:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e8e8e8;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --user-bubble: #2563eb;
    --ai-bubble: #f0f0f0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --nav-height: 64px;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --border-color: #404040;
    --accent-color: #3b82f6;
    --accent-hover: #60a5fa;
    --user-bubble: #3b82f6;
    --ai-bubble: #2d2d2d;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.login-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.login-box {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    text-align: center;
    width: 90%;
    max-width: 400px;
}

.login-box h2 {
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 28px;
}

.login-box p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.login-box input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 16px;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.3s;
}

.login-box input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.login-box button {
    width: 100%;
    padding: 14px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.login-box button:hover {
    background: var(--accent-hover);
}

.login-error {
    color: #ef4444;
    font-size: 14px;
    margin-top: 12px;
    display: none;
}

.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 100%;
    margin: 0 auto;
}

.header {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 16px 20px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.main-content {
    flex: 1;
    overflow-y: auto;
    background-color: var(--bg-primary);
    padding-bottom: var(--nav-height);
}

.page {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100%;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

.messages {
    max-width: 100%;
}

.welcome-message {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.welcome-message h2 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.message {
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
}

.message.user {
    align-items: flex-end;
}

.message.ai {
    align-items: flex-start;
}

.message-bubble {
    max-width: 85%;
    padding: 12px 16px;
    border-radius: 16px;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.message.user .message-bubble {
    background-color: var(--user-bubble);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.ai .message-bubble {
    background-color: var(--ai-bubble);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

.message-time {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
    padding: 0 4px;
}

.input-area {
    position: fixed;
    bottom: var(--nav-height);
    left: 0;
    right: 0;
    padding: 12px 16px;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
    z-index: 100;
}

.input-wrapper {
    display: flex;
    gap: 12px;
    max-width: 800px;
    margin: 0 auto;
}

#userInput {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 16px;
    resize: none;
    outline: none;
    font-family: inherit;
    max-height: 150px;
}

#userInput:focus {
    border-color: var(--accent-color);
}

.send-btn {
    padding: 12px 24px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 24px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

.send-btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

.send-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: var(--nav-height);
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 0 8px;
    z-index: 1000;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 4px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    position: relative;
    transition: color 0.2s;
}

.nav-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background-color: var(--accent-color);
    border-radius: 0 0 3px 3px;
    transition: width 0.2s;
}

.nav-item.active {
    color: var(--accent-color);
}

.nav-item.active::after {
    width: 40px;
}

.nav-label {
    font-size: 14px;
    font-weight: 500;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 16px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

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

.modal-body {
    color: var(--text-primary);
}

.skill-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
}

.skill-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.2s;
}

.skill-card:hover {
    border-color: var(--accent-color);
}

.skill-card.active {
    border-color: var(--accent-color);
    background-color: rgba(59, 130, 246, 0.1);
}

.skill-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.skill-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.skill-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.skill-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.rules-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.rule-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
}

.rule-disabled {
    opacity: 0.6;
}

.rule-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}

.rule-name {
    font-weight: 600;
    color: var(--text-primary);
}

.rule-actions {
    display: flex;
    gap: 8px;
}

.rule-content {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 12px;
    padding: 8px;
    background-color: var(--bg-primary);
    border-radius: 6px;
}

.rule-meta {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--text-secondary);
}

.priority-high { color: #ef4444; }
.priority-medium { color: #f59e0b; }
.priority-low { color: #22c55e; }

.rules-count {
    text-align: center;
    color: var(--text-secondary);
    margin-top: 16px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.history-date {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 16px;
    margin-bottom: 8px;
    padding-left: 8px;
    font-weight: 600;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    background-color: var(--bg-secondary);
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.2s;
}

.history-item:hover {
    background-color: var(--bg-tertiary);
}

.history-item-title {
    font-weight: 500;
    color: var(--text-primary);
}

.history-item-time {
    font-size: 12px;
    color: var(--text-secondary);
}

.search-box {
    width: 100%;
    max-width: 200px;
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
}

.search-box:focus {
    outline: none;
    border-color: var(--accent-color);
}

.settings-container {
    max-width: 100%;
}

.setting-section {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
}

.setting-section-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 16px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.radio-group {
    display: flex;
    gap: 24px;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-primary);
}

.icon-picker {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.icon-picker input {
    width: 60px;
    text-align: center;
    font-size: 24px;
}

.icon-suggestions {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.icon-suggestions span {
    padding: 6px 10px;
    background-color: var(--bg-tertiary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 20px;
}

.icon-suggestions span:hover {
    background-color: var(--accent-color);
}

.data-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.btn-danger {
    background-color: #ef4444;
    color: white;
}

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

.save-btn {
    width: 100%;
    margin-top: 16px;
}

.btn-group {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.add-btn {
    display: block;
    width: 100%;
    padding: 20px;
    background-color: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    margin-bottom: 16px;
    transition: all 0.2s;
}

.add-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.notification {
    position: fixed;
    bottom: calc(var(--nav-height) + 80px);
    right: 20px;
    padding: 14px 20px;
    background-color: var(--accent-color);
    color: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
    z-index: 3000;
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

.notification.error {
    background-color: #ef4444;
}

.current-skill {
    text-align: center;
    margin-top: 16px;
    color: var(--accent-color);
    font-weight: 500;
}

@media (max-width: 768px) {
    .nav-label {
        font-size: 12px;
    }
    
    .page {
        padding: 16px;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .page-header .btn {
        width: 100%;
    }
    
    .message-bubble {
        max-width: 90%;
    }
    
    .skill-grid {
        grid-template-columns: 1fr;
    }
    
    .rule-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .rule-actions {
        width: 100%;
    }
    
    .rule-actions .btn {
        flex: 1;
    }
    
    .radio-group {
        flex-direction: column;
        gap: 12px;
    }
    
    .data-actions {
        flex-direction: column;
    }
    
    .data-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 18px;
    }
    
    .page-header h2 {
        font-size: 20px;
    }
    
    .modal-content {
        padding: 16px;
    }
}