:root {
    /* Dark theme colors */
    --primary-color: #4a90e2;
    --secondary-color: #1a1a1a;
    --accent-color: #e74c3c;
    --background-color: #121212;
    --text-color: #ffffff;
    --card-color: #1e1e1e;
    --border-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --success-color: #2ecc71;
    --warning-color: #f1c40f;
    --error-color: #ff7675;
    --input-bg: #2a2a2a;
    --input-border: #404040;
    --input-text: #ffffff;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Input styles */
.task-input input,
.task-input select,
.task-search input,
.duration-input input,
.sound-volume input {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--input-text);
    padding: 0.8rem;
    border-radius: 5px;
    font-size: 1rem;
    transition: all var(--transition-speed);
}

.task-input input:focus,
.task-input select:focus,
.task-search input:focus,
.duration-input input:focus,
.sound-volume input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

.task-input input::placeholder,
.task-search input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

/* Select dropdown styles */
.task-input select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3e%3cpath d='M7 10l5 5 5-5z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.8rem center;
    background-size: 1.2rem;
    padding-right: 2.5rem;
}

/* Task item styles */
.task-item {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--input-text);
    transition: all var(--transition-speed);
}

.task-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

/* Filter button styles */
.filter-btn {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--input-text);
    transition: all var(--transition-speed);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Settings input styles */
.setting-group input[type="checkbox"] {
    accent-color: var(--primary-color);
}

.setting-group input[type="range"] {
    accent-color: var(--primary-color);
}

/* Modal styles */
.sound-options,
.shortcuts-modal {
    background-color: var(--card-color);
    border: 1px solid var(--input-border);
}

/* Remove dark mode specific styles */
[data-theme="dark"] {
    display: none;
}

.theme-toggle {
    display: none;
}

.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

/* Navbar Styles */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 1.2rem;
    background-color: var(--card-color);
    border-radius: 10px;
    box-shadow: 0 2px 10px var(--shadow-color);
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all var(--transition-speed);
}

.nav-links a:hover,
.nav-links a.active {
    background-color: var(--primary-color);
    color: white;
}

/* Timer Section */
.timer-section {
    position: relative;
    background-color: var(--card-color);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow-color);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.timer-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1501854140801-50d01698950b?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    opacity: 0.15;
    z-index: 0;
}

.timer-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.timer-progress {
    position: relative;
    width: 250px;
    height: 250px;
    margin-bottom: 0.5rem;
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring-circle-bg {
    stroke: rgba(255, 255, 255, 0.1);
}

.progress-ring-circle {
    stroke: var(--primary-color);
    transition: stroke-dashoffset var(--transition-speed);
}

.timer-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    font-weight: bold;
    color: var(--text-color);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

#milliseconds {
    font-size: 1.5rem;
    opacity: 0.8;
}

.timer-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.control-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-speed);
    font-size: 1.2rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.control-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.control-btn.active {
    background-color: var(--accent-color);
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.control-btn:disabled {
    background-color: var(--border-color);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.timer-modes {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 0.5rem;
}

.mode-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid var(--primary-color);
    color: var(--text-color);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition-speed);
    font-size: 0.9rem;
}

.mode-btn:hover,
.mode-btn.active {
    background-color: var(--primary-color);
    color: white;
}

.session-count {
    font-size: 1.1rem;
    color: var(--text-color);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    background-color: var(--input-bg);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid var(--input-border);
}

.session-count span:first-child {
    color: rgba(255, 255, 255, 0.7);
}

#sessionCount {
    color: var(--primary-color);
    font-weight: bold;
}

#totalSessions {
    color: var(--text-color);
    opacity: 0.7;
}

/* Tasks Section */
.tasks-section {
    background-color: var(--card-color);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow-color);
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

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

.task-filters {
    display: flex;
    gap: 0.5rem;
}

.task-input {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
}

.task-input input[type="text"] {
    flex: 1;
}

#addTaskBtn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-speed);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

#addTaskBtn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    background-color: #5a9fe2;
}

#addTaskBtn:active {
    transform: scale(0.95);
}

.task-search {
    position: relative;
    margin-bottom: 1rem;
}

.task-search input {
    width: 100%;
    padding: 0.8rem;
    padding-left: 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
}

.task-search i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-color);
}

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

.task-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    margin-bottom: 0.5rem;
    transition: all var(--transition-speed);
}

.task-item:hover {
    box-shadow: 0 2px 5px var(--shadow-color);
}

.task-item.completed {
    opacity: 0.7;
}

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

.task-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.task-text {
    flex: 1;
}

.task-due-date {
    color: var(--text-color);
    font-size: 0.9rem;
}

.task-priority {
    padding: 0.3rem 0.6rem;
    border-radius: 3px;
    font-size: 0.8rem;
}

.task-priority.high {
    background-color: var(--accent-color);
    color: white;
}

.task-priority.medium {
    background-color: var(--warning-color);
    color: var(--text-color);
}

.task-priority.low {
    background-color: var(--success-color);
    color: white;
}

.task-actions {
    display: flex;
    gap: 0.5rem;
}

.task-actions button {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    transition: all var(--transition-speed);
}

.task-actions button:hover {
    color: var(--primary-color);
}

/* Stats Section */
.stats-section {
    background-color: var(--card-color);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow-color);
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background-color: var(--secondary-color);
    padding: 1.2rem;
    border-radius: 10px;
    text-align: center;
    transition: all var(--transition-speed);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 10px var(--shadow-color);
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.stat-card h3 {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.stat-card p {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.stats-charts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.chart-container {
    background-color: var(--secondary-color);
    padding: 1.5rem;
    border-radius: 10px;
}

.chart-container h3 {
    margin-bottom: 1rem;
    text-align: center;
}

/* Settings Section */
.settings-section {
    background-color: var(--card-color);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow-color);
    color: var(--text-color);
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.setting-group {
    background-color: var(--secondary-color);
    padding: 1.2rem;
    border-radius: 10px;
}

.setting-group h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.duration-settings,
.sound-settings,
.notification-settings,
.data-settings {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.duration-input,
.sound-toggle,
.sound-volume,
.sound-select,
.notification-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn:hover {
    background-color: var(--primary-color);
    opacity: 0.9;
}

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

/* Ambient Sounds */
.ambient-sounds {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 100;
}

.sound-toggle-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-speed);
    box-shadow: 0 4px 10px var(--shadow-color);
}

.sound-toggle-btn:hover {
    transform: scale(1.1);
}

.sound-options {
    position: absolute;
    bottom: 60px;
    right: 0;
    background-color: var(--secondary-color);
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px var(--shadow-color);
    display: none;
}

.sound-options.active {
    display: block;
}

.sound-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.sound-option:hover {
    background-color: var(--secondary-color);
}

/* Keyboard Shortcuts */
.keyboard-shortcuts {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 100;
}

.shortcuts-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-speed);
    box-shadow: 0 4px 10px var(--shadow-color);
}

.shortcuts-btn:hover {
    transform: scale(1.1);
}

.shortcuts-modal {
    position: absolute;
    bottom: 60px;
    left: 0;
    background-color: var(--secondary-color);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px var(--shadow-color);
    display: none;
}

.shortcuts-modal.active {
    display: block;
}

.shortcuts-modal h3 {
    margin-bottom: 1rem;
}

.shortcuts-modal ul {
    list-style: none;
}

.shortcuts-modal li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

kbd {
    background-color: var(--secondary-color);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-family: monospace;
    font-size: 0.9rem;
}

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

.animate-fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        padding: 10px;
    }

    .navbar {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        width: 100%;
        justify-content: space-between;
    }

    .timer-progress {
        width: 200px;
        height: 200px;
    }

    .timer-display {
        font-size: 2.5rem;
    }

    #milliseconds {
        font-size: 1.2rem;
    }

    .task-input {
        flex-direction: column;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }

    .ambient-sounds,
    .keyboard-shortcuts {
        bottom: 1rem;
        right: 1rem;
    }

    .control-btn {
        width: 45px;
        height: 45px;
        padding: 0.6rem;
    }

    .mode-btn {
        padding: 0.3rem 0.6rem;
        font-size: 0.8rem;
    }
}

/* Task Type Selector */
.task-type-selector {
    margin: 1rem 0;
    text-align: center;
}

.task-type-selector select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--accent-color);
    border-radius: 25px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.task-type-selector select:hover {
    background: var(--accent-color);
    color: var(--bg-color);
}

/* Sound Recommendation */
.sound-recommendation {
    background: var(--card-bg);
    padding: 1rem;
    border-radius: 10px;
    margin: 1rem 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.sound-recommendation p {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.sound-recommendation .sound-option {
    background: var(--accent-color);
    color: var(--bg-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.sound-recommendation .sound-option:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Accountability Message */
.accountability-message {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--card-bg);
    padding: 1rem 2rem;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

.accountability-message .message-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.accountability-message i {
    color: var(--accent-color);
    font-size: 1.5rem;
}

.accountability-message p {
    margin: 0;
    color: var(--text-color);
    font-size: 1rem;
}

/* Animation classes */
.animate__animated {
    animation-duration: 0.5s;
}

.animate__fadeIn {
    animation-name: fadeIn;
}

.animate__fadeOut {
    animation-name: fadeOut;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, 20px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translate(-50%, 0);
    }
    to {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
}