/* =========================================================================
   Portal de Ecuaciones · 7° y 8° Básico · Liceo Osorno College
   Identidad: la balanza en equilibrio + el cuaderno/libro de clases oficial.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700;9..144,800&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root{
  --paper:      #F7F2E6;
  --paper-line: #E4D8BF;
  --card:       #FFFDF8;
  --ink:        #20233A;
  --ink-soft:   #5B5F73;
  --navy:       #2B4570;
  --navy-deep:  #1C2F4F;
  --teal:       #1F6F63;
  --teal-soft:  #DCEAE6;
  --amber:      #E2872A;
  --amber-soft: #F6E1BE;
  --red:        #C4463A;
  --red-soft:   #F6DEDB;
  --green:      #3E7C59;
  --green-soft: #DCEAE1;

  --font-display: 'Fraunces', serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 10px;
  --shadow-card: 0 10px 30px -12px rgba(32,35,58,.18);
  --shadow-lift: 0 4px 14px -4px rgba(32,35,58,.22);
}

*{ box-sizing:border-box; }

html,body{ margin:0; padding:0; }

body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.55;
  min-height:100vh;
  background-image: linear-gradient(var(--paper-line) 1px, transparent 1px);
  background-size: 100% 2.4em;
  background-position: 0 6.2em;
}

h1,h2,h3,h4{ font-family:var(--font-display); color:var(--navy-deep); margin:0; }

button{ font-family:inherit; cursor:pointer; }
input{ font-family:inherit; }

.hidden{ display:none !important; }

a{ color:var(--teal); }

/* ---------------------------- Screens layout ---------------------------- */
.screen{ min-height:100vh; display:flex; flex-direction:column; }

.topbar{
  display:flex; align-items:center; justify-content:space-between;
  gap:16px; padding:14px 28px;
  background:var(--navy-deep); color:#fff;
  box-shadow:0 3px 10px rgba(0,0,0,.15);
}
.topbar .brand{ display:flex; align-items:center; gap:12px; }
.topbar .brand img{ height:34px; width:auto; border-radius:6px; background:#fff; padding:2px; }
.topbar .brand-text strong{ font-family:var(--font-display); font-size:1.05rem; display:block; letter-spacing:.01em; }
.topbar .brand-text span{ font-size:.72rem; opacity:.75; text-transform:uppercase; letter-spacing:.08em; }
.topbar .who{ display:flex; align-items:center; gap:14px; font-size:.85rem; }
.topbar .who .role-pill{
  background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.25);
  padding:4px 12px; border-radius:20px; font-size:.75rem; letter-spacing:.03em;
}
.topbar .who button{
  background:transparent; border:1px solid rgba(255,255,255,.4); color:#fff;
  padding:7px 14px; border-radius:7px; font-size:.8rem; font-weight:600;
  transition:.15s;
}
.topbar .who button:hover{ background:rgba(255,255,255,.12); }

.content{ flex:1; width:100%; max-width:1080px; margin:0 auto; padding:36px 28px 80px; }

/* ---------------------------- LOGIN SCREEN ---------------------------- */
#screen-login{
  align-items:center; justify-content:center; padding:32px 16px;
  background:
    radial-gradient(1200px 500px at 50% -10%, rgba(31,111,99,.08), transparent),
    var(--paper);
}

.login-shell{ width:100%; max-width:460px; }

.login-mark{ display:flex; flex-direction:column; align-items:center; gap:10px; margin-bottom:22px; text-align:center; }
.login-mark img.school-logo{ height:56px; width:auto; }
.login-mark .scale-wrap{ width:92px; height:76px; }
.login-mark h1{ font-size:1.5rem; margin-top:4px; }
.login-mark .dept{
  font-size:.72rem; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-soft);
  font-weight:600;
}
.login-mark .subtitle{ font-size:.9rem; color:var(--ink-soft); max-width:360px; margin-top:2px; }

.login-card{
  background:var(--card); border:1px solid var(--paper-line); border-radius:14px;
  box-shadow:var(--shadow-card); padding:26px 26px 22px; position:relative; overflow:hidden;
}
.login-card::before{
  content:''; position:absolute; top:0; left:0; right:0; height:6px;
  background:linear-gradient(90deg, var(--navy), var(--teal), var(--amber));
}

.role-tabs{ display:flex; gap:8px; margin-bottom:20px; background:var(--paper); border:1px solid var(--paper-line); border-radius:10px; padding:4px; }
.role-tabs button{
  flex:1; border:none; background:transparent; padding:10px 8px; border-radius:8px;
  font-weight:600; font-size:.86rem; color:var(--ink-soft); transition:.15s;
}
.role-tabs button.active{ background:var(--navy); color:#fff; box-shadow:var(--shadow-lift); }

.field{ margin-bottom:14px; position:relative; }
.field label{ display:block; font-size:.78rem; font-weight:600; color:var(--ink-soft); margin-bottom:5px; letter-spacing:.01em; }
.field input, .field select{
  width:100%; padding:11px 12px; border:1.5px solid var(--paper-line); border-radius:8px;
  background:#fff; font-size:.94rem; color:var(--ink); transition:.15s;
}
.field input:focus, .field select:focus{ outline:none; border-color:var(--teal); box-shadow:0 0 0 3px var(--teal-soft); }

.autocomplete-list{
  position:absolute; z-index:20; top:100%; left:0; right:0; background:#fff;
  border:1.5px solid var(--paper-line); border-top:none; border-radius:0 0 8px 8px;
  max-height:220px; overflow-y:auto; box-shadow:var(--shadow-lift); display:none;
}
.autocomplete-list.show{ display:block; }
.autocomplete-list div{ padding:9px 12px; font-size:.86rem; cursor:pointer; border-bottom:1px solid var(--paper-line); }
.autocomplete-list div:last-child{ border-bottom:none; }
.autocomplete-list div:hover, .autocomplete-list div.hi{ background:var(--teal-soft); }
.autocomplete-list .ac-meta{ float:right; color:var(--ink-soft); font-size:.76rem; font-family:var(--font-mono); }

.form-error{
  display:none; background:var(--red-soft); color:var(--red); border:1px solid #e8b9b3;
  padding:9px 12px; border-radius:8px; font-size:.82rem; margin-bottom:12px; font-weight:600;
}
.form-error.show{ display:block; }

.btn{
  border:none; border-radius:9px; font-weight:700; padding:12px 18px; font-size:.92rem;
  transition:transform .12s, box-shadow .12s; display:inline-flex; align-items:center; justify-content:center; gap:8px;
}
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--navy); color:#fff; box-shadow:var(--shadow-lift); }
.btn-primary:hover{ background:var(--navy-deep); }
.btn-primary:disabled{ opacity:.5; cursor:not-allowed; }
.btn-teal{ background:var(--teal); color:#fff; }
.btn-teal:hover{ filter:brightness(1.08); }
.btn-ghost{ background:transparent; color:var(--navy); border:1.5px solid var(--paper-line); }
.btn-ghost:hover{ background:var(--paper); }
.btn-block{ width:100%; }

.login-foot{ text-align:center; margin-top:16px; font-size:.78rem; color:var(--ink-soft); }

/* ---------------------------- Signature: balanza SVG ---------------------------- */
.balance-svg .beam{ transform-origin:60px 30px; transition: transform .6s cubic-bezier(.34,1.4,.5,1); }
.balance-svg.tip-left .beam{ transform:rotate(-7deg); }
.balance-svg.tip-right .beam{ transform:rotate(7deg); }
.balance-svg.balanced .beam{ transform:rotate(0deg); }
.balance-svg .pan{ transition: transform .6s cubic-bezier(.34,1.4,.5,1); }
.balance-svg.tip-left .pan-left{ transform:translateY(9px); }
.balance-svg.tip-left .pan-right{ transform:translateY(-9px); }
.balance-svg.tip-right .pan-right{ transform:translateY(9px); }
.balance-svg.tip-right .pan-left{ transform:translateY(-9px); }

/* ---------------------------- HOME / PURPOSE SCREEN ---------------------------- */
.memo{
  background:var(--card); border:1px solid var(--paper-line); border-radius:var(--radius);
  box-shadow:var(--shadow-card); padding:30px 32px; margin-bottom:30px; position:relative;
}
.memo::before{
  content:'ACTA'; position:absolute; top:18px; right:22px; font-family:var(--font-mono);
  font-size:.68rem; letter-spacing:.14em; color:var(--paper-line); font-weight:700;
  border:1.5px solid var(--paper-line); padding:3px 8px; border-radius:5px; transform:rotate(3deg);
}
.memo .eyebrow{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.12em; text-transform:uppercase;
  color:var(--teal); font-weight:700; margin-bottom:8px;
}
.memo h2{ font-size:1.65rem; margin-bottom:10px; max-width:640px; }
.memo p{ color:var(--ink-soft); max-width:640px; font-size:.95rem; }
.memo .signers{ margin-top:16px; font-size:.84rem; color:var(--ink-soft); border-top:1px dashed var(--paper-line); padding-top:12px; }
.memo .signers strong{ color:var(--navy); }

.fichas-grid{ display:grid; grid-template-columns:1fr 1fr; gap:22px; margin-bottom:30px; }
@media (max-width:720px){ .fichas-grid{ grid-template-columns:1fr; } }

.ficha-card{
  background:var(--card); border:1.5px solid var(--paper-line); border-radius:var(--radius);
  padding:24px 24px 22px; box-shadow:var(--shadow-card); position:relative; overflow:hidden;
  display:flex; flex-direction:column; gap:12px; transition:transform .15s, box-shadow .15s;
}
.ficha-card:hover{ transform:translateY(-3px); box-shadow:0 16px 34px -14px rgba(32,35,58,.26); }
.ficha-card .tab{
  position:absolute; top:0; left:24px; background:var(--amber); color:#fff; font-family:var(--font-mono);
  font-size:.7rem; font-weight:700; letter-spacing:.06em; padding:5px 12px; border-radius:0 0 6px 6px;
}
.ficha-card.lvl-8 .tab{ background:var(--teal); }
.ficha-card h3{ font-size:1.25rem; margin-top:14px; }
.ficha-card p{ color:var(--ink-soft); font-size:.86rem; margin:0; }
.ficha-card .topics{ display:flex; flex-wrap:wrap; gap:6px; margin-top:2px; }
.ficha-card .topics span{
  font-size:.72rem; background:var(--paper); border:1px solid var(--paper-line); border-radius:20px;
  padding:3px 10px; color:var(--ink-soft); font-weight:600;
}
.ficha-card .go{ margin-top:6px; align-self:flex-start; }

.helper-note{
  background:var(--amber-soft); border:1px solid #e9c98a; border-radius:9px; padding:14px 16px;
  font-size:.84rem; color:#6b4a12; display:flex; gap:10px; align-items:flex-start;
}

/* ---------------------------- TEACHER DASHBOARD ---------------------------- */
.stamp-row{ display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-bottom:26px; }
@media (max-width:820px){ .stamp-row{ grid-template-columns:1fr 1fr; } }
.stamp{
  background:var(--card); border:2px dashed var(--paper-line); border-radius:50%;
  aspect-ratio:1/1; display:flex; flex-direction:column; align-items:center; justify-content:center;
  text-align:center; padding:10px; position:relative;
}
.stamp .big{ font-family:var(--font-display); font-size:1.9rem; font-weight:700; color:var(--navy); line-height:1; }
.stamp .lab{ font-size:.68rem; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.05em; margin-top:4px; font-weight:600; }
.stamp.teal .big{ color:var(--teal); }
.stamp.amber .big{ color:var(--amber); }

.panel{
  background:var(--card); border:1px solid var(--paper-line); border-radius:var(--radius);
  box-shadow:var(--shadow-card); padding:24px 26px; margin-bottom:24px;
}
.panel h3{ font-size:1.05rem; margin-bottom:14px; display:flex; align-items:center; gap:8px; }
.panel-sub{ color:var(--ink-soft); font-size:.85rem; margin-bottom:16px; }

.toolbar-row{ display:flex; flex-wrap:wrap; gap:10px; align-items:center; margin-bottom:16px; }
.toolbar-row select, .toolbar-row input[type=text]{
  padding:8px 10px; border:1.5px solid var(--paper-line); border-radius:7px; font-size:.85rem; background:#fff;
}

.ledger-wrap{ overflow-x:auto; border:1px solid var(--paper-line); border-radius:8px; }
table.ledger{ width:100%; border-collapse:collapse; font-size:.85rem; }
table.ledger thead th{
  background:var(--navy-deep); color:#fff; text-align:left; padding:10px 12px; font-weight:600;
  font-size:.76rem; text-transform:uppercase; letter-spacing:.04em; position:sticky; top:0;
}
table.ledger tbody td{ padding:9px 12px; border-bottom:1px solid var(--paper-line); }
table.ledger tbody tr:nth-child(even){ background:#FCFAF3; }
table.ledger tbody tr:hover{ background:var(--teal-soft); }
.pct-bar{ display:flex; align-items:center; gap:8px; }
.pct-bar .track{ flex:1; height:7px; border-radius:5px; background:var(--paper-line); min-width:60px; overflow:hidden; }
.pct-bar .fill{ height:100%; background:var(--teal); }
.pct-bar.low .fill{ background:var(--red); }
.pct-bar.mid .fill{ background:var(--amber); }
.pct-bar span{ font-family:var(--font-mono); font-size:.78rem; font-weight:700; min-width:34px; text-align:right; }

.empty-state{ text-align:center; padding:36px 20px; color:var(--ink-soft); }
.empty-state .icon{ font-size:2rem; margin-bottom:10px; }

.config-toggle{ font-size:.82rem; color:var(--teal); font-weight:600; background:none; border:none; padding:0; text-decoration:underline; }
.config-box{ margin-top:16px; padding-top:16px; border-top:1px dashed var(--paper-line); }
.code-block{
  background:#fff; border:1px solid var(--paper-line); border-radius:8px; padding:14px 16px;
  font-family:var(--font-mono); font-size:.76rem; overflow-x:auto; white-space:pre; color:var(--ink); max-height:260px;
}
.status-msg{ font-size:.82rem; margin-top:8px; font-weight:600; }
.status-msg.ok{ color:var(--green); }
.status-msg.err{ color:var(--red); }
.status-msg.wait{ color:var(--ink-soft); }

.spinner{
  width:16px; height:16px; border:2.5px solid var(--paper-line); border-top-color:var(--teal);
  border-radius:50%; animation:spin .7s linear infinite; display:inline-block;
}
@keyframes spin{ to{ transform:rotate(360deg); } }

footer.portal-foot{ text-align:center; padding:18px; color:var(--ink-soft); font-size:.78rem; }