/* ============================================================
   BlueBone (蓝色骨头) — Web Design System
   Drop-in stylesheet for internal sites / dashboards / web apps.
   Link this file, then build with the --bb-* tokens and the
   base components below. Edit only :root to re-theme globally.
   ============================================================ */

/* ---- Self-hosted brand fonts (offline-safe, no CDN) ---- */
@font-face{font-family:'Poppins';font-style:normal;font-weight:600;font-display:swap;src:url('fonts/poppins-600.woff2') format('woff2');}
@font-face{font-family:'Poppins';font-style:normal;font-weight:700;font-display:swap;src:url('fonts/poppins-700.woff2') format('woff2');}
@font-face{font-family:'Poppins';font-style:normal;font-weight:800;font-display:swap;src:url('fonts/poppins-800.woff2') format('woff2');}
@font-face{font-family:'Poppins';font-style:normal;font-weight:900;font-display:swap;src:url('fonts/poppins-900.woff2') format('woff2');}
@font-face{font-family:'Manrope';font-style:normal;font-weight:400;font-display:swap;src:url('fonts/manrope-400.woff2') format('woff2');}
@font-face{font-family:'Manrope';font-style:normal;font-weight:500;font-display:swap;src:url('fonts/manrope-500.woff2') format('woff2');}
@font-face{font-family:'Manrope';font-style:normal;font-weight:600;font-display:swap;src:url('fonts/manrope-600.woff2') format('woff2');}
@font-face{font-family:'Manrope';font-style:normal;font-weight:700;font-display:swap;src:url('fonts/manrope-700.woff2') format('woff2');}
@font-face{font-family:'Manrope';font-style:normal;font-weight:800;font-display:swap;src:url('fonts/manrope-800.woff2') format('woff2');}

:root{
  /* Brand blue scale */
  --bb-blue-50:#EEF0FE; --bb-blue-100:#DDE0FE; --bb-blue-200:#BCC2FD;
  --bb-blue-300:#97A0FB; --bb-blue-400:#6571F9; --bb-blue-500:#2B39F7;
  --bb-blue-600:#1C28D9; --bb-blue-700:#1620AB; --bb-blue-800:#141C82; --bb-blue-900:#121A5E;
  /* Neutrals (cool-tinted) */
  --bb-white:#FFFFFF; --bb-ink:#0A0A0F;
  --bb-gray-900:#16161D; --bb-gray-800:#26262F; --bb-gray-700:#3A3A45;
  --bb-gray-600:#55555F; --bb-gray-500:#7A7A85; --bb-gray-400:#A0A0AA;
  --bb-gray-300:#C7C7CF; --bb-gray-200:#E2E2E7; --bb-gray-100:#F0F0F3; --bb-gray-50:#F8F8FA;
  /* Foil + story accents (use sparingly) */
  --bb-gold:#B5933F; --bb-silver:#B8BCC4;
  --bb-story-red:#E5352B; --bb-story-yellow:#F2B600; --bb-story-blue:var(--bb-blue-500);
  /* Semantic */
  --bb-primary:var(--bb-blue-500); --bb-text-strong:var(--bb-ink);
  --bb-text-body:var(--bb-gray-800); --bb-text-muted:var(--bb-gray-600);
  --bb-success:#1F9D55; --bb-warning:#E5832B; --bb-danger:#E5352B;
  /* Surfaces */
  --bb-bg:var(--bb-gray-50); --bb-surface:var(--bb-white); --bb-border:var(--bb-gray-200);
  /* Type */
  --bb-font-display:'Poppins','PingFang SC','Heiti SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
  --bb-font-sans:'Manrope','PingFang SC','Heiti SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,sans-serif;
  --bb-font-cn:'PingFang SC','Heiti SC','Microsoft YaHei','Noto Sans SC','Manrope',system-ui,sans-serif;
  --bb-slant:skewX(-11deg);          /* signature 79° wordmark slant — use sparingly */
  --bb-tracking-caps:0.12em; --bb-tracking-tight:-0.02em;
  /* Radius / shadow */
  --bb-radius-sm:8px; --bb-radius-md:12px; --bb-radius-lg:18px; --bb-radius-xl:28px; --bb-radius-pill:999px;
  --bb-shadow-sm:0 2px 6px rgba(18,26,94,.08);
  --bb-shadow-md:0 6px 18px rgba(18,26,94,.10);
  --bb-shadow-lg:0 16px 40px rgba(18,26,94,.14);
  --bb-shadow-brand:0 10px 30px rgba(43,57,247,.30);
  /* Layout */
  --bb-container:1200px; --bb-gap:24px;
}

/* ---- Reset + base ---- */
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--bb-bg);font-family:var(--bb-font-sans);color:var(--bb-text-body);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;}
a{color:var(--bb-primary);text-decoration:none;}
a:hover{text-decoration:underline;}
img,svg{display:block;max-width:100%;}

/* ---- Typography ---- */
h1,h2,h3,h4{font-family:var(--bb-font-display);color:var(--bb-text-strong);
  letter-spacing:var(--bb-tracking-tight);line-height:1.1;font-weight:700;}
h1{font-size:clamp(36px,5vw,60px);font-weight:800;}
h2{font-size:clamp(28px,3.5vw,40px);}
h3{font-size:22px;}
.eyebrow{font-family:var(--bb-font-display);font-weight:600;font-size:14px;
  letter-spacing:var(--bb-tracking-caps);text-transform:uppercase;color:var(--bb-primary);}
.lede{font-size:clamp(18px,2vw,22px);line-height:1.55;color:var(--bb-text-muted);max-width:60ch;}
.muted{color:var(--bb-text-muted);}

/* ---- Layout helpers ---- */
.container{max-width:var(--bb-container);margin:0 auto;padding:0 24px;}
.section{padding:72px 0;}
.grid{display:grid;gap:var(--bb-gap);}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
@media(max-width:860px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}}

/* ---- Top nav ---- */
.bb-nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:28px;
  height:64px;padding:0 24px;background:rgba(255,255,255,.82);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--bb-border);}
.bb-nav .brand{height:26px;}
.bb-nav .links{display:flex;gap:22px;margin-left:8px;}
.bb-nav .links a{color:var(--bb-text-body);font-weight:600;font-size:15px;}
.bb-nav .links a:hover{color:var(--bb-primary);text-decoration:none;}
.bb-nav .spacer{margin-left:auto;}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--bb-font-sans);
  font-weight:700;font-size:15px;padding:12px 24px;border-radius:var(--bb-radius-pill);
  border:none;cursor:pointer;transition:transform .12s,box-shadow .12s;}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--bb-primary);color:#fff;box-shadow:var(--bb-shadow-brand);}
.btn-primary:hover{transform:translateY(-1px);}
.btn-ghost{background:transparent;color:var(--bb-primary);border:2px solid var(--bb-blue-200);}
.btn-ghost:hover{background:var(--bb-blue-50);}

/* ---- Badges ---- */
.badge{display:inline-flex;align-items:center;font-family:var(--bb-font-display);font-weight:700;
  font-size:12px;padding:5px 12px;border-radius:var(--bb-radius-pill);
  letter-spacing:.04em;text-transform:uppercase;}
.badge-blue{background:var(--bb-blue-50);color:var(--bb-blue-600);}
.badge-solid{background:var(--bb-primary);color:#fff;}
.badge-gold{background:#F7F0DC;color:var(--bb-gold);}

/* ---- Cards ---- */
.card{background:var(--bb-surface);border:1px solid var(--bb-border);border-radius:var(--bb-radius-lg);
  padding:28px;box-shadow:var(--bb-shadow-sm);}
.card .ic{width:48px;height:48px;border-radius:var(--bb-radius-md);background:var(--bb-blue-50);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
.card .ic svg{width:24px;height:24px;stroke:var(--bb-primary);stroke-width:2;fill:none;}
.card h3{margin-bottom:8px;}
.card p{color:var(--bb-text-muted);}

/* ---- KPI / stat ---- */
.kpi .big{font-family:var(--bb-font-display);font-weight:900;font-size:48px;color:var(--bb-primary);line-height:1;}
.kpi .label{color:var(--bb-text-muted);font-size:15px;margin-top:6px;}

/* ---- Hero (brand gradient) ---- */
.bb-hero{position:relative;overflow:hidden;color:#fff;
  background:radial-gradient(120% 90% at 100% 0%,var(--bb-blue-400) 0%,var(--bb-blue-500) 42%,var(--bb-blue-700) 100%);}
.bb-hero .container{padding-top:96px;padding-bottom:96px;}
.bb-hero h1{color:#fff;}
.bb-hero .lede{color:var(--bb-blue-100);}
.bb-hero .slant-accent{position:absolute;top:-40px;right:-60px;width:380px;height:380px;
  background:rgba(255,255,255,.06);transform:var(--bb-slant);border-radius:40px;}

/* ---- Tables ---- */
.bb-table{width:100%;border-collapse:collapse;background:var(--bb-surface);
  border:1px solid var(--bb-border);border-radius:var(--bb-radius-md);overflow:hidden;}
.bb-table th{background:var(--bb-gray-50);font-family:var(--bb-font-display);text-align:left;
  font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--bb-text-muted);padding:14px 18px;}
.bb-table td{padding:14px 18px;border-top:1px solid var(--bb-border);font-size:15px;}

/* ---- Footer ---- */
.bb-footer{background:var(--bb-ink);color:var(--bb-gray-400);padding:48px 0;font-size:14px;}
.bb-footer .brand{height:24px;margin-bottom:16px;}

/* ---- Inline helpers ---- */
.row{display:flex;align-items:center;gap:12px;}
.row.wrap{flex-wrap:wrap;}
.row.between{justify-content:space-between;}
.grow{flex:1;min-width:0;}
.push{margin-left:auto;}
.divider{height:1px;background:var(--bb-border);border:0;margin:24px 0;}
.surface{background:var(--bb-surface);}

/* ---- Forms ---- */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px;}
.field>label{font-weight:600;font-size:14px;color:var(--bb-text-body);}
.input,.select,.textarea{font-family:var(--bb-font-sans);font-size:15px;color:var(--bb-text-strong);
  background:var(--bb-surface);border:1.5px solid var(--bb-border);border-radius:var(--bb-radius-sm);
  padding:11px 14px;width:100%;transition:border-color .12s,box-shadow .12s;}
.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--bb-primary);
  box-shadow:0 0 0 3px var(--bb-blue-100);}
.input::placeholder{color:var(--bb-gray-400);}
.textarea{resize:vertical;min-height:96px;line-height:1.5;}
.hint{font-size:13px;color:var(--bb-text-muted);}

/* ---- Alerts ---- */
.alert{display:flex;gap:12px;padding:14px 16px;border-radius:var(--bb-radius-md);
  font-size:15px;border:1px solid;}
.alert-info{background:var(--bb-blue-50);border-color:var(--bb-blue-200);color:var(--bb-blue-800);}
.alert-success{background:#E8F6EE;border-color:#A8DCC0;color:#0F6B38;}
.alert-warning{background:#FDF3E2;border-color:#F4D9A8;color:#8A5A12;}
.alert-danger{background:#FCEAE9;border-color:#F4B8B4;color:#9A201A;}

/* ---- Tags / chips ---- */
.tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;
  padding:4px 10px;border-radius:var(--bb-radius-pill);background:var(--bb-gray-100);color:var(--bb-text-body);}
.tag .dot{width:7px;height:7px;border-radius:50%;background:var(--bb-primary);flex:none;}

/* ---- Tabs ---- */
.bb-tabs{display:flex;gap:4px;border-bottom:1px solid var(--bb-border);}
.bb-tabs a{padding:10px 16px;font-weight:600;font-size:15px;color:var(--bb-text-muted);
  border-bottom:2px solid transparent;margin-bottom:-1px;}
.bb-tabs a:hover{color:var(--bb-text-body);text-decoration:none;}
.bb-tabs a.active{color:var(--bb-primary);border-bottom-color:var(--bb-primary);}

/* ---- Progress ---- */
.progress{height:8px;background:var(--bb-gray-200);border-radius:var(--bb-radius-pill);overflow:hidden;}
.progress>span{display:block;height:100%;background:var(--bb-primary);border-radius:inherit;}

/* ---- Stat card (dashboard KPI) ---- */
.stat-card{background:var(--bb-surface);border:1px solid var(--bb-border);
  border-radius:var(--bb-radius-lg);padding:20px 22px;box-shadow:var(--bb-shadow-sm);}
.stat-card .label{font-family:var(--bb-font-display);font-weight:600;font-size:13px;
  text-transform:uppercase;letter-spacing:.06em;color:var(--bb-text-muted);}
.stat-card .big{font-family:var(--bb-font-display);font-weight:900;font-size:34px;
  color:var(--bb-text-strong);line-height:1.1;margin-top:6px;}
.stat-card .trend{font-size:13px;font-weight:700;margin-top:6px;}
.trend.up{color:var(--bb-success);} .trend.down{color:var(--bb-danger);}

/* ---- App shell (sidebar dashboard / admin) ---- */
.bb-app{display:grid;grid-template-columns:248px 1fr;min-height:100vh;}
.bb-sidebar{background:var(--bb-ink);color:var(--bb-gray-300);padding:18px 14px;
  position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:4px;overflow-y:auto;}
.bb-sidebar .brand{height:24px;margin:6px 10px 16px;}
.bb-sidebar .group-label{font-size:11px;text-transform:uppercase;letter-spacing:.1em;
  color:var(--bb-gray-600);margin:16px 12px 4px;}
.bb-sidebar a{display:flex;align-items:center;gap:10px;padding:10px 12px;
  border-radius:var(--bb-radius-sm);color:var(--bb-gray-400);font-weight:600;font-size:14px;}
.bb-sidebar a:hover{background:rgba(255,255,255,.06);color:#fff;text-decoration:none;}
.bb-sidebar a.active{background:var(--bb-primary);color:#fff;box-shadow:var(--bb-shadow-brand);}
.bb-sidebar a svg{width:18px;height:18px;stroke:currentColor;stroke-width:2;fill:none;flex:none;}
.bb-main{padding:26px 32px;min-width:0;}
.bb-topbar{display:flex;align-items:center;gap:16px;margin-bottom:24px;}
.bb-topbar h2{font-size:24px;}
@media(max-width:860px){
  .bb-app{grid-template-columns:1fr;}
  .bb-sidebar{position:static;height:auto;flex-direction:row;align-items:center;overflow-x:auto;}
  .bb-sidebar .group-label,.bb-sidebar .brand{display:none;}
  .bb-main{padding:20px;}
}

/* ---- Auth / centered card layout ---- */
.bb-auth{min-height:100vh;display:grid;place-items:center;padding:24px;
  background:radial-gradient(120% 80% at 100% 0%,var(--bb-blue-500) 0%,var(--bb-blue-700) 70%,var(--bb-blue-900) 100%);}
.bb-auth .panel{width:100%;max-width:400px;background:var(--bb-surface);
  border-radius:var(--bb-radius-xl);box-shadow:var(--bb-shadow-lg);padding:36px 32px;}
.bb-auth .panel .brand{height:26px;margin-bottom:24px;}