/* ITG Lingua — arkusz główny.
   Paleta „brytyjsko-książkowa": granat, głęboka czerwień, musztarda, papierowy krem. */
:root {
  --navy: #23344d;
  --navy-700: #2f4b7c;
  --red: #a4243b;
  --mustard: #bc8a00;
  --green: #4f772d;
  --paper: #f6f1e7;
  --paper-2: #efe7d6;
  --ink: #22201c;
  --ink-soft: #5a544b;
  --line: #ddd2bd;
  --radius: 6px;
  --shadow: 0 2px 10px rgba(35, 52, 77, .08);
  --font-head: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --font-body: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}
h1, h2, h3 { font-family: var(--font-head); line-height: 1.2; }
a { color: var(--navy-700); }
img { max-width: 100%; height: auto; }

/* ---------- przyciski ---------- */
.btn {
  display: inline-block;
  background: var(--navy);
  color: #fff;
  border: 1px solid var(--navy);
  padding: .5rem .9rem;
  border-radius: var(--radius);
  font: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s ease, transform .05s ease;
}
.btn:hover { background: var(--navy-700); }
.btn:active { transform: translateY(1px); }
.btn--ghost { background: transparent; color: var(--navy); }
.btn--ghost:hover { background: rgba(35, 52, 77, .08); }
.btn--sm { padding: .3rem .6rem; font-size: .85rem; }
.btn--block { width: 100%; }

/* ---------- flash ---------- */
.flashes { margin: 0 0 1rem; display: grid; gap: .5rem; }
.flash { padding: .6rem .9rem; border-radius: var(--radius); border-left: 4px solid; }
.flash--success { background: #eaf3e2; border-color: var(--green); }
.flash--error   { background: #f7e6e9; border-color: var(--red); }
.flash--info    { background: #e9eef6; border-color: var(--navy-700); }

/* ---------- tagi / tabele ---------- */
.tag {
  display: inline-block; font-size: .72rem; font-weight: 600;
  background: var(--paper-2); color: var(--ink-soft);
  padding: .1rem .45rem; border-radius: 999px; border: 1px solid var(--line);
}
.tag--warn { background: #fbf0d6; color: #7a5a00; border-color: #e6cf96; }
.table { width: 100%; border-collapse: collapse; background: #fff; box-shadow: var(--shadow); border-radius: var(--radius); overflow: hidden; }
.table th, .table td { text-align: left; padding: .7rem .8rem; border-bottom: 1px solid var(--line); }
.table th { background: var(--paper-2); font-size: .82rem; text-transform: uppercase; letter-spacing: .03em; color: var(--ink-soft); }
.row--muted td { color: var(--ink-soft); opacity: .7; }
.empty { color: var(--ink-soft); background: #fff; padding: 1.2rem; border-radius: var(--radius); border: 1px dashed var(--line); }
.lead { color: var(--ink-soft); max-width: 60ch; }
.back { display: inline-block; margin-bottom: .5rem; text-decoration: none; color: var(--ink-soft); }

/* ---------- formularze ---------- */
.form { display: grid; gap: 1rem; background: #fff; padding: 1.4rem; border-radius: var(--radius); box-shadow: var(--shadow); }
.form--narrow { max-width: 560px; }
.field { display: grid; gap: .3rem; }
.field label { font-weight: 600; font-size: .9rem; }
.field--check { flex-direction: row; }
.input, .field input, .field select, .field textarea {
  width: 100%; padding: .55rem .65rem; font: inherit;
  border: 1px solid var(--line); border-radius: var(--radius); background: #fffdf8;
}
.field textarea { min-height: 5rem; resize: vertical; }
.field__hint { color: var(--ink-soft); font-size: .8rem; }
.field__error { color: var(--red); font-size: .8rem; }
.form__actions { display: flex; gap: .6rem; align-items: center; }

/* ---------- panel ---------- */
.panel { background: var(--paper); }
.panel__topbar {
  display: flex; align-items: center; gap: 1.2rem;
  background: var(--navy); color: #fff; padding: .6rem 1.2rem; flex-wrap: wrap;
}
.panel__brand { color: #fff; font-family: var(--font-head); font-size: 1.15rem; text-decoration: none; }
.panel__brand span { display: inline-block; margin-left: .4rem; font-size: .7rem; color: var(--mustard); text-transform: uppercase; letter-spacing: .1em; vertical-align: middle; }
.panel__nav { display: flex; gap: .3rem; flex-wrap: wrap; margin-right: auto; }
.panel__nav a { color: #dfe6f0; text-decoration: none; padding: .35rem .6rem; border-radius: var(--radius); font-size: .92rem; }
.panel__nav a:hover { background: rgba(255,255,255,.1); }
.panel__nav a.is-active { background: var(--navy-700); color: #fff; }
.panel__user { display: flex; align-items: center; gap: .6rem; font-size: .88rem; }
.panel__user span { opacity: .85; }
.panel__main { padding: 0; }
.panel__content { max-width: 1000px; margin: 0 auto; padding: 1.6rem 1.2rem 3rem; }
.panel__h1 { margin: .2rem 0 1rem; }
.panel__head-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* lista lekcji (dashboard) */
.lesson-list { list-style: none; padding: 0; margin: 0; display: grid; gap: .7rem; }
.lesson-row {
  display: grid; grid-template-columns: 130px 1fr auto; gap: 1rem; align-items: center;
  background: #fff; border-radius: var(--radius); padding: .8rem 1rem;
  box-shadow: var(--shadow); border-left: 4px solid var(--navy-700);
}
.lesson-row--completed { border-left-color: var(--green); }
.lesson-row--cancelled { border-left-color: #9a9a9a; opacity: .75; }
.lesson-row--no_show   { border-left-color: var(--red); }
.lesson-row--rescheduled { border-left-color: var(--mustard); }
.lesson-row__when { display: grid; }
.lesson-row__day { font-weight: 700; font-size: .8rem; text-transform: uppercase; color: var(--ink-soft); }
.lesson-row__time { font-size: 1.3rem; font-family: var(--font-head); }
.lesson-row__dur { font-size: .78rem; color: var(--ink-soft); }
.lesson-row__who a { font-weight: 600; text-decoration: none; }
.lesson-row__status { display: block; font-size: .78rem; color: var(--ink-soft); }
.lesson-row__actions { display: flex; gap: .35rem; flex-wrap: wrap; }
.lesson-row__actions form { margin: 0; }

/* legenda kalendarza */
.cal-legend { display: flex; gap: 1rem; flex-wrap: wrap; margin: .5rem 0 1rem; font-size: .82rem; color: var(--ink-soft); }
.cal-legend i { display: inline-block; width: .8rem; height: .8rem; border-radius: 3px; margin-right: .3rem; vertical-align: middle; }
#calendar { background: #fff; padding: 1rem; border-radius: var(--radius); box-shadow: var(--shadow); }

/* ---------- logowanie ---------- */
.auth { background: var(--navy); min-height: 100vh; }
.auth__main { min-height: 100vh; display: grid; place-items: center; padding: 1.2rem; }
.auth__card { background: var(--paper); padding: 2rem; border-radius: 10px; width: min(400px, 100%); box-shadow: 0 12px 40px rgba(0,0,0,.3); }
.auth__brand { font-family: var(--font-head); font-size: 1.3rem; color: var(--navy); text-decoration: none; }
.auth__card h1 { margin: .3rem 0 1.2rem; font-size: 1.3rem; }
.auth__card .form { box-shadow: none; padding: 0; background: transparent; }
.auth__home { display: inline-block; margin-top: 1rem; font-size: .85rem; color: var(--ink-soft); }

/* ---------- responsywność ---------- */
@media (max-width: 640px) {
  .lesson-row { grid-template-columns: 1fr; }
  .lesson-row__actions { justify-content: flex-start; }
  .panel__nav { order: 3; width: 100%; }
}