/* ========================================
   SMS - 结构力学仿真系统样式 (适配宇泽官网深色主题)
   ======================================== */

:root {
    --sim-bg-primary: #0a0e1a;
    --sim-bg-secondary: #111827;
    --sim-bg-tertiary: #1a2332;
    --sim-bg-hover: #1e2d45;
    --sim-border: #1e3050;
    --sim-text-primary: #e0e0e8;
    --sim-text-secondary: #8899aa;
    --sim-text-muted: #556677;
    --sim-accent: #00d4ff;
    --sim-accent-dim: #0099cc;
    --sim-success: #00ff88;
    --sim-warning: #ff9800;
    --sim-error: #f44336;
    --sim-font-mono: 'Consolas', 'Monaco', monospace;
    --sim-font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

/* === Full-screen simulation page === */
body.sim-page {
    height: 100vh;
    overflow: hidden;
    background: var(--sim-bg-primary);
}

body.sim-page .footer {
    display: none !important;
}

body.sim-page .navbar {
    height: 44px;
    min-height: 44px;
    padding: 0;
}

body.sim-page .navbar .container {
    height: 44px;
    padding: 0 16px;
}

body.sim-page .nav-logo .logo-icon {
    width: 28px;
    height: 28px;
}

body.sim-page .nav-logo .logo-text {
    font-size: 13px;
}

body.sim-page .nav-menu li a {
    font-size: 12px;
    padding: 0 10px;
}

body.sim-page .btn-outline,
body.sim-page .btn-primary {
    padding: 4px 12px !important;
    font-size: 11px !important;
}

/* === Simulation Container === */
.sim-container {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 44px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--sim-bg-primary);
    font-family: var(--sim-font-sans);
    color: var(--sim-text-primary);
}

/* === Ribbon Tabs === */
#ribbon-tabs {
    background: var(--sim-bg-secondary);
    border-bottom: 1px solid var(--sim-border);
    display: flex;
    align-items: stretch;
    height: 30px;
    padding: 0 12px;
    flex-shrink: 0;
}

.ribbon-tab {
    padding: 4px 16px;
    font-size: 12px;
    cursor: pointer;
    color: var(--sim-text-secondary);
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
    user-select: none;
    display: flex;
    align-items: center;
}

.ribbon-tab:hover {
    color: var(--sim-text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.ribbon-tab.active {
    color: var(--sim-accent);
    border-bottom-color: var(--sim-accent);
    background: rgba(0, 212, 255, 0.06);
}

.project-name {
    margin-left: auto;
    font-size: 11px;
    color: var(--sim-text-muted);
    display: flex;
    align-items: center;
    padding: 0 12px;
}

.status {
    font-size: 10px;
    color: var(--sim-text-muted);
    display: flex;
    align-items: center;
    padding: 0 8px;
}

/* === Ribbon Toolbar === */
#ribbon {
    background: var(--sim-bg-secondary);
    border-bottom: 1px solid var(--sim-border);
    height: 72px;
    display: flex;
    align-items: center;
    padding: 0 8px;
    overflow-x: auto;
    flex-shrink: 0;
}

.ribbon-panel {
    display: none;
    align-items: center;
    height: 100%;
    gap: 0;
}

.ribbon-panel.active {
    display: flex;
}

.ribbon-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 3px 8px;
    height: 100%;
    justify-content: center;
}

.ribbon-group-items {
    display: flex;
    align-items: center;
    gap: 3px;
    flex: 1;
}

.ribbon-group-label {
    font-size: 9px;
    color: var(--sim-text-muted);
    text-align: center;
    padding-top: 2px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    width: 100%;
    white-space: nowrap;
}

.ribbon-sep {
    width: 1px;
    height: 52px;
    background: var(--sim-border);
    margin: 0 4px;
    flex-shrink: 0;
}

.ribbon-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4px 8px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    color: var(--sim-text-primary);
    min-width: 42px;
    transition: all 0.15s;
    font-family: inherit;
}

.ribbon-btn:hover {
    background: var(--sim-bg-hover);
    border-color: var(--sim-border);
}

.ribbon-btn.active {
    background: rgba(0, 212, 255, 0.15);
    border-color: var(--sim-accent);
    color: var(--sim-accent);
}

.ribbon-btn.accent {
    background: linear-gradient(135deg, #0066ff, #00d4ff);
    color: #fff;
    border: none;
}

.ribbon-btn.accent:hover {
    opacity: 0.85;
}

.ribbon-btn.solve-run {
    background: linear-gradient(135deg, #00c853, #00ff88);
    color: #050810;
    border: none;
    min-width: 56px;
    font-size: 12px;
    font-weight: 700;
}

.ribbon-btn.solve-run:hover {
    opacity: 0.85;
}

.rb-icon {
    font-size: 16px;
    line-height: 1;
}

.rb-label {
    font-size: 10px;
    line-height: 1.2;
    white-space: nowrap;
}

/* === Main Container === */
#main-container {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* === Left Panel === */
#left-panel {
    width: 200px;
    background: var(--sim-bg-secondary);
    border-right: 1px solid var(--sim-border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
}

.panel-header {
    padding: 6px 10px;
    font-size: 11px;
    font-weight: 600;
    color: var(--sim-accent);
    border-bottom: 1px solid var(--sim-border);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tree-empty {
    padding: 20px 10px;
    font-size: 11px;
    color: var(--sim-text-muted);
    text-align: center;
}

.tree-project {
    padding: 6px 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--sim-accent);
    border-bottom: 1px solid var(--sim-border);
    cursor: pointer;
}

.tree-project:hover {
    background: var(--sim-bg-hover);
}

.tree-group {
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}

.tree-node {
    padding: 4px 8px;
    font-size: 11px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--sim-text-primary);
    transition: background 0.1s;
}

.tree-node:hover {
    background: var(--sim-bg-hover);
}

.tree-node.active {
    background: rgba(0, 212, 255, 0.12);
    color: var(--sim-accent);
}

.tree-node.disabled {
    opacity: 0.3;
    cursor: default;
}

.tree-icon {
    font-size: 10px;
    width: 12px;
    text-align: center;
    flex-shrink: 0;
}

.tree-children {
    padding-left: 12px;
}

.tree-child {
    padding: 2px 8px;
    font-size: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 3px;
    color: var(--sim-text-secondary);
    transition: background 0.1s;
}

.tree-child:hover {
    background: var(--sim-bg-hover);
}

.tree-child.active {
    color: var(--sim-accent);
}

.tree-child .dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--sim-border);
    flex-shrink: 0;
}

.tree-child .dot.done {
    background: var(--sim-success);
}

.tree-child .name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* === Viewport === */
#viewport-container {
    flex: 1;
    position: relative;
    background: var(--sim-bg-primary);
    overflow: hidden;
}

#viewport {
    width: 100%;
    height: 100%;
}

#three-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

#viewport-info {
    position: absolute;
    bottom: 4px;
    left: 4px;
    display: flex;
    gap: 10px;
    font-size: 9px;
    font-family: var(--sim-font-mono);
    color: var(--sim-text-muted);
    background: rgba(0, 0, 0, 0.6);
    padding: 3px 8px;
    border-radius: 4px;
    backdrop-filter: blur(6px);
}

#color-legend {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 4px;
    padding: 3px;
    text-align: center;
    backdrop-filter: blur(6px);
}

#curve-overlay {
    position: absolute;
    inset: 40px;
    background: rgba(10, 14, 26, 0.95);
    border: 1px solid var(--sim-border);
    border-radius: 8px;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

#curve-canvas {
    width: 100%;
    height: 100%;
    max-width: 800px;
    max-height: 500px;
}

#legend-bar {
    width: 10px;
    height: 140px;
    margin: 0 auto;
    border-radius: 2px;
    background: linear-gradient(to bottom, #ff0000, #ffff00, #00ff00, #00ffff, #0000ff);
}

#legend-title {
    font-size: 7px;
    color: var(--sim-text-secondary);
    writing-mode: vertical-rl;
    margin-bottom: 2px;
}

#legend-range {
    display: flex;
    flex-direction: column;
    font-size: 6px;
    color: var(--sim-text-muted);
    font-family: var(--sim-font-mono);
}

/* === Right Panel === */
#right-panel {
    width: 240px;
    background: var(--sim-bg-secondary);
    border-left: 1px solid var(--sim-border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
}

.props-placeholder {
    padding: 16px 10px;
    font-size: 11px;
    color: var(--sim-text-muted);
    text-align: center;
}

.prop-section {
    border-bottom: 1px solid var(--sim-border);
}

.prop-title {
    padding: 5px 8px;
    font-size: 10px;
    font-weight: 600;
    color: var(--sim-text-secondary);
    background: var(--sim-bg-tertiary);
}

.prop-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 3px 8px;
    font-size: 10px;
}

.prop-row label {
    color: var(--sim-text-secondary);
    flex: 1;
}

.prop-row input,
.prop-row select {
    width: 100px;
    background: var(--sim-bg-primary);
    border: 1px solid var(--sim-border);
    color: var(--sim-text-primary);
    padding: 3px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-family: var(--sim-font-mono);
}

.prop-row input:focus,
.prop-row select:focus {
    outline: none;
    border-color: var(--sim-accent);
    box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.1);
}

.prop-row select {
    text-align: left;
    cursor: pointer;
}

.prop-value {
    font-family: var(--sim-font-mono);
    color: var(--sim-accent);
    font-size: 10px;
}

.btn-apply {
    width: calc(100% - 16px);
    margin: 5px 8px;
    padding: 5px;
    background: linear-gradient(135deg, #0066ff, #00d4ff);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.15s;
}

.btn-apply:hover {
    opacity: 0.85;
}

.btn-apply.green {
    background: linear-gradient(135deg, #00c853, #00ff88);
    color: #050810;
}

.btn-apply.solving {
    background: linear-gradient(135deg, #666, #999);
    cursor: not-allowed;
    opacity: 0.8;
}

.btn-apply:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.checkbox-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px 6px;
    padding: 2px 8px 4px;
}

.cb-label {
    font-size: 10px;
    color: var(--sim-text-secondary);
    display: flex;
    align-items: center;
    gap: 3px;
    cursor: pointer;
}

.cb-label input {
    accent-color: var(--sim-accent);
    width: 11px;
    height: 11px;
}

.result-summary {
    font-size: 10px;
    padding: 0 8px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 2px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.summary-row span:last-child {
    font-family: var(--sim-font-mono);
    color: var(--sim-accent);
}

.progress-bar {
    height: 3px;
    background: var(--sim-bg-primary);
    border-radius: 2px;
    overflow: hidden;
    margin: 4px 8px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #0066ff, #00d4ff);
    width: 0%;
    transition: width 0.3s;
}

.progress-text {
    font-size: 8px;
    color: var(--sim-text-muted);
    margin: 2px 8px;
    display: block;
}

/* === Dialog === */
#dialog-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.dialog {
    background: var(--sim-bg-secondary);
    border: 1px solid var(--sim-border);
    border-radius: 8px;
    min-width: 320px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
}

.dialog-header {
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 600;
    color: var(--sim-accent);
    border-bottom: 1px solid var(--sim-border);
}

.dialog-body {
    padding: 12px 16px;
}

.dialog-body .prop-row {
    padding: 6px 0;
}

.dialog-body input {
    width: 100%;
    padding: 5px 8px;
    font-size: 12px;
}

.dialog-footer {
    padding: 8px 16px;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    border-top: 1px solid var(--sim-border);
}

.btn-dialog {
    padding: 5px 16px;
    border: 1px solid var(--sim-border);
    background: var(--sim-bg-tertiary);
    color: var(--sim-text-primary);
    border-radius: 5px;
    font-size: 12px;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.15s;
}

.btn-dialog.btn-primary {
    background: linear-gradient(135deg, #0066ff, #00d4ff);
    color: #fff;
    border: none;
}

.btn-dialog:hover {
    background: var(--sim-bg-hover);
}

.btn-dialog.btn-primary:hover {
    opacity: 0.85;
}

/* === Console === */
#console {
    height: 80px;
    background: var(--sim-bg-secondary);
    border-top: 1px solid var(--sim-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.console-header {
    padding: 3px 10px;
    font-size: 10px;
    font-weight: 600;
    color: var(--sim-text-secondary);
    border-bottom: 1px solid var(--sim-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.console-header button {
    background: none;
    border: 1px solid var(--sim-border);
    color: var(--sim-text-muted);
    padding: 1px 6px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 9px;
    font-family: inherit;
}

.console-header button:hover {
    background: var(--sim-bg-hover);
}

#console-output {
    flex: 1;
    overflow-y: auto;
    padding: 2px 10px;
    font-family: var(--sim-font-mono);
    font-size: 9px;
}

.console-line {
    padding: 1px 0;
    color: var(--sim-text-secondary);
}

.console-line.info {
    color: var(--sim-accent);
}

.console-line.success {
    color: var(--sim-success);
}

.console-line.warning {
    color: var(--sim-warning);
}

.console-line.error {
    color: var(--sim-error);
}

/* === Context Menu === */
.context-menu {
    position: fixed;
    background: var(--sim-bg-tertiary);
    border: 1px solid var(--sim-border);
    border-radius: 5px;
    min-width: 100px;
    z-index: 300;
    padding: 3px 0;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

.context-menu-item {
    padding: 6px 16px;
    font-size: 11px;
    color: var(--sim-text-primary);
    cursor: pointer;
}

.context-menu-item:hover {
    background: var(--sim-error);
    color: #fff;
}

/* === Scrollbar === */
.sim-container ::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

.sim-container ::-webkit-scrollbar-track {
    background: var(--sim-bg-primary);
}

.sim-container ::-webkit-scrollbar-thumb {
    background: var(--sim-border);
    border-radius: 2px;
}

/* === Responsive === */
@media (max-width: 768px) {
    body.sim-page .navbar {
        height: 40px;
        min-height: 40px;
    }

    .sim-container {
        top: 40px;
    }

    #left-panel {
        display: none;
    }

    #right-panel {
        width: 200px;
    }

    .ribbon-tab {
        padding: 4px 10px;
        font-size: 10px;
    }

    .ribbon-btn {
        min-width: 34px;
        padding: 2px 5px;
    }

    .rb-icon {
        font-size: 13px;
    }

    .rb-label {
        font-size: 8px;
    }
}