent-copper));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 4px rgba(212, 175, 55, 0.2);
    position: relative;
}

.row.text-center h3::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-gold), var(--secondary-gold));
    border-radius: 1px;
}

.row.text-center small {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    color: rgba(44, 62, 80, 0.7);
}

/* 설문조사 섹션 스타일 */
.border-top {
    border-color: #dee2e6 !important;
    margin-top: 2rem;
}

/* 프리미엄 푸터 */
footer {
    margin-top: auto;
    background: linear-gradient(135deg, var(--dark-navy), var(--premium-blue));
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-gold), transparent);
}

footer p {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    letter-spacing: 0.5px;
    margin: 0;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* 로딩 상태 개선 */
.spinner-border {
    border-width: 0.3em;
}

/* 알림 메시지 개선 */
.alert-heading {
    font-weight: 600;
    font-size: 1.1rem;
}

/* 반응형 텍스트 크기 */
@media (max-width: 992px) {
    h1.display-4 {
        font-size: 2.8rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    h4 {
        font-size: 1.3rem;
    }
}

/* 프리미엄 다크 모드 */
@media (prefers-color-scheme: dark) {
    :root {
        --shadow-premium: 0 15px 35px rgba(0, 0, 0, 0.3);
        --shadow-hover: 0 25px 50px rgba(0, 0, 0, 0.4);
    }
    
    /* 다크모드에서 어두운 배경으로 변경 */
    .bg-gradient-primary {
        background: linear-gradient(135deg, 
            #0a0f1c 0%, 
            #1a1a2e 40%,
            #16213e 100%) !important;
    }
    
    .bg-gradient-primary::before {
        background-image: 
            radial-gradient(circle at 20% 50%, rgba(212, 175, 55, 0.15) 0%, transparent 50%),
            radial-gradient(circle at 80% 20%, rgba(255, 215, 0, 0.08) 0%, transparent 50%),
            radial-gradient(circle at 40% 80%, rgba(184, 115, 51, 0.12) 0%, transparent 50%) !important;
        z-index: -1;
    }
    
    /* 다크모드에서 그라데이션 텍스트 문제 해결 */
    .display-4 {
        background: none !important;
        background-clip: unset !important;
        -webkit-background-clip: unset !important;
        -webkit-text-fill-color: unset !important;
        color: #ffffff !important;
        text-shadow: 0 2px 8px rgba(212, 175, 55, 0.5);
    }
    
    .row.text-center h3 {
        background: none !important;
        background-clip: unset !important;
        -webkit-background-clip: unset !important;
        -webkit-text-fill-color: unset !important;
        color: var(--primary-gold) !important;
        text-shadow: 0 2px 4px rgba(212, 175, 55, 0.3);
    }
    
    /* 다크모드 텍스트 색상 */
    .text-white-75 {
        color: rgba(255, 255, 255, 0.9) !important;
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    }
    
    .lead {
        color: rgba(255, 255, 255, 0.85) !important;
    }
    
    .card {
        background: rgba(33, 37, 41, 0.95);
        color: #ffffff;
        border-color: rgba(212, 175, 55, 0.2);
        backdrop-filter: blur(10px);
    }
    
    .card-header {
        background: linear-gradient(135deg, 
            rgba(212, 175, 55, 0.08), 
            rgba(255, 215, 0, 0.04)) !important;
        color: #ffffff;
    }
    
    .form-control, .form-select {
        background: rgba(52, 58, 64, 0.95);
        color: #ffffff;
        border-color: rgba(212, 175, 55, 0.3);
    }
    
    .form-control:focus, .form-select:focus {
        background: rgba(52, 58, 64, 1);
        color: #ffffff;
        border-color: var(--primary-gold);
    }
    
    .form-control::placeholder {
        color: rgba(255, 255, 255, 0.6);
    }
    
    .form-label {
        color: rgba(255, 255, 255, 0.9);
    }
    
    .form-check-label {
        color: rgba(255, 255, 255, 0.9) !important;
    }
    
    .alert-info {
        background: linear-gradient(135deg, 
            rgba(212, 175, 55, 0.15), 
            rgba(255, 215, 0, 0.08)) !important;
        color: rgba(255, 255, 255, 0.95) !important;
        border-color: rgba(212, 175, 55, 0.3);
    }
    
    .alert-heading {
        color: var(--primary-gold) !important;
    }
    
    /* 텍스트 색상 보정 */
    .text-white-75 {
        color: rgba(255, 255, 255, 0.9) !important;
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    }
    
    .lead {
        color: rgba(255, 255, 255, 0.85) !important;
    }
    
    .text-muted {
        color: rgba(255, 255, 255, 0.6) !important;
    }
    
    /* 그룹 카드 다크모드 */
    .group-card.active {
        background: linear-gradient(135deg, 
            rgba(212, 175, 55, 0.1), 
            rgba(255, 215, 0, 0.05)) !important;
        color: #ffffff !important;
    }
    
    .group-card.active h4 {
        color: var(--primary-gold) !important;
    }
    
    .group-card ul li {
        color: rgba(255, 255, 255, 0.9);
    }
    
    /* 푸터 다크모드 */
    footer {
        background: linear-gradient(135deg, #0a0f1c, #1a1a2e) !important;
    }
    
    footer p {
        color: rgba(255, 255, 255, 0.8) !important;
    }
    
    /* 버튼 다크모드에서 텍스트 보정 */
    .btn-primary {
        color: #ffffff !important;
    }
    
    .btn-primary:hover {
        color: #ffffff !important;
    }
    
    .btn-primary.btn-lg {
        color: #ffffff !important;
    }
    
    .btn-primary.btn-lg:hover {
        color: #ffffff !important;
    }
    
    /* 버튼 내부 텍스트 강제 보정 */
    .btn-primary.btn-lg span,
    .btn-primary.btn-lg .fas {
        color: #ffffff !important;
        text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    }
    
    .btn-primary.btn-lg:hover span,
    .btn-primary.btn-lg:hover .fas {
        color: #ffffff !important;
        text-shadow: 0 1px 2px rgba(0, 0, 0, 0.7);
    }
    
    /* 상태 배지 텍스트 보정 */
    .badge {
        color: #ffffff !important;
    }
    
    /* 로딩 스피너 다크모드 */
    .spinner-border {
        border-color: var(--primary-gold) rgba(212, 175, 55, 0.2) rgba(212, 175, 55, 0.2) rgba(212, 175, 55, 0.2);
    }
    
    /* 추가 텍스트 요소 보정 */
    h1, h2, h3, h4, h5, h6 {
        color: rgba(255, 255, 255, 0.95) !important;
    }
    
    p {
        color: rgba(255, 255, 255, 0.85) !important;
    }
    
    .card-body p {
        color: rgba(255, 255, 255, 0.85) !important;
    }
    
    .card-body ul li {
        color: rgba(255, 255, 255, 0.85) !important;
    }
    
    /* 체크박스 텍스트 */
    .form-check-input + .form-check-label {
        color: rgba(255, 255, 255, 0.9) !important;
    }
    
    /* 선택 옵션 텍스트 */
    .form-select option {
        background-color: #343a40;
        color: #ffffff;
    }
    
    /* 텍스트 영역 플레이스홀더 */
    .form-control::placeholder,
    .form-select::placeholder {
        color: rgba(255, 255, 255, 0.6) !important;
    }
    
    /* 테이블 형태 통계 텍스트 */
    .row.text-center small {
        color: rgba(255, 255, 255, 0.7) !important;
    }
    
    /* 상태 텍스트 다크모드 강화 */
    .text-success {
        color: #4ade80 !important;
        text-shadow: 0 1px 2px rgba(74, 222, 128, 0.3);
    }
    
    .text-warning {
        color: #fbbf24 !important;
        text-shadow: 0 1px 2px rgba(251, 191, 36, 0.3);
    }
    
    .text-danger {
        color: #f87171 !important;
        text-shadow: 0 1px 2px rgba(248, 113, 113, 0.3);
    }
    
    .text-info {
        color: var(--primary-gold) !important;
        text-shadow: 0 1px 2px rgba(212, 175, 55, 0.3);
    }
    
    /* 링크 텍스트 */
    a {
        color: var(--primary-gold) !important;
    }
    
    a:hover {
        color: var(--secondary-gold) !important;
    }
    
    /* 테이블 셀 텍스트 (혹시 있을 경우) */
    td, th {
        color: rgba(255, 255, 255, 0.9) !important;
    }
    
    /* 로그인 안내 텍스트 */
    .card-body i + h4,
    .card-body h4 + p {
        color: rgba(255, 255, 255, 0.9) !important;
    }
    
    /* 설문조사 섹션 제목 */
    .border-top h5 {
        color: rgba(255, 255, 255, 0.95) !important;
    }
    
    /* 모든 강조 텍스트 */
    strong, b {
        color: rgba(255, 255, 255, 0.95) !important;
    }
    
    /* 작은 텍스트 요소 */
    small {
        color: rgba(255, 255, 255, 0.7) !important;
    }
    
    /* 아이콘 다음 텍스트 */
    .fas + span,
    .far + span,
    .fab + span {
        color: rgba(255, 255, 255, 0.9) !important;
    }
    
    /* 추가 텍스트 요소 다크모드 보정 */
    .card-body li {
        color: rgba(255, 255, 255, 0.85) !important;
    }
    
    .group-card ul li {
        color: rgba(255, 255, 255, 0.85) !important;
    }
    
    .group-card .fas {
        color: var(--primary-gold) !important;
    }
    
    /* 모든 텍스트 요소 강제 보정 */
    .card p,
    .card li,
    .card span:not(.badge) {
        color: rgba(255, 255, 255, 0.85) !important;
    }
    
    .card .fas,
    .card .far,
    .card .fab {
        color: var(--primary-gold) !important;
    }
}

/* 스크롤바 커스터마이징 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-gold), var(--accent-copper));
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--accent-copper), var(--primary-gold));
}

/* 선택 텍스트 스타일링 */
::selection {
    background: rgba(212, 175, 55, 0.3);
    color: var(--text-dark);
}

::-moz-selection {
    background: rgba(212, 175, 55, 0.3);
    color: var(--text-dark);
}