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

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700&display=swap');

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f8f9fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 메인 컨텐츠 */
.main-content {
    margin-top: 70px;
}

/* 히어로 섹션 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero h1 i {
    color: #ffd700;
    margin-right: 15px;
    animation: pulse 2s infinite;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 15px;
    opacity: 0.9;
}

.hero-subtitle {
    font-size: 1.1rem;
    opacity: 0.8;
    max-width: 600px;
    margin: 0 auto;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* 도구 섹션 */
.tools-section {
    padding: 80px 0;
    background: white;
}

.tools-section h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 50px;
    color: #2c3e50;
}

.tools-section h2 i {
    color: #3498db;
    margin-right: 15px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 350px));
    gap: 30px;
    margin-top: 40px;
    justify-content: center;
}

.tool-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3498db, #2980b9);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.tool-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.tool-icon i {
    font-size: 2rem;
    color: white;
}

.tool-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2c3e50;
}

.tool-content p {
    color: #7f8c8d;
    margin-bottom: 20px;
    line-height: 1.6;
}

.tool-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 25px;
}

.feature-tag {
    background: rgba(52, 152, 219, 0.1);
    color: #3498db;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.tool-actions {
    margin-top: auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.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;
}

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

/* 특징 섹션 */
.features-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.features-section h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 50px;
    color: #2c3e50;
}

.features-section h2 i {
    color: #f39c12;
    margin-right: 15px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 30px 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.feature-icon i {
    font-size: 1.8rem;
    color: white;
}

.feature-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2c3e50;
}

.feature-item p {
    color: #7f8c8d;
    line-height: 1.6;
}

/* 푸터 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-section h4 i {
    color: #3498db;
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #3498db;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 20px;
    text-align: center;
    color: #bdc3c7;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .tools-section h2,
    .features-section h2 {
        font-size: 2rem;
    }

    .tools-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 320px));
        gap: 20px;
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 60px 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .tools-section,
    .features-section {
        padding: 60px 0;
    }

    .tool-card,
    .feature-item {
        padding: 20px;
    }

    .tools-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}

/* 애니메이션 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tool-card,
.feature-item {
    animation: fadeInUp 0.6s ease forwards;
}

.tool-card:nth-child(1) { animation-delay: 0.1s; }
.tool-card:nth-child(2) { animation-delay: 0.2s; }
.tool-card:nth-child(3) { animation-delay: 0.3s; }

.feature-item:nth-child(1) { animation-delay: 0.1s; }
.feature-item:nth-child(2) { animation-delay: 0.2s; }
.feature-item:nth-child(3) { animation-delay: 0.3s; }
.feature-item:nth-child(4) { animation-delay: 0.4s; }

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #3498db;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2980b9;
}

/* 실시간 채팅 */
.chat-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* 채팅 토글 버튼 */
.chat-toggle {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(52, 152, 219, 0.4);
    transition: all 0.3s ease;
    position: relative;
    animation: pulse-chat 2s infinite;
}

.chat-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(52, 152, 219, 0.6);
}

.chat-toggle i {
    color: white;
    font-size: 24px;
}

.chat-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #e74c3c;
    color: white;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    animation: bounce 0.5s ease;
}

@keyframes pulse-chat {
    0%, 100% { box-shadow: 0 4px 20px rgba(52, 152, 219, 0.4); }
    50% { box-shadow: 0 4px 20px rgba(52, 152, 219, 0.8); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* 채팅창 */
.chat-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 350px;
    height: 500px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    display: none;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid #e1e8ed;
    animation: slideUp 0.3s ease;
}

.chat-window.show {
    display: flex;
}

.chat-window.minimized {
    height: 50px;
}

.chat-window.minimized .chat-messages,
.chat-window.minimized .chat-input-container {
    display: none;
}

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

/* 채팅 헤더 */
.chat-header {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 15px 15px 0 0;
}

.chat-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.online-count {
    font-size: 12px;
    opacity: 0.8;
    margin-left: 5px;
}

.chat-controls {
    display: flex;
    gap: 5px;
}

.chat-minimize,
.chat-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.chat-minimize:hover,
.chat-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* 채팅 메시지 영역 */
.chat-messages {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    background: #f8f9fa;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

/* 메시지 스타일 */
.message {
    max-width: 80%;
    padding: 10px 12px;
    border-radius: 18px;
    font-size: 14px;
    line-height: 1.4;
    position: relative;
    animation: fadeInMessage 0.3s ease;
}

.message.own {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 5px;
}

.message.other {
    background: white;
    color: #333;
    align-self: flex-start;
    border: 1px solid #e1e8ed;
    border-bottom-left-radius: 5px;
}

.message-info {
    font-size: 11px;
    opacity: 0.7;
    margin-top: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.message.own .message-info {
    color: rgba(255, 255, 255, 0.8);
}

.system-message {
    background: #e8f4fd;
    color: #1976d2;
    padding: 8px 12px;
    border-radius: 10px;
    font-size: 13px;
    text-align: center;
    align-self: center;
    border: 1px solid #bbdefb;
    max-width: 90%;
}

.system-message i {
    margin-right: 5px;
}

@keyframes fadeInMessage {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 채팅 입력 영역 */
.chat-input-container {
    padding: 15px;
    background: white;
    border-top: 1px solid #e1e8ed;
}

.chat-input-wrapper {
    display: flex;
    gap: 10px;
    margin-bottom: 8px;
}

.chat-input-wrapper input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid #e1e8ed;
    border-radius: 25px;
    font-size: 14px;
    outline: none;
    transition: all 0.2s ease;
}

.chat-input-wrapper input:focus {
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.chat-send {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.chat-send:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.4);
}

.chat-send:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.chat-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.emoji-btn {
    background: none;
    border: none;
    color: #7f8c8d;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.emoji-btn:hover {
    background: #f8f9fa;
    color: #3498db;
}

.char-count {
    font-size: 12px;
    color: #7f8c8d;
}

.char-count.warning {
    color: #f39c12;
}

.char-count.danger {
    color: #e74c3c;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .chat-window {
        width: 300px;
        height: 450px;
    }
    
    .chat-container {
        bottom: 15px;
        right: 15px;
    }
}

@media (max-width: 480px) {
    .chat-window {
        width: calc(100vw - 30px);
        height: 400px;
        right: -15px;
    }
    
    .chat-toggle {
        width: 55px;
        height: 55px;
    }
    
    .chat-toggle i {
        font-size: 22px;
    }
}