.site-header {
    padding: 0 3.5rem !important;
}

.page-wrapper {
    max-width: 1100px !important;
}

.nav-container {
    max-width: 1100px !important;
    margin: 0 auto;
    padding: 0 20px;
}

.tool-header { text-align: center; margin-bottom: 2rem; }

.upload-zone {
    background: #fff;
    border: 2px dashed var(--primary-color);
    border-radius: 8px;
    padding: 4rem 2rem;
    margin: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: background 0.3s;
}

.upload-zone:hover { background: #f0f7ff; }

.btn {
    padding: 0.5rem 1.5rem;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: 0.2s;
}

div#download-links {
    display: inline-flex;
}

a.btn.btn-primary.btn-block {
    margin: 10px !important;
}

.btn-primary { background: var(--primary-color); color: #fff; }
.btn-primary:hover { background: #1a56a0; }
.btn-block { width: 100%; }
.hidden { display: none !important; }

.editor-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 1rem;
}

div#editor-container {
    padding: 10px;
}

.card {
    background: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.preview-header {
    display: inline-flex;
    flex-wrap: wrap;
}

.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; }
.form-group input, .form-group select {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.thumbnail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1.5rem;
    max-height: 70vh;
    overflow-y: auto;
    padding: 10px;
}

.thumb-item {
    background: #fff;
    padding: 10px;
    border: 2px solid transparent;
    border-radius: 4px;
    position: relative;
    cursor: move;
}

.thumb-item.selected { border-color: var(--primary-color); }
.thumb-item canvas { width: 100%; height: auto; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
.page-num {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
}

#loader { text-align: center; padding: 3rem; }
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

@media (max-width: 768px) {
    .editor-layout { grid-template-columns: 1fr; }
    .site-header { padding: 0 0rem !important; }
}