/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-yellow: #FFD700;
    --primary-yellow-hover: #FFC700;
    --text-white: #FFFFFF;
    --text-yellow: #FFD700;
    --bg-black: #000000;
    --bg-dark: #0a0a0a;
    --bg-gray: #1a1a1a;
    --border-gray: #333333;
    --success-green: #00ff88;
    --error-red: #ff4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #000000 100%);
    color: var(--text-white);
    min-height: 100vh;
    line-height: 1.6;
}

body.letter-open {
    overflow: hidden;
}

/* Letter Modal */
.letter-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    z-index: 10000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    overflow-y: auto;
}

.letter-container {
    background: rgba(26, 26, 26, 0.95);
    border: 2px solid var(--primary-yellow);
    border-radius: 16px;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 40px;
    box-shadow: 0 8px 32px rgba(255, 215, 0, 0.3);
    position: relative;
}

.letter-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-gray);
}

.letter-title {
    color: var(--text-yellow);
    font-size: 32px;
    font-weight: 700;
    margin: 0;
}

.letter-preview {
    text-align: center;
    padding: 20px 0;
}

.letter-preview-text {
    color: var(--text-white);
    font-size: 16px;
    margin-bottom: 20px;
}

.letter-content {
    display: none;
}

.letter-body {
    color: var(--text-white);
    font-size: 16px;
    line-height: 1.8;
    text-align: left;
}

.letter-body p {
    margin-bottom: 15px;
    color: var(--text-white);
}

.letter-body strong {
    color: var(--text-yellow);
    font-size: 18px;
}

.letter-divider {
    border: none;
    border-top: 1px solid var(--border-gray);
    margin: 30px 0;
}

.letter-list {
    margin: 15px 0;
    padding-left: 30px;
}

.letter-list li {
    margin-bottom: 10px;
    color: var(--text-white);
}

.letter-signature {
    text-align: right;
    font-style: italic;
    margin-top: 30px;
    color: var(--text-yellow);
}

.read-btn,
.enter-presale-btn {
    background: var(--primary-yellow);
    color: var(--bg-black);
    border: none;
    padding: 15px 40px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 20px auto;
    display: block;
}

.read-btn:hover,
.enter-presale-btn:hover {
    background: var(--primary-yellow-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.4);
}

/* Responsive for letter modal */
@media (max-width: 768px) {
    .letter-container {
        padding: 25px;
        max-height: 95vh;
    }

    .letter-title {
        font-size: 24px;
    }

    .letter-body {
        font-size: 14px;
    }

    .letter-preview-text {
        font-size: 14px;
    }

    .read-btn,
    .enter-presale-btn {
        padding: 12px 30px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .letter-container {
        padding: 20px;
    }

    .letter-title {
        font-size: 20px;
    }

    .letter-body {
        font-size: 13px;
    }
}

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

/* Header */
.header {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-gray);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo-text {
    color: var(--text-yellow);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 2px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.lang-btn {
    background: transparent;
    border: 1px solid var(--border-gray);
    color: var(--text-white);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    border-color: var(--text-yellow);
    color: var(--text-yellow);
}

.connect-wallet-btn {
    background: var(--primary-yellow);
    color: var(--bg-black);
    border: none;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.connect-wallet-btn:hover {
    background: var(--primary-yellow-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.wallet-info {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid var(--border-gray);
}

.wallet-address {
    color: var(--text-yellow);
    font-size: 14px;
    font-family: 'Courier New', monospace;
}

.wallet-balance,
.wallet-chain {
    color: var(--text-white);
    font-size: 14px;
}

.disconnect-btn {
    background: transparent;
    border: 1px solid var(--border-gray);
    color: var(--text-white);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s ease;
}

.disconnect-btn:hover {
    border-color: var(--error-red);
    color: var(--error-red);
}

/* Main Content */
.main-content {
    padding: 60px 0;
}

/* Hero Section */
.hero-section {
    text-align: center;
    margin-bottom: 60px;
}

.hero-title {
    color: var(--text-yellow);
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.hero-subtitle {
    color: var(--text-white);
    font-size: 20px;
    opacity: 0.9;
}

/* Presale Card */
.presale-card {
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid var(--border-gray);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.presale-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.presale-title {
    color: var(--text-yellow);
    font-size: 32px;
    font-weight: 700;
}

.presale-deadline {
    color: var(--text-white);
    font-size: 16px;
}

.presale-deadline span {
    color: var(--text-yellow);
    font-weight: 600;
}

/* Progress Section */
.progress-section {
    margin-bottom: 30px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.progress-label {
    color: var(--text-white);
    font-size: 18px;
}

.progress-percentage {
    color: var(--text-yellow);
    font-size: 32px;
    font-weight: 700;
}

.progress-bar-container {
    width: 100%;
    height: 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-yellow) 0%, var(--primary-yellow-hover) 100%);
    border-radius: 6px;
    transition: width 0.5s ease;
    width: 43.5%;
}

/* Presale Stats */
.presale-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
    padding: 30px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
}

.stat-item {
    text-align: center;
}

.stat-label {
    color: var(--text-white);
    font-size: 14px;
    opacity: 0.7;
    margin-bottom: 8px;
}

.stat-value {
    color: var(--text-yellow);
    font-size: 20px;
    font-weight: 600;
}

/* User Participation */
.user-participation {
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid var(--primary-yellow);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
}

.participation-header h4 {
    color: var(--text-yellow);
    font-size: 18px;
    margin-bottom: 10px;
}

.participation-amount {
    color: var(--text-white);
    font-size: 16px;
}

.amount-value {
    color: var(--text-yellow);
    font-weight: 700;
    font-size: 20px;
    margin-left: 10px;
}

/* Purchase Form */
.purchase-form {
    margin-top: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: var(--text-white);
    font-size: 16px;
    margin-bottom: 10px;
}

.input-group {
    display: flex;
    gap: 10px;
}

.amount-input {
    flex: 1;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-gray);
    border-radius: 8px;
    padding: 15px;
    color: var(--text-white);
    font-size: 18px;
    transition: all 0.3s ease;
}

.amount-input:focus {
    outline: none;
    border-color: var(--primary-yellow);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.max-btn {
    background: transparent;
    border: 1px solid var(--border-gray);
    color: var(--text-white);
    padding: 15px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.max-btn:hover {
    border-color: var(--primary-yellow);
    color: var(--text-yellow);
}

.input-hint {
    color: var(--text-white);
    font-size: 12px;
    opacity: 0.6;
    margin-top: 5px;
}

.estimated-receive {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: rgba(255, 215, 0, 0.1);
    border-radius: 8px;
    color: var(--text-white);
    font-size: 16px;
}

.estimated-value {
    color: var(--text-yellow);
    font-weight: 700;
    font-size: 20px;
}

.participate-btn,
.participate-again-btn {
    width: 100%;
    background: var(--primary-yellow);
    color: var(--bg-black);
    border: none;
    padding: 18px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.participate-btn:hover:not(:disabled),
.participate-again-btn:hover {
    background: var(--primary-yellow-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.4);
}

.participate-btn:disabled,
.participate-again-btn:disabled {
    background: rgba(255, 215, 0, 0.3);
    color: rgba(0, 0, 0, 0.5);
    cursor: not-allowed;
}

/* Transaction Status */
.transaction-status {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--success-green);
}

.status-message {
    color: var(--success-green);
    font-size: 14px;
    margin-bottom: 10px;
}

.tx-hash {
    color: var(--text-white);
    font-size: 12px;
    font-family: 'Courier New', monospace;
    word-break: break-all;
}

.tx-hash a {
    color: var(--text-yellow);
    text-decoration: none;
}

.tx-hash a:hover {
    text-decoration: underline;
}

/* Tokenomics Section */
.tokenomics-section,
.utility-section {
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid var(--border-gray);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 40px;
}

.section-title {
    color: var(--text-yellow);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 30px;
    text-align: center;
}

.tokenomics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.tokenomics-item {
    background: rgba(0, 0, 0, 0.3);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-gray);
    text-align: center;
}

.tokenomics-label {
    color: var(--text-white);
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 10px;
}

.tokenomics-value {
    color: var(--text-yellow);
    font-size: 20px;
    font-weight: 600;
}

/* Utility Section */
.utility-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.utility-item {
    background: rgba(0, 0, 0, 0.3);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-gray);
    color: var(--text-white);
    font-size: 16px;
    transition: all 0.3s ease;
}

.utility-item:hover {
    border-color: var(--primary-yellow);
    transform: translateX(5px);
}

/* Footer */
.footer {
    background: rgba(0, 0, 0, 0.8);
    border-top: 1px solid var(--border-gray);
    padding: 40px 0;
    margin-top: 60px;
}

.footer-content {
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
}

.footer-link {
    color: var(--text-white);
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s ease;
}

.footer-link:hover {
    color: var(--text-yellow);
}

.footer-text {
    color: var(--text-white);
    font-size: 14px;
    opacity: 0.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .presale-card {
        padding: 25px;
    }

    .presale-title {
        font-size: 24px;
    }

    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    .header-actions {
        width: 100%;
        justify-content: center;
    }

    .wallet-info {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
    }

    .presale-stats {
        grid-template-columns: 1fr;
    }

    .tokenomics-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .presale-card {
        padding: 20px;
    }

    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s ease-in-out infinite;
}