/* ============================================================
 * PPT Studio — 界面样式
 * 深色工作台 + 白色幻灯片，让预览成为视觉主角。
 * ============================================================ */

:root{
  --bg:#0a0e15;
  --panel:#121824;
  --panel-2:#18202e;
  --panel-3:#1e2839;
  --line:#25314a;
  --line-soft:#1c2536;
  --text:#e7ecf5;
  --muted:#8b98ad;
  --muted-2:#5f6d84;
  --accent:#3b82f6;
  --accent-2:#8b5cf6;
  --ok:#22c55e;
  --warn:#f59e0b;
  --err:#ef4444;
  --radius:10px;
  --radius-lg:14px;
  --mono:"Cascadia Mono",Consolas,"SF Mono",Menlo,monospace;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font:14px/1.5 "Segoe UI","Microsoft YaHei","PingFang SC",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow:hidden;
}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
input,textarea,select{font:inherit;color:var(--text);background:var(--panel-2);
  border:1px solid var(--line);border-radius:var(--radius);padding:8px 10px;width:100%;outline:none;
  transition:border-color .15s,box-shadow .15s}
input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.16)}
textarea{resize:none;font-family:var(--mono);font-size:12.5px;line-height:1.65;tab-size:2}
::placeholder{color:var(--muted-2)}

/* ---------------- 布局 ---------------- */
.app{height:100vh;display:flex;flex-direction:column}
.main{flex:1;min-height:0;display:grid;grid-template-columns:340px minmax(0,1fr) 348px;gap:1px;background:var(--line-soft)}
.panel{background:var(--panel);min-height:0;display:flex;flex-direction:column}
.panel-scroll{overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px;flex:1}

/* ---------------- 顶栏 ---------------- */
.topbar{
  display:flex;align-items:center;gap:18px;padding:0 16px;height:58px;flex:0 0 58px;
  background:linear-gradient(180deg,#141b28,#101722);border-bottom:1px solid var(--line)
}
.brand{display:flex;align-items:center;gap:10px;min-width:210px}
.logo{
  width:32px;height:32px;display:grid;place-items:center;border-radius:9px;font-size:17px;color:#fff;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 4px 14px rgba(59,130,246,.35)
}
.brand-txt{display:flex;flex-direction:column;line-height:1.15}
.brand-txt b{font-size:14.5px;letter-spacing:.3px}
.brand-txt small{color:var(--muted);font-size:11.5px}

.theme-picker{display:flex;gap:7px;flex:1;flex-wrap:wrap}
.theme-dot{
  width:26px;height:26px;border-radius:50%;border:2px solid transparent;position:relative;
  transition:transform .15s,border-color .15s;box-shadow:inset 0 0 0 1px rgba(255,255,255,.12)
}
.theme-dot:hover{transform:translateY(-2px)}
.theme-dot.on{border-color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.14)}
.theme-dot i{position:absolute;right:-1px;bottom:-1px;width:9px;height:9px;border-radius:50%;border:1.5px solid #101722}

.topbar-actions{display:flex;gap:8px;align-items:center}

/* ---------------- 按钮 ---------------- */
.btn{
  border-radius:9px;padding:8px 14px;font-size:13px;font-weight:500;white-space:nowrap;
  background:var(--panel-3);border:1px solid var(--line);transition:background .15s,transform .08s,border-color .15s
}
.btn:hover{background:#263349}
.btn:active{transform:translateY(1px)}
.btn.primary{background:linear-gradient(135deg,#3b82f6,#2563eb);border-color:transparent;color:#fff;font-weight:600;
  box-shadow:0 4px 14px rgba(37,99,235,.32)}
.btn.primary:hover{background:linear-gradient(135deg,#4b8dfa,#2f6ff0)}
.btn.ai{background:linear-gradient(135deg,#7c3aed,#6366f1);border-color:transparent;color:#fff;font-weight:600}
.btn.ai:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent}
.btn.ghost:hover{background:var(--panel-3)}
.btn.sm{padding:6px 10px;font-size:12px}
.btn.mini{padding:1px 7px;font-size:11px;border-radius:6px;margin-left:6px;background:var(--panel-3)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btnrow{display:flex;gap:8px}
.btnrow .btn{flex:1;justify-content:center;text-align:center}

/* ---------------- 表单 ---------------- */
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field.grow{flex:1;min-height:150px}
.field label{font-size:12px;color:var(--muted);font-weight:500;display:flex;align-items:center}
.field.grow textarea{flex:1}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.hint{font-size:11.5px;color:var(--muted-2);margin:0;line-height:1.6}
.hint code,.syntax code{font-family:var(--mono);background:var(--panel-3);padding:1px 5px;border-radius:4px;font-size:11.5px}
.tip{
  font-size:12px;color:var(--muted);background:var(--panel-2);border:1px solid var(--line-soft);
  border-left:2px solid var(--accent);border-radius:8px;padding:9px 11px;margin:0;line-height:1.6
}
.tip.warn{border-left-color:var(--warn)}
.tip.err{border-left-color:var(--err)}
.tip.ok{border-left-color:var(--ok)}
.note{font-size:12px;color:var(--muted);background:rgba(59,130,246,.08);border:1px solid rgba(59,130,246,.22);
  border-radius:8px;padding:10px 12px;line-height:1.7;margin-top:4px}

/* ---------------- 舞台 ---------------- */
.stage{display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--bg)}
.stagebar{
  height:44px;flex:0 0 44px;display:flex;align-items:center;gap:14px;padding:0 14px;
  border-bottom:1px solid var(--line-soft);background:var(--panel)
}
.seg{display:flex;background:var(--panel-3);border-radius:8px;padding:2px;gap:2px}
.seg button{padding:5px 12px;border-radius:6px;font-size:12.5px;color:var(--muted)}
.seg button.on{background:var(--accent);color:#fff;font-weight:600}
.stage-meta{flex:1;color:var(--muted);font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.zoomer{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:12px}
.zoomer button{width:24px;height:24px;border-radius:6px;background:var(--panel-3);line-height:1;font-size:15px}
.zoomer button:hover{background:#263349}
.zoomer span{min-width:42px;text-align:center;font-variant-numeric:tabular-nums}

.stagebody{flex:1;min-height:0;overflow:auto;padding:20px}
.grid{display:grid;gap:18px;justify-content:center}

/* 缩略图 */
.thumb{position:relative;cursor:pointer;transition:transform .12s}
.thumb:hover{transform:translateY(-3px)}
.thumb .slide-frame{border-radius:6px;box-shadow:0 6px 22px rgba(0,0,0,.5);outline:1px solid rgba(255,255,255,.07)}
.thumb.on .slide-frame{outline:2px solid var(--accent);box-shadow:0 8px 26px rgba(59,130,246,.4)}
.thumb .idx{
  position:absolute;left:0;top:-19px;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums
}
.thumb .lay{
  position:absolute;right:0;top:-19px;font-size:11px;color:var(--muted-2)
}
.thumb .ops{
  position:absolute;right:6px;bottom:6px;display:none;gap:4px;background:rgba(10,14,21,.86);
  border-radius:8px;padding:4px;backdrop-filter:blur(6px)
}
.thumb:hover .ops{display:flex}
.thumb .ops button{width:24px;height:24px;border-radius:6px;font-size:12px;color:var(--muted);display:grid;place-items:center}
.thumb .ops button:hover{background:var(--panel-3);color:var(--text)}

/* 单页视图 */
.single{display:flex;flex-direction:column;align-items:center;gap:16px}
.single .slide-frame{border-radius:8px;box-shadow:0 18px 60px rgba(0,0,0,.6);outline:1px solid rgba(255,255,255,.08)}
.single-nav{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:12.5px}
.single-nav button{padding:6px 14px;border-radius:8px;background:var(--panel-3);border:1px solid var(--line)}
.single-nav button:hover{background:#263349}

/* ---------------- 幻灯片基元 ---------------- */
.slide-canvas{background:#fff}
.slide-canvas .op{box-sizing:border-box}
.op-text p{margin:0}
.op-text p.bullet::before{
  content:attr(data-b);display:inline-block;width:var(--bw,30px);
  color:var(--buc,currentColor);font-size:calc(1em * var(--bsz,1));vertical-align:baseline
}
.op-table table{border-collapse:collapse}

/* ---------------- 右侧检查器 ---------------- */
.panel-right{overflow-y:auto}
.insp{padding:16px;display:flex;flex-direction:column;gap:12px}
.insp-head{display:flex;align-items:center;justify-content:space-between;gap:8px}
.insp-head h3{margin:0;font-size:13.5px;font-weight:600}
.insp-head .tag{font-size:11px;color:var(--muted);background:var(--panel-3);padding:2px 8px;border-radius:20px}
.insp-sec{border-top:1px solid var(--line-soft);padding-top:12px;display:flex;flex-direction:column;gap:10px}
.insp-sec:first-of-type{border-top:0;padding-top:0}
.empty{padding:40px 20px;text-align:center;color:var(--muted-2);font-size:12.5px;line-height:1.8}
select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),
  linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 16px) 52%,calc(100% - 11px) 52%;background-size:5px 5px,5px 5px;
  background-repeat:no-repeat;padding-right:30px}

/* ---------------- 模态 ---------------- */
.modal{position:fixed;inset:0;background:rgba(5,8,13,.72);backdrop-filter:blur(3px);
  display:grid;place-items:center;z-index:60;padding:24px}
.modal[hidden]{display:none}
.modal-box{
  width:520px;max-width:100%;max-height:88vh;display:flex;flex-direction:column;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:0 24px 80px rgba(0,0,0,.6);animation:pop .16s ease-out
}
.modal-box.wide{width:760px}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.99)}to{opacity:1;transform:none}}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line-soft)}
.modal-head h3{margin:0;font-size:14.5px}
.modal-head .x{font-size:22px;line-height:1;color:var(--muted);padding:0 4px;border-radius:6px}
.modal-head .x:hover{color:var(--text);background:var(--panel-3)}
.modal-body{padding:18px;display:flex;flex-direction:column;gap:14px;overflow-y:auto}
.modal-body textarea{min-height:300px}
table.syntax{width:100%;border-collapse:collapse;font-size:12.5px}
table.syntax td{padding:7px 8px;border-bottom:1px solid var(--line-soft);vertical-align:top;color:var(--muted)}
table.syntax td:first-child{width:150px;color:var(--text)}

/* ---------------- 放映 ---------------- */
.present{position:fixed;inset:0;background:#05070b;z-index:80;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px}
.present[hidden]{display:none}
.present-stage{display:grid;place-items:center}
.present-stage .slide-frame{box-shadow:0 24px 90px rgba(0,0,0,.85);border-radius:6px;overflow:hidden}
.present-bar{display:flex;align-items:center;gap:14px;color:var(--muted);font-size:13px}
.present-bar button{padding:7px 16px;border-radius:8px;background:var(--panel-3);border:1px solid var(--line)}
.present-bar button:hover{background:#263349}
.present-bar .close{font-size:12px}

/* ---------------- Toast ---------------- */
.toast{
  position:fixed;left:50%;bottom:26px;transform:translate(-50%,20px);opacity:0;pointer-events:none;
  background:var(--panel-3);border:1px solid var(--line);border-radius:10px;padding:11px 18px;
  font-size:13px;box-shadow:0 12px 40px rgba(0,0,0,.5);transition:all .22s;z-index:90;max-width:70vw
}
.toast.on{opacity:1;transform:translate(-50%,0)}
.toast.ok{border-color:rgba(34,197,94,.5)}
.toast.err{border-color:rgba(239,68,68,.5)}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#2a3549;border-radius:6px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:#37455f;background-clip:content-box}
::-webkit-scrollbar-track{background:transparent}

/* 窄屏 */
@media (max-width:1180px){
  .main{grid-template-columns:300px minmax(0,1fr)}
  .panel-right{display:none}
}