/* ================================================================
   MOLDWISE — Main Stylesheet
   Uses tokens from design-system.css
   ================================================================ */

/* ================================================================
   1. Layout
   ================================================================ */
.main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-xl);
    min-height: calc(100vh - var(--header-height) - 80px);
}

.container    { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-xl); }
.section      { margin-bottom: var(--space-3xl); }
.grid-2       { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.grid-3       { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

/* ================================================================
   2. Header
   ================================================================ */
.site-header {
    height: var(--header-height);
    border-bottom: 1px solid var(--border);
    background: var(--white);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.wordmark {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: 0.15em;
    color: var(--black);
    text-decoration: none;
}

.header-nav {
    display: flex;
    gap: var(--space-lg);
}

.header-nav a {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--mid);
    text-decoration: none;
    transition: color var(--transition);
}

.header-nav a:hover { color: var(--black); }

/* ================================================================
   3. Buttons
   ================================================================ */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #fff;
    background: var(--accent);
    border: 1px solid var(--accent);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--black);
    background: var(--white);
    border: 1px solid var(--border);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
}

.btn-secondary:hover {
    border-color: var(--black);
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.75rem;
}

/* ================================================================
   4. Cards
   ================================================================ */
.card {
    border: 1px solid var(--border);
    padding: var(--space-lg);
    background: var(--white);
    transition: border-color var(--transition);
}

.card:hover { border-color: var(--mid); }
.card-header { margin-bottom: var(--space-md); }
.card-title  { font-size: 1rem; font-weight: 600; }
.card-meta   { font-family: var(--font-mono); font-size: 0.75rem; color: var(--light); }

/* ================================================================
   5. Tables
   ================================================================ */
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

th {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--mid);
    text-align: left;
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--border);
}

td {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--surface);
}

/* ================================================================
   6. Status Badges
   ================================================================ */
.badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 2px var(--space-sm);
    border: 1px solid currentColor;
}

.badge-pass { color: var(--pass); }
.badge-warn { color: var(--warn); }
.badge-fail { color: var(--fail); }
.badge-info { color: var(--info); }
.badge-idle { color: var(--light); }

/* ================================================================
   7. Forms
   ================================================================ */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--mid);
    margin-bottom: var(--space-xs);
}

.form-input, .form-select {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--black);
    outline: none;
    transition: border-color var(--transition);
}

.form-input:focus, .form-select:focus {
    border-color: var(--black);
}

/* ================================================================
   8. Alerts
   ================================================================ */
.alert {
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--border);
    margin-bottom: var(--space-lg);
    font-size: 0.875rem;
}

.alert-error   { border-color: var(--fail); color: var(--fail); }
.alert-warning { border-color: var(--warn); color: var(--warn); }
.alert-success { border-color: var(--pass); color: var(--pass); }
.alert-info    { border-color: var(--info); }

/* ================================================================
   9. Footer
   ================================================================ */
.site-footer {
    border-top: 1px solid var(--border);
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
}

/* ================================================================
   10. Upload Zone
   ================================================================ */
.upload-zone {
    border: 2px dashed var(--border);
    padding: var(--space-3xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--black);
    background: var(--surface);
}

.upload-icon {
    font-size: 2rem;
    color: var(--light);
    margin-bottom: var(--space-md);
}

/* ================================================================
   11. Mode Toggle
   ================================================================ */
.mode-toggle {
    display: flex;
    border: 1px solid var(--border);
}

.mode-option {
    flex: 1;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    text-align: center;
    cursor: pointer;
    border: none;
    background: var(--white);
    color: var(--mid);
    transition: all var(--transition);
}

.mode-option.active {
    background: var(--black);
    color: var(--white);
}

.mode-option:not(.active):hover {
    background: var(--surface);
    color: var(--black);
}

/* ================================================================
   12. Utilities
   ================================================================ */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.hidden { display: none; }

/* ================================================================
   Responsive
   ================================================================ */

/* Tablet */
@media (max-width: 1024px) {
    .workspace {
        flex-direction: column;
    }
    .viewer-panel {
        flex: 0 0 60vh;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .side-panel {
        flex: 1;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .main-content { padding: var(--space-md); }
    .header-nav { gap: var(--space-md); }
    .viewer-toolbar { flex-wrap: wrap; }
    .workflow-stepper {
        overflow-x: auto;
        justify-content: flex-start;
        padding: var(--space-sm);
    }
}

/* Print */
@media print {
    .site-header, .header, .site-footer, .footer, .header-nav { display: none; }
    .viewer-toolbar, .workflow-stepper { display: none; }
    .chat-input-area, #checkpoint-panel { display: none; }
    .workspace { display: block; }
    .viewer-panel { border: none; }
    .side-panel { break-inside: avoid; }
    body { color: #000; background: #fff; }
    .badge { border: 1px solid #000; }
    table { page-break-inside: avoid; }
    .bom-table th, .bom-table td { border: 1px solid #000; }
}

/* ================================================================
   13. Workspace Layout (70/30 split)
   ================================================================ */
.workspace-main {
    padding: 0;
    display: flex;
    flex-direction: column;
    height: calc(100vh - var(--header-height));
    overflow: hidden;
}

.workspace {
    display: flex;
    flex: 1;
    min-height: 0; /* allow flex children to shrink */
}

.viewer-panel {
    flex: 0 0 var(--viewer-width);
    position: relative;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.viewer-container {
    flex: 1;
    background: var(--white);
    position: relative;
}

.viewer-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
}

.viewer-toolbar {
    display: flex;
    gap: var(--space-xs);
    padding: 4px var(--space-sm);
    border-top: 1px solid var(--border);
    background: var(--white);
    flex-shrink: 0;
    flex-wrap: wrap;
    align-items: center;
}

.viewer-toolbar button {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--border);
    background: var(--white);
    cursor: pointer;
    transition: background var(--transition);
}

.viewer-toolbar button:hover {
    background: var(--surface);
}

.toolbar-sep {
    width: 1px;
    background: var(--border);
    margin: 0 var(--space-xs);
}

.side-panel {
    flex: 1;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

/* ================================================================
   14. Tab Panel
   ================================================================ */
.tab-headers {
    display: flex;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: var(--white);
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--light);
    cursor: pointer;
    transition: all var(--transition);
}

.tab-btn.active {
    color: var(--black);
    border-bottom-color: var(--black);
}

.tab-btn:hover {
    color: var(--mid);
}

.tab-content {
    display: none;
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
}

.tab-content.active {
    display: flex;
    flex-direction: column;
}

/* Chat */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.chat-msg {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border);
}

.chat-msg-system { background: var(--surface); }
.chat-msg-user { border-left: 2px solid var(--black); }
.chat-msg-assistant { border-left: 2px solid var(--subtle, #e0e0e0); }
.chat-msg-typing p { color: var(--light, #8a8a8a); }
.chat-msg .label { display: block; margin-bottom: var(--space-xs); }
.chat-msg p { font-size: 0.875rem; line-height: 1.5; }

.chat-input-area {
    display: flex;
    gap: var(--space-xs);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--border);
}

.chat-input {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-size: 0.875rem;
    border: 1px solid var(--border);
    background: var(--white);
    outline: none;
}

.chat-input:focus { border-color: var(--black); }

/* Params */
.params-section { margin-bottom: var(--space-lg); }
.params-section h3 { margin-bottom: var(--space-sm); }

.data-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-xs) var(--space-md);
    font-size: 0.875rem;
}

/* Log */
.log-entries {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.log-entry {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-xs) 0;
    font-size: 0.8125rem;
    border-bottom: 1px solid var(--surface);
}

/* Checkpoint */
.checkpoint-panel {
    padding: var(--space-lg);
    background: var(--surface);
    border-top: 1px solid var(--border);
}

.checkpoint-panel h3 { margin-bottom: var(--space-sm); }

.checkpoint-panel .btn-primary,
.checkpoint-panel .btn-secondary {
    display: inline-block;
    margin-top: var(--space-sm);
}

/* Parting line variant cards */
.variant-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-sm);
    margin: var(--space-md) 0;
}

.variant-card {
    border: 1px solid var(--border);
    padding: var(--space-sm);
    cursor: pointer;
    text-align: center;
    transition: border-color 0.15s ease;
}

.variant-card:hover { border-color: var(--mid); }

.variant-card.selected {
    border-color: var(--black);
    border-width: 2px;
}

.variant-card .mono { display: block; margin: var(--space-xs) 0; }
.variant-card p { font-size: 0.8rem; }

/* ================================================================
   15. Workflow Stepper
   ================================================================ */
.workflow-stepper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 4px var(--space-md);
    border-top: 1px solid var(--border);
    background: var(--white);
    height: 36px;
    flex-shrink: 0;
}

.step {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.step-dot {
    font-size: 0.75rem;
    color: var(--subtle);
}

.step-label {
    font-size: 0.625rem;
}

.step.active .step-dot { color: var(--black); }
.step.active .step-label { color: var(--black); }
.step.completed .step-dot { color: var(--pass); }
.step.completed .step-label { color: var(--mid); }

.step-line {
    width: 24px;
    height: 1px;
    background: var(--border);
    margin: 0 var(--space-xs);
}

/* ================================================================
   16. Breadcrumb
   ================================================================ */
.breadcrumb {
    padding: 2px var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--light);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.breadcrumb a {
    color: var(--light);
    text-decoration: none;
}

.breadcrumb a:hover { color: var(--black); }
.breadcrumb-sep { margin: 0 var(--space-xs); }
.breadcrumb-current { color: var(--black); }

/* ================================================================
   17. Loading States
   ================================================================ */
@keyframes skeleton-pulse {
    0%   { opacity: 0.6; }
    50%  { opacity: 0.3; }
    100% { opacity: 0.6; }
}

.skeleton {
    background: var(--surface);
    animation: skeleton-pulse 1.5s ease-in-out infinite;
}

/* Calc status grid (for project detail page) */
.calc-status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-sm);
}

.calc-status-grid .badge {
    display: block;
    text-align: center;
    padding: var(--space-xs) var(--space-sm);
}

.calc-status-icon {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: var(--space-xs);
}

.calc-status-icon.pass { background: var(--pass); }
.calc-status-icon.fail { background: var(--fail); }
.calc-status-icon.skip { background: var(--light); }

/* ================================================================
   18. Kinematics Tab
   ================================================================ */
.kin-phase-card {
    display: flex;
    gap: var(--space-md);
    align-items: center;
    padding: var(--space-xs) 0;
    border-bottom: 1px solid var(--surface);
    font-size: 0.875rem;
}

.kin-phase-card .label { min-width: 140px; }

/* ================================================================
   19. Assembly Tree
   ================================================================ */
.assembly-controls {
    display: flex;
    gap: var(--space-xs);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    align-items: center;
}

.assembly-tree {
    flex: 1;
    overflow-y: auto;
    font-size: 0.8125rem;
}

.tree-group {
    margin-bottom: var(--space-xs);
}

.tree-group-header {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 2px 0;
    cursor: pointer;
    font-weight: 600;
}

.tree-group-header input[type="checkbox"] {
    margin: 0;
    cursor: pointer;
}

.tree-group-items {
    padding-left: var(--space-md);
}

.tree-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 1px 0;
    cursor: pointer;
    border-radius: 2px;
}

.tree-item:hover {
    background: var(--surface);
}

.tree-item.selected {
    background: var(--surface);
    border-left: 2px solid var(--black);
    padding-left: 2px;
}

.tree-item input[type="checkbox"] {
    margin: 0;
    cursor: pointer;
    flex-shrink: 0;
}

.tree-item-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.75rem;
}

.tree-item-size {
    font-size: 0.625rem;
    color: var(--light);
    flex-shrink: 0;
}