/* Reset and base styles */
* {
    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 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    padding: 2rem 0;
    text-align: center;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.5rem;
}

.tagline {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
    font-weight: 300;
}

/* Main content */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 1rem;
}

/* Hero section */
.hero-section {
    text-align: center;
    margin-bottom: 3rem;
    max-width: 800px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    font-weight: 300;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature h3 {
    color: white;
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.feature p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

/* Auth section */
.auth-section {
    width: 100%;
    max-width: 400px;
    margin-bottom: 3rem;
}

.auth-container {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.auth-tabs {
    display: flex;
    margin-bottom: 2rem;
    border-bottom: 2px solid #f0f0f0;
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    border: none;
    background: none;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

.tab-btn:hover {
    color: #667eea;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-form h3 {
    margin-bottom: 1.5rem;
    color: #333;
    font-weight: 600;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: #888;
    font-size: 0.85rem;
}

.btn {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

/* Footer */
.footer {
    padding: 2rem 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

/* Dashboard styles */
.dashboard {
    background: white;
    min-height: 100vh;
}

.dashboard-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.dashboard-header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dashboard-logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.username {
    font-weight: 500;
}

.logout-btn {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.dashboard-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #f0f0f0;
}

.card h3 {
    margin-bottom: 1.5rem;
    color: #333;
    font-weight: 600;
}

.address-list {
    max-height: 300px;
    overflow-y: auto;
}

.address-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.3s ease;
}

.address-item:hover {
    background: #f8f9fa;
}

.address-info h4 {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.25rem;
}

.address-info .address {
    font-family: monospace;
    font-size: 0.85rem;
    color: #333;
}

.address-balance {
    text-align: right;
}

.balance-btc {
    font-weight: 600;
    color: #333;
}

.balance-usd {
    font-size: 0.85rem;
    color: #666;
}

/* Forms */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .dashboard-header-content {
        flex-direction: column;
        gap: 1rem;
    }
}