/* pdf-merger-tool.css - Finalized and Scoped Styles */

:root {
    --primary-color: #e34c56; /* Red Tone */
    --primary-hover: #c43841;
    --secondary-btn: #6c757d; /* Grey for secondary actions */
    --secondary-hover: #5a6268;
    --accent-color: #007bff;
    --background-color: #f8f9fa; 
    --card-bg: #ffffff;
    --border-color: #dee2e6;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    --success-bg: #d4edda;
    --success-text: #155724;
    --error-bg: #f8d7da;
    --error-text: #721c24;
    --tertiary-color: #6c757d;
    --transition-speed: 0.3s;
}

/* --- Core Container FIX (High Specificity) --- */
#pdf-merger-plugin.merger-container {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif !important;
    color: #343a40 !important;
    width: 100% !important;
    max-width: 1200px !important;
    display: grid !important;
    grid-template-columns: 2fr 1fr !important; 
    gap: 30px !important; /* Increased gap */
    margin: 30px auto !important;
    padding: 0 15px !important; /* Small side padding for mobile */
    box-sizing: border-box !important;
}

/* --- Card Styles --- */
.card {
    background: var(--card-bg) !important;
    border-radius: 10px !important; /* Slightly more modern radius */
    box-shadow: var(--shadow) !important;
    padding: 25px !important;
    transition: box-shadow var(--transition-speed);
}

/* --- Button Mixins --- */
.btn-primary, .btn-secondary, .merge-btn-main {
    padding: 10px 20px !important;
    border: none !important;
    border-radius: 6px !important;
    font-weight: 600 !important;
    cursor: pointer;
    transition: all var(--transition-speed);
    box-shadow: none !important; 
    text-decoration: none !important;
    text-align: center !important;
}
.btn-primary {
    background-color: var(--primary-color) !important;
    color: white !important;
    width: auto !important;
}
.btn-secondary {
    background-color: transparent !important;
    color: var(--secondary-btn) !important;
    border: 1px solid var(--border-color) !important;
}
.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover) !important;
}
.btn-secondary:hover:not(:disabled) {
    background-color: var(--background-color) !important;
    color: var(--secondary-hover) !important;
}

/* --- Drop Zone --- */
.drop-zone {
    border: 3px dashed var(--border-color) !important;
    border-radius: 10px !important;
    padding: 50px 20px !important;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition-speed), background-color var(--transition-speed);
}
.drop-zone.dragover {
    border-color: var(--primary-color) !important;
    background-color: #ffe6e8 !important;
}
.pdf-icon {
    color: var(--primary-color);
    margin-bottom: 10px;
}
.drop-zone h2 {
    font-size: 1.6em !important;
    margin: 0 0 5px 0 !important;
    font-weight: 700 !important;
}
.drop-zone p {
    color: var(--tertiary-color) !important;
    margin: 0 !important;
}
.drop-zone .btn-primary {
    margin: 15px auto !important;
    display: block !important;
}

/* --- File List --- */
.file-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 15px;
}
.file-list-header h3 {
    margin: 0 !important;
    font-size: 1.2em !important;
}
.file-list {
    list-style: none !important;
    padding: 0 !important;
    margin: 0 !important;
}
.file-item {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 12px 0 !important;
    border-bottom: 1px dashed #e9ecef;
    cursor: grab;
}
.file-item-info {
    display: flex;
    align-items: center;
    gap: 12px;
}
.file-name {
    font-weight: 500;
}
.file-size {
    font-size: 0.85em;
    color: var(--tertiary-color);
    margin-left: 10px;
}
.remove-file-btn {
    font-size: 1.4em !important;
    color: var(--tertiary-color) !important;
    line-height: 1 !important;
    background: none !important;
    border: none !important;
}
.empty-state {
    display: flex; /* Flex is needed for the JS logic */
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
    color: var(--tertiary-color);
}
.placeholder-icon {
    color: #ccc;
    margin-bottom: 10px;
}

/* --- Options/Actions --- */
.options-card h3, .actions-card h3 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    margin-top: 0 !important;
    margin-bottom: 15px !important;
    font-size: 1.1em !important;
    font-weight: 700 !important;
}
.option-group h4 {
    font-size: 1em !important;
    font-weight: 600 !important;
    margin-top: 0 !important;
    margin-bottom: 10px !important;
    color: #495057;
}
.option-group label {
    display: flex !important;
    align-items: center;
    cursor: pointer;
    margin-bottom: 8px !important;
    font-weight: 400;
    color: #495057;
    font-size: 0.95em;
}
.option-group input[type="radio"], 
.option-group input[type="checkbox"] {
    margin-right: 10px !important;
    accent-color: var(--primary-color) !important;
    width: 18px !important;
    height: 18px !important;
    /* Reset theme overrides */
    border: 1px solid #ccc !important; 
    box-shadow: none !important;
}
.disabled-setting {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --- Main Action Buttons --- */
.merge-btn-main {
    width: 100% !important;
    padding: 15px !important;
    font-size: 1.2em !important;
    font-weight: 700 !important;
    margin-bottom: 10px !important;
}
.download-btn {
    width: 100% !important;
    background-color: #f0f0f0 !important;
    color: var(--tertiary-color) !important;
    padding: 15px !important;
    border: 1px solid var(--border-color) !important;
    font-weight: 600 !important;
    opacity: 0.6;
}
.merge-btn-main:disabled, .download-btn:disabled {
    opacity: 0.6 !important;
    cursor: not-allowed !important;
}

/* --- Status & Privacy --- */
.private-message {
    background: var(--success-bg) !important;
    color: var(--success-text) !important;
    border-radius: 6px !important;
    padding: 15px !important;
    font-size: 0.9em !important;
    margin-top: 20px !important;
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
}
.lock-icon {
    color: var(--success-text);
}
#merge-status {
    text-align: center !important;
    margin-top: 15px !important;
    font-weight: 500 !important;
    padding: 10px !important;
    border-radius: 6px !important;
    display: none;
}
#merge-status.error {
    background: var(--error-bg) !important;
    color: var(--error-text) !important;
}
#merge-status.success, #merge-status.processing {
    background: var(--success-bg) !important;
    color: var(--success-text) !important;
}

/* Spinner Animation */
.spinner {
    display: inline-block;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    width: 14px;
    height: 14px;
    animation: spin 0.8s linear infinite;
    margin-left: 8px;
    vertical-align: middle;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- Responsive Layout --- */
@media (max-width: 992px) {
    #pdf-merger-plugin.merger-container {
        grid-template-columns: 1fr !important; /* Stack panels on small screens */
    }
}