/* =========================================================
   Modern Minimal UI (CSS only) — Replace entire style.css
   Targets existing classes in your app:
   desc-wrap/desc-card/desc-title, upload-header/chip,
   acc/acc-item, func-*, table-scroll, shiny inputs, cards
   ========================================================= */

/* -------------------------
   1) Theme tokens
------------------------- */
:root{
  --bg: #f7f8fb;
  --card-bg: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: rgba(15, 23, 42, 0.10);
  --border-strong: rgba(15, 23, 42, 0.14);
  --head: #f3f4f6;

  --primary: #2563eb;        /* blue */
  --primary-weak: rgba(37, 99, 235, 0.12);

  --radius: 14px;
  --radius-sm: 10px;

  --shadow-sm: 0 1px 2px rgba(2,6,23,0.06);
  --shadow: 0 10px 30px rgba(2,6,23,0.08);

  --ring: 0 0 0 4px rgba(37, 99, 235, 0.16);
}

/* -------------------------
   2) Page / typography base
------------------------- */
html, body{
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto,
               Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a{ color: var(--primary); text-decoration: none; }
a:hover{ text-decoration: underline; }

code, pre{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

/* Make overall spacing feel calmer */
.container-fluid, .bslib-page-fill{
  padding-top: 12px;
}

/* -------------------------
   3) Cards (bslib / shiny)
------------------------- */
.card,
.bslib-card,
.bslib-card-body{
  border-radius: var(--radius);
}

.card, .bslib-card{
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

/* Card header modern look */
.card-header, .bslib-card .card-header{
  background: transparent;
  border-bottom: 1px solid var(--border);
  padding: 14px 16px;
  font-weight: 700;
  letter-spacing: .2px;
}

/* Card body spacing */
.card-body, .bslib-card .card-body{
  padding: 14px 16px 16px;
}

/* -------------------------
   4) Top navigation (tabs)
------------------------- */
.nav-tabs{
  border-bottom: 1px solid var(--border);
  gap: 6px;
}

.nav-tabs .nav-link{
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  padding: 10px 14px;
  transition: all .15s ease;
}

.nav-tabs .nav-link:hover{
  background: rgba(2,6,23,0.04);
  color: var(--text);
}

.nav-tabs .nav-link.active{
  background: var(--card-bg);
  color: var(--text);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

/* Your custom class big-tab */
.big-tab{
  font-size: 18px;
  font-weight: 650;
}
.nav-link.active .big-tab{
  color: var(--text);
  font-weight: 750;
}

/* -------------------------
   5) Inputs (Shiny)
------------------------- */
.shiny-input-container{
  margin-bottom: 14px;
}

.shiny-input-container label{
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

/* Text / numeric / date range inputs */
.form-control,
.selectize-input,
.selectize-control.single .selectize-input,
.selectize-control.multi .selectize-input{
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: none;
  transition: box-shadow .15s ease, border-color .15s ease, background .15s ease;
  background: rgba(255,255,255,0.85);
}

.form-control:focus,
.selectize-input.focus{
  border-color: rgba(37,99,235,0.45);
  box-shadow: var(--ring);
  background: #fff;
}

/* Selectize dropdown */
.selectize-dropdown{
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

/* File input button */
.btn, .btn-default, .btn-primary{
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: none;
  transition: transform .06s ease, box-shadow .15s ease, background .15s ease;
}

.btn:hover{
  box-shadow: var(--shadow-sm);
}

.btn:active{
  transform: translateY(1px);
}

/* Primary action (task button etc.) */
.btn-primary{
  background: var(--primary);
  border-color: rgba(37,99,235,0.5);
}
.btn-primary:hover{
  background: #1d4ed8;
}

/* -------------------------
   6) Upload header chips
------------------------- */
.upload-header,
.func-header{
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 8px 0 14px;
  flex-wrap: wrap;
}

.upload-label,
.func-label{
  font-weight: 750;
  color: var(--text);
  padding-left: 2px;
}

.upload-chip,
.func-chip{
  background: rgba(37,99,235,0.10);
  color: #0b1b3a;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  border: 1px solid rgba(37,99,235,0.18);
  box-shadow: 0 1px 1px rgba(2,6,23,0.05);
}

.func-chip{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* -------------------------
   7) describe tables layout
------------------------- */
.desc-wrap{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: 8px 6px;
}

.desc-card{
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 14px 16px 16px;
  width: fit-content;
  max-width: 96vw;
}

/* Title */
.desc-title{
  text-align: center;
  font-weight: 800;
  font-size: 15px;
  margin: 2px 0 10px;
  color: var(--text);
  letter-spacing: 0.2px;
}

/* pandas table */
.desc-card table{
  margin-left: auto;
  margin-right: auto;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
  color: var(--text);
}

/* header cells */
.desc-card thead th{
  background: #f8fafc;
  border-bottom: 1px solid var(--border);
  padding: 10px 18px;
  text-align: center;
  font-weight: 800;
  white-space: nowrap;
}

/* body cells */
.desc-card tbody td{
  padding: 10px 18px;
  text-align: center;
  border-bottom: 1px solid rgba(15,23,42,0.07);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

/* index column */
.desc-card tbody th{
  padding: 10px 14px;
  text-align: left;
  font-weight: 800;
  border-bottom: 1px solid rgba(15,23,42,0.07);
  white-space: nowrap;
  color: var(--text);
}

/* zebra + hover */
.desc-card tbody tr:nth-child(even){
  background: rgba(2,6,23,0.02);
}
.desc-card tbody tr:hover{
  background: rgba(37,99,235,0.06);
}

/* last row no border */
.desc-card tbody tr:last-child td,
.desc-card tbody tr:last-child th{
  border-bottom: none;
}

/* -------------------------
   8) Accordion (details/summary)
------------------------- */
.acc{
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.acc-item{
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 10px 12px;
}

/* Remove default marker, add subtle caret */
.acc-item > summary{
  cursor: pointer;
  font-weight: 800;
  list-style: none;
  padding: 10px 8px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text);
}

.acc-item > summary::-webkit-details-marker{ display:none; }

.acc-item > summary::after{
  content: "⌄";
  font-weight: 900;
  color: rgba(15,23,42,0.55);
  transform: translateY(-1px);
  transition: transform .15s ease;
}

.acc-item[open] > summary::after{
  transform: rotate(180deg) translateY(1px);
}

.acc-item[open] > summary{
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
  padding-bottom: 12px;
}

/* Make inner desc-card align nicely */
.acc-item .desc-card{
  margin-left: auto;
  margin-right: auto;
}

/* -------------------------
   9) Function source code block
------------------------- */
.func-item{
  width: 100%;
  margin-top: 10px;
}

.func-source{
  background: #0b1020;
  color: #e5e7eb;
  border-radius: 12px;
  padding: 12px 12px;
  margin-top: 8px;
  border: 1px solid rgba(148,163,184,0.18);

  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;

  white-space: pre;
  overflow-x: auto;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

/* Nice scrollbar for code areas */
.func-source::-webkit-scrollbar{ height: 10px; }
.func-source::-webkit-scrollbar-track{ background: rgba(255,255,255,0.08); border-radius: 999px; }
.func-source::-webkit-scrollbar-thumb{ background: rgba(203,213,225,0.55); border-radius: 999px; }
.func-source::-webkit-scrollbar-thumb:hover{ background: rgba(203,213,225,0.75); }

/* -------------------------
   10) Backtest Table (table-scroll)
------------------------- */
.table-scroll{
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  box-shadow: var(--shadow-sm);
}

/* scrollbars */
.table-scroll::-webkit-scrollbar{ height: 10px; }
.table-scroll::-webkit-scrollbar-track{ background: rgba(2,6,23,0.06); border-radius: 999px; }
.table-scroll::-webkit-scrollbar-thumb{ background: rgba(100,116,139,0.45); border-radius: 999px; }
.table-scroll::-webkit-scrollbar-thumb:hover{ background: rgba(100,116,139,0.65); }

/* table */
.table-scroll table{
  width: 100%;
  table-layout: fixed;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
  color: var(--text);
}

/* sticky header */
.table-scroll thead th{
  position: sticky;
  top: 0;
  z-index: 2;
  background: #f8fafc;
  color: var(--text);
  font-weight: 800;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

/* cells */
.table-scroll tbody td,
.table-scroll tbody th{
  padding: 10px 12px;
  border-bottom: 1px solid rgba(15,23,42,0.06);
  vertical-align: middle;
}

/* first column */
.table-scroll tbody th{
  background: rgba(2,6,23,0.015);
  font-weight: 800;
  color: var(--text);
  text-align: left;
}

/* numeric columns */
.table-scroll tbody td{
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

/* prevent overflow */
.table-scroll th,
.table-scroll td{
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* zebra + hover */
.table-scroll tbody tr:nth-child(even){
  background: rgba(2,6,23,0.02);
}
.table-scroll tbody tr:hover{
  background: rgba(37,99,235,0.06);
}

/* rounded corners */
.table-scroll thead th:first-child{ border-top-left-radius: var(--radius); }
.table-scroll thead th:last-child{ border-top-right-radius: var(--radius); }
.table-scroll tbody tr:last-child th:first-child{ border-bottom-left-radius: var(--radius); }
.table-scroll tbody tr:last-child td:last-child{ border-bottom-right-radius: var(--radius); }

/* optional: show full content on hover */
.table-scroll td:hover{
  white-space: normal;
  word-break: break-word;
}

/* -------------------------
   11) Small polish for plots / outputs spacing
------------------------- */
.shiny-plot-output,
.html-widget,
.dataTables_wrapper{
  border-radius: var(--radius);
}

/* Slightly reduce excessive margins in some outputs */
pre, .shiny-text-output{
  margin: 8px 0 0;
  color: var(--muted);
}

/* -------------------------
   12) Reduce “busy” feel on small screens
------------------------- */
@media (max-width: 768px){
  .nav-tabs .nav-link{ padding: 9px 12px; }
  .desc-card thead th,
  .desc-card tbody td{ padding: 10px 12px; }
  .desc-card tbody th{ padding: 10px 10px; }
}

/* =========================================================
   EXTRA POLISH (append to end of style.css)
   - Sticky frosted top nav
   - Card hover micro-interactions
   ========================================================= */

/* --- A) Sticky / Frosted Tabs Bar --- */
/* Works for common Shiny layouts where .nav-tabs sits near top */
.nav-tabs{
  position: sticky;
  top: 0;
  z-index: 999;

  /* frosted glass */
  background: rgba(247, 248, 251, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);

  padding: 10px 6px;
  margin: 0 -6px 10px; /* extend slightly */
  border-bottom: 1px solid rgba(15, 23, 42, 0.10);
}

/* give the whole bar a subtle "floating" edge */
.nav-tabs::after{
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 18px;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(247,248,251,0.65), rgba(247,248,251,0));
}

/* --- B) Card Hover / Lift --- */
.card, .bslib-card, .desc-card, .acc-item, .table-scroll{
  transition:
    transform .14s ease,
    box-shadow .18s ease,
    border-color .18s ease,
    background .18s ease;
  will-change: transform;
}

/* lift on hover (desktop) */
@media (hover:hover){
  .card:hover,
  .bslib-card:hover,
  .desc-card:hover,
  .acc-item:hover,
  .table-scroll:hover{
    transform: translateY(-2px);
    box-shadow: 0 14px 38px rgba(2,6,23,0.10);
    border-color: rgba(15,23,42,0.14);
  }
}

/* --- C) Subtle interactive feel for buttons & inputs --- */
.btn{
  transition: transform .06s ease, box-shadow .16s ease, filter .16s ease;
}
.btn:hover{ filter: brightness(0.98); }
.btn:active{ transform: translateY(1px) scale(0.99); }

/* make focus states feel consistent and premium */
.form-control:focus,
.selectize-input.focus,
.btn:focus{
  outline: none !important;
}

/* --- D) Slightly nicer global scrollbars (optional, modern) --- */
*::-webkit-scrollbar{ height: 10px; width: 10px; }
*::-webkit-scrollbar-track{ background: rgba(2,6,23,0.06); border-radius: 999px; }
*::-webkit-scrollbar-thumb{ background: rgba(100,116,139,0.40); border-radius: 999px; }
*::-webkit-scrollbar-thumb:hover{ background: rgba(100,116,139,0.60); }

/* --- E) A tiny animation for accordion open --- */
.acc-item{
  overflow: hidden;
}
.acc-item > summary{
  transition: background .15s ease;
  border-radius: 12px;
}
.acc-item > summary:hover{
  background: rgba(2,6,23,0.03);
}
.acc-item[open]{
  box-shadow: 0 16px 44px rgba(2,6,23,0.10);
}

/* --- F) Keep nav links feeling "app-like" under frosted bar --- */
.nav-tabs .nav-link{
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.nav-tabs .nav-link.active{
  box-shadow: 0 12px 30px rgba(2,6,23,0.10);
  border-color: rgba(15,23,42,0.12);
}


/* =========================================
   MAX WIDTH LAYOUT (centered content)
   ========================================= */

/* 主体内容最大宽度 */
.container-fluid,
.bslib-page-fill,
.main-container,
#shiny-content{
  max-width: 1200px;     /* 你可以改成 1100 / 1300 试试 */
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* tab 内容区域也一起限制 */
.tab-content{
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}