/* =====================================================================
   HIMSR Alumni Network — application design system
   Mobile-first. Unified app shell (sidebar + topbar) for signed-in area,
   plus split-screen auth and simple public layouts.
   ===================================================================== */
:root{
  --green:#006b5d;
  --green-dark:#00534b;
  --green-light:#eaf6f3;
  --navy:#12283a;
  --ink:#1f2d38;
  --text:#33424d;
  --muted:#6a7883;
  --line:#e5ecee;
  --bg:#f4f7f8;
  --white:#fff;
  --danger:#b3261e; --danger-bg:#fdeceb; --danger-line:#f3c9c6;
  --ok:#1c7d4b;     --ok-bg:#e8f6ee;     --ok-line:#bfe3cd;
  --warn:#8a6d1a;   --warn-bg:#fbf3d9;   --warn-line:#ecdfae;
  --info:#0e5a67;   --info-bg:#e2f2f4;   --info-line:#bfdfe3;
  --shadow-sm:0 1px 3px rgba(18,40,58,.06);
  --shadow:0 6px 24px rgba(18,40,58,.08);
  --radius:10px;
  --radius-sm:7px;
  --sidebar-w:250px;
  --topbar-h:60px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.55;font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
h1,h2,h3,h4{color:var(--ink);line-height:1.25}

/* ---------- layout containers ---------- */
.container{width:min(1120px,100%);margin:auto;padding:0 16px}

/* =====================================================================
   APP SHELL (signed-in)
   ===================================================================== */
.layout{display:flex;min-height:100vh}

/* Sidebar */
.sidebar{
  width:var(--sidebar-w);flex:none;background:#083b3a;color:#dcefe9;
  display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:40;
  transform:translateX(0);transition:transform .25s ease;
}
.sidebar-head{
  height:var(--topbar-h);display:flex;align-items:center;gap:10px;
  padding:0 18px;border-bottom:1px solid rgba(255,255,255,.08);flex:none;
}
.sidebar-head .logo-badge{
  width:34px;height:34px;border-radius:8px;background:#fff;color:var(--green);
  display:grid;place-items:center;font-weight:800;font-family:Georgia,serif;flex:none;font-size:15px;
}
.sidebar-head strong{display:block;font-size:15px;color:#fff;font-family:Georgia,serif;line-height:1.1}
.sidebar-head span{display:block;font-size:11px;color:#9fc7bf;letter-spacing:.3px}
.sidebar-nav{flex:1;overflow-y:auto;padding:14px 12px}
.nav-section{margin:6px 0 4px;padding:0 10px;font-size:11px;text-transform:uppercase;
  letter-spacing:.6px;color:#7ba9a0;font-weight:700}
.nav-item{
  display:flex;align-items:center;gap:12px;padding:9px 12px;border-radius:8px;
  color:#b9d6cd;font-size:14px;font-weight:500;margin:1px 0;transition:background .15s,color .15s;
}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff;text-decoration:none}
.nav-item.active{background:var(--green);color:#fff;font-weight:600;box-shadow:0 1px 6px rgba(0,0,0,.15)}
.nav-item .ic{width:20px;height:20px;flex:none;display:inline-flex;align-items:center;justify-content:center;color:#8fb9b0}
.nav-item .ic svg{width:19px;height:19px}
.nav-item:hover .ic,.nav-item.active .ic{color:currentColor}
.nav-item .nav-badge{margin-left:auto;background:#e9b949;color:#3a2d00;font-size:11px;
  font-weight:700;border-radius:20px;padding:1px 8px}
.sidebar-foot{padding:12px;border-top:1px solid rgba(255,255,255,.08);flex:none}

/* Main column */
.app-main{flex:1;min-width:0;display:flex;flex-direction:column;margin-left:var(--sidebar-w)}
.app-topbar{
  height:var(--topbar-h);position:sticky;top:0;z-index:30;background:var(--white);
  border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;padding:0 18px;
}
.menu-toggle{display:none;background:none;border:0;font-size:22px;color:var(--ink);cursor:pointer;padding:4px;line-height:1}
.topbar-title{font-weight:700;color:var(--ink);font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-user{margin-left:auto;display:flex;align-items:center;gap:12px;font-size:14px}
.topbar-user .uname{color:var(--muted);max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.avatar-dot{width:32px;height:32px;border-radius:50%;background:var(--green-light);color:var(--green);
  display:grid;place-items:center;font-weight:700;flex:none}
.app-content{flex:1;padding:24px 22px 40px}
.app-content .container{width:100%;max-width:1080px;padding:0}

/* Sidebar overlay (mobile) */
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(8,30,30,.45);z-index:39}

/* =====================================================================
   PUBLIC / SIMPLE header (logged-out non-auth pages)
   ===================================================================== */
.simplebar{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.simplebar .inner{height:60px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;color:var(--green)}
.brand .logo-badge{width:34px;height:34px;border-radius:8px;background:var(--green);color:#fff;
  display:grid;place-items:center;font-weight:800;font-family:Georgia,serif;flex:none}
.brand strong{font-family:Georgia,serif;font-size:18px;line-height:1;display:block;color:var(--ink)}
.brand span{font-size:11px;color:var(--muted);display:block}
.simple-actions{display:flex;gap:10px;align-items:center}

/* =====================================================================
   COMPONENTS
   ===================================================================== */
.page{max-width:1080px}
.page-title{margin:0 0 20px;font-size:24px;color:var(--ink)}
.page-title .sub{display:block;font-size:14px;color:var(--muted);font-weight:400;margin-top:4px}

.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-sm)}
a.card,a.card:hover,a.card:hover *{text-decoration:none}
a.card{transition:box-shadow .15s}
a.card:hover{box-shadow:var(--shadow)}
.card h2{margin:0 0 16px;font-size:18px;color:var(--ink)}
.card h3{margin:0 0 8px;font-size:15px;color:var(--ink)}
.stack>*+*{margin-top:16px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.muted{color:var(--muted)}
.center{text-align:center}
code{background:#eef2f3;border-radius:4px;padding:1px 5px;font-size:.86em}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:var(--radius-sm);
  padding:10px 17px;border:1px solid var(--green);font-weight:600;font-size:14px;cursor:pointer;
  background:var(--white);color:var(--green);line-height:1;transition:background .15s,box-shadow .15s;white-space:nowrap}
.btn:hover{text-decoration:none;box-shadow:var(--shadow-sm)}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-dark)}
.btn-dark{background:#0b3b43;color:#fff;border-color:#0b3b43}
.btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn-sm{padding:7px 12px;font-size:13px}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.btn-block{width:100%}

/* forms */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:#3f4e59;margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;padding:11px 12px;border:1px solid #cdd8db;border-radius:var(--radius-sm);
  font-size:14px;font-family:inherit;color:var(--text);background:#fff;transition:border-color .15s,box-shadow .15s}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(0,107,93,.13)}
.field .hint{font-size:12px;color:var(--muted);margin-top:5px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.check{display:flex;gap:9px;align-items:flex-start;font-size:14px;color:#3f4e59;cursor:pointer}
.check input{width:auto;margin-top:3px;flex:none}

/* alerts */
.alert{padding:12px 15px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:18px;border:1px solid transparent}
.alert-error{background:var(--danger-bg);color:var(--danger);border-color:var(--danger-line)}
.alert-ok{background:var(--ok-bg);color:var(--ok);border-color:var(--ok-line)}
.alert-warn{background:var(--warn-bg);color:var(--warn);border-color:var(--warn-line)}
.alert-info{background:var(--info-bg);color:var(--info);border-color:var(--info-line)}
.errors{margin:0 0 18px;padding:12px 15px 12px 32px;background:var(--danger-bg);
  border:1px solid var(--danger-line);border-radius:var(--radius-sm);color:var(--danger);font-size:13px}
.errors li{margin:3px 0}

/* pills */
.pill{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600;white-space:nowrap}
.pill-warn{background:var(--warn-bg);color:var(--warn)}
.pill-ok{background:var(--ok-bg);color:var(--ok)}
.pill-info{background:var(--info-bg);color:var(--info)}
.pill-danger{background:var(--danger-bg);color:var(--danger)}
.pill-muted{background:#eef2f3;color:var(--muted)}

/* tables (scroll on small screens) */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.table{width:100%;border-collapse:collapse;font-size:14px;min-width:520px}
.table th,.table td{text-align:left;padding:11px 13px;border-bottom:1px solid var(--line);vertical-align:top}
.table th{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.5px;font-weight:700;white-space:nowrap}
.table tr:last-child td{border-bottom:0}

/* stat cards row */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px}
.stat-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow-sm);display:block;color:inherit}
.stat-card:hover{text-decoration:none;box-shadow:var(--shadow)}
.stat-card .n{font-size:30px;font-weight:700;color:var(--ink);line-height:1.1}
.stat-card .l{color:var(--muted);font-size:13px;margin-top:3px}

/* directory / profile cards grid */
.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}

/* =====================================================================
   AUTH split-screen (login / register)
   ===================================================================== */
.auth-wrap{min-height:100vh;display:grid;grid-template-columns:1.05fr .95fr}
.auth-hero{background:linear-gradient(135deg,var(--green),var(--green-dark));color:#fff;
  padding:56px 48px;display:flex;flex-direction:column;justify-content:center}
.auth-hero h1{font-size:32px;line-height:1.12;margin:0 0 14px;color:#fff}
.auth-hero p{font-size:15px;color:#d9eeea;max-width:420px}
.auth-hero ul{list-style:none;padding:0;margin:24px 0 0}
.auth-hero li{margin:12px 0;font-size:14px;color:#eafaf6;display:flex;gap:10px;align-items:flex-start}
.auth-hero li:before{content:"✓";display:inline-grid;place-items:center;width:20px;height:20px;
  border:1px solid rgba(255,255,255,.6);border-radius:50%;flex:none;font-size:12px}
.auth-panel{background:var(--white);padding:40px 24px;display:flex;align-items:center;justify-content:center}
.auth-card{width:100%;max-width:400px}
.auth-card h2{margin:0 0 6px;color:var(--ink);font-size:24px}
.auth-card .sub{color:var(--muted);font-size:14px;margin:0 0 24px}
.auth-card .foot{margin-top:20px;font-size:14px;color:var(--muted);text-align:center}
.search{display:flex;margin:4px 0}
.search input{flex:1;min-width:0;border:1px solid #cdd8db;border-right:0;border-radius:var(--radius-sm) 0 0 var(--radius-sm);padding:0 12px;height:40px}
.search button{border:0;background:var(--green);color:#fff;border-radius:0 var(--radius-sm) var(--radius-sm) 0;width:46px;font-size:18px;cursor:pointer}

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media(max-width:960px){
  .grid2{grid-template-columns:1fr}
}
@media(max-width:860px){
  /* sidebar becomes an off-canvas drawer */
  .sidebar{transform:translateX(-100%);box-shadow:var(--shadow)}
  body.nav-open .sidebar{transform:translateX(0)}
  body.nav-open .sidebar-overlay{display:block}
  .app-main{margin-left:0}
  .menu-toggle{display:block}
}
@media(max-width:640px){
  body{font-size:14px}
  .app-content{padding:16px 14px 32px}
  .card{padding:16px}
  .row2{grid-template-columns:1fr}
  .page-title{font-size:20px}
  .auth-wrap{grid-template-columns:1fr}
  .auth-hero{display:none}
  .topbar-user .uname{display:none}
}