/* Image Combiner Styles - Following keimlab design conventions */

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.app-description {
    text-align: center;
    margin-bottom: 40px;
}

.app-description h2 {
    color: var(--counter-color);
    margin-bottom: 10px;
}

.app-description p {
    color: var(--subtext-color);
    font-size: 1.1em;
}

/* Controls Section */
.controls {
    background-color: var(--control-panel-color);
    border: 1px solid var(--counter-color);
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 30px;
}

.control-group {
    margin-bottom: 30px;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group h3 {
    color: var(--counter-color);
    margin-bottom: 15px;
    font-size: 1.2em;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 5px;
    display: inline-block;
}

/* Upload Section */
.upload-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.upload-area {
    position: relative;
    border: 2px dashed var(--counter-color);
    border-radius: 8px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--background-color);
}

.upload-area:hover {
    border-color: var(--accent-color);
    background-color: rgba(16, 185, 129, 0.05);
}

.upload-area.drag-over {
    border-color: var(--accent-color);
    background-color: rgba(16, 185, 129, 0.1);
    border-style: solid;
}

.upload-area.has-image {
    border-style: solid;
    border-color: var(--accent-color);
}

.upload-placeholder {
    text-align: center;
    color: var(--subtext-color);
}

.upload-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 10px;
}

.upload-placeholder p {
    margin: 0;
    font-size: 1em;
}

.preview-canvas {
    max-width: 100%;
    max-height: 250px;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Frame Controls */
.frame-controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 1.1em;
    color: var(--counter-color);
}

.checkbox-container input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--counter-color);
    border-radius: 3px;
    margin-right: 10px;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-container input[type="checkbox"]:checked + .checkmark {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.checkbox-container input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.frame-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    padding: 15px;
    background-color: var(--background-color);
    border-radius: 4px;
    border: 1px solid var(--counter-color);
    transition: opacity 0.3s ease;
}

.frame-options.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.frame-setting {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.frame-setting label {
    color: var(--counter-color);
    font-size: 0.9em;
    font-weight: 500;
}

.frame-setting input[type="color"] {
    width: 60px;
    height: 40px;
    border: 1px solid var(--counter-color);
    border-radius: 4px;
    cursor: pointer;
    background: none;
}

.frame-setting input[type="range"] {
    width: 100%;
    margin: 5px 0;
}

#frame-width-value {
    color: var(--subtext-color);
    font-size: 0.9em;
}

/* Preview Section */
.preview-section {
    text-align: center;
}

.output-canvas {
    max-width: 100%;
    max-height: 400px;
    border: 2px solid var(--counter-color);
    border-radius: 8px;
    background-color: var(--background-color);
    margin-bottom: 15px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.canvas-info {
    color: var(--subtext-color);
    font-size: 0.9em;
}

.canvas-info p {
    margin: 0;
}

/* Button Group */
.button-group {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
}

.primary-button,
.secondary-button,
.reset-button {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 120px;
}

.primary-button {
    background-color: var(--accent-color);
    color: var(--text-color);
}

.primary-button:hover:not(:disabled) {
    background-color: var(--counter-color);
    transform: translateY(-2px);
}

.primary-button:disabled {
    background-color: var(--subtext-color);
    cursor: not-allowed;
    opacity: 0.6;
}

.secondary-button {
    background-color: var(--counter-color);
    color: var(--text-color);
}

.secondary-button:hover:not(:disabled) {
    background-color: var(--accent-color);
    transform: translateY(-2px);
}

.secondary-button:disabled {
    background-color: var(--subtext-color);
    cursor: not-allowed;
    opacity: 0.6;
}

.reset-button {
    background-color: var(--background-color);
    color: var(--counter-color);
    border: 1px solid var(--counter-color);
}

.reset-button:hover {
    background-color: var(--counter-color);
    color: var(--text-color);
    transform: translateY(-2px);
}

/* Help Section */
.help-section {
    background-color: var(--background-color);
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 30px;
}

.help-section h3 {
    color: var(--counter-color);
    margin-bottom: 15px;
    font-size: 1.1em;
}

.help-section ol {
    color: var(--counter-color);
    margin-bottom: 15px;
    padding-left: 20px;
}

.help-section li {
    margin-bottom: 8px;
    line-height: 1.4;
}

.help-section p {
    color: var(--subtext-color);
    margin: 0;
    font-style: italic;
}

/* Back Button */
.back-button {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    background-color: var(--accent-color);
    color: var(--text-color);
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
    text-align: center;
    max-width: 200px;
}

.back-button:hover {
    background-color: var(--counter-color);
    transform: translateY(-2px);
    color: var(--text-color);
}

/* Mobile Responsive Design */
@media screen and (max-width: 768px) {
    .app-container {
        padding: 15px;
    }

    .controls {
        padding: 20px;
    }

    .upload-section {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .upload-area {
        min-height: 150px;
    }

    .upload-icon {
        font-size: 36px;
    }

    .frame-options {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .button-group {
        flex-direction: column;
        align-items: center;
    }

    .primary-button,
    .secondary-button,
    .reset-button {
        width: 100%;
        max-width: 280px;
    }

    .help-section {
        padding: 15px;
    }

    .output-canvas {
        max-height: 300px;
    }
}

@media screen and (max-width: 480px) {
    .app-container {
        padding: 10px;
    }

    .controls {
        padding: 15px;
    }

    .upload-area {
        min-height: 120px;
    }

    .upload-icon {
        font-size: 28px;
    }

    .upload-placeholder p {
        font-size: 0.9em;
    }

    .control-group h3 {
        font-size: 1.1em;
    }

    .app-description h2 {
        font-size: 1.5em;
    }

    .help-section h3 {
        font-size: 1em;
    }
}

/* Animation for drag and drop */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

.upload-area.drag-over .upload-icon {
    animation: bounce 1s infinite;
}

/* Loading state */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

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