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

:root {
    /* Light Theme Colors */
    --light-bg: #f8f9fa;
    --light-card-bg: #ffffff;
    --light-text: #333333;
    --light-secondary: #6c757d;
    --light-border: #dee2e6;
    --light-shadow: rgba(0, 0, 0, 0.1);
    
    /* Dark Theme Colors */
    --dark-bg: #121212;
    --dark-card-bg: #1e1e1e;
    --dark-text: #e0e0e0;
    --dark-secondary: #a0a0a0;
    --dark-border: #2d2d2d;
    --dark-shadow: rgba(0, 0, 0, 0.3);
    
    /* Common Colors */
    --primary: #4361ee;
    --secondary: #3a0ca3;
    --success: #4cc9f0;
    --warning: #f72585;
    --danger: #7209b7;
    --info: #4895ef;
}

body {
    font-family: 'Poppins', sans-serif;
    transition: background-color 0.3s, color 0.3s;
    min-height: 100vh;
}

/* Light Mode */
.light-mode {
    background-color: var(--light-bg);
    color: var(--light-text);
}

.light-mode .container {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

/* Dark Mode */
.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

.dark-mode .container {
    background: linear-gradient(135deg, #2c3e50 0%, #1a1a2e 100%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    margin-bottom: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 6px var(--light-shadow);
    background-color: var(--light-card-bg);
}

.dark-mode .app-header {
    background-color: var(--dark-card-bg);
    box-shadow: 0 4px 6px var(--dark-shadow);
}

.app-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary);
}

.theme-switch-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.theme-label {
    font-weight: 500;
}

.theme-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Main Content */
.app-main {
    flex: 1;
}

.text-controls {
    margin-bottom: 30px;
}

.control-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

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

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

.btn-success {
    background-color: var(--success);
    color: #333;
}

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

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

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

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-edit {
    background-color: #6c757d;
    color: white;
}

/* Text Editor */
.editor-section {
    background-color: var(--light-card-bg);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 6px var(--light-shadow);
    margin-bottom: 30px;
}

.dark-mode .editor-section {
    background-color: var(--dark-card-bg);
    box-shadow: 0 4px 6px var(--dark-shadow);
}

.textarea-container {
    margin-bottom: 25px;
}

.text-editor {
    width: 100%;
    min-height: 200px;
    padding: 20px;
    border: 2px solid var(--light-border);
    border-radius: 10px;
    font-family: 'Poppins', sans-serif;
    font-size: 16px;
    resize: vertical;
    transition: all 0.3s;
    background-color: var(--light-card-bg);
    color: var(--light-text);
}

.dark-mode .text-editor {
    background-color: var(--dark-card-bg);
    color: var(--dark-text);
    border-color: var(--dark-border);
}

.text-editor:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.text-editor:disabled {
    background-color: #f5f5f5;
    cursor: not-allowed;
}

.dark-mode .text-editor:disabled {
    background-color: #2a2a2a;
}

.text-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
    padding: 10px;
    background-color: rgba(67, 97, 238, 0.05);
    border-radius: 8px;
}

.dark-mode .text-info {
    background-color: rgba(67, 97, 238, 0.1);
}

.edit-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    color: var(--primary);
}

/* Stats Section */
.stats-section {
    margin: 30px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: transform 0.3s;
    color: white;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 2rem;
    opacity: 0.8;
}

.stat-content {
    flex: 1;
}

.stat-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 5px;
    opacity: 0.9;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

/* Additional Info */
.additional-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.info-card {
    background-color: var(--light-card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 4px var(--light-shadow);
}

.dark-mode .info-card {
    background-color: var(--dark-card-bg);
    box-shadow: 0 2px 4px var(--dark-shadow);
}

.info-card h3 {
    margin-bottom: 15px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.saved-items {
    max-height: 150px;
    overflow-y: auto;
}

.saved-item {
    background-color: rgba(67, 97, 238, 0.1);
    padding: 10px;
    margin-bottom: 8px;
    border-radius: 6px;
    border-left: 4px solid var(--primary);
}

.saved-item p {
    margin: 5px 0;
    font-size: 14px;
}

.saved-item small {
    color: var(--light-secondary);
    font-size: 12px;
}

.dark-mode .saved-item small {
    color: var(--dark-secondary);
}

.empty-message {
    text-align: center;
    color: var(--light-secondary);
    font-style: italic;
    padding: 20px;
}

.dark-mode .empty-message {
    color: var(--dark-secondary);
}

.instructions {
    list-style: none;
    padding-left: 0;
}

.instructions li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.instructions li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 20px;
    margin-top: 30px;
    border-radius: 15px;
    background-color: var(--light-card-bg);
    box-shadow: 0 -2px 4px var(--light-shadow);
}

.dark-mode .app-footer {
    background-color: var(--dark-card-bg);
    box-shadow: 0 -2px 4px var(--dark-shadow);
}

.app-footer p {
    margin: 5px 0;
    color: var(--light-secondary);
}

.dark-mode .app-footer p {
    color: var(--dark-secondary);
}

.version {
    font-size: 12px;
    opacity: 0.7;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--success);
    color: #333;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 10px;
    transform: translateY(100px);
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
    z-index: 1000;
}

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

.toast-icon {
    font-size: 1.2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .control-group {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .additional-info {
        grid-template-columns: 1fr;
    }
    
    .text-info {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .app-header h1 {
        font-size: 1.4rem;
    }
    
    .editor-section {
        padding: 15px;
    }
}