:root {
  --bg: #f7f5f2; --panel: #ffffff; --ink: #1f1d1a; --muted: #6b665f; --line: #e4dfd8;
  --accent: #b84315; --accent-ink: #ffffff; --soft: #fbeee8;
  --ok: #2e7d32; --part: #b7791f; --bad: #c0392b; --sent: #3b6ea8;
  --trainer: #fff6e0; --trainer-line: #e7c56b; --code: #f1eee9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161514; --panel: #1f1e1c; --ink: #ece8e2; --muted: #a39d94; --line: #34312d;
    --accent: #e0703f; --accent-ink: #1a0e08; --soft: #3a2419;
    --trainer: #2e2716; --trainer-line: #7a6227; --code: #2a2825;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--ink); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
button { font: inherit; cursor: pointer; border: 0; border-radius: 8px; padding: 8px 14px; background: var(--accent); color: var(--accent-ink); }
button.link { background: none; color: var(--muted); padding: 4px 8px; }
button.ghost { background: none; color: var(--accent); border: 1px solid var(--line); }
button:disabled { opacity: .5; cursor: default; }
input, select, textarea { font: inherit; color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; }
textarea { resize: vertical; }
code, pre { font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; font-size: .92em; }
.hidden { display: none !important; }
.err { color: var(--bad); min-height: 1.4em; }

/* logowanie */
.login { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.login-box { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 28px; width: min(380px, 100%); display: grid; gap: 12px; }
.login-box h1 { margin: 0; font-size: 1.4rem; }
.login-box p { margin: 0; color: var(--muted); }

/* nagłówek */
header { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 16px; padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.title { display: flex; align-items: center; gap: 10px; font-weight: 650; }
.logo { width: 22px; height: 22px; border-radius: 6px; background: var(--accent); display: inline-block; }
nav { display: flex; gap: 4px; flex-wrap: wrap; }
nav button { background: none; color: var(--muted); }
nav button.active { background: var(--soft); color: var(--accent); font-weight: 600; }
.right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.role { font-size: .85rem; color: var(--muted); }
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); vertical-align: middle; }

main { max-width: 1100px; margin: 0 auto; padding: 16px; }
.toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; color: var(--muted); font-size: .92rem; }
.conn { margin-left: auto; font-size: .85rem; }
.conn.ok { color: var(--ok); } .conn.bad { color: var(--bad); }

/* tablica */
.feed { display: flex; flex-direction: column; gap: 8px; height: calc(100vh - 290px); min-height: 280px; overflow-y: auto; padding: 4px 2px 12px; }
.entry { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; max-width: 900px; }
.entry.trainer { background: var(--trainer); border-color: var(--trainer-line); }
.entry.mine { border-left: 4px solid var(--accent); }
.entry.hidden-entry { opacity: .55; }
.meta { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; font-size: .85rem; color: var(--muted); }
.meta .who { font-weight: 650; color: var(--ink); }
.badge { font-size: .75rem; border-radius: 6px; padding: 1px 7px; background: var(--code); color: var(--muted); }
.badge.task { background: var(--soft); color: var(--accent); }
.badge.trainer { background: var(--trainer-line); color: #2b2109; }
.badge.lvl-HIGH { background: var(--bad); color: #fff; } .badge.lvl-MED { background: var(--part); color: #fff; }
.badge.zaliczone { background: var(--ok); color: #fff; } .badge.czesciowo { background: var(--part); color: #fff; } .badge.nie { background: var(--bad); color: #fff; }
.text { white-space: pre-wrap; overflow-wrap: anywhere; margin-top: 4px; }
.text.long { max-height: 14em; overflow: hidden; position: relative; }
.more { background: none; color: var(--accent); padding: 2px 0; font-size: .85rem; }
.actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.actions button { padding: 3px 9px; font-size: .8rem; background: var(--code); color: var(--ink); }
.actions button.ok { background: var(--ok); color: #fff; } .actions button.part { background: var(--part); color: #fff; } .actions button.bad { background: var(--bad); color: #fff; }
.grade-note { margin-top: 6px; font-size: .9rem; color: var(--muted); white-space: pre-wrap; }

.post { position: sticky; bottom: 0; background: var(--bg); padding-top: 8px; display: grid; gap: 6px; }
.post-row { display: flex; gap: 8px; align-items: stretch; flex-wrap: wrap; }
.post-row textarea { flex: 1; min-width: 200px; }
#post-name { width: 180px; }
.post-row.small { font-size: .85rem; color: var(--muted); align-items: center; }
.file input { font-size: .8rem; max-width: 230px; }
.reply { background: var(--soft); color: var(--accent); border-radius: 6px; padding: 1px 8px; }
.msg { margin-left: auto; }
.msg.bad { color: var(--bad); } .msg.ok { color: var(--ok); }

/* zadania */
.tasks { display: grid; grid-template-columns: 290px 1fr; gap: 16px; align-items: start; }
.modules { display: grid; gap: 8px; position: sticky; top: 70px; max-height: calc(100vh - 90px); overflow-y: auto; }
.module { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 8px; }
.module h3 { margin: 0; font-size: .95rem; display: flex; align-items: center; gap: 8px; padding: 4px 6px; }
.module h3 .lock { color: var(--muted); font-weight: 400; font-size: .8rem; margin-left: auto; }
.module.closed h3 { color: var(--muted); }
.module ul { list-style: none; margin: 4px 0 0; padding: 0; }
.module li button { width: 100%; text-align: left; background: none; color: var(--ink); padding: 6px 8px; border-radius: 8px; display: flex; gap: 8px; }
.module li button:hover, .module li button.active { background: var(--soft); }
.module li .code { color: var(--muted); font-size: .8rem; min-width: 46px; }
.module li.off button { color: var(--muted); text-decoration: line-through; }
.switch { font-size: .8rem; padding: 3px 10px; }
.switch.on { background: var(--ok); color: #fff; } .switch.off { background: var(--code); color: var(--ink); }
.eye { background: none; color: var(--muted); padding: 2px 6px; font-size: .8rem; }

.task { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 20px 26px; min-height: 300px; }
.task .empty { color: var(--muted); }
.task-head { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding-bottom: 12px; margin-bottom: 8px; }
.task-head .t { font-size: 1.25rem; font-weight: 700; margin-right: auto; }
.task-body { font-size: 1.05rem; line-height: 1.6; }
.task-body h1 { font-size: 1.35rem; } .task-body h2 { font-size: 1.1rem; margin-top: 1.3em; }
.task-body code { background: var(--code); padding: 1px 5px; border-radius: 5px; }
.task-body pre { background: var(--code); padding: 12px 14px; border-radius: 10px; overflow-x: auto; position: relative; }
.task-body pre code { background: none; padding: 0; }
.task-body blockquote { margin: 10px 0; padding: 10px 14px 10px 14px; border-left: 4px solid var(--accent); background: var(--soft); border-radius: 0 10px 10px 0; position: relative; }
.task-body blockquote p { margin: 0; }
.task-body li { margin: 4px 0; }
.copy-wrap { position: relative; }
.copy { position: absolute; top: 6px; right: 6px; font-size: .78rem; padding: 3px 9px; background: var(--accent); color: var(--accent-ink); opacity: .92; }
.prompt-em { display: block; margin: 8px 0; padding: 10px 70px 10px 14px; border-left: 4px solid var(--accent); background: var(--soft); border-radius: 0 10px 10px 0; font-style: normal; position: relative; }
.task-files { margin-top: 18px; padding-top: 12px; border-top: 1px solid var(--line); font-size: .95rem; }

/* jak dołączyć */
.howto { max-width: 860px; display: grid; gap: 14px; }
.step { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; }
.step h3 { margin: 0 0 6px; font-size: 1.05rem; }
.step p { margin: 6px 0; }
.cmd { position: relative; background: var(--code); border-radius: 10px; padding: 12px 80px 12px 14px; white-space: pre-wrap; overflow-wrap: anywhere; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .9rem; margin: 6px 0; }
.os { display: flex; gap: 6px; margin: 4px 0 8px; }
.os button { background: var(--code); color: var(--ink); padding: 4px 10px; font-size: .85rem; }
.os button.active { background: var(--accent); color: var(--accent-ink); }

/* postępy */
.progress { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
.progress table { border-collapse: collapse; width: 100%; font-size: .9rem; }
.progress th, .progress td { border-bottom: 1px solid var(--line); padding: 6px 8px; text-align: center; white-space: nowrap; }
.progress th:first-child, .progress td:first-child { text-align: left; position: sticky; left: 0; background: var(--panel); }
.st { display: inline-block; width: 14px; height: 14px; border-radius: 4px; background: var(--line); vertical-align: -2px; margin: 0 3px 0 8px; }
.st.wyslane { background: var(--sent); } .st.zaliczone { background: var(--ok); } .st.czesciowo { background: var(--part); } .st.nie { background: var(--bad); }
td .st { margin: 0; cursor: pointer; }
.legend { margin-left: auto; }
.admin-box { margin-top: 18px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; display: grid; gap: 10px; }
.admin-box h3 { margin: 0; font-size: 1rem; }
.inline { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* okno i komunikaty */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.45); display: grid; place-items: center; z-index: 20; padding: 16px; }
.modal-box { background: var(--panel); border-radius: 14px; padding: 20px; width: min(860px, 100%); max-height: 85vh; overflow: auto; position: relative; }
.modal-box pre { background: var(--code); padding: 12px; border-radius: 10px; white-space: pre-wrap; overflow-wrap: anywhere; }
.close { position: absolute; top: 8px; right: 10px; background: none; color: var(--muted); font-size: 1.4rem; }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: 8px 16px; border-radius: 10px; z-index: 30; }

@media (max-width: 760px) {
  .tasks { grid-template-columns: 1fr; }
  .modules { position: static; max-height: none; }
  .task { padding: 14px; }
  .feed { height: calc(100vh - 330px); }
  #post-name { width: 100%; }
  header { gap: 8px; }
}