:root {
    --primary: #1a1a2e;
    --secondary: #16213e;
    --accent: #0f3460;
    --highlight: #e94560;
    --text: #ffffff;
    --text-secondary: #b8b8b8;
    --card-bg: #22223b;
    --success: #4CAF50;
    --warning: #FF9800;
    --danger: #F44336;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

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

header {
    background-color: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

.logo i {
    font-size: 2rem;
    color: var(--highlight);
}

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

.logo span {
    color: var(--highlight);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.status-bar {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.status-item i {
    color: var(--success);
}

.hero {
    text-align: center;
    padding: 40px 0;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    background: linear-gradient(90deg, var(--highlight), #ff7b9c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 30px;
    color: var(--text-secondary);
}

.section {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.section-title i {
    color: var(--highlight);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.video-card {
    background: var(--secondary);
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.video-thumbnail {
    height: 120px;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    position: relative;
    overflow: hidden;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-info {
    padding: 15px;
}

.video-title {
    font-weight: 600;
    margin-bottom: 5px;
}

.video-duration {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.image-section {
    margin-bottom: 30px;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.image-card {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    aspect-ratio: 1;
    background: var(--secondary);
}

.image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    padding: 10px;
    transform: translateY(100%);
    transition: transform 0.3s;
}

.image-card:hover .image-overlay {
    transform: translateY(0);
}

.image-actions {
    display: flex;
    justify-content: space-between;
}

.upload-info {
    margin: 15px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.progress-bar {
    height: 8px;
    background: var(--secondary);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 5px;
}

.progress {
    height: 100%;
    background: var(--highlight);
    border-radius: 4px;
}

.btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: background 0.3s;
    font-weight: 600;
}

.btn:hover {
    background: var(--highlight);
}

.btn-primary {
    background: var(--highlight);
}

.btn-success {
    background: var(--success);
}

.btn-danger {
    background: var(--danger);
}

.goal-input {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.goal-input input {
    flex: 1;
    padding: 12px 15px;
    border: none;
    border-radius: 8px;
    background: var(--secondary);
    color: var(--text);
}

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

.goal-category {
    background: var(--secondary);
    padding: 20px;
    border-radius: 10px;
}

.goal-category h3 {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.goal-list {
    list-style: none;
}

.goal-item {
    padding: 12px;
    background: var(--card-bg);
    margin-bottom: 10px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.goal-text {
    flex: 1;
}

.goal-actions {
    display: flex;
    gap: 10px;
}

.empty-state {
    text-align: center;
    padding: 30px;
    color: var(--text-secondary);
    font-style: italic;
}

.notes-input {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.notes-input textarea {
    padding: 15px;
    border: none;
    border-radius: 8px;
    background: var(--secondary);
    color: var(--text);
    min-height: 120px;
    resize: vertical;
}

.saved-notes {
    background: var(--secondary);
    padding: 20px;
    border-radius: 10px;
    min-height: 100px;
}

.note-item {
    padding: 15px;
    background: var(--card-bg);
    margin-bottom: 15px;
    border-radius: 8px;
    border-left: 4px solid var(--highlight);
    position: relative;
}

.note-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.note-actions {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 5px;
}

.login-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.login-form {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.login-form h2 {
    text-align: center;
    margin-bottom: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: none;
    border-radius: 8px;
    background: var(--secondary);
    color: var(--text);
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

.url-input-group {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.url-input-group input {
    flex: 1;
}

.file-input-group {
    margin-top: 15px;
    display: flex;
    gap: 10px;
    align-items: center;
}

.file-input-group input[type="file"] {
    display: none;
}

.file-input-label {
    background: var(--accent);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: background 0.3s;
    font-weight: 600;
}

.file-input-label:hover {
    background: var(--highlight);
}

.file-name {
    flex: 1;
    padding: 10px;
    background: var(--secondary);
    border-radius: 8px;
    color: var(--text-secondary);
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tab {
    padding: 10px 20px;
    background: var(--secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
}

.tab.active {
    background: var(--highlight);
}

.hidden {
    display: none;
}

.admin-panel {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
}

.user-list {
    list-style: none;
    margin-top: 20px;
}

.user-item {
    padding: 15px;
    background: var(--secondary);
    margin-bottom: 10px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.message {
    padding: 10px 15px;
    border-radius: 8px;
    margin: 10px 0;
    font-weight: 500;
}

.success {
    background: rgba(76, 175, 80, 0.2);
    color: #4CAF50;
    border-left: 4px solid #4CAF50;
}

.error {
    background: rgba(244, 67, 54, 0.2);
    color: #F44336;
    border-left: 4px solid #F44336;
}

.delete-btn {
    background: rgba(244, 67, 54, 0.2);
    color: #F44336;
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.3s;
}

.delete-btn:hover {
    background: rgba(244, 67, 54, 0.4);
}

.upload-options {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.upload-option {
    flex: 1;
    text-align: center;
    padding: 15px;
    background: var(--secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
}

.upload-option.active {
    background: var(--highlight);
}

.upload-option i {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .status-bar {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .image-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .goal-categories {
        grid-template-columns: 1fr;
    }
    
    .goal-input, .url-input-group, .file-input-group {
        flex-direction: column;
    }
    
    .upload-options {
        flex-direction: column;
    }
}