:root {
    --background-color: #1d1e20;
    --text-color: #e0e0e0;
    --secondary-bg: #252525;
    --background-opacity: 0.95;
    --highlight-color: #ffeb3b;
    --accent-color: #4a90e2;
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    --font-weight-medium: 500;
    --transition-speed: 0.2s;
}

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

body {
    font-family: 'Roboto', sans-serif;
    background: var(--background-color);
    color: var(--text-color);
    line-height: 1.5;
    letter-spacing: 0.2px;
    overflow: hidden;
}

.container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: 250px;
    background: rgba(29, 30, 32, var(--background-opacity));
    backdrop-filter: blur(10px);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease;
    overflow-y: auto;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 1000;
    will-change: transform;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.1));
}

.sidebar-toggle {
    background: var(--accent-color);
    border: none;
    color: #fff;
    font-size: 18px;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-speed) ease, background var(--transition-speed) ease;
    -webkit-tap-highlight-color: transparent;
}

.sidebar-toggle:hover {
    box-shadow: var(--card-shadow);
}

.sidebar-toggle:active {
    transform: scale(0.95);
    opacity: 0.8;
}

.sidebar-toggle.active {
    transform: rotate(90deg);
}

.sidebar-content {
    padding: 15px;
}

.sidebar-btn {
    width: 100%;
    padding: 12px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-color);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: var(--font-weight-medium);
    transition: background var(--transition-speed) ease, transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.sidebar-btn:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1));
    box-shadow: var(--card-shadow);
    transform: translateY(-2px);
}

.sidebar-btn:active {
    transform: scale(0.95);
    opacity: 0.8;
}

.sidebar-btn.disabled {
    pointer-events: none;
    opacity: 0.5;
}

.history-panel {
    margin-bottom: 20px;
}

.history-search {
    width: 100%;
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    border-radius: 8px;
    font-size: 14px;
}

.chat-history-item {
    padding: 12px;
    margin: 5px 0;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    cursor: pointer;
    transition: background var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.chat-history-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(5px);
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: rgba(29, 30, 32, var(--background-opacity));
    margin-left: 250px;
    transition: margin-left 0.3s ease;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: var(--secondary-bg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.back-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: color var(--transition-speed) ease, transform var(--transition-speed) ease;
}

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

.back-btn:active {
    transform: scale(0.95);
    opacity: 0.8;
}

#aiStatus {
    font-size: 14px;
    color: var(--accent-color);
    font-weight: var(--font-weight-medium);
}

.welcome-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    will-change: opacity, transform;
}

.welcome-section h1 {
    font-size: 28px;
    margin-bottom: 10px;
}

.welcome-section p {
    font-size: 16px;
    opacity: 0.8;
}

.chat-messages {
    flex: 1;
    padding: 20px;
    padding-bottom: 100px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.3) transparent;
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

.message {
    display: flex;
    flex-direction: column;
    margin: 15px 0;
    will-change: opacity, transform;
}

.message.user {
    align-self: flex-end;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px 12px 0 12px;
    padding: 12px;
    width: 100%;
    max-width: 100%;
    box-shadow: var(--card-shadow);
}

.message.bot {
    align-self: flex-start;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px 12px 12px 0;
    padding: 12px;
    max-width: 85%;
    box-shadow: var(--card-shadow);
}

.message-content {
    position: relative;
}

.bot-response {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.1));
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    padding: 15px;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed) ease;
}

.bot-response:hover {
    transform: translateY(-2px);
}

.bot-response h4 {
    color: var(--accent-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: var(--font-weight-medium);
}

.bot-response .highlight {
    background: var(--highlight-color);
    color: #000;
    padding: 3px 6px;
    border-radius: 4px;
    display: inline-block;
}

.response-section {
    margin: 10px 0;
    font-size: 15px;
}

.response-section i {
    margin-right: 8px;
    color: var(--accent-color);
}

.action-buttons {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.action-btn {
    background: var(--accent-color);
    border: none;
    color: #fff;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: var(--font-weight-medium);
    transition: background var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.action-btn:hover {
    background: #357abd;
    transform: translateY(-2px);
}

.action-btn:active {
    transform: scale(0.95);
    opacity: 0.8;
}

.thought-process {
    background: rgba(255, 255, 255, 0.05);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 12px;
    cursor: pointer;
}

.thought-content {
    display: none;
}

.thought-content.expanded {
    display: block;
}

.response-options {
    display: none;
    margin-top: 10px;
}

.response-options.active {
    display: flex;
    gap: 10px;
}

.response-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 16px;
    transition: color var(--transition-speed) ease, transform var(--transition-speed) ease;
}

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

.response-btn:active {
    transform: scale(0.95);
    opacity: 0.8;
}

.chat-input-section {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 15px 20px;
    background: var(--secondary-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 500;
    box-sizing: border-box;
}

.input-tools {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.tool-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--text-color);
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    transition: background var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.tool-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.tool-btn:active {
    transform: scale(0.95);
    opacity: 0.8;
}

.chat-input {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 25px;
    padding: 8px;
    box-sizing: border-box;
}

#messageInput {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-color);
    padding: 12px;
    resize: none;
    height: 50px;
    max-height: 120px;
    max-width: 100%;
    font-size: 16px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.3) transparent;
}

#messageInput::-webkit-scrollbar {
    width: 6px;
}

#messageInput::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.send-btn {
    background: var(--accent-color);
    border: none;
    color: #fff;
    padding: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: background var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.send-btn:hover {
    background: #357abd;
    transform: scale(1.05);
}

.send-btn:active {
    transform: scale(0.95);
    opacity: 0.8;
}

.send-btn.thinking {
    animation: pulseGlow 1s infinite;
}

.predictive-suggestions {
    display: none;
    position: absolute;
    bottom: 90px;
    background: rgba(29, 30, 32, 0.95);
    border-radius: 8px;
    padding: 12px;
    max-width: 90%;
    box-shadow: var(--card-shadow);
    transition: opacity var(--transition-speed) ease;
}

.predictive-suggestions.active {
    display: block;
    opacity: 1;
}

.predictive-suggestion {
    padding: 10px;
    cursor: pointer;
    border-radius: 6px;
    transition: background var(--transition-speed) ease;
}

.predictive-suggestion:hover {
    background: rgba(255, 255, 255, 0.1);
}

.pomodoro-modal, .task-dashboard, .calendar-modal, .task-modal, .goal-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.pomodoro-modal.active, .task-dashboard.active, .calendar-modal.active, .task-modal.active, .goal-modal.active {
    display: flex;
}

.modal-content, .dashboard-content {
    background: rgba(29, 30, 32, 0.95);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    max-width: 450px;
    width: 90%;
    box-shadow: var(--card-shadow);
}

.modal-content form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.modal-content label {
    text-align: left;
    font-size: 14px;
    margin-bottom: 5px;
    font-weight: var(--font-weight-medium);
}

.modal-content input, .modal-content select, .modal-content textarea {
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    border-radius: 8px;
    font-size: 14px;
}

.modal-content button {
    padding: 12px;
    background: var(--accent-color);
    border: none;
    color: #fff;
    border-radius: 8px;
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: background var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.modal-content button:hover {
    background: #357abd;
    transform: translateY(-2px);
}

.modal-content button:active {
    transform: scale(0.95);
    opacity: 0.8;
}

#timerDisplay, #calendarView {
    font-size: 36px;
    margin: 20px 0;
    font-weight: var(--font-weight-medium);
}

#startTimerBtn, #resetTimerBtn, .cancel-btn, .close-dashboard-btn, .close-calendar-btn {
    padding: 12px 24px;
    margin: 5px;
    background: var(--accent-color);
    border: none;
    color: #fff;
    border-radius: 8px;
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: background var(--transition-speed) ease, transform var(--transition-speed) ease;
}

#startTimerBtn:hover, #resetTimerBtn:hover, .cancel-btn:hover, .close-dashboard-btn:hover, .close-calendar-btn:hover {
    background: #357abd;
    transform: translateY(-2px);
}

#startTimerBtn:active, #resetTimerBtn:active, .cancel-btn:active, .close-dashboard-btn:active, .close-calendar-btn:active {
    transform: scale(0.95);
    opacity: 0.8;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
    margin: 15px 0;
}

#progressFill {
    height: 100%;
    background: var(--highlight-color);
    width: 0;
    transition: width 0.5s ease;
}

#taskList {
    max-height: 300px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.3) transparent;
}

#taskList::-webkit-scrollbar {
    width: 8px;
}

#taskList::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

.task-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    margin: 8px 0;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.task-item.completed {
    text-decoration: line-through;
    opacity: 0.7;
}

.task-checkbox {
    margin-right: 12px;
}

.calendar-day {
    text-align: left;
}

.calendar-day ul {
    list-style: none;
    padding: 0;
}

.calendar-day li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

@keyframes pulseGlow {
    0% { box-shadow: 0 0 5px rgba(255, 255, 255, 0.3); }
    50% { box-shadow: 0 0 15px rgba(255, 255, 255, 0.5); }
    100% { box-shadow: 0 0 5px rgba(255, 255, 255, 0.3); }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    .sidebar.active {
        transform: translateX(0);
    }
    .chat-container {
        margin-left: 0;
    }
    .message.user {
        max-width: 100%;
    }
    .message.bot {
        max-width: 90%;
    }
    .predictive-suggestions {
        bottom: 80px;
        max-width: 95%;
    }
    .modal-content, .dashboard-content {
        max-width: 95%;
    }
    .chat-input-section {
        padding: 10px;
    }
    .chat-input {
        border-radius: 20px;
    }
    .input-tools {
        flex-wrap: wrap;
    }
    .tool-btn {
        padding: 8px;
    }
    .sidebar-toggle {
        font-size: 16px;
        padding: 6px;
    }
}