/* ============================================================
   CLASSPULSE SCHOOL SYSTEM — Design System
   Palette: Deep Navy + Warm Gold + Ivory
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --navy:       #0d1b2a;
  --navy-mid:   #16263b;
  --navy-light: #1d3354;
  --gold:       #c9a84c;
  --gold-lt:    #e6c96d;
  --ivory:      #fafbfc;
  --surface:    #ffffff;
  --surface-2:  #f4f6f9;
  --border:     #e2e6ed;
  --text:       #11181f;
  --text-sub:   #56616f;
  --text-muted: #8b94a0;
  --green:      #1a7a4a;
  --green-bg:   #e8f7ef;
  --red:        #c0392b;
  --red-bg:     #fdecea;
  --amber:      #b7710a;
  --amber-bg:   #fef3dc;
  --sidebar-w:  240px;
  --radius:     10px;
  --radius-lg:  14px;
  --shadow:     0 2px 12px rgba(13,27,42,0.08);
  --shadow-lg:  0 8px 32px rgba(13,27,42,0.16);
  --transition: all 0.18s ease;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{font-size:15px;-webkit-text-size-adjust:100%;}
body{font-family:'Inter',system-ui,sans-serif;background:var(--ivory);color:var(--text);min-height:100vh;line-height:1.5;}
a{text-decoration:none;color:inherit;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;}
img{max-width:100%;display:block;}

.app-shell{display:flex;min-height:100vh;}

.sidebar{
  width:var(--sidebar-w);background:var(--navy);
  display:flex;flex-direction:column;
  position:fixed;top:0;left:0;bottom:0;z-index:100;
  transition:transform 0.28s cubic-bezier(.4,0,.2,1);
  overflow-y:auto;
}
.sidebar-logo{padding:18px 20px 16px;border-bottom:1px solid rgba(255,255,255,0.1);display:flex;align-items:center;gap:10px;}
.sidebar-logo .brand{font-family:'Playfair Display',serif;font-size:1.05rem;color:var(--gold-lt);line-height:1.2;}
.sidebar-logo .sub{font-size:0.66rem;color:rgba(255,255,255,0.4);margin-top:1px;letter-spacing:.05em;text-transform:uppercase;}
.brand-logo-img{width:34px;height:34px;border-radius:6px;object-fit:cover;flex-shrink:0;}
.sidebar-nav{flex:1;padding:10px 0;}
.sidebar-nav a{
  display:flex;align-items:center;gap:10px;
  padding:10px 20px;color:rgba(255,255,255,0.7);
  font-size:0.875rem;font-weight:500;
  border-left:3px solid transparent;
  transition:var(--transition);
}
.sidebar-nav a:hover{background:rgba(255,255,255,0.07);color:#fff;}
.sidebar-nav a.active{background:rgba(201,168,76,0.15);color:var(--gold-lt);border-left-color:var(--gold);}
.sidebar-nav a .icon{font-size:1rem;width:20px;text-align:center;flex-shrink:0;}
.nav-section{font-size:0.63rem;color:rgba(255,255,255,0.3);text-transform:uppercase;letter-spacing:.1em;padding:14px 20px 4px;font-weight:600;}
.sidebar-footer{padding:14px 20px;border-top:1px solid rgba(255,255,255,0.1);font-size:0.78rem;color:rgba(255,255,255,0.4);}
.sidebar-footer .user-name{color:rgba(255,255,255,0.8);font-weight:600;font-size:0.85rem;}
.role-pill{display:inline-block;font-size:.62rem;font-weight:700;letter-spacing:.04em;padding:2px 8px;border-radius:10px;text-transform:uppercase;margin-top:4px;}
.role-pill.admin{background:rgba(201,168,76,0.25);color:var(--gold-lt);}
.role-pill.teacher{background:rgba(74,120,168,0.3);color:#a8c8e8;}
.role-pill.classteacher{background:rgba(122,167,122,0.3);color:#a8d8a8;}
.branding-logo{display:inline-flex;width:1.6rem;height:1.6rem;align-items:center;justify-content:center;flex-shrink:0;}
.sidebar-footer a{color:rgba(255,255,255,0.4);transition:var(--transition);}
.sidebar-footer a:hover{color:var(--gold-lt);}

.main-content{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column;min-height:100vh;}

.topbar{
  background:var(--surface);border-bottom:1px solid var(--border);
  padding:0 28px;height:58px;
  display:flex;align-items:center;justify-content:space-between;
  position:sticky;top:0;z-index:50;
  box-shadow:0 1px 4px rgba(13,27,42,0.05);
}
.topbar-left{display:flex;align-items:center;gap:12px;}
.topbar-title{font-size:1rem;font-weight:700;color:var(--navy);}
.topbar-right{display:flex;align-items:center;gap:12px;}
.hamburger{display:none;background:none;border:none;font-size:1.3rem;color:var(--navy);padding:4px;line-height:1;}

.page-body{padding:28px;flex:1;}

.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:24px;}
.stat-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;
  box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.stat-card::before{content:'';position:absolute;top:0;left:0;width:4px;height:100%;background:var(--gold);}
.stat-card.green::before{background:var(--green);}
.stat-card.red::before{background:var(--red);}
.stat-card.amber::before{background:var(--amber);}
.stat-label{font-size:0.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;font-weight:600;margin-bottom:6px;}
.stat-value{font-size:1.55rem;font-weight:700;color:var(--navy);line-height:1.1;}
.stat-value.green{color:var(--green);}
.stat-value.red{color:var(--red);}
.stat-sub{font-size:0.73rem;color:var(--text-muted);margin-top:4px;}
.stat-icon{position:absolute;right:16px;top:50%;transform:translateY(-50%);font-size:2rem;opacity:0.12;}

.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;}
.card-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;}
.card-title{font-size:0.93rem;font-weight:700;color:var(--navy);}
.card-body{padding:20px;}
.card-body.no-pad{padding:0;}

.table-wrap{overflow-x:auto;}
table{width:100%;border-collapse:collapse;font-size:0.845rem;}
thead th{background:var(--surface-2);color:var(--navy);font-weight:700;padding:11px 14px;text-align:left;font-size:0.72rem;text-transform:uppercase;letter-spacing:.05em;border-bottom:2px solid var(--border);white-space:nowrap;}
tbody td{padding:9px 14px;border-bottom:1px solid var(--border);vertical-align:middle;}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover{background:var(--surface-2);}
.score-input{width:62px;padding:6px 8px;border:1.5px solid var(--border);border-radius:6px;font-size:.85rem;text-align:center;}
.score-input:focus{outline:none;border-color:var(--navy-light);box-shadow:0 0 0 3px rgba(29,51,84,0.1);}
.score-input.saved{border-color:var(--green);background:var(--green-bg);}

.badge{display:inline-block;padding:3px 9px;border-radius:20px;font-size:0.7rem;font-weight:600;}
.badge-green{background:var(--green-bg);color:var(--green);}
.badge-red{background:var(--red-bg);color:var(--red);}
.badge-amber{background:var(--amber-bg);color:var(--amber);}
.badge-navy{background:var(--surface-2);color:var(--navy);}

.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;border-radius:7px;font-size:0.86rem;font-weight:600;border:none;cursor:pointer;transition:var(--transition);white-space:nowrap;text-decoration:none;}
.btn-primary{background:var(--navy);color:#fff;}
.btn-primary:hover{background:var(--navy-light);}
.btn-gold{background:var(--gold);color:var(--navy);}
.btn-gold:hover{background:var(--gold-lt);}
.btn-outline{background:transparent;border:1.5px solid var(--border);color:var(--text-sub);}
.btn-outline:hover{border-color:var(--navy);color:var(--navy);}
.btn-danger{background:var(--red-bg);color:var(--red);border:1px solid #f5c6c0;}
.btn-danger:hover{background:var(--red);color:#fff;}
.btn-success{background:var(--green-bg);color:var(--green);border:1px solid #b2dfc9;}
.btn-success:hover{background:var(--green);color:#fff;}
.btn-sm{padding:5px 12px;font-size:0.78rem;}
.btn:disabled{opacity:.6;cursor:not-allowed;}

.form-group{margin-bottom:16px;}
.form-label{display:block;font-size:0.8rem;font-weight:600;color:var(--text-sub);margin-bottom:6px;}
.form-control{width:100%;padding:9px 13px;border:1.5px solid var(--border);border-radius:7px;font-size:0.88rem;color:var(--text);background:var(--surface);transition:var(--transition);}
.form-control:focus{outline:none;border-color:var(--navy-light);box-shadow:0 0 0 3px rgba(29,51,84,0.1);}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.form-full{grid-column:1/-1;}

.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:18px;}
.toolbar-right{margin-left:auto;display:flex;gap:8px;align-items:center;}

.search-bar{display:flex;align-items:center;gap:8px;background:var(--surface);border:1.5px solid var(--border);border-radius:8px;padding:8px 14px;min-width:220px;}
.search-bar input{border:none;background:none;outline:none;font-size:0.87rem;color:var(--text);flex:1;font-family:inherit;}
.search-icon{color:var(--text-muted);font-size:0.9rem;}

.modal-overlay{position:fixed;inset:0;background:rgba(13,27,42,0.55);z-index:200;display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;pointer-events:none;transition:opacity 0.2s;}
.modal-overlay.open{opacity:1;pointer-events:all;}
.modal{background:var(--surface);border-radius:var(--radius-lg);width:100%;max-width:560px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg);transform:translateY(16px);transition:transform 0.22s cubic-bezier(.4,0,.2,1);}
.modal-overlay.open .modal{transform:translateY(0);}
.modal-header{padding:18px 22px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;}
.modal-title{font-size:1rem;font-weight:700;color:var(--navy);}
.modal-body{padding:22px;}
.modal-footer{padding:16px 22px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:10px;}
.btn-close{background:none;border:none;font-size:1.4rem;cursor:pointer;color:var(--text-muted);line-height:1;padding:2px 6px;}
.btn-close:hover{color:var(--text);}

.alert{padding:12px 16px;border-radius:8px;font-size:0.86rem;margin-bottom:16px;display:flex;align-items:flex-start;gap:9px;}
.alert-success{background:var(--green-bg);color:var(--green);border:1px solid #b2dfc9;}
.alert-error{background:var(--red-bg);color:var(--red);border:1px solid #f5c6c0;}
.alert-warning{background:var(--amber-bg);color:var(--amber);border:1px solid #f5d98a;}
.alert-info{background:var(--surface-2);color:var(--navy);border:1px solid var(--border);}

#toast-container{position:fixed;bottom:24px;right:24px;z-index:9999;display:flex;flex-direction:column;gap:10px;}
.toast{padding:13px 18px;border-radius:10px;font-size:0.87rem;font-weight:500;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:10px;min-width:220px;max-width:340px;animation:slideIn 0.25s ease;}
.toast-success{background:var(--green);color:#fff;}
.toast-error{background:var(--red);color:#fff;}
.toast-info{background:var(--navy);color:#fff;}
@keyframes slideIn{from{transform:translateX(50px);opacity:0;}to{transform:translateX(0);opacity:1;}}

.spinner{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,0.3);border-top-color:#fff;border-radius:50%;animation:spin 0.7s linear infinite;}
.spinner.dark{border-color:rgba(13,27,42,0.15);border-top-color:var(--navy);}
@keyframes spin{to{transform:rotate(360deg);}}

#page-loader{position:fixed;inset:0;background:var(--ivory);z-index:9000;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;}
#page-loader .brand-text{font-family:'Playfair Display',serif;font-size:1.4rem;color:var(--navy);}
#page-loader .spinner{width:36px;height:36px;border-width:4px;}

.empty-state{text-align:center;padding:48px 20px;color:var(--text-muted);}
.empty-state .es-icon{font-size:2.5rem;margin-bottom:10px;}
.empty-state p{font-size:0.88rem;}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.three-col{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px;}

.tab-bar{display:flex;border-bottom:2px solid var(--border);margin-bottom:22px;flex-wrap:wrap;}
.tab-btn{padding:10px 22px;background:none;border:none;cursor:pointer;font-size:.88rem;font-weight:600;color:var(--text-muted);border-bottom:3px solid transparent;margin-bottom:-2px;transition:var(--transition);font-family:inherit;}
.tab-btn:hover{color:var(--navy);}
.tab-btn.active{color:var(--navy);border-bottom-color:var(--gold);}
.tab-panel{display:none;}
.tab-panel.active{display:block;}

.login-page{min-height:100vh;background:linear-gradient(135deg,#0a141f 0%,#0d1b2a 50%,#0a141f 100%);display:flex;align-items:center;justify-content:center;padding:16px;}
.login-card{background:#fff;border-radius:18px;padding:44px 40px;width:100%;max-width:420px;box-shadow:0 20px 60px rgba(0,0,0,0.35);}
.login-logo{text-align:center;margin-bottom:28px;}
.login-logo-img{width:80px;height:80px;border-radius:14px;object-fit:cover;margin:0 auto 10px;display:block;box-shadow:0 6px 20px rgba(13,27,42,0.18);overflow:hidden;}
.login-logo h1{font-family:'Playfair Display',serif;font-size:1.5rem;color:var(--navy);}
.login-logo p{font-size:.82rem;color:var(--text-muted);margin-top:3px;}

.chart-box{position:relative;height:220px;}

.config-banner{background:var(--amber-bg);border:1px solid #f5d98a;border-radius:8px;padding:14px 18px;margin-bottom:20px;font-size:.87rem;color:var(--amber);display:none;}
.config-banner.show{display:flex;gap:10px;align-items:flex-start;}
.config-banner strong{color:var(--navy);}

#sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.45);z-index:99;}

.text-right{text-align:right;}
.text-center{text-align:center;}
.text-muted{color:var(--text-muted);}
.text-success{color:var(--green);}
.text-danger{color:var(--red);}
.fw-bold{font-weight:700;}
.mt-4{margin-top:24px;}
.mb-3{margin-bottom:16px;}
.d-flex{display:flex;}
.align-center{align-items:center;}
hr.divider{border:none;border-top:1px solid var(--border);margin:16px 0;}

@media(max-width:900px){ .three-col{grid-template-columns:1fr 1fr;} }
@media(max-width:768px){
  .sidebar{transform:translateX(-100%);}
  .sidebar.open{transform:translateX(0);}
  #sidebar-overlay.open{display:block;}
  .main-content{margin-left:0;}
  .hamburger{display:flex!important;align-items:center;}
  .form-grid,.two-col,.three-col{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr 1fr;}
  .page-body{padding:16px;}
  .topbar{padding:0 16px;}
}
@media(max-width:480px){
  .stats-grid{grid-template-columns:1fr;}
  .search-bar{min-width:unset;width:100%;}
  .toolbar{flex-direction:column;align-items:stretch;}
  .toolbar-right{margin-left:0;}
  .login-card{padding:30px 22px;}
}