/* * Image Watermark Tool - Stylesheet
 * Uses modern CSS variables, Flexbox, and Grid.
 */

:root {
    --iwt-primary: #2271b1;
    --iwt-primary-hover: #135e96;
    --iwt-bg: #f0f0f1;
    --iwt-panel-bg: #ffffff;
    --iwt-border: #c3c4c7;
    --iwt-text: #3c434a;
    --iwt-text-light: #646970;
    --iwt-radius: 6px;
    --iwt-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.iwt-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    color: var(--iwt-text);
    background: var(--iwt-bg);
    padding: 20px;
    border-radius: var(--iwt-radius);
    box-sizing: border-box;
    width: 100%;
}

.iwt-container * {
    box-sizing: border-box;
}

/* Sidebar */
.iwt-sidebar {
    flex: 1 1 300px;
    max-width: 350px;
}

.iwt-panel {
    background: var(--iwt-panel-bg);
    border: 1px solid var(--iwt-border);
    border-radius: var(--iwt-radius);
    padding: 20px;
    box-shadow: var(--iwt-shadow);
}

.iwt-panel h3 {
    margin-top: 0;
    font-size: 1.1rem;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--iwt-border);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Tabs */
.iwt-tabs {
    display: flex;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--iwt-border);
}

.iwt-tab {
    flex: 1;
    background: none;
    border: none;
    padding: 10px;
    cursor: pointer;
    font-weight: 600;
    color: var(--iwt-text-light);
    transition: all 0.2s ease;
}

.iwt-tab.active {
    color: var(--iwt-primary);
    border-bottom: 2px solid var(--iwt-primary);
    margin-bottom: -2px;
}

/* Form Controls */
.iwt-control-group {
    margin-bottom: 15px;
}

.iwt-control-row {
    display: flex;
    gap: 10px;
}

.iwt-control-row .iwt-control-group {
    flex: 1;
}

.iwt-control-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.iwt-control-group input[type="text"],
.iwt-control-group select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--iwt-border);
    border-radius: 4px;
    font-size: 14px;
}

.iwt-control-group input[type="color"] {
    width: 100%;
    height: 36px;
    padding: 2px;
    border: 1px solid var(--iwt-border);
    border-radius: 4px;
    cursor: pointer;
}

.iwt-control-group input[type="range"] {
    width: 100%;
    cursor: pointer;
}

.mt-3 { margin-top: 15px; }
hr { border: 0; border-top: 1px solid var(--iwt-border); margin: 20px 0; }
.iwt-hint { font-size: 0.8rem; color: var(--iwt-text-light); }

/* Position Grid */
.iwt-position-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px;
    margin-bottom: 5px;
    width: 150px;
}

.iwt-position-grid button {
    background: var(--iwt-bg);
    border: 1px solid var(--iwt-border);
    border-radius: 4px;
    height: 35px;
    cursor: pointer;
    color: var(--iwt-text);
    transition: background 0.2s;
}

.iwt-position-grid button:hover,
.iwt-position-grid button.active {
    background: var(--iwt-primary);
    color: white;
    border-color: var(--iwt-primary);
}

/* Buttons */
.iwt-btn {
    display: inline-block;
    padding: 10px 15px;
    background: var(--iwt-bg);
    border: 1px solid var(--iwt-border);
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    text-align: center;
    transition: all 0.2s;
    text-decoration: none;
    color: var(--iwt-text);
}

.iwt-btn-primary {
    background: var(--iwt-primary);
    color: white;
    border-color: var(--iwt-primary);
    width: 100%;
    font-size: 1.05rem;
}

.iwt-btn-primary:hover:not(:disabled) {
    background: var(--iwt-primary-hover);
}

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

.iwt-btn-icon {
    padding: 6px 12px;
}

/* Main Area (Canvas Wrapper) */
.iwt-main-area {
    flex: 3 1 500px;
    display: flex;
    flex-direction: column;
}

.iwt-canvas-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--iwt-panel-bg);
    padding: 10px 15px;
    border: 1px solid var(--iwt-border);
    border-radius: var(--iwt-radius) var(--iwt-radius) 0 0;
    border-bottom: none;
}

.iwt-status-msg {
    font-size: 0.9rem;
    font-weight: 600;
    color: #00a32a;
}

.iwt-workspace {
    flex: 1;
    background: repeating-conic-gradient(#e5e5e5 0% 25%, #f5f5f5 0% 50%) 50% / 20px 20px;
    border: 1px solid var(--iwt-border);
    border-radius: 0 0 var(--iwt-radius) var(--iwt-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    overflow: hidden;
    position: relative;
}

.iwt-dropzone {
    text-align: center;
    color: var(--iwt-text-light);
}

.iwt-dropzone p {
    margin: 15px 0;
    font-size: 1.1rem;
}

.iwt-dropzone.dragover {
    color: var(--iwt-primary);
    transform: scale(1.05);
    transition: all 0.2s;
}

#iwt-canvas {
    max-width: 100%;
    max-height: 80vh;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    cursor: grab;
}
#iwt-canvas:active {
    cursor: grabbing;
}

/* Responsive */
@media (max-width: 768px) {
    .iwt-container {
        flex-direction: column;
    }
    .iwt-sidebar {
        max-width: 100%;
    }
}