/* ============================================================
   English Today - Admin / Teacher panel (Propiedad de Inteva)
   Flat design. SIN gradientes.
   ============================================================ */
:root{
  --blue:#0055FF; --blue-dark:#0042CC; --blue-soft:#E8EEFF;
  --orange:#FF6B35; --orange-soft:#FFEDE5;
  --lime:#34B233; --lime-soft:#E4F6E0;
  --purple:#7C5CFC; --purple-soft:#EFEAFF;
  --pink:#FF4D8D; --pink-soft:#FFE2EC;
  --danger:#E23D3D; --danger-soft:#FBE4E4;
  --warn:#E8A400; --warn-soft:#FCF1D6;
  --ink:#0F1B33; --muted:#5B6478; --bg:#F4F6FB; --card:#FFFFFF; --line:#E6E9F2;
  --radius:16px; --shadow:0 6px 22px rgba(15,27,51,.07); --shadow-sm:0 2px 10px rgba(15,27,51,.05);
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
  --sidebar:260px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;line-height:1.5}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
small{font-size:12px}
.muted{color:var(--muted)}
.link{color:var(--blue);font-weight:600;font-size:13px}

/* Boot */
.boot{height:100vh;display:flex;align-items:center;justify-content:center}
.boot-spin,.loading svg{width:34px;height:34px;border:none;animation:spin 1s linear infinite}
.loading{display:flex;gap:10px;align-items:center;color:var(--muted);padding:40px;justify-content:center}
.loading svg{width:22px;height:22px;color:var(--blue)}
.boot-spin{border:3px solid var(--blue-soft);border-top-color:var(--blue);border-radius:50%}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Botones ---------- */
.btn{display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:14px;padding:11px 18px;border-radius:11px;border:1.5px solid transparent;cursor:pointer;font-family:inherit;transition:background .15s,border .15s,transform .1s}
.btn svg{width:17px;height:17px}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-soft{background:var(--blue-soft);color:var(--blue)}
.btn-soft:hover{background:#dbe6ff}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#c93333}
.btn-block{width:100%;justify-content:center}
.btn-sm{padding:8px 13px;font-size:13px;border-radius:9px}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:9px;border:1.5px solid var(--line);background:#fff;cursor:pointer;color:var(--muted);transition:.15s}
.icon-btn:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-soft)}
.icon-btn svg{width:17px;height:17px}

/* ---------- LOGIN ---------- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:var(--bg)}
.login-card{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);width:100%;max-width:420px;padding:34px}
.login-brand{display:flex;align-items:center;gap:12px;margin-bottom:22px}
.login-brand img{width:46px;height:46px;object-fit:contain}
.login-brand b{display:block;font-size:17px}
.login-brand span{font-size:12px;color:var(--muted)}
.login-card h1{font-size:24px;margin-bottom:4px}
.login-card .muted{font-size:13px;margin-bottom:18px}
.login-card form label{display:block;font-size:13px;font-weight:600;color:#33405a;margin-bottom:14px}
.login-card form input{width:100%;margin-top:6px;padding:12px 14px;border:1.5px solid var(--line);border-radius:11px;font-family:inherit;font-size:14px}
.login-card form input:focus{outline:none;border-color:var(--blue)}
.alert{background:var(--danger-soft);color:var(--danger);padding:10px 14px;border-radius:10px;font-size:13px;margin-bottom:14px;font-weight:600}
.login-foot{display:flex;align-items:center;gap:8px;justify-content:center;margin-top:22px;color:var(--muted);font-size:12px;font-weight:600}
.login-foot img{height:16px}
.lang-mini{display:flex;gap:6px;justify-content:center;margin-top:14px}
.lang-mini button{border:1.5px solid var(--line);background:#fff;border-radius:8px;padding:5px 12px;font-weight:700;font-size:12px;cursor:pointer;color:var(--muted);font-family:inherit}
.lang-mini button.active{background:var(--blue);color:#fff;border-color:var(--blue)}

/* ---------- LAYOUT ---------- */
.layout{display:grid;grid-template-columns:var(--sidebar) 1fr;min-height:100vh}
.layout.collapsed{--sidebar:78px}
.sidebar{background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;padding:18px 14px;overflow:hidden}
.side-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;padding:6px 8px 18px}
.side-brand img{width:34px;height:34px;object-fit:contain;flex:0 0 auto}
.collapsed .side-brand span,.collapsed .ni-label,.collapsed .side-promo,.collapsed .side-collapse span{display:none}
.side-nav{display:flex;flex-direction:column;gap:3px;flex:1;overflow-y:auto}
.nav-item{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:11px;color:#41506e;font-weight:600;font-size:14px;cursor:pointer;transition:.15s}
.nav-item:hover{background:var(--bg)}
.nav-item.active{background:var(--blue-soft);color:var(--blue)}
.ni-icon{display:flex;flex:0 0 auto}
.ni-icon svg{width:20px;height:20px}
.collapsed .nav-item{justify-content:center}
.side-promo{background:var(--blue-soft);border-radius:16px;padding:14px;text-align:center;margin-top:12px}
.side-promo img{width:84px;margin:0 auto 8px}
.side-promo b{display:block;font-size:14px;margin-bottom:4px}
.side-promo span{display:block;font-size:12px;color:var(--muted);margin-bottom:10px}
.side-collapse{display:flex;align-items:center;gap:10px;background:none;border:none;cursor:pointer;color:var(--muted);font-weight:600;font-size:13px;padding:12px 8px;margin-top:8px;font-family:inherit}
.side-collapse svg{width:18px;height:18px;transform:rotate(180deg)}
.collapsed .side-collapse svg{transform:rotate(0)}

.main{display:flex;flex-direction:column;min-width:0}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:14px;background:rgba(244,246,251,.9);backdrop-filter:blur(8px);padding:14px 26px;border-bottom:1px solid var(--line)}
.search-box{position:relative;flex:1;max-width:520px;display:flex;align-items:center;gap:10px;background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:0 14px}
.search-box svg{width:18px;height:18px;color:var(--muted);flex:0 0 auto}
.search-box input{flex:1;border:none;background:none;padding:11px 0;font-family:inherit;font-size:14px;outline:none}
.search-results{position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:8px;display:none;max-height:420px;overflow-y:auto;z-index:30}
.search-results.open{display:block}
.sr-group{margin-bottom:6px}
.sr-title{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);font-weight:700;padding:8px 10px 4px}
.sr-item{display:flex;align-items:center;gap:11px;padding:9px 10px;border-radius:10px;cursor:pointer;font-weight:600;font-size:14px}
.sr-item:hover{background:var(--blue-soft);color:var(--blue)}
.sr-item small{display:block;font-weight:500;color:var(--muted);font-size:12px}
.sr-ic{display:flex;color:var(--muted)}
.sr-item:hover .sr-ic{color:var(--blue)}
.sr-ic svg{width:18px;height:18px}
.sr-empty{padding:14px;text-align:center;color:var(--muted);font-size:13px}
.top-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.topbar-lang button{padding:6px 9px;font-size:11px}
.user-chip{display:flex;align-items:center;gap:9px;cursor:pointer;padding:5px 8px;border-radius:11px}
.user-chip:hover{background:#fff}
.avatar{width:38px;height:38px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;flex:0 0 auto}
.uc-meta b{display:block;font-size:13px}
.uc-meta span{font-size:11px;color:var(--muted)}
.only-mobile{display:none}

.content{padding:26px;flex:1}

/* ---------- Page head ---------- */
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.page-head h1{font-size:26px;font-weight:800;letter-spacing:-.4px}
.page-head .muted{font-size:14px;margin-top:2px}
.page-actions{display:flex;gap:10px}

/* ---------- Stat cards ---------- */
.stat-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:flex;gap:14px;align-items:center;box-shadow:var(--shadow-sm)}
.stat-card .ic{width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.stat-card .ic svg{width:24px;height:24px}
.sc-body{display:flex;flex-direction:column}
.sc-label{font-size:13px;color:var(--muted);font-weight:600}
.sc-value{font-size:24px;font-weight:800;line-height:1.2}
.sc-sub{font-size:12px;color:var(--lime);font-weight:700}
.ic.blue{background:var(--blue-soft);color:var(--blue)}
.ic.lime{background:var(--lime-soft);color:var(--lime)}
.ic.orange{background:var(--orange-soft);color:var(--orange)}
.ic.purple{background:var(--purple-soft);color:var(--purple)}
.ic.pink{background:var(--pink-soft);color:var(--pink)}
.ic.danger{background:var(--danger-soft);color:var(--danger)}

.mini-cards{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-bottom:20px}
.mini-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;display:flex;gap:11px;align-items:center;box-shadow:var(--shadow-sm)}
.mini-card .ic{width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.mini-card .ic svg{width:20px;height:20px}
.mini-card b{display:block;font-size:19px;font-weight:800}
.mini-card span{font-size:11px;color:var(--muted)}

/* ---------- Panels & grids ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow-sm);margin-bottom:18px}
.panel.no-pad{padding:0;overflow:hidden}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.panel-head h3{font-size:16px;font-weight:700}

.banner-soft{background:var(--blue-soft);border-radius:var(--radius);padding:16px 18px;display:flex;align-items:center;gap:14px}
.banner-soft svg{width:26px;height:26px;color:var(--blue);flex:0 0 auto}
.banner-soft b{font-size:14px}
.banner-soft a{margin-left:auto}

/* ---------- Guía de uso ---------- */
.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:18px 0}
.guide-card{margin-bottom:0;display:flex;flex-direction:column}
.guide-head{display:flex;align-items:center;gap:13px;margin-bottom:10px}
.guide-head .ic{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.guide-head .ic svg{width:23px;height:23px}
.guide-head h3{font-size:16px;font-weight:800;line-height:1.15}
.guide-head small{font-size:11.5px}
.guide-intro{color:var(--muted);font-size:13.5px;margin-bottom:10px;line-height:1.5}
.guide-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.guide-list li{position:relative;padding-left:22px;font-size:13.5px;line-height:1.5}
.guide-list li::before{content:"";position:absolute;left:4px;top:8px;width:7px;height:7px;border-radius:50%;background:var(--blue)}

/* ---------- Tables ---------- */
.table{width:100%;border-collapse:collapse;font-size:14px}
.table thead th{text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);font-weight:700;padding:13px 16px;border-bottom:1px solid var(--line);background:#fafbff}
.table tbody td{padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:middle}
.table tbody tr:last-child td{border-bottom:none}
.table tbody tr:hover{background:#fafbff}
.no-pad .table thead th:first-child,.no-pad .table tbody td:first-child{padding-left:18px}
.row-actions{display:flex;gap:6px;justify-content:flex-end}
.table-wrap{overflow-x:auto}

/* badges */
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:11px;font-weight:700;background:var(--bg);color:var(--muted);text-transform:capitalize}
.badge.ok{background:var(--lime-soft);color:var(--lime)}
.badge.danger{background:var(--danger-soft);color:var(--danger)}
.badge.warn{background:var(--warn-soft);color:var(--warn)}
.badge.muted{background:var(--bg);color:var(--muted)}

/* filters */
.filters{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.input{padding:10px 13px;border:1.5px solid var(--line);border-radius:10px;font-family:inherit;font-size:14px;background:#fff}
.input:focus{outline:none;border-color:var(--blue)}
.input.sm{padding:7px 10px;width:90px}
#uq,#sq{min-width:240px}

/* cards grid (courses, classes, plans) */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.course-card,.plan-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow-sm);position:relative}
.plan-card.featured{border-color:var(--blue);border-width:2px}
.cc-badge{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;margin-bottom:12px}
.cc-badge svg{width:24px;height:24px;color:#fff}
.course-card h3,.plan-card h3{font-size:17px;margin-bottom:4px}
.course-card p{font-size:13px}
.cc-actions{display:flex;gap:8px;margin-top:14px;align-items:center}
.plan-price{font-size:26px;font-weight:800;margin:6px 0}
.plan-price small{font-size:13px;color:var(--muted);font-weight:600}

/* skills + class rows (teacher) */
.skills-list{display:flex;flex-direction:column;gap:13px}
.skill-row{display:flex;align-items:center;gap:12px;font-size:13px;font-weight:600}
.skill-row span{width:90px;flex:0 0 auto}
.skill-row .bar{flex:1;height:9px;background:var(--bg);border-radius:6px;overflow:hidden}
.skill-row .bar i{display:block;height:100%;border-radius:6px}
.skill-row b{width:40px;text-align:right}
.class-row{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px solid var(--line)}
.class-row:last-child{border-bottom:none}
.class-badge{width:40px;height:40px;border-radius:11px;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;flex:0 0 auto}
.class-row>div{flex:1}
.class-row small{display:block}
.cr-prog{color:var(--blue)}

.list-row{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.list-row:last-child{border-bottom:none}
.list-row>div{flex:1}
.list-row small{display:block}
.lr-ic{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.lr-ic svg{width:18px;height:18px}
.lr-ic.blue{background:var(--blue-soft);color:var(--blue)}
.lr-ic.lime{background:var(--lime-soft);color:var(--lime)}
.lr-ic.muted{background:var(--bg);color:var(--muted)}

.empty{padding:26px;text-align:center;color:var(--muted);font-size:14px}
.error-box{padding:40px;text-align:center;color:var(--danger)}
.error-box svg{width:40px;height:40px;margin:0 auto 10px}

/* chart */
.chart{width:100%;height:auto}
.chart-label{font-size:9px;fill:var(--muted)}

/* ---------- Modal ---------- */
.modal-overlay{position:fixed;inset:0;background:rgba(15,27,51,.45);display:flex;align-items:center;justify-content:center;padding:20px;z-index:100;opacity:0;transition:opacity .2s}
.modal-overlay.in{opacity:1}
.modal{background:#fff;border-radius:20px;width:100%;max-width:520px;max-height:90vh;overflow:hidden;display:flex;flex-direction:column;transform:translateY(14px) scale(.98);transition:transform .22s}
.modal-overlay.in .modal{transform:none}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}
.modal-head h3{font-size:17px}
.modal-body{padding:20px;overflow-y:auto}
.modal-foot{display:flex;gap:10px;justify-content:flex-end;padding:16px 20px;border-top:1px solid var(--line)}
.form{display:flex;flex-direction:column;gap:13px}
.form label{display:block;font-size:13px;font-weight:600;color:#33405a}
.form .input,.form input,.form select,.form textarea{width:100%;margin-top:6px}
.form input[type=color]{height:42px;padding:4px;cursor:pointer}
.form-foot{display:flex;justify-content:flex-end;margin-top:6px}

/* settings */
.settings-grid{display:flex;flex-direction:column;gap:4px}
.setting-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px solid var(--line)}
.setting-row:last-child{border-bottom:none}
.setting-row b{font-size:14px;display:block}
.setting-row small{display:block;color:var(--muted)}
.setting-text{display:flex;flex-direction:column;padding:10px 0;font-size:13px;font-weight:600}
.switch{position:relative;width:46px;height:26px;flex:0 0 auto}
.switch input{opacity:0;width:0;height:0}
.switch span{position:absolute;inset:0;background:#cdd5e6;border-radius:999px;cursor:pointer;transition:.2s}
.switch span::before{content:"";position:absolute;width:20px;height:20px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s}
.switch input:checked+span{background:var(--lime)}
.switch input:checked+span::before{transform:translateX(20px)}

/* grade */
.grade-list{display:flex;flex-direction:column;gap:10px}
.grade-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding:12px;border:1px solid var(--line);border-radius:12px}
.gr-text{font-size:13px;color:var(--muted);margin-top:6px}
.gr-actions{display:flex;gap:8px;align-items:flex-start;flex:0 0 auto}
.student-detail h4{margin:16px 0 8px;font-size:15px}

/* tree */
.tree-unit{border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:10px}
.tu-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.tree-lesson{display:flex;align-items:center;gap:10px;padding:7px 0;font-size:14px;border-top:1px solid var(--line)}
.tree-lesson svg{width:16px;height:16px;color:var(--muted)}
.tree-lesson small{margin-left:auto}

/* toast */
.toast-wrap{position:fixed;bottom:22px;right:22px;display:flex;flex-direction:column;gap:10px;z-index:200}
.toast{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:12px;padding:12px 16px;box-shadow:var(--shadow);font-size:14px;font-weight:600;min-width:240px;max-width:360px;transform:translateX(120%);transition:transform .3s}
.toast.in{transform:none}
.toast svg{width:18px;height:18px;flex:0 0 auto}
.toast.success{border-left-color:var(--lime)}.toast.success svg{color:var(--lime)}
.toast.error{border-left-color:var(--danger)}.toast.error svg{color:var(--danger)}
.toast.info svg{color:var(--blue)}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .stat-cards{grid-template-columns:repeat(2,1fr)}
  .mini-cards{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .guide-grid{grid-template-columns:1fr}
}
@media(max-width:760px){
  .layout{grid-template-columns:1fr}
  .sidebar{position:fixed;left:0;top:0;z-index:60;transform:translateX(-100%);transition:transform .25s;width:var(--sidebar)}
  .layout.nav-open .sidebar{transform:none;box-shadow:var(--shadow)}
  .only-mobile{display:inline-flex}
  .content{padding:18px}
  .stat-cards{grid-template-columns:1fr}
  .uc-meta{display:none}
  .topbar-lang{display:none}
}