/* 모던 글래스모피즘 스타일 */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-attachment: fixed;
    min-height: 100vh;
    position: relative;
}

/* 배경 애니메이션 효과 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 105, 180, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(138, 201, 255, 0.3) 0%, transparent 50%);
    animation: backgroundAnimation 15s ease infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes backgroundAnimation {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* 글래스 카드 기본 스타일 */
.glass-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 
        0 8px 32px 0 rgba(31, 38, 135, 0.15),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 12px 40px 0 rgba(31, 38, 135, 0.2),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.6);
}

/* 글래스 카드 - 더 투명한 버전 */
.glass-card-light {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 
        0 4px 24px 0 rgba(31, 38, 135, 0.1),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.6);
}

/* 입력 필드 글래스 스타일 */
.glass-input {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    transition: all 0.3s ease;
    color: #1a202c;
}

.glass-input:focus {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(102, 126, 234, 0.6);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    outline: none;
}

.glass-input::placeholder {
    color: rgba(0, 0, 0, 0.4);
}

/* 버튼 글래스 스타일 */
.glass-button {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    color: white;
    font-weight: 600;
    padding: 14px 28px;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(31, 38, 135, 0.15);
}

.glass-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(31, 38, 135, 0.25);
}

.glass-button:active {
    transform: translateY(0);
}

/* 프라이머리 버튼 */
.glass-button-primary {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.3);
}

.glass-button-primary:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 1) 0%, rgba(118, 75, 162, 1) 100%);
    box-shadow: 0 12px 32px rgba(102, 126, 234, 0.4);
}

/* 세컨더리 버튼 */
.glass-button-secondary {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.8) 0%, rgba(147, 51, 234, 0.8) 100%);
}

.glass-button-secondary:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.9) 0%, rgba(147, 51, 234, 0.9) 100%);
}

/* 성공 버튼 */
.glass-button-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.8) 0%, rgba(5, 150, 105, 0.8) 100%);
}

.glass-button-success:hover {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.9) 0%, rgba(5, 150, 105, 0.9) 100%);
}

/* 헤더 스타일 */
header h1 {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, rgba(255, 255, 255, 0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    animation: fadeInDown 0.8s ease;
}

header p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 0.8s ease;
}

/* 아이콘 스타일 */
.icon-glow {
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.5));
}

/* 배지 스타일 */
.glass-badge {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* 알림 스타일 */
.glass-notification {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.2);
    color: #1a202c;
}

/* QR 미리보기 컨테이너 */
.qr-preview-glass {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 
        0 8px 32px rgba(31, 38, 135, 0.15),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.5);
}

/* 토글 섹션 */
.glass-section {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 20px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

.glass-section:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.35);
}

/* 푸터 */
footer {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 애니메이션 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 스크롤바 스타일링 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* 반응형 */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.25rem;
    }
    
    .glass-card {
        border-radius: 20px;
        padding: 1.5rem;
    }
    
    .glass-button {
        padding: 12px 24px;
    }
}

/* 로딩 스피너 글래스 스타일 */
.glass-spinner {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.25);
}

/* 호버 효과 개선 */
.hover-lift {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(31, 38, 135, 0.25);
}

/* 텍스트 그라디언트 */
.text-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-white {
    background: linear-gradient(135deg, #ffffff 0%, rgba(255, 255, 255, 0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}