.btn,
.form-control,
.form-select,
.form-check-input {
    border-radius: 12px;
}

.form-control,
.form-select {
    min-height: 46px;
    border: 1px solid rgba(155, 178, 233, 0.48);
    box-shadow: inset 0 1px 2px rgba(31, 49, 102, 0.03);
}

.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    border-color: rgba(46, 99, 255, 0.52);
    box-shadow: 0 0 0 4px rgba(46, 99, 255, 0.12);
}

.form-label {
    margin-bottom: 8px;
    color: #31486f;
    font-weight: 700;
}

.form-text,
.text-muted {
    color: var(--text-muted) !important;
}

.btn-primary {
    background: linear-gradient(130deg, var(--primary), #5c7cff);
    border: 0;
}

.btn-primary:hover {
    background: linear-gradient(130deg, #2850ed, #4468f5);
}

.btn-success {
    background: linear-gradient(130deg, #189972, #22c495);
    border: 0;
}

.btn-outline-primary {
    border-color: #96adf5;
    color: var(--primary-strong);
}

.btn-outline-primary:hover {
    background: var(--primary-soft);
    border-color: var(--primary);
    color: var(--primary-strong);
}

.alert {
    border-radius: 16px;
    border: 1px solid transparent;
    box-shadow: var(--shadow-sm);
}

.alert-success {
    background: linear-gradient(180deg, #eefdf7, #e8faf4);
    border-color: #b7efd8;
    color: #0f7e5d;
}

.alert-danger {
    background: linear-gradient(180deg, #fff3f5, #ffedf1);
    border-color: #ffc6d1;
    color: #b72844;
}

.feature-section + .feature-section {
    margin-top: 20px;
}

.feature-upload-section,
.feature-options-section,
.feature-action-section {
    width: 100%;
}

.panel-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 14px;
    color: #2547a6;
    font-size: 0.98rem;
    font-weight: 800;
    letter-spacing: 0.01em;
    line-height: 1.35;
}

.panel-section-title i {
    color: var(--primary);
    font-size: 0.95em;
}

.split-options,
.compress-options,
#editTypeSelection,
#cropOptions,
#rotateOptions,
#reorderOptions,
#deleteOptions,
.convert-options {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(245, 249, 255, 0.98)),
        radial-gradient(circle at 100% 0%, rgba(46, 99, 255, 0.06), transparent 30%);
    border: 1px solid rgba(164, 183, 232, 0.34);
    border-radius: 22px;
    padding: 18px;
    box-shadow: var(--shadow-sm);
}

.split-options h6,
.compress-options h6,
.convert-options h6,
.pdf-to-images-option-card h6 {
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-upload-section .file-list,
.feature-options-section .compression-result,
.feature-action-section .btn-merge {
    margin-top: 0;
}

.feature-options-section .form-check:last-child,
.pdf-to-images-option-card .form-check:last-child {
    margin-bottom: 0 !important;
}

.form-check {
    position: relative;
    border-radius: 14px;
    padding: 12px 14px 12px 2.2rem;
    transition: background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    border: 1px solid transparent;
}

.form-check:hover {
    background: var(--surface-soft);
    border-color: rgba(174, 190, 233, 0.34);
}

.form-check-label {
    color: #334a73;
    line-height: 1.65;
}

.form-check-input {
    margin-top: 0.32rem;
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.form-check strong {
    color: #20385f;
}

#rangeOptions,
#groupOptions,
#extractOptions,
#singlePageOptions,
#rangeConvertOptions,
#extractConvertOptions {
    margin-top: 12px !important;
    margin-left: 0 !important;
    padding: 14px;
    border: 1px solid rgba(173, 189, 232, 0.32);
    border-radius: 14px;
    background: rgba(247, 250, 255, 0.92);
}

.feature-options-section .form-check + .form-check {
    margin-top: 4px;
}

.progress-container {
    margin-top: 14px;
    padding: 14px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(172, 189, 232, 0.3);
}

.progress {
    height: 12px;
    border-radius: 999px;
    background: #e4ebfb;
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary), #5f7eff, var(--accent));
}

.progress-info {
    color: var(--text-muted);
}

.download-container {
    margin-top: 22px;
    padding: 20px;
    border-radius: 20px;
    background: linear-gradient(180deg, #f9fbff, #f1f6ff);
    border: 1px solid rgba(164, 183, 232, 0.34);
    box-shadow: var(--shadow-sm);
}

.download-links {
    margin-top: 12px;
}

.download-item {
    background: linear-gradient(180deg, #ffffff, #f9fbff);
    border: 1px solid rgba(171, 188, 231, 0.36);
    border-radius: 14px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.download-item:hover {
    transform: translateY(-1px);
    border-color: rgba(111, 143, 232, 0.42);
    box-shadow: 0 10px 22px rgba(30, 58, 138, 0.1);
}

.compression-result .row {
    row-gap: 10px;
}