/* GLOBAL LAYOUT FIX (For Footer) */
body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main.app-body {
    flex: 1; /* Pushes footer down */
}

/* Tool Container */
.tool-container {
    max-width: 600px; margin: 0 auto; padding: 20px 16px;
}

/* Cards */
.input-card {
    background-color: var(--bg-surface); padding: 24px; border-radius: var(--radius-lg);
    border: 1px solid var(--border-color); box-shadow: var(--shadow-sm);
    margin-bottom: 24px; animation: fadeIn 0.3s ease-out;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color); border-radius: var(--radius-md);
    padding: 40px 20px; text-align: center; cursor: pointer; background-color: var(--bg-body);
}
.upload-area:active { background-color: var(--primary-light); border-color: var(--primary-blue); }
.upload-icon { color: var(--primary-blue); margin-bottom: 12px; }

/* Preview */
.preview-wrapper {
    width: 100%; margin-bottom: 20px; text-align: center; position: relative;
    background-color: #000; padding: 0; border-radius: var(--radius-md); overflow: hidden;
}

.size-tag {
    position: absolute; top: 10px; right: 10px;
    background: rgba(0,0,0,0.7); color: white; padding: 4px 8px;
    border-radius: 4px; font-size: 0.75rem; font-weight: 600;
}

/* Slider */
.custom-range {
    -webkit-appearance: none; width: 100%; height: 8px; border-radius: 5px;
    background: var(--border-color); outline: none; margin: 10px 0;
}
.custom-range::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none; width: 22px; height: 22px;
    border-radius: 50%; background: var(--primary-blue); cursor: pointer; border: 2px solid white;
}

/* Buttons */
.primary-btn {
    background-color: var(--primary-blue); color: white; border: none;
    padding: 14px; border-radius: var(--radius-md); font-weight: 600; cursor: pointer;
    font-size: 1rem; display: flex; align-items: center; justify-content: center; gap: 8px;
    width: 100%; transition: transform 0.1s;
}
.primary-btn:active { transform: scale(0.98); }

.secondary-btn {
    background: transparent; border: 2px solid var(--border-color);
    color: var(--text-main); padding: 14px; border-radius: var(--radius-md);
    font-weight: 600; cursor: pointer; width: 100%;
}

/* Utils */
.hidden { display: none !important; }
.full-width { width: 100%; }

/* Modal */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.6); z-index: 2000;
    display: flex; align-items: center; justify-content: center; padding: 20px; backdrop-filter: blur(4px);
}
.modal-content {
    background: var(--bg-surface); width: 100%; max-width: 400px;
    border-radius: var(--radius-lg); padding: 24px;
}
.modal-header { display: flex; justify-content: space-between; margin-bottom: 16px; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}