/* ===========================================================
   Razred — vizualna identiteta: šolska tabla + zvezek papir.
   Barve: globoko zelena tabla, kredno bela, papir, rdeč "popravljalni" poudarek.
   =========================================================== */

:root{
  --board: #1E3A2F;
  --board-dark: #16281F;
  --chalk: #F1EFE3;
  --paper: #F6F1E4;
  --paper-line: #E4DBC4;
  --ink: #26241C;
  --ink-soft: #5B5648;
  --pen-red: #B23A32;
  --chalk-yellow: #E8C468;
  --ink-blue: #2B4570;
  --radius: 10px;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --hand: "Caveat", cursive;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- TABLA (hero) ---------- */
.board{
  position:relative;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(255,255,255,0.05), transparent 60%),
    var(--board);
  color: var(--chalk);
  padding: 56px 24px 64px;
  overflow:hidden;
  border-bottom: 10px solid var(--board-dark);
}
.board-inner{ max-width: 760px; margin: 0 auto; text-align:left; }
.board-eyebrow{
  font-family: var(--hand);
  font-size: 1.4rem;
  color: var(--chalk-yellow);
  margin: 0 0 4px;
  transform: rotate(-1.5deg);
}
.board-title{
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  margin: 0 0 14px;
  position: relative;
  display:inline-block;
}
.chalk-underline{
  position:absolute; left:0; right:-6%; bottom:-6px; height:10px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='14'%3E%3Cpath d='M2 8 Q40 2 80 8 T160 8 T240 8 T300 6' stroke='%23E8C468' stroke-width='4' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") repeat-x;
  background-size: 220px 14px;
  opacity:.9;
}
.board-sub{
  font-size: 1.08rem;
  line-height:1.55;
  max-width: 56ch;
  color: rgba(241,239,227,0.86);
  margin:0;
}
.chalk-dust{
  position:absolute; inset:0; pointer-events:none; opacity:.5;
  background-image: radial-gradient(rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 3px 3px;
}

/* ---------- IZBIRNI PANEL ---------- */
.setup{ flex:1; display:flex; justify-content:center; padding: 40px 20px 64px; }
.notebook-page{
  background: var(--paper);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 #fff inset, 0 14px 30px -18px rgba(20,30,20,0.35);
  width:100%;
}
.setup-card{
  max-width: 620px;
  padding: 34px 32px 30px;
  display:flex;
  flex-direction:column;
  gap: 18px;
  background-image: repeating-linear-gradient(
    to bottom, transparent, transparent 43px, var(--paper-line) 44px
  );
  background-position-y: 90px;
}
.setup-step{ display:flex; flex-direction:column; gap:6px; }
.setup-label{
  font-size: .82rem;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: .01em;
}
.select{
  font-family: var(--sans);
  font-size: 1rem;
  padding: 11px 12px;
  border-radius: 7px;
  border: 1.5px solid var(--paper-line);
  background: #fff;
  color: var(--ink);
}
.select:focus, textarea:focus{ outline: 2px solid var(--ink-blue); outline-offset: 1px; }

.btn{
  font-family: var(--sans);
  font-weight: 600;
  font-size: .96rem;
  padding: 12px 20px;
  border-radius: 8px;
  border: none;
  cursor:pointer;
  transition: transform .12s ease, box-shadow .12s ease, background .15s ease;
}
.btn:active{ transform: translateY(1px); }
.btn-primary{ background: var(--board); color: var(--chalk); }
.btn-primary:hover{ background: var(--board-dark); }
.btn-secondary{ background: #fff; color: var(--ink); border:1.5px solid var(--paper-line); }
.btn-secondary:hover{ border-color: var(--ink-soft); }
.btn-ghost{ background:transparent; color: var(--ink-soft); padding-left:0; }
.btn-ghost:hover{ color: var(--ink); }
.btn-start{ margin-top: 6px; align-self:flex-start; }

/* ---------- UČILNICA ---------- */
.classroom{
  flex:1;
  display:grid;
  grid-template-columns: 270px 1fr;
  min-height: 0;
}
.sidebar{
  background: var(--board);
  color: var(--chalk);
  padding: 22px 20px 24px;
  display:flex;
  flex-direction:column;
  gap: 22px;
  border-right: 6px solid var(--board-dark);
}
.sidebar-block{ display:flex; flex-direction:column; gap:8px; }
.sidebar-kicker{ font-size:.74rem; color: rgba(241,239,227,.6); margin:0; text-transform:none; letter-spacing:.02em; }
.sidebar-subject{ font-family: var(--serif); font-size:1.3rem; font-weight:600; margin:0; }
.sidebar-meta{ font-size:.84rem; color: rgba(241,239,227,.75); margin:0; }
.meter{ height:8px; border-radius:6px; background: rgba(255,255,255,.14); overflow:hidden; }
.meter-fill{ height:100%; width:10%; background: var(--chalk-yellow); border-radius:6px; transition: width .4s ease; }
.mode-list{ display:flex; flex-direction:column; gap:6px; }
.mode-btn{
  text-align:left;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  color: var(--chalk);
  padding: 9px 10px;
  border-radius:7px;
  font-family: var(--sans);
  font-size:.86rem;
  cursor:pointer;
}
.mode-btn:hover{ background: rgba(255,255,255,.12); }
.mode-btn.active{ background: var(--chalk-yellow); color: var(--board-dark); border-color: transparent; font-weight:600; }
.sidebar-actions{ margin-top:auto; }

.chat-wrap{ display:flex; flex-direction:column; min-height:0; }
.chat-scroll{
  flex:1;
  overflow-y:auto;
  padding: 26px clamp(16px, 4vw, 60px) 10px;
  display:flex;
  flex-direction:column;
  gap: 16px;
}
.msg{
  max-width: 720px;
  padding: 13px 16px;
  border-radius: 10px;
  line-height:1.6;
  font-size: .98rem;
}
.msg p{ margin: 0 0 .6em; }
.msg p:last-child{ margin-bottom:0; }
.msg.ai{
  align-self:flex-start;
  background:#fff;
  border:1px solid var(--paper-line);
  border-top-left-radius:2px;
}
.msg.user{
  align-self:flex-end;
  background: var(--ink-blue);
  color: #fff;
  border-top-right-radius:2px;
}
.msg.system-note{
  align-self:center;
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--hand);
  font-size: 1.15rem;
  padding: 2px 6px;
}
.msg.ai.thinking{ color: var(--ink-soft); font-style:italic; }

.composer{
  display:flex;
  gap: 10px;
  padding: 14px clamp(16px, 4vw, 60px) 20px;
  border-top: 1px solid var(--paper-line);
  background: var(--paper);
}
.composer-input{
  flex:1;
  resize:none;
  font-family: var(--sans);
  font-size: 1rem;
  padding: 12px 14px;
  border-radius: 9px;
  border: 1.5px solid var(--paper-line);
  background:#fff;
  max-height: 160px;
}
.composer-send{ align-self:flex-end; }

.site-footer{
  text-align:center;
  font-size: .78rem;
  color: var(--ink-soft);
  padding: 14px;
  border-top: 1px solid var(--paper-line);
}

/* ---------- odzivnost ---------- */
@media (max-width: 840px){
  .classroom{ grid-template-columns: 1fr; }
  .sidebar{
    flex-direction:row;
    flex-wrap:wrap;
    align-items:center;
    border-right:none;
    border-bottom: 6px solid var(--board-dark);
    gap: 14px;
  }
  .sidebar-block{ flex: 1 1 160px; }
  .sidebar-actions{ margin-top:0; }
  .mode-list{ flex-direction:row; flex-wrap:wrap; }
}
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .btn, .meter-fill{ transition:none; }
}