* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #0d1117;
    --surface: #161b22;
    --border: #30363d;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --primary: #58a6ff;
    --primary-hover: #79b8ff;
    --danger: #f85149;
    --success: #3fb950;
    --warning: #d29922;
}

[data-theme="light"] {
    --bg: #f6f8fa;
    --surface: #ffffff;
    --border: #d0d7de;
    --text: #1f2328;
    --text-muted: #656d76;
    --primary: #0969da;
    --primary-hover: #0550ae;
    --danger: #cf222e;
    --success: #1a7f37;
    --warning: #9a6700;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
}

header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
}

.theme-toggle:hover {
    border-color: var(--primary);
    color: var(--text);
}

nav {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.nav-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    white-space: nowrap;
    transition: all 0.15s;
}

.nav-btn:hover {
    border-color: var(--text-muted);
    color: var(--text);
}

.nav-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

main {
    padding: 1rem;
    max-width: 800px;
    margin: 0 auto;
}

.view-header {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.view-header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.search-box {
    display: flex;
    gap: 0.5rem;
}

.search-box input {
    flex: 1;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    color: var(--text);
    font-size: 16px;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-btn, .clear-search {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-muted);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    font-size: 0.875rem;
}

.search-btn:hover, .clear-search:hover {
    border-color: var(--primary);
    color: var(--text);
}

.search-btn {
    padding: 0.5rem 0.6rem;
}

.search-count {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.view-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.view-actions {
    display: flex;
    gap: 0.5rem;
}

.add-btn, .report-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.add-btn:hover, .report-btn:hover {
    background: var(--primary-hover);
}

.report-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
}

.report-btn:hover {
    background: var(--bg);
    border-color: var(--primary);
}

.card-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.card-title {
    font-weight: 600;
    font-size: 1rem;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
}

.card-actions button {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 4px;
}

.card-actions button:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.card-actions button.delete:hover {
    color: var(--danger);
    border-color: var(--danger);
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-draft { background: var(--border); color: var(--text-muted); }
.badge-testing { background: var(--warning); color: #000; }
.badge-approved { background: var(--success); color: #000; }
.badge-archived { background: var(--border); color: var(--text-muted); }

.attrs-list {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.attr-tag {
    display: inline-block;
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin: 0.125rem;
}

.attr-key {
    color: var(--text-muted);
}

.attr-value {
    color: var(--primary);
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: 200;
}

@media (min-width: 640px) {
    .modal {
        align-items: center;
    }
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px 12px 0 0;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

@media (min-width: 640px) {
    .modal-content {
        max-width: 500px;
        border-radius: 12px;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.close-btn:hover {
    color: var(--text);
}

#modal-form {
    padding: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    color: var(--text);
    font-size: 16px; /* Prevents iOS zoom on focus */
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.attrs-editor {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem;
}

.attr-row {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.attr-row input {
    flex: 1;
    font-size: 16px;
}

.attr-row button {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--danger);
    border-radius: 4px;
    cursor: pointer;
    padding: 0 0.5rem;
}

.add-attr-btn {
    background: transparent;
    border: 1px dashed var(--border);
    color: var(--text-muted);
    width: 100%;
    padding: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
}

.add-attr-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    padding-top: 0.5rem;
}

.form-actions button {
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
}

.form-actions button:first-child {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.form-actions button.primary {
    background: var(--primary);
    border: none;
    color: #fff;
}

.form-actions button.primary:hover {
    background: var(--primary-hover);
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-state p {
    font-size: 0.875rem;
}

/* Loading */
.loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

/* Image upload */
.image-upload {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s;
}

.image-upload:hover {
    border-color: var(--primary);
}

.image-upload.has-image {
    padding: 0.5rem;
}

.image-upload input {
    display: none;
}

.image-upload img {
    max-width: 100%;
    max-height: 150px;
    border-radius: 4px;
}

.image-upload .placeholder {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.image-upload .placeholder::before {
    content: '';
}

.card-image {
    width: 60px;
    height: 60px;
    border-radius: 6px;
    object-fit: cover;
    margin-right: 1rem;
    flex-shrink: 0;
}

.card-with-image {
    display: flex;
    align-items: flex-start;
}

.card-content {
    flex: 1;
    min-width: 0;
}

.remove-image {
    background: var(--danger);
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    cursor: pointer;
    margin-top: 0.5rem;
}

/* Relations */
.relations {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.relations-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-right: 0.5rem;
}

.relation-tag {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin: 0.125rem;
    cursor: pointer;
    transition: opacity 0.15s;
}

.relation-tag:hover {
    opacity: 0.8;
}

/* Parts editor */
.parts-editor {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem;
}

.part-row {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    align-items: center;
}

.part-row select {
    flex: 1;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.4rem;
    color: var(--text);
    font-size: 16px;
}

.part-row input {
    width: 60px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.4rem;
    color: var(--text);
    font-size: 16px;
    text-align: center;
}

.part-row button {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--danger);
    border-radius: 4px;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    font-size: 1rem;
}

.add-part-btn {
    background: transparent;
    border: 1px dashed var(--border);
    color: var(--text-muted);
    width: 100%;
    padding: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
}

.add-part-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Prototype template fields */
.template-fields {
    margin-top: 0.5rem;
}

.fields-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-right: 0.5rem;
}

.field-tag {
    display: inline-block;
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin: 0.125rem;
    color: var(--text);
}

/* Fields editor */
.fields-editor {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem;
}

.field-row {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.field-row input[type="text"],
.field-row input[type="number"] {
    flex: 1;
    min-width: 80px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.4rem;
    color: var(--text);
    font-size: 14px;
}

.field-row select {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.4rem;
    color: var(--text);
    font-size: 14px;
}

.field-row .field-options-input {
    flex: 1;
    min-width: 100px;
}

.field-required {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.25rem;
    white-space: nowrap;
}

.field-row button {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--danger);
    border-radius: 4px;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
}

.add-field-btn {
    background: transparent;
    border: 1px dashed var(--border);
    color: var(--text-muted);
    width: 100%;
    padding: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
}

.add-field-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

@media (max-width: 500px) {
    .field-row {
        flex-direction: column;
        align-items: stretch;
    }
    .field-row input,
    .field-row select {
        width: 100%;
    }
}