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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --bg-color: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #475569;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding-bottom: 2rem;
}

/* Navigation */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 1rem;
}

.nav-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 1rem;
}

.nav-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
}

.nav-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

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

#usernameDisplay {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s;
    box-shadow: 0 4px 6px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-warning {
    background: var(--warning-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-warning:hover {
    background: #d97706;
}

.btn-success {
    background: var(--success-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-success:hover {
    background: #059669;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Sections */
.section {
    display: none;
    animation: fadeIn 0.3s;
}

.section.active {
    display: block;
}

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

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-header h2 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.level-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.level-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

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

.level-up-cost-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 0.5rem;
    padding-left: 1rem;
    border-left: 1px solid var(--border-color);
}

.cost-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.cost-value {
    font-size: 1rem;
    font-weight: bold;
    color: var(--success-color);
}

.level-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

.level-value {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-color);
}

.multiplier-badge {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
}

.level-up-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.level-comparison {
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.level-box {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    min-width: 150px;
}

.level-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.level-value-large {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.multiplier-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.arrow {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: bold;
}

.level-up-cost {
    text-align: center;
    font-size: 1.25rem;
    color: var(--text-primary);
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.harem-info {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
}

/* Character Grid */
.characters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.character-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.character-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

.character-photo {
    width: 100%;
    height: 300px;
    object-fit: cover;
    background: var(--bg-tertiary);
}

.character-info {
    padding: 1rem;
}

.character-name {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.character-series {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.character-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.character-actions button {
    flex: 1;
    min-width: 100px;
    font-size: 0.85rem;
    padding: 0.5rem;
}

.attack-count {
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-top: 0.5rem;
    color: var(--warning-color);
}

.reconfirm-warning {
    background: var(--warning-color);
    color: white;
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    margin-top: 0.5rem;
    text-align: center;
}

.reconfirm-info {
    background: var(--bg-tertiary);
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    margin-top: 0.5rem;
    color: var(--text-secondary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideDown 0.3s;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
    transition: color 0.3s;
}

.close:hover {
    color: var(--text-primary);
}

.modal-content form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.modal-content input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
}

.modal-content input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.modal-content input::placeholder {
    color: var(--text-secondary);
}

.error-message {
    color: var(--danger-color);
    margin-top: 1rem;
    padding: 0.5rem;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 4px;
    display: none;
}

.error-message.show {
    display: block;
}

#authSwitch {
    margin-top: 1rem;
    text-align: center;
    color: var(--text-secondary);
}

#authSwitch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

#authSwitch a:hover {
    text-decoration: underline;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* Money Display */
.money-display {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-right: 1rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.money-label {
    font-weight: 500;
    color: var(--text-secondary);
}

.money-amount {
    font-weight: bold;
    color: var(--success-color);
    font-size: 1.1rem;
}

.pending-money {
    color: var(--warning-color);
    font-size: 0.85rem;
}

.btn-small {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

/* Character Stats */
.character-stats {
    display: flex;
    gap: 0.5rem;
    margin: 0.5rem 0;
    flex-wrap: wrap;
}

.stat-item-small {
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.upgrade-level {
    background: linear-gradient(135deg, var(--warning-color), #fbbf24);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: bold;
    margin: 0.5rem 0;
    text-align: center;
}

.attack-resistance {
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-top: 0.5rem;
    color: var(--warning-color);
}

/* Money Generation Progress */
.money-generation {
    margin: 0.5rem 0;
}

.money-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
    color: var(--text-secondary);
}

.time-until {
    color: var(--warning-color);
    font-weight: 500;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success-color), #34d399);
    transition: width 1s linear;
    border-radius: 4px;
}

/* Attack Cooldown */
.attack-cooldown {
    margin-right: 1rem;
    min-width: 200px;
}

.cooldown-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.cooldown-ready {
    font-size: 0.85rem;
    color: var(--success-color);
    font-weight: 500;
}

/* Profile Cards */
.profiles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.profile-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.profile-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

.profile-header h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.profile-stats {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.profile-stats span {
    margin: 0 0.25rem;
}

/* Profile Modal */
.large-modal {
    max-width: 900px;
    width: 95%;
}

.profile-stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.stat-item {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-item strong {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.stat-item span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.profile-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
    font-size: 1rem;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.profile-tab-content {
    display: none;
    animation: fadeIn 0.3s;
}

.profile-tab-content.active {
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-links {
        width: 100%;
        flex-wrap: wrap;
    }

    .characters-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
}