:root {
    --primary-bg: #1a1a1a;
    --secondary-bg: #2d2d2d;
    --tertiary-bg: #3a3a3a;
    --accent-color: #007acc;
    --accent-hover: #005a9e;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --border-color: #4a4a4a;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-primary);
    overflow-x: hidden;
}

.main-container {
    display: flex;
    height: calc(100vh - 4.3rem);
}

.sidebar {
    max-width: 280px;
    width: 100%;
    background-color: var(--secondary-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.upload-section {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.upload-section.drag-over {
    background-color: var(--tertiary-bg);
    border-color: var(--accent-color);
}

.file-input-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
}

.file-input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-input-button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    width: 100%;
}

.file-input-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 122, 204, 0.3);
}

.preview-container {
    padding: 1rem 1.5rem;
    flex: 1;
    overflow-y: auto;
}

.preview-container h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.preview-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.preview-item {
    position: relative;
    width: 100%;
    height: 120px;
    border: 2px solid transparent;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--tertiary-bg);
}

.preview-item:hover {
    border-color: var(--accent-color);
    transform: scale(1.05);
}

.preview-item.active {
    border-color: var(--accent-color);
    box-shadow: 0 0 15px rgba(0, 122, 204, 0.5);
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 20px;
    height: 20px;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.preview-item:hover .remove-btn {
    opacity: 1;
}

.edit-indicator {
    position: absolute;
    bottom: 4px;
    left: 4px;
    width: 8px;
    height: 8px;
    background-color: var(--accent-color);
    color: var(--accent-color);
    border-radius: 50%;
    font-size: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.editor-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--primary-bg);
}

.toolbar {
    background-color: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

.tool-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    padding: 0.4rem .6rem;
    background-color: var(--tertiary-bg);
    border-radius: 8px;
}

.tool-group label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-right: 0.5rem;
    margin-left: 0.3rem;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
    background-color: var(--tertiary-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

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

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

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

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

.select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--tertiary-bg);
    color: var(--text-primary);
    font-size: 0.85rem;
}

.canvas-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    overflow: hidden; /* Importante para zoom */
    background-color: var(--primary-bg);
}

.canvas-wrapper {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: visible; /* Permite zoom sair dos limites */
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    background-color: var(--secondary-bg);
    display: none; /* Inicialmente oculto */
    transition: transform 0.1s ease-out; /* Suavizar zoom */
    transform-origin: center center;
}

#mainCanvas {
    display: block;
    cursor: default;
    background-color: white;
    user-select: none; /* Evitar seleção de texto */
    -webkit-user-select: none;
    -moz-user-select: none;
}

/* Cursors específicos */
.canvas-grab {
    cursor: grab !important;
}

.canvas-grabbing {
    cursor: grabbing !important;
}

.canvas-crosshair {
    cursor: crosshair !important;
}

.crop-overlay {
    position: absolute;
    border: 2px dashed var(--accent-color);
    background-color: rgba(0, 122, 204, 0.1);
    pointer-events: none;
    display: none;
}

.crop-controls {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    display: none;
    gap: 0.5rem;
}

.zoom-controls {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 10;
}

.zoom-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background-color: var(--secondary-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-size: 1.2rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.zoom-btn:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    transform: scale(1.1);
}

.zoom-level {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.status-bar {
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: 0.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.download-section {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Botão para toggle da sidebar em mobile */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1000;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.sidebar-toggle:hover {
    background-color: var(--accent-hover);
    transform: scale(1.1);
}

/* Overlay para fechar sidebar em mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

/* Touch-friendly adjustments */
.btn, .zoom-btn {
    min-height: 44px;
    min-width: 44px;
}

.file-input-button {
    min-height: 50px;
}

/* Melhor espaçamento para touch */
.tool-group {
    gap: 0.75rem;
}

/* Media Queries Responsivas */
@media (max-width: 1024px) {
    .toolbar {
        padding: 1rem;
        gap: 0.75rem;
    }
    
    .tool-group {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .canvas-container {
        padding: 1rem;
    }
    
    .status-bar {
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .download-section {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
}

@media (max-width: 768px) {
    .sidebar-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .main-container {
        flex-direction: column;
        height: 100vh;
    }
    
    .sidebar {
        position: fixed;
        top: 0;
        left: -100%;
        width: 90%;
        max-width: 350px;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
        box-shadow: 4px 0 15px rgba(0, 0, 0, 0.3);
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .sidebar.open + .editor-area {
        margin-left: 0;
    }
    
    .sidebar-overlay.show {
        display: block;
    }
    
    .editor-area {
        flex: 1;
        width: 100%;
        height: 100vh;
        margin-left: 0;
        transition: margin-left 0.3s ease;
    }
    
    .toolbar {
        padding: 0.5rem;
        gap: 0.5rem;
        flex-wrap: wrap;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    
    .toolbar::-webkit-scrollbar {
        display: none;
    }
    
    .tool-group {
        flex-shrink: 0;
        min-width: fit-content;
        flex-wrap: nowrap;
        padding: 0.5rem;
        gap: 0.25rem;
    }
    
    .tool-group label {
        font-size: 0.75rem;
        white-space: nowrap;
    }
    
    .btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
        white-space: nowrap;
    }
    
    .canvas-container {
        padding: 0.5rem;
        height: calc(100vh - 180px);
    }
    
    .zoom-controls {
        bottom: 0.5rem;
        right: 0.5rem;
        gap: 0.25rem;
    }
    
    .zoom-btn {
        width: 50px;
        height: 50px;
        font-size: 1.4rem;
    }
    
    .zoom-level {
        padding: 0.5rem;
        font-size: 0.9rem;
    }
    
    .status-bar {
        padding: 0.5rem;
        font-size: 0.75rem;
        flex-direction: column;
        gap: 0.5rem;
        align-items: stretch;
    }
    
    .download-section {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .preview-item {
        height: 100px;
    }
    
    .upload-section {
        padding: 1rem;
    }
    
    .preview-container {
        padding: 0.75rem 1rem;
    }
    
    .crop-controls {
        bottom: 0.5rem;
        right: 0.5rem;
        gap: 0.5rem;
    }
    
    .crop-controls .btn {
        padding: 0.75rem;
        font-size: 1rem;
        min-width: 50px;
    }
}

@media (max-width: 480px) {
    .sidebar {
        width: 100%;
        max-width: none;
    }
    
    .toolbar {
        padding: 0.25rem;
    }
    
    .tool-group {
        padding: 0.25rem 0.5rem;
        min-width: auto;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .tool-group label {
        width: 100%;
        text-align: center;
        margin-bottom: 0.25rem;
    }
    
    .btn {
        padding: 0.5rem;
        font-size: 0.75rem;
        min-width: 40px;
    }
    
    .canvas-container {
        padding: 0.25rem;
        height: calc(100vh - 220px);
    }
    
    .zoom-controls {
        bottom: 0.25rem;
        right: 0.25rem;
    }
    
    .status-bar {
        padding: 0.5rem 0.25rem;
    }
    
    .download-section {
        gap: 0.25rem;
    }
    
    .download-section .btn {
        flex: 1;
        min-width: 0;
    }
    
    .preview-grid {
        gap: 0.5rem;
    }
    
    .preview-item {
        height: 80px;
    }
    
    .modal-content {
        width: 95%;
        margin: 0.5rem;
        max-height: 90vh;
    }
    
    .modal-header, .modal-body {
        padding: 1rem;
    }
    
    .about-features {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .shortcut-item {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .shortcut-item kbd {
        min-width: auto;
    }
}

/* Touch gestures and mobile interactions */
@media (hover: none) and (pointer: coarse) {
    .btn:hover {
        transform: none;
    }
    
    .preview-item:hover {
        transform: none;
        border-color: var(--border-color);
    }
    
    .preview-item:active {
        transform: scale(0.95);
        border-color: var(--accent-color);
    }
    
    .zoom-btn:hover {
        transform: none;
    }
    
    .zoom-btn:active {
        transform: scale(0.9);
        background-color: var(--accent-color);
    }
    
    .file-input-button:hover {
        transform: none;
    }
    
    .file-input-button:active {
        transform: scale(0.98);
    }
}

/* Landscape orientation adjustments */
@media (max-width: 768px) and (orientation: landscape) {
    .canvas-container {
        height: calc(100vh - 120px);
    }
    
    .toolbar {
        padding: 0.25rem;
    }
    
    .status-bar {
        flex-direction: row;
        padding: 0.25rem 0.5rem;
    }
    
    .sidebar {
        max-width: 300px;
    }
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    text-align: center;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--text-primary);
}

.toast {
    position: fixed;
    top: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 10000;
    animation: slideIn 0.3s ease;
}

.toast-success {
    background-color: var(--success-color);
}

.toast-error {
    background-color: var(--danger-color);
}

.toast-info {
    background-color: var(--accent-color);
}

.toast-warning {
    background-color: var(--warning-color);
    color: #000;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 10000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--secondary-bg);
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

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

.modal-body {
    padding: 1.5rem;
}

.shortcut-group {
    margin-bottom: 1.5rem;
}

.shortcut-group h4 {
    color: var(--accent-color);
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.shortcut-item kbd {
    background-color: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-family: monospace;
    font-size: 0.8rem;
    color: var(--text-primary);
    min-width: 2rem;
    text-align: center;
}

.shortcut-item span {
    flex: 1;
}

/* Modal Sobre */
.about-content {
    text-align: center;
    padding: 1rem 0;
}

.about-content h4 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.about-content p {
    margin-bottom: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.feature-item {
    background: var(--tertiary-bg);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.feature-item h5 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.feature-item p {
    font-size: 0.9rem;
    margin: 0;
}

.about-footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsivo para menu */
@media (max-width: 768px) {
    .menu-dropdown {
        right: 1rem;
        left: 1rem;
        min-width: auto;
    }
}

/* Ajustes para dispositivos muito pequenos */
@media (max-width: 360px) {
    .sidebar-toggle {
        width: 45px;
        height: 45px;
        top: 0.75rem;
        left: 0.75rem;
        font-size: 1.1rem;
    }
    
    .toolbar {
        padding: 0.125rem;
    }
    
    .btn {
        padding: 0.375rem 0.5rem;
        font-size: 0.7rem;
        min-height: 40px;
        min-width: 35px;
    }
    
    .zoom-btn {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }
    
    .canvas-container {
        height: calc(100vh - 200px);
    }
    
    .preview-item {
        height: 70px;
    }
}

/* Ajustes para tablets */
@media (min-width: 769px) and (max-width: 1024px) {
    .sidebar {
        max-width: 250px;
    }
    
    .toolbar {
        gap: 1rem;
    }
    
    .tool-group {
        gap: 0.75rem;
    }
    
    .canvas-container {
        padding: 1.5rem;
    }
}

/* Estilos para modo escuro em dispositivos móveis */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-bg: #0d1117;
        --secondary-bg: #161b22;
        --tertiary-bg: #21262d;
        --border-color: #30363d;
    }
}

/* Animações otimizadas para dispositivos móveis */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .sidebar {
        transition: none;
    }
    
    .sidebar-toggle {
        transition: none;
    }
}

/* Ajustes para telas de alta densidade */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .zoom-btn, .btn {
        border-width: 0.5px;
    }
    
    .preview-item {
        border-width: 1px;
    }
}

/* Otimizações para performance em mobile */
.canvas-wrapper {
    will-change: transform;
}

.sidebar {
    will-change: left;
}

.sidebar-toggle {
    will-change: transform;
}

/* Scrollbar customizada para mobile */
@media (max-width: 768px) {
    .preview-container {
        scrollbar-width: thin;
        scrollbar-color: var(--accent-color) var(--tertiary-bg);
    }
    
    .preview-container::-webkit-scrollbar {
        width: 6px;
    }
    
    .preview-container::-webkit-scrollbar-track {
        background: var(--tertiary-bg);
    }
    
    .preview-container::-webkit-scrollbar-thumb {
        background: var(--accent-color);
        border-radius: 3px;
    }
}