/* ============================================
   Gemini Icon Remover - Styles
   Dark mode aesthetic for image editing
   ============================================ */

/* CSS Variables */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    --border-color: #30363d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-primary: #58a6ff;
    --accent-secondary: #1f6feb;
    --accent-hover: #388bfd;
    --success: #238636;
    --success-hover: #2ea043;
    --danger: #da3633;
    --warning: #f0883e;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.2s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   Header
   ============================================ */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo svg {
    width: 32px;
    height: 32px;
    color: var(--accent-primary);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   Main Content
   ============================================ */
.main-content {
    flex: 1;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* ============================================
   Upload Section
   ============================================ */
.upload-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.upload-area {
    width: 100%;
    max-width: 500px;
    height: 300px;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-secondary);
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.upload-content {
    text-align: center;
    padding: 2rem;
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.upload-area:hover .upload-icon {
    color: var(--accent-primary);
}

.upload-content h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.browse-link {
    color: var(--accent-primary);
    text-decoration: underline;
    cursor: pointer;
}

.file-types {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 0.75rem;
}

/* ============================================
   Editor Section
   ============================================ */
.editor-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.editor-section.hidden {
    display: none;
}

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

.tool-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-right: 1rem;
    border-right: 1px solid var(--border-color);
}

.tool-group:last-child {
    border-right: none;
    padding-right: 0;
}

.tool-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.tool-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.tool-btn.active {
    background: var(--accent-secondary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.tool-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.tool-btn svg {
    width: 18px;
    height: 18px;
}

/* Manual Controls */
.manual-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.manual-controls.hidden {
    display: none;
}

.brush-control {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brush-control label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.brush-control input[type="range"] {
    width: 100px;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-hover);
    border-radius: 3px;
    outline: none;
}

.brush-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.brush-control input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--accent-hover);
    transform: scale(1.1);
}

#brush-size-value {
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 40px;
}

/* ============================================
   Canvas Container
   ============================================ */
.canvas-container {
    position: relative;
    display: flex;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    min-height: 400px;
    overflow: hidden;
}

.canvas-wrapper {
    position: relative;
    display: inline-block;
    max-width: 100%;
}

#main-canvas,
#overlay-canvas {
    display: block;
    max-width: 100%;
    max-height: 70vh;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

#overlay-canvas {
    position: absolute;
    top: 0;
    left: 0;
    /* pointer-events: none; */
}

.selection-preview {
    position: absolute;
    border: 2px solid var(--accent-primary);
    background: rgba(88, 166, 255, 0.2);
    border-radius: var(--radius-sm);
    pointer-events: none;
}

.selection-preview.hidden {
    display: none;
}

/* Progress Overlay */
.progress-overlay {
    position: absolute;
    inset: 0;
    background: rgba(13, 17, 23, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    border-radius: var(--radius);
}

.progress-overlay.hidden {
    display: none;
}

.progress-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

#progress-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   Action Bar
   ============================================ */
.action-bar {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn svg {
    width: 20px;
    height: 20px;
}

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

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

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

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

.btn.hidden {
    display: none;
}

/* ============================================
   Instructions
   ============================================ */
.instructions {
    text-align: center;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.instructions p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1rem 2rem;
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ============================================
   Utility Classes
   ============================================ */
.hidden {
    display: none !important;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }

    .logo h1 {
        font-size: 1.2rem;
    }

    .main-content {
        padding: 1rem;
    }

    .upload-section {
        min-height: 300px;
    }

    .upload-area {
        height: 250px;
    }

    .toolbar {
        justify-content: center;
    }

    .tool-group {
        border-right: none;
        padding-right: 0;
        width: 100%;
        justify-content: center;
    }

    .tool-btn span {
        display: none;
    }

    .manual-controls {
        flex-direction: column;
        width: 100%;
    }

    .brush-control {
        width: 100%;
        justify-content: center;
    }

    .brush-control input[type="range"] {
        flex: 1;
        max-width: 200px;
    }

    .canvas-container {
        padding: 1rem;
        min-height: 300px;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .logo svg {
        width: 24px;
        height: 24px;
    }

    .upload-content h3 {
        font-size: 1rem;
    }

    .upload-content p {
        font-size: 0.85rem;
    }
}

/* ============================================
   Canvas Cursor Styles
   ============================================ */
.canvas-wrapper.manual-mode {
    cursor: crosshair;
}

.canvas-wrapper.processing {
    cursor: wait;
}