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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --border-color: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
}

.title-link {
    text-decoration: none;
    display: inline-block;
    transition: transform 0.3s;
}

.title-link:hover {
    transform: translateY(-2px);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 5px;
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    cursor: pointer;
}

.creator {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-top: 0;
    margin-bottom: 15px;
    font-style: italic;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* 카드 스타일 */
.input-card,
.claim-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}

.input-card:hover,
.claim-card:hover {
    transform: translateY(-2px);
}

.input-section h2,
.claim-card h2 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.input-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* 입력 그룹 */
.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.address-input {
    flex: 1;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: 'Courier New', monospace;
    transition: all 0.3s;
}

.address-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.address-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 5px;
}

/* 버튼 스타일 */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #475569;
}

.btn-large {
    width: 100%;
    padding: 16px 24px;
    font-size: 1.1rem;
    margin-top: 20px;
}

.btn-icon {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px;
    transition: transform 0.2s;
}

.btn-icon:hover {
    transform: scale(1.2);
}

/* 지갑 정보 */
.wallet-info {
    margin-bottom: 20px;
}

.address-display {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 10px 0;
    padding: 12px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.address {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--primary-color);
    word-break: break-all;
}

.network-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
}

.label {
    font-weight: 600;
    color: var(--text-secondary);
}

/* 보상 정보 */
.rewards-info {
    margin-top: 20px;
}

.info-box {
    background: rgba(34, 197, 94, 0.05);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 25px;
}

.info-box h3 {
    color: var(--success-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.reward-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    margin-bottom: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.reward-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.reward-value {
    color: var(--text-primary);
    font-weight: 500;
}

.reward-value.large {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--success-color);
}

.reward-value.small {
    font-size: 0.85rem;
    font-family: 'Courier New', monospace;
    color: var(--text-secondary);
}

/* 컨트랙트 파라미터 */
.contract-params {
    margin-top: 25px;
}

.contract-params h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.instruction {
    color: var(--text-secondary);
    margin-bottom: 20px;
    padding: 12px;
    background: rgba(99, 102, 241, 0.05);
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}

.param-box {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 15px;
}

.param-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.param-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.btn-copy {
    padding: 6px 12px;
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid var(--primary-color);
    border-radius: 6px;
    color: var(--primary-color);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-copy:hover {
    background: var(--primary-color);
    color: white;
}

.btn-copy.copied {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.param-value-box {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    max-height: 150px;
    overflow-y: auto;
}

.param-value {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: #a5f3fc;
    word-break: break-all;
    white-space: pre-wrap;
    display: block;
}

.action-buttons {
    margin-top: 25px;
}

/* 링크 */
.link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.link:hover {
    text-decoration: underline;
}

/* 메시지 박스 */
.message-box {
    padding: 15px 20px;
    border-radius: 8px;
    margin: 15px 0;
}

.message-box.success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.message-box.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error-color);
    color: var(--error-color);
}

.message-box.info {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--warning-color);
    color: var(--warning-color);
}

.tx-link {
    color: var(--success-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    margin-top: 10px;
}

.tx-link:hover {
    text-decoration: underline;
}

/* 로딩 */
.loading {
    text-align: center;
    padding: 30px;
}

.spinner {
    border: 4px solid rgba(99, 102, 241, 0.1);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 안내 섹션 */
.info-section {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
}

.info-section h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.info-section ol,
.info-section ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.info-section li {
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.example-box {
    background: rgba(245, 158, 11, 0.05);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: 8px;
    padding: 20px;
    margin-top: 20px;
}

.example-box h4 {
    color: var(--warning-color);
    margin-bottom: 10px;
}

.example-box ul {
    margin-left: 20px;
}

.example-box li {
    margin-bottom: 8px;
}

.security-notice {
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 8px;
    padding: 20px;
    margin-top: 20px;
}

.security-notice h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.security-notice ul {
    list-style: none;
    margin-left: 0;
}

.security-notice li::before {
    content: "✓ ";
    color: var(--success-color);
    font-weight: bold;
    margin-right: 8px;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 0;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

footer p {
    margin-bottom: 5px;
}

footer .small {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* 유틸리티 클래스 */
.hidden {
    display: none !important;
}

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

    .input-card,
    .claim-card,
    .info-section {
        padding: 20px;
    }

    .input-group {
        flex-direction: column;
    }

    .address-input {
        font-size: 0.85rem;
    }

    .param-label {
        font-size: 0.85rem;
    }

    .param-value {
        font-size: 0.75rem;
    }

    .reward-value.large {
        font-size: 1.4rem;
    }

    .btn {
        width: 100%;
    }
}