/* Global Styles */
:root {
    --primary-color: #4a6fdc;
    --primary-light: #eef2ff;
    --secondary-color: #f9a826;
    --text-color: #333;
    --text-light: #777;
    --border-color: #e0e0e0;
    --success-color: #4caf50;
    --danger-color: #f44336;
    --bg-color: #f7f9fc;
    --card-bg: #ffffff;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --border-radius: 10px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Nunito', sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

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

button {
    cursor: pointer;
    border: none;
    font-family: inherit;
    transition: var(--transition);
}

a {
    text-decoration: none;
    color: inherit;
}

/* Navigation */
.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--card-bg);
    box-shadow: var(--shadow);
    position: relative;
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.5rem;
}

.logo h1 {
    font-size: 1.5rem;
}

.nav-buttons {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.upgrade-btn {
    background-color: var(--secondary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.upgrade-btn:hover {
    background-color: #e0971c;
    transform: translateY(-2px);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.3rem 0.7rem;
    border-radius: 20px;
    transition: var(--transition);
}

.user-menu:hover {
    background-color: var(--primary-light);
}

.profile-pic {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.username {
    font-weight: 600;
}

/* Main Content Area */
.content-area {
    display: flex;
    flex: 1;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--card-bg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    border-right: 1px solid var(--border-color);
}

.profile-selector h3 {
    margin-bottom: 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.profile-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.profile-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.7rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.profile-item:hover, .profile-item.active {
    background-color: var(--primary-light);
}

.profile-item.active {
    color: var(--primary-color);
    font-weight: 600;
}

.profile-item img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.add-profile {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.7rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
}

.add-profile:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.add-profile i {
    font-size: 1.2rem;
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.menu-item:hover, .menu-item.active {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.menu-item.active {
    font-weight: 600;
}

.menu-item i {
    width: 20px;
    text-align: center;
}

.storage-info {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.storage-info h4 {
    margin-bottom: 0.5rem;
}

.storage-bar {
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.storage-used {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 4px;
}

.storage-info p {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 0.8rem;
}

.storage-upgrade-btn {
    width: 100%;
    padding: 0.5rem;
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
}

.storage-upgrade-btn:hover {
    background-color: var(--primary-light);
}

/* Dashboard */
.dashboard {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

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

.dashboard-header h2 {
    font-weight: 700;
    font-size: 1.8rem;
}

.action-buttons {
    display: flex;
    gap: 1rem;
}

.action-btn {
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    transition: var(--transition);
    background-color: white;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.action-btn:hover {
    transform: translateY(-2px);
}

.action-btn.main-action {
    background-color: var(--primary-color);
    color: white;
}

.action-btn.main-action:hover {
    background-color: #3a5ecc;
}

/* Timeline */
.milestone-timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline-line {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background-color: var(--border-color);
    border-radius: 3px;
}

.milestone {
    position: relative;
    margin-bottom: 2.5rem;
}

.milestone-dot {
    position: absolute;
    left: -2rem;
    top: 1.5rem;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--primary-light);
    border: 3px solid var(--primary-color);
    z-index: 2;
}

.milestone.completed .milestone-dot {
    background-color: var(--primary-color);
}

.milestone.current .milestone-dot {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 4px rgba(249, 168, 38, 0.2);
}

.milestone-content {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

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

.milestone-header h3 {
    font-weight: 700;
    font-size: 1.2rem;
}

.milestone-date {
    font-size: 0.85rem;
    color: var(--text-light);
}

.milestone-media {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 1rem;
}

.milestone-media img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background-color: rgba(0, 0, 0, 0.6);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.play-button:hover {
    background-color: var(--primary-color);
}

.play-button i {
    font-size: 1.5rem;
}

.milestone-description {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.milestone-actions {
    display: flex;
    gap: 0.8rem;
}

.milestone-btn {
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--primary-light);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

.milestone-btn:hover {
    background-color: #dce4ff;
}

.milestone-add {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background-color: var(--primary-light);
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: 1rem;
}

.milestone-add i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.add-content-btn {
    padding: 0.6rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 25px;
    font-weight: 600;
}

.add-content-btn:hover {
    background-color: #3a5ecc;
    transform: translateY(-2px);
}

.ai-suggestions {
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    padding: 1rem;
}

.ai-suggestions h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
}

.ai-suggestions h4 i {
    color: var(--secondary-color);
}

.ai-suggestions ul {
    list-style-position: inside;
    padding-left: 0.5rem;
}

.ai-suggestions li {
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
}

.milestone-hint {
    color: var(--text-light);
    font-style: italic;
    font-size: 0.9rem;
}

.milestone.upcoming .milestone-content {
    opacity: 0.7;
}

/* E-Book Preview Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 100;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-close {
    background: none;
    font-size: 1.2rem;
    color: var(--text-light);
}

.modal-close:hover {
    color: var(--danger-color);
}

.ebook-preview {
    padding: 2rem;
}

.ebook-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.ebook-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-light);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.ebook-page {
    background-color: white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    aspect-ratio: 3/4;
    max-height: 500px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    overflow: hidden;
    background-image: url('https://www.transparenttextures.com/patterns/handmade-paper.png');
}

.ebook-page-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
}

.ebook-page-content h1 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.subtitle {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-style: italic;
}

.cover-image {
    max-width: 80%;
    max-height: 60%;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.ebook-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.ebook-action-btn {
    padding: 0.7rem 1.5rem;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.ebook-action-btn:hover {
    background-color: #dce4ff;
}

.ebook-action-btn.primary {
    background-color: var(--primary-color);
    color: white;
}

.ebook-action-btn.primary:hover {
    background-color: #3a5ecc;
}

/* Responsive Design */
@media (max-width: 992px) {
    .content-area {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .profile-list {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }
    
    .sidebar-menu {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }
    
    .storage-info {
        display: none;
    }
}

@media (max-width: 768px) {
    .main-nav {
        padding: 1rem;
    }
    
    .logo h1 {
        display: none;
    }
    
    .dashboard {
        padding: 1rem;
    }
    
    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .action-buttons {
        width: 100%;
    }
    
    .action-btn {
        flex: 1;
        justify-content: center;
    }
    
    .milestone-timeline {
        padding-left: 1.5rem;
    }
    
    .milestone-dot {
        left: -1.5rem;
    }
    
    .milestone-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }
}

@media (max-width: 576px) {
    .user-menu .username {
        display: none;
    }
    
    .upgrade-btn span {
        display: none;
    }
    
    .ebook-page {
        padding: 1rem;
    }
}