/* /wp-content/themes/hello-elementor/split-pdf.css */
:root {
    --primary-color: #2dd4bf; --secondary-color: #6366f1; --bg-main: #fbfbff; --bg-white: #ffffff;
    --text-dark: #111827; --text-light: #6b7280; --border-color: #e5e7eb; --radius-lg: 16px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); --pdf-color: #ef4444;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { overflow-x: hidden; }
body { font-family: 'Poppins', sans-serif; background-color: var(--bg-main); color: var(--text-dark); line-height: 1.6; }
.container { width: 90%; max-width: 900px; margin: 0 auto; padding: 0 15px; }
.full-width { width: 100vw; margin-left: calc(50% - 50vw); }

header { position: sticky; top: 0; z-index: 1000; background-color: var(--bg-white); box-shadow: var(--shadow); border-bottom: 3px solid transparent; border-image: linear-gradient(to right, var(--primary-color), var(--secondary-color)) 1; }
.header-container { display: flex; align-items: center; justify-content: space-between; height: 72px; max-width: 1400px; margin: 0 auto; padding: 0 30px; }
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo i.pdf-icon { font-size: 2.2rem; color: white; background-color: var(--pdf-color); padding: 8px; border-radius: 50%; transition: var(--transition); }
.logo i.pdf-icon:hover { background-color: #d32f2f; } /* Darker red fallback */
.logo-text { font-size: 1.6rem; font-weight: 700; color: var(--text-dark); }
.main-nav { display: flex; align-items: center; gap: 8px; }
.nav-item { list-style: none; position: relative; }
.nav-link { display: flex; align-items: center; gap: 6px; font-weight: 500; color: var(--text-light); text-decoration: none; padding: 8px 16px; border-radius: 8px; transition: var(--transition); }
.nav-link:hover { color: var(--text-dark); background-color: var(--bg-main); }
.nav-link .chevron { font-size: 0.7rem; }

.tool-wrapper { padding: 60px 0; }
.tool-header { text-align: center; margin-bottom: 40px; }
.tool-header i.pdf-icon { font-size: 3.5rem; color: white; background-color: var(--pdf-color); padding: 12px; border-radius: 50%; transition: var(--transition); }
.tool-header i.pdf-icon:hover { background-color: #d32f2f; } /* Darker red fallback */
.tool-header h1 { font-size: 2.8rem; font-weight: 700; }
.tool-header p { font-size: 1.1rem; color: var(--text-light); max-width: 600px; margin: 10px auto 0; }

#upload-area { background-color: var(--bg-white); border-radius: var(--radius-lg); padding: 40px; text-align: center; box-shadow: var(--shadow-lg); border: 2px dashed var(--border-color); transition: var(--transition); }
#upload-area.dragover { border-color: var(--secondary-color); background-color: #faf8ff; transform: scale(1.02); }
#upload-btn { display: inline-block; padding: 18px 40px; background-image: linear-gradient(to right, var(--primary-color), var(--secondary-color)); color: white; border: none; border-radius: 12px; font-weight: 600; font-size: 1.2rem; cursor: pointer; transition: var(--transition); }
#upload-btn:hover { transform: translateY(-3px); }
#upload-text { margin-top: 20px; color: var(--text-light); }
#file-input { display: none; }

#preview-area { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 20px; margin-top: 40px; }
.page-preview { position: relative; background-color: var(--bg-white); border-radius: 8px; box-shadow: var(--shadow); padding: 10px; text-align: center; cursor: grab; }
.page-preview.dragging { opacity: 0.5; }
.page-preview img { max-width: 100%; height: auto; border: 1px solid var(--border-color); }
.page-preview .name { font-size: 0.8rem; word-break: break-all; margin-top: 5px; }
.page-preview .remove-btn { position: absolute; top: -5px; right: -5px; background: var(--pdf-color); color: white; border: none; width: 20px; height: 20px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; }

#range-selection { text-align: center; margin-top: 20px; }
#range-input { padding: 12px; width: 100%; max-width: 300px; border: 2px solid var(--border-color); border-radius: var(--radius-lg); font-size: 1rem; text-align: center; }
#range-selection p { font-size: 1.1rem; color: var(--text-light); margin-bottom: 10px; }

#action-area { text-align: center; margin-top: 40px; }
.action-btn { display: inline-block; padding: 18px 40px; background-image: linear-gradient(to right, var(--secondary-color), var(--primary-color)); color: white; border: none; border-radius: 12px; font-weight: 600; font-size: 1.2rem; cursor: pointer; transition: var(--transition); }
.action-btn:disabled { background-image: none; background-color: var(--text-light); cursor: not-allowed; }
.action-btn:hover:not(:disabled) { transform: translateY(-3px); }
#progress { margin-top: 10px; font-size: 1rem; color: var(--text-light); display: none; }
#split-option { margin-bottom: 20px; }
#split-option label { margin-right: 20px; font-size: 1rem; color: var(--text-dark); }
#split-option input { margin-right: 5px; }