/**
 * PicSim Dashboard Styles
 */

/* ==========================================================================
   VARIABLES
   ========================================================================== */

.picsim-dashboard,
.picsim-editor,
.picsim-wizard-overlay {
    /* Palette moderna - slate luminoso */
    --picsim-bg: #1e293b;
    --picsim-bg-secondary: #334155;
    --picsim-bg-tertiary: #475569;
    --picsim-bg-hover: #64748b;
    --picsim-border: #64748b;
    --picsim-border-light: #94a3b8;
    
    /* Testo leggibile */
    --picsim-text: #f1f5f9;
    --picsim-text-secondary: #cbd5e1;
    --picsim-text-dim: #94a3b8;
    
    /* Accenti vivaci */
    --picsim-primary: #38bdf8;
    --picsim-primary-hover: #0ea5e9;
    --picsim-primary-bg: rgba(56, 189, 248, 0.15);
    
    /* Feedback - colori allegri */
    --picsim-success: #4ade80;
    --picsim-warning: #fbbf24;
    --picsim-error: #f87171;
    
    /* UI */
    --picsim-radius: 8px;
    --picsim-radius-lg: 12px;
    --picsim-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    
    --picsim-font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --picsim-font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, 'DejaVu Sans Mono', monospace;
}

/* ==========================================================================
   BASE
   ========================================================================== */

.picsim-dashboard {
    font-family: var(--picsim-font);
    background: var(--picsim-bg);
    color: var(--picsim-text);
    min-height: 100vh;
}

.picsim-dashboard *, 
.picsim-editor *,
.picsim-wizard * {
    box-sizing: border-box;
}

/* ==========================================================================
   HEADER
   ========================================================================== */

.picsim-dash-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--picsim-bg-secondary);
    border-bottom: 1px solid var(--picsim-border);
}

.picsim-dash-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.picsim-dash-logo svg {
    color: var(--picsim-primary);
}

.picsim-dash-logo h1 {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
    color: var(--picsim-text);
}

.picsim-dash-subtitle {
    font-size: 11px;
    color: var(--picsim-text-secondary);
}

.picsim-dash-nav {
    display: flex;
    gap: 4px;
}

.picsim-nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: transparent;
    border: none;
    border-radius: var(--picsim-radius);
    color: var(--picsim-text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.picsim-nav-btn:hover {
    background: var(--picsim-bg-hover);
    color: var(--picsim-text);
}

.picsim-nav-btn.active {
    background: var(--picsim-primary-bg);
    color: var(--picsim-primary);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.picsim-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--picsim-bg-tertiary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
    color: var(--picsim-text);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.picsim-btn:hover {
    background: var(--picsim-bg-hover);
    border-color: var(--picsim-border-light);
}

.picsim-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.picsim-btn-primary {
    background: var(--picsim-primary);
    border-color: var(--picsim-primary);
    color: #000;
}

.picsim-btn-primary:hover {
    background: var(--picsim-primary-hover);
}

.picsim-btn-icon {
    padding: 8px;
    background: transparent;
    border: none;
}

.picsim-btn-icon:hover {
    background: var(--picsim-bg-hover);
}

/* ==========================================================================
   FORMS
   ========================================================================== */

.picsim-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.picsim-form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.picsim-form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--picsim-text-secondary);
}

.picsim-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.picsim-form input,
.picsim-form textarea,
.picsim-form select,
.picsim-select {
    padding: 10px 12px;
    background: var(--picsim-bg);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
    color: var(--picsim-text);
    font-size: 14px;
    font-family: inherit;
}

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

.picsim-form-hint {
    font-size: 11px;
    color: var(--picsim-text-dim);
}

/* ==========================================================================
   TOOLBAR
   ========================================================================== */

.picsim-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--picsim-border);
}

.picsim-toolbar-left,
.picsim-toolbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.picsim-toolbar h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.picsim-search {
    position: relative;
    display: flex;
    align-items: center;
}

.picsim-search svg {
    position: absolute;
    left: 10px;
    color: var(--picsim-text-dim);
}

.picsim-search input {
    padding: 8px 12px 8px 34px;
    width: 240px;
    background: var(--picsim-bg-tertiary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
    color: var(--picsim-text);
    font-size: 13px;
}

.picsim-view-toggle {
    display: flex;
    background: var(--picsim-bg-tertiary);
    border-radius: var(--picsim-radius);
    overflow: hidden;
}

.picsim-view-btn {
    padding: 6px 10px;
    background: transparent;
    border: none;
    color: var(--picsim-text-secondary);
    cursor: pointer;
}

.picsim-view-btn.active {
    background: var(--picsim-primary-bg);
    color: var(--picsim-primary);
}

/* ==========================================================================
   PROJECTS GRID
   ========================================================================== */

.picsim-projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    padding: 24px;
}

.picsim-projects-grid.list-view {
    grid-template-columns: 1fr;
}

.picsim-project-card {
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius-lg);
    padding: 16px;
    cursor: pointer;
    transition: all 0.2s;
}

.picsim-project-card:hover {
    border-color: var(--picsim-border-light);
    transform: translateY(-2px);
    box-shadow: var(--picsim-shadow);
}

.picsim-project-card.locked {
    opacity: 0.8;
}

.picsim-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.picsim-card-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--picsim-primary-bg);
    border-radius: var(--picsim-radius);
    color: var(--picsim-primary);
}

.picsim-card-icon.submission { background: rgba(59, 185, 80, 0.1); color: var(--picsim-success); }
.picsim-card-icon.template { background: rgba(210, 153, 34, 0.1); color: var(--picsim-warning); }

.picsim-card-actions {
    position: relative;
}

.picsim-card-menu-btn {
    padding: 4px;
    background: transparent;
    border: none;
    border-radius: 4px;
    color: var(--picsim-text-secondary);
    cursor: pointer;
}

.picsim-card-menu-btn:hover {
    background: var(--picsim-bg-hover);
}

.picsim-card-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
    padding: 4px 0;
    min-width: 140px;
    z-index: 100;
    display: none;
    box-shadow: var(--picsim-shadow);
}

.picsim-card-menu.open {
    display: block;
}

.picsim-card-menu button {
    display: block;
    width: 100%;
    padding: 8px 12px;
    background: transparent;
    border: none;
    color: var(--picsim-text);
    font-size: 13px;
    text-align: left;
    cursor: pointer;
}

.picsim-card-menu button:hover {
    background: var(--picsim-bg-hover);
}

.picsim-card-menu button.danger {
    color: var(--picsim-error);
}

.picsim-card-menu hr {
    margin: 4px 0;
    border: none;
    border-top: 1px solid var(--picsim-border);
}

.picsim-card-body {
    margin-bottom: 12px;
}

.picsim-card-title {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0 0 4px;
    font-size: 15px;
    font-weight: 600;
}

.picsim-card-title svg {
    color: var(--picsim-warning);
}

.picsim-card-desc {
    margin: 0;
    font-size: 13px;
    color: var(--picsim-text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.picsim-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.picsim-card-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--picsim-text-dim);
}

.picsim-card-device {
    background: var(--picsim-bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
}

/* ==========================================================================
   BADGES
   ========================================================================== */

.picsim-badge {
    display: inline-flex;
    padding: 3px 8px;
    font-size: 11px;
    font-weight: 500;
    border-radius: 4px;
    background: var(--picsim-bg-tertiary);
    color: var(--picsim-text-secondary);
}

.picsim-badge.active, .picsim-badge.published { background: rgba(59, 185, 80, 0.15); color: var(--picsim-success); }
.picsim-badge.draft { background: rgba(139, 148, 158, 0.15); color: var(--picsim-text-secondary); }
.picsim-badge.submitted { background: rgba(0, 212, 255, 0.15); color: var(--picsim-primary); }
.picsim-badge.graded { background: rgba(210, 153, 34, 0.15); color: var(--picsim-warning); }

/* ==========================================================================
   EMPTY STATE
   ========================================================================== */

.picsim-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 24px;
    text-align: center;
}

.picsim-empty svg {
    color: var(--picsim-text-dim);
    margin-bottom: 16px;
}

.picsim-empty h3 {
    margin: 0 0 8px;
    font-size: 18px;
    color: var(--picsim-text);
}

.picsim-empty p {
    margin: 0 0 16px;
    color: var(--picsim-text-secondary);
}

/* ==========================================================================
   WIZARD
   ========================================================================== */

.picsim-wizard-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.2s;
}

.picsim-wizard-overlay.visible {
    opacity: 1;
}

.picsim-wizard-overlay.closing {
    opacity: 0;
}

.picsim-wizard {
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius-lg);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--picsim-shadow);
}

.picsim-wizard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--picsim-border);
}

.picsim-wizard-header h2 {
    margin: 0;
    font-size: 18px;
}

.picsim-wizard-close {
    background: transparent;
    border: none;
    font-size: 24px;
    color: var(--picsim-text-secondary);
    cursor: pointer;
    line-height: 1;
}

.picsim-wizard-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    gap: 8px;
}

.picsim-step {
    display: flex;
    align-items: center;
    gap: 8px;
}

.picsim-step .step-num {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--picsim-bg-tertiary);
    border-radius: 50%;
    font-size: 13px;
    font-weight: 600;
}

.picsim-step .step-label {
    font-size: 13px;
    color: var(--picsim-text-secondary);
}

.picsim-step.active .step-num {
    background: var(--picsim-primary);
    color: #000;
}

.picsim-step.active .step-label {
    color: var(--picsim-text);
}

.picsim-step.completed .step-num {
    background: var(--picsim-success);
    color: #fff;
}

.picsim-step-line {
    width: 40px;
    height: 2px;
    background: var(--picsim-border);
}

.picsim-wizard-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.picsim-wizard-footer {
    display: flex;
    justify-content: space-between;
    padding: 16px 20px;
    border-top: 1px solid var(--picsim-border);
}

/* Device Grid */
.picsim-device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.picsim-device-card {
    padding: 16px;
    background: var(--picsim-bg);
    border: 2px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
    cursor: pointer;
    transition: all 0.2s;
}

.picsim-device-card:hover {
    border-color: var(--picsim-border-light);
}

.picsim-device-card.selected {
    border-color: var(--picsim-primary);
    background: var(--picsim-primary-bg);
}

.picsim-device-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.picsim-device-card h4 {
    margin: 0 0 4px;
    font-size: 15px;
}

.picsim-device-card p {
    margin: 0;
    font-size: 12px;
    color: var(--picsim-text-secondary);
}

.picsim-device-difficulty {
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
    background: var(--picsim-bg-tertiary);
}

.picsim-device-difficulty.principiante { color: var(--picsim-success); }
.picsim-device-difficulty.intermedio { color: var(--picsim-warning); }
.picsim-device-difficulty.avanzato { color: var(--picsim-error); }

.picsim-device-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
    font-size: 11px;
    color: var(--picsim-text-dim);
}

.picsim-feature-tag {
    padding: 2px 6px;
    background: var(--picsim-bg-tertiary);
    border-radius: 4px;
    font-size: 10px;
}

/* Template Grid */
.picsim-template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
}

.picsim-template-card {
    padding: 16px;
    text-align: center;
    background: var(--picsim-bg);
    border: 2px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
    cursor: pointer;
    transition: all 0.2s;
}

.picsim-template-card:hover {
    border-color: var(--picsim-border-light);
}

.picsim-template-card.selected {
    border-color: var(--picsim-primary);
    background: var(--picsim-primary-bg);
}

.picsim-template-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--picsim-bg-tertiary);
    border-radius: var(--picsim-radius);
    color: var(--picsim-primary);
}

.picsim-template-card h4 {
    margin: 0 0 4px;
    font-size: 14px;
}

.picsim-template-card p {
    margin: 0;
    font-size: 12px;
    color: var(--picsim-text-secondary);
}

/* Summary */
.picsim-wizard-summary {
    margin-top: 24px;
    padding: 16px;
    background: var(--picsim-bg);
    border-radius: var(--picsim-radius);
}

.picsim-wizard-summary h4 {
    margin: 0 0 12px;
    font-size: 13px;
    color: var(--picsim-text-secondary);
}

.picsim-summary-item {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 13px;
}

/* ==========================================================================
   EDITOR
   ========================================================================== */

.picsim-editor {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: var(--picsim-bg);
}

.picsim-editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: var(--picsim-bg-secondary);
    border-bottom: 1px solid var(--picsim-border);
}

.picsim-editor-nav {
    display: flex;
    align-items: center;
    gap: 12px;
}

.picsim-editor-title h2 {
    margin: 0;
    font-size: 16px;
}

.picsim-editor-device {
    font-size: 11px;
    color: var(--picsim-primary);
}

.picsim-editor-actions {
    display: flex;
    gap: 8px;
}

.picsim-editor-main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.picsim-editor-sidebar {
    width: 240px;
    background: var(--picsim-bg-secondary);
    border-right: 1px solid var(--picsim-border);
    display: flex;
    flex-direction: column;
}

.picsim-sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--picsim-text-secondary);
    text-transform: uppercase;
}

.picsim-file-list {
    flex: 1;
    overflow-y: auto;
}

.picsim-file-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    cursor: pointer;
    transition: background 0.2s;
}

.picsim-file-item:hover {
    background: var(--picsim-bg-hover);
}

.picsim-file-item.active {
    background: var(--picsim-primary-bg);
}

.picsim-file-item svg {
    color: var(--picsim-text-secondary);
    flex-shrink: 0;
}

.picsim-file-name {
    flex: 1;
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.picsim-file-badge {
    font-size: 10px;
    padding: 1px 5px;
    border-radius: 3px;
}

.picsim-file-badge.main {
    background: var(--picsim-primary-bg);
    color: var(--picsim-primary);
}

.picsim-file-badge.modified {
    color: var(--picsim-warning);
    font-size: 14px;
}

.picsim-sidebar-section {
    padding: 12px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--picsim-text-secondary);
    text-transform: uppercase;
    border-top: 1px solid var(--picsim-border);
}

.picsim-project-info {
    padding: 0 16px 16px;
}

.picsim-info-item {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 12px;
    color: var(--picsim-text-secondary);
}

.picsim-info-item strong {
    color: var(--picsim-text);
}

/* Editor Area */
.picsim-editor-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.picsim-tabs {
    display: flex;
    background: var(--picsim-bg-secondary);
    border-bottom: 1px solid var(--picsim-border);
    overflow-x: auto;
}

.picsim-tabs-empty {
    padding: 10px 16px;
    font-size: 12px;
    color: var(--picsim-text-dim);
}

.picsim-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: transparent;
    border-right: 1px solid var(--picsim-border);
    font-size: 13px;
    color: var(--picsim-text-secondary);
    cursor: pointer;
}

.picsim-tab:hover {
    background: var(--picsim-bg-hover);
}

.picsim-tab.active {
    background: var(--picsim-bg);
    color: var(--picsim-text);
}

.picsim-tab-modified {
    color: var(--picsim-warning);
}

.picsim-tab-close {
    padding: 2px 4px;
    background: transparent;
    border: none;
    color: var(--picsim-text-dim);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    border-radius: 3px;
}

.picsim-tab-close:hover {
    background: var(--picsim-bg-hover);
    color: var(--picsim-text);
}

/* Code Area */
.picsim-code-area {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.picsim-code-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--picsim-text-dim);
}

.picsim-code-editor {
    display: flex;
    height: 100%;
}

.picsim-code-editor #line-numbers {
    padding: 10px 8px;
    background: var(--picsim-bg-secondary);
    font-family: var(--picsim-font-mono);
    font-size: 13px;
    line-height: 1.5;
    color: var(--picsim-text-dim);
    text-align: right;
    user-select: none;
    overflow: hidden;
    white-space: pre;
}

.picsim-code-editor #code-editor {
    flex: 1;
    padding: 10px;
    background: var(--picsim-bg);
    border: none;
    font-family: var(--picsim-font-mono);
    font-size: 13px;
    line-height: 1.5;
    color: var(--picsim-text);
    resize: none;
    outline: none;
}

.picsim-statusbar {
    display: flex;
    justify-content: space-between;
    padding: 4px 12px;
    background: var(--picsim-bg-secondary);
    border-top: 1px solid var(--picsim-border);
    font-size: 11px;
    color: var(--picsim-text-dim);
}

.picsim-statusbar-left,
.picsim-statusbar-right {
    display: flex;
    gap: 16px;
}

#status-modified {
    color: var(--picsim-warning);
}

.hidden {
    display: none !important;
}

/* ==========================================================================
   MODAL
   ========================================================================== */

.picsim-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.2s;
}

.picsim-modal-overlay.visible {
    opacity: 1;
}

.picsim-modal {
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius-lg);
    width: 90%;
    max-width: 480px;
    box-shadow: var(--picsim-shadow);
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.picsim-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--picsim-border);
    flex-shrink: 0;
}

.picsim-modal-header h3 {
    margin: 0;
    font-size: 16px;
}

.picsim-modal-close {
    background: transparent;
    border: none;
    font-size: 24px;
    color: var(--picsim-text-secondary);
    cursor: pointer;
}

.picsim-modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.picsim-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 20px;
    border-top: 1px solid var(--picsim-border);
    flex-shrink: 0;
}

/* Fix form inputs inside modals */
.picsim-modal .picsim-form input,
.picsim-modal .picsim-form textarea,
.picsim-modal .picsim-form select {
    width: 100%;
    box-sizing: border-box;
}

.picsim-modal .picsim-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

@media (max-width: 500px) {
    .picsim-modal .picsim-form-row {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   TOAST
   ========================================================================== */

.picsim-toasts {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.picsim-toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
    box-shadow: var(--picsim-shadow);
    opacity: 0;
    transform: translateX(20px);
    transition: all 0.2s;
}

.picsim-toast.visible {
    opacity: 1;
    transform: translateX(0);
}

.picsim-toast.closing {
    opacity: 0;
    transform: translateX(20px);
}

.picsim-toast-success { border-left: 3px solid var(--picsim-success); }
.picsim-toast-error { border-left: 3px solid var(--picsim-error); }
.picsim-toast-warning { border-left: 3px solid var(--picsim-warning); }

.picsim-toast-close {
    background: transparent;
    border: none;
    color: var(--picsim-text-dim);
    cursor: pointer;
    font-size: 18px;
}

/* ==========================================================================
   CONTEXT MENU
   ========================================================================== */

.picsim-context-menu {
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
    padding: 4px 0;
    min-width: 140px;
    z-index: 1001;
    box-shadow: var(--picsim-shadow);
}

.picsim-context-menu button {
    display: block;
    width: 100%;
    padding: 8px 12px;
    background: transparent;
    border: none;
    color: var(--picsim-text);
    font-size: 13px;
    text-align: left;
    cursor: pointer;
}

.picsim-context-menu button:hover {
    background: var(--picsim-bg-hover);
}

.picsim-context-menu button.danger {
    color: var(--picsim-error);
}

.picsim-context-menu hr {
    margin: 4px 0;
    border: none;
    border-top: 1px solid var(--picsim-border);
}

/* ==========================================================================
   LOADING / SPINNER
   ========================================================================== */

.picsim-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    gap: 12px;
    color: var(--picsim-text-secondary);
}

.picsim-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--picsim-border);
    border-top-color: var(--picsim-primary);
    border-radius: 50%;
    animation: picsim-spin 0.8s linear infinite;
}

.picsim-spinner.small {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

@keyframes picsim-spin {
    to { transform: rotate(360deg); }
}

/* ==========================================================================
   CLASSES
   ========================================================================== */

.picsim-classes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
    padding: 24px;
}

.picsim-class-card {
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius-lg);
    padding: 16px;
    cursor: pointer;
    transition: all 0.2s;
}

.picsim-class-card:hover {
    border-color: var(--picsim-border-light);
    transform: translateY(-2px);
}

.picsim-class-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
}

.picsim-class-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--picsim-primary-bg);
    border-radius: var(--picsim-radius);
    color: var(--picsim-primary);
}

.picsim-class-body h4 {
    margin: 0 0 4px;
    font-size: 16px;
}

.picsim-class-info {
    font-size: 12px;
    color: var(--picsim-text-secondary);
}

.picsim-class-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--picsim-border);
}

.picsim-class-stats {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--picsim-text-secondary);
}

.picsim-class-stats span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.picsim-class-code {
    display: flex;
    align-items: center;
    gap: 4px;
}

.picsim-class-code code {
    padding: 2px 8px;
    background: var(--picsim-bg);
    border-radius: 4px;
    font-family: var(--picsim-font-mono);
    font-size: 12px;
}

/* Class Detail */
.picsim-detail-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--picsim-border);
}

.picsim-detail-title h2 {
    margin: 0;
    font-size: 20px;
}

.picsim-detail-title span {
    font-size: 13px;
    color: var(--picsim-text-secondary);
}

.picsim-detail-actions {
    margin-left: auto;
}

.picsim-detail-grid {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 24px;
    padding: 24px;
}

.picsim-info-card {
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
    padding: 16px;
    margin-bottom: 16px;
}

.picsim-info-card h4 {
    margin: 0 0 12px;
    font-size: 13px;
    color: var(--picsim-text-secondary);
    text-transform: uppercase;
}

.picsim-join-code {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.picsim-join-code code {
    flex: 1;
    padding: 10px;
    background: var(--picsim-bg);
    border-radius: var(--picsim-radius);
    font-family: var(--picsim-font-mono);
    font-size: 18px;
    text-align: center;
    letter-spacing: 2px;
}

.picsim-hint {
    font-size: 12px;
    color: var(--picsim-text-dim);
}

/* Students */
.picsim-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.picsim-section-header h4 {
    margin: 0;
    font-size: 14px;
}

.picsim-students-list {
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
}

.picsim-student-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--picsim-border);
    flex-wrap: wrap;
}

.picsim-student-item:last-child {
    border-bottom: none;
}

.picsim-student-avatar {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--picsim-primary-bg);
    border-radius: 50%;
    font-size: 12px;
    font-weight: 600;
    color: var(--picsim-primary);
    flex-shrink: 0;
}

.picsim-student-info {
    flex: 1;
    min-width: 150px;
}

.picsim-student-name {
    display: block;
    font-weight: 500;
}

.picsim-student-email {
    font-size: 12px;
    color: var(--picsim-text-secondary);
}

.picsim-student-status {
    flex-shrink: 0;
}

.picsim-student-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.picsim-student-actions button {
    padding: 4px 10px;
    background: var(--picsim-bg-tertiary);
    border: 1px solid var(--picsim-border);
    border-radius: 4px;
    font-size: 12px;
    color: var(--picsim-text);
    cursor: pointer;
    white-space: nowrap;
}

.picsim-student-actions button:hover {
    background: var(--picsim-bg-hover);
}

.picsim-student-actions button.danger {
    color: var(--picsim-error);
}

/* ==========================================================================
   ASSIGNMENTS
   ========================================================================== */

.picsim-assignments-list {
    padding: 16px 24px;
}

.picsim-assignment-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.picsim-assignment-item:hover {
    border-color: var(--picsim-border-light);
}

.picsim-assignment-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--picsim-bg-tertiary);
    border-radius: var(--picsim-radius);
    color: var(--picsim-text-secondary);
}

.picsim-assignment-content {
    flex: 1;
}

.picsim-assignment-content h4 {
    margin: 0 0 4px;
    font-size: 15px;
}

.picsim-assignment-meta {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--picsim-text-secondary);
}

.picsim-assignment-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.picsim-assignment-date.overdue {
    color: var(--picsim-error);
}

.picsim-assignment-status {
    margin-right: 8px;
}

.picsim-assignment-actions {
    display: flex;
    gap: 8px;
}

/* Submissions */
.picsim-submissions-list {
    background: var(--picsim-bg-secondary);
    border: 1px solid var(--picsim-border);
    border-radius: var(--picsim-radius);
}

.picsim-submission-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--picsim-border);
}

.picsim-submission-item:last-child {
    border-bottom: none;
}

.picsim-submission-info {
    flex: 1;
}

.picsim-submission-date {
    display: block;
    font-size: 12px;
    color: var(--picsim-text-secondary);
}

.picsim-submission-grade {
    min-width: 80px;
    text-align: center;
}

.picsim-submission-grade .grade {
    font-weight: 600;
    color: var(--picsim-success);
}

.picsim-submission-grade .pending {
    font-size: 12px;
    color: var(--picsim-warning);
}

.picsim-submission-grade .not-submitted {
    color: var(--picsim-text-dim);
}

.picsim-submission-actions {
    display: flex;
    gap: 8px;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

@media (max-width: 768px) {
    .picsim-dash-header {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .picsim-dash-nav {
        order: 3;
        width: 100%;
        justify-content: center;
    }
    
    .picsim-projects-grid {
        grid-template-columns: 1fr;
    }
    
    .picsim-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .picsim-editor-sidebar {
        position: absolute;
        left: -240px;
        height: 100%;
        z-index: 100;
        transition: left 0.3s;
    }
    
    .picsim-editor-sidebar.open {
        left: 0;
    }
}