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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    color: #fff;
}

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

header {
    text-align: center;
    padding: 30px 0;
}

header h1 {
    font-size: 3rem;
    background: linear-gradient(45deg, #f39c12, #e74c3c, #9b59b6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(243, 156, 18, 0.3);
}

.subtitle {
    color: #888;
    margin-top: 10px;
}

.games-link {
    display: inline-block;
    margin-top: 15px;
    padding: 12px 30px;
    background: linear-gradient(45deg, #9b59b6, #8e44ad);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-size: 1rem;
    transition: all 0.3s;
    box-shadow: 0 5px 15px rgba(155, 89, 182, 0.4);
}

.games-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(155, 89, 182, 0.6);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.stat-icon {
    font-size: 2.5rem;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    color: #888;
    font-size: 0.9rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #f39c12;
}

.mining-section {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
}

.mining-control {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    margin-bottom: 30px;
}

.mine-btn {
    background: linear-gradient(45deg, #f39c12, #e74c3c);
    border: none;
    border-radius: 50px;
    padding: 20px 50px;
    font-size: 1.3rem;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 5px 20px rgba(243, 156, 18, 0.4);
}

.mine-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(243, 156, 18, 0.6);
}

.mine-btn.mining {
    background: linear-gradient(45deg, #e74c3c, #c0392b);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 5px 20px rgba(231, 76, 60, 0.4); }
    50% { box-shadow: 0 5px 30px rgba(231, 76, 60, 0.8); }
}

.btn-icon {
    font-size: 1.5rem;
}

.difficulty-display {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px 25px;
    border-radius: 10px;
    font-size: 1.1rem;
}

.difficulty-display span {
    color: #f39c12;
    font-weight: bold;
}

.progress-section {
    margin-bottom: 20px;
}

.progress-bar {
    height: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #f39c12, #e74c3c);
    width: 0%;
    transition: width 0.1s;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    color: #888;
    font-size: 0.9rem;
}

.hash-display {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px;
    border-radius: 10px;
}

.hash-display label {
    color: #888;
    display: block;
    margin-bottom: 5px;
}

.hash-display code {
    font-family: 'Consolas', monospace;
    color: #2ecc71;
    word-break: break-all;
    font-size: 0.9rem;
}

.network-section, .blocks-section, .log-section {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 25px;
    margin-bottom: 20px;
}

.network-section h2, .blocks-section h2, .log-section h2 {
    margin-bottom: 20px;
    color: #f39c12;
}

.network-stats {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

.network-stat {
    display: flex;
    gap: 10px;
}

.network-stat .label {
    color: #888;
}

.network-stat .value {
    color: #2ecc71;
    font-weight: bold;
}

.blocks-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 300px;
    overflow-y: auto;
}

.block-item {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 15px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 15px;
    align-items: center;
    border-left: 4px solid #f39c12;
}

.block-item.mine {
    border-left-color: #2ecc71;
    background: rgba(46, 204, 113, 0.1);
}

.block-number {
    font-size: 1.2rem;
    font-weight: bold;
    color: #f39c12;
}

.block-hash {
    font-family: 'Consolas', monospace;
    font-size: 0.8rem;
    color: #888;
    word-break: break-all;
}

.block-info {
    text-align: right;
    font-size: 0.9rem;
    color: #888;
}

.log-container {
    background: rgba(0, 0, 0, 0.4);
    border-radius: 10px;
    padding: 15px;
    max-height: 200px;
    overflow-y: auto;
    font-family: 'Consolas', monospace;
    font-size: 0.85rem;
}

.log-entry {
    padding: 5px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.log-entry:last-child {
    border-bottom: none;
}

.log-entry.success {
    color: #2ecc71;
}

.log-entry.info {
    color: #3498db;
}

.log-entry.warning {
    color: #f39c12;
}

.log-time {
    color: #666;
    margin-right: 10px;
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(243, 156, 18, 0.5);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(243, 156, 18, 0.8);
}

/* 리더보드 */
.leaderboard {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 25px;
    margin-top: 20px;
}

.leaderboard h2 {
    color: #f39c12;
    margin-bottom: 20px;
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 15px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
}

.leaderboard-rank {
    font-size: 1.3rem;
    font-weight: bold;
    width: 40px;
    text-align: center;
}

.leaderboard-rank.gold { color: #ffd700; }
.leaderboard-rank.silver { color: #c0c0c0; }
.leaderboard-rank.bronze { color: #cd7f32; }

.leaderboard-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid #f39c12;
}

.leaderboard-name {
    flex: 1;
    color: #fff;
    font-weight: 500;
}

.leaderboard-coins {
    color: #2ecc71;
    font-weight: bold;
}

.no-data {
    color: #666;
    text-align: center;
    padding: 20px;
}

/* 친구 초대 */
.referral-section {
    margin-top: 20px;
    text-align: center;
}

.referral-btn {
    padding: 15px 40px;
    font-size: 1.1rem;
    border: none;
    border-radius: 30px;
    background: linear-gradient(45deg, #9b59b6, #8e44ad);
    color: white;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 5px 15px rgba(155, 89, 182, 0.4);
}

.referral-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(155, 89, 182, 0.6);
}

/* 친구 초대 모달 */
.referral-content {
    max-width: 450px;
}

.referral-code-box {
    background: rgba(0, 0, 0, 0.4);
    padding: 20px;
    border-radius: 15px;
    margin: 20px 0;
    text-align: center;
}

.referral-code-box .label {
    display: block;
    color: #888;
    margin-bottom: 10px;
}

.referral-code-box .code {
    font-size: 2rem;
    font-weight: bold;
    color: #f39c12;
    letter-spacing: 5px;
}

.referral-link-box input {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.4);
    color: #fff;
    font-size: 0.9rem;
    text-align: center;
}

.referral-buttons {
    display: flex;
    gap: 15px;
    margin: 20px 0;
}

.btn-copy, .btn-share {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-copy {
    background: #3498db;
    color: white;
}

.btn-share {
    background: #2ecc71;
    color: white;
}

.btn-close {
    padding: 10px 30px;
    border: 1px solid #555;
    border-radius: 20px;
    background: transparent;
    color: #888;
    cursor: pointer;
}

/* 출석 체크 모달 */
.daily-reward {
    max-width: 500px;
}

.streak-display {
    text-align: center;
    margin: 20px 0;
}

.streak-number {
    font-size: 4rem;
    font-weight: bold;
    color: #f39c12;
}

.streak-label {
    display: block;
    color: #888;
}

.daily-calendar {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    margin: 20px 0;
}

.day-box {
    width: 60px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 10px;
    text-align: center;
    border: 2px solid transparent;
}

.day-box.checked {
    background: rgba(46, 204, 113, 0.2);
    border-color: #2ecc71;
}

.day-box.today {
    border-color: #f39c12;
    box-shadow: 0 0 15px rgba(243, 156, 18, 0.5);
}

.day-num {
    display: block;
    font-size: 0.75rem;
    color: #888;
}

.day-reward {
    display: block;
    font-size: 0.9rem;
    color: #2ecc71;
    font-weight: bold;
}

.reward-display {
    font-size: 2rem;
    color: #2ecc71;
    text-align: center;
    margin: 20px 0;
}

.reward-display span {
    color: #f39c12;
}

/* 반응형 */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .mining-control {
        flex-direction: column;
        gap: 15px;
    }

    .network-stats {
        flex-direction: column;
        gap: 15px;
    }

    .block-item {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .daily-calendar {
        gap: 5px;
    }

    .day-box {
        width: 45px;
        padding: 8px 5px;
    }
}

/* 언어 선택기 */
.language-selector {
    position: absolute;
    top: 20px;
    right: 20px;
}

.language-selector select {
    padding: 8px 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
}

.language-selector select:hover {
    border-color: #f39c12;
}

.language-selector select option {
    background: #1a1a2e;
    color: #fff;
}

header {
    position: relative;
}

/* 면책 조항 */
.disclaimer {
    margin-top: 40px;
    padding: 20px;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #666;
    font-size: 0.85rem;
}

.disclaimer p {
    margin: 5px 0;
}