/* ==========================================================================
   BTSSS – dizajnový systém
   ========================================================================== */

:root {
  --font: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "Cascadia Code", "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;

  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-2: #f1f4f9;
  --surface-3: #e8ecf4;
  --border: #e1e6ef;
  --border-strong: #cdd5e3;
  --text: #0e1628;
  --text-2: #465167;
  --muted: #768199;

  --primary: #2350b0;
  --primary-hover: #1b4197;
  --primary-soft: #e7eefc;
  --primary-text: #1d4499;
  --accent: #0f9f9a;
  --accent-soft: #e0f5f3;

  --success: #15803d;
  --success-soft: #e5f5ea;
  --warning: #b45309;
  --warning-soft: #fdf2df;
  --danger: #c81e1e;
  --danger-soft: #fdeaea;
  --info: #1d4ed8;
  --info-soft: #e6eefd;
  --violet: #6d3fd6;
  --violet-soft: #efe9fd;

  --side-bg: #0b1428;
  --side-text: #c4cde0;
  --side-muted: #6f7b95;
  --side-hover: #16223d;
  --side-active: #1d2e52;
  --paper: #f5f1e3;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow: 0 1px 2px rgba(15, 23, 42, .05), 0 6px 20px -8px rgba(15, 23, 42, .12);
  --shadow-lg: 0 24px 60px -20px rgba(15, 23, 42, .35);
  --ring: 0 0 0 3px rgba(35, 80, 176, .25);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #080e1c;
  --surface: #0f182b;
  --surface-2: #142038;
  --surface-3: #1a2844;
  --border: #1f2c47;
  --border-strong: #2c3b5c;
  --text: #e7ecf5;
  --text-2: #aeb8cc;
  --muted: #7d889f;

  --primary: #5b8cf5;
  --primary-hover: #7aa2f8;
  --primary-soft: rgba(91, 140, 245, .14);
  --primary-text: #8fb0fa;
  --accent: #2dd4bf;
  --accent-soft: rgba(45, 212, 191, .12);

  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, .12);
  --warning: #fbbf24;
  --warning-soft: rgba(251, 191, 36, .12);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, .13);
  --info: #60a5fa;
  --info-soft: rgba(96, 165, 250, .13);
  --violet: #a78bfa;
  --violet-soft: rgba(167, 139, 250, .14);

  --side-bg: #060b17;
  --side-hover: #111b31;
  --side-active: #17274a;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px -10px rgba(0, 0, 0, .6);
  --ring: 0 0 0 3px rgba(91, 140, 245, .35);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { vertical-align: middle; }
img { max-width: 100%; }
a { color: var(--primary-text); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; margin: 0; color: var(--text); letter-spacing: -.01em; }
h1 { font-size: 1.85rem; font-weight: 700; }
h2 { font-size: 1.3rem; font-weight: 650; }
h3 { font-size: 1.05rem; font-weight: 650; }
p { margin: 0 0 .75rem; }
p:last-child { margin-bottom: 0; }
code, kbd, pre { font-family: var(--mono); font-size: .9em; }
hr { border: 0; border-top: 1px solid var(--border); margin: 1.25rem 0; }
[hidden] { display: none !important; }
::selection { background: var(--primary-soft); }
.icon { flex-shrink: 0; }

:focus-visible { outline: none; box-shadow: var(--ring); border-radius: 6px; }

/* ---------------------------------------------------------------- utility */
.stack { display: flex; flex-direction: column; gap: var(--gap, 1rem); }
.row { display: flex; align-items: center; gap: var(--gap, .75rem); flex-wrap: wrap; }
.row-nowrap { flex-wrap: nowrap; }
.between { justify-content: space-between; }
.end { justify-content: flex-end; }
.center { justify-content: center; }
.grow { flex: 1 1 auto; min-width: 0; }
.gap-xs { --gap: .35rem; } .gap-sm { --gap: .6rem; } .gap-lg { --gap: 1.5rem; } .gap-xl { --gap: 2rem; }
.grid { display: grid; gap: var(--gap, 1rem); }
.grid-2 { display: grid; gap: var(--gap, 1rem); grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { display: grid; gap: var(--gap, 1rem); grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { display: grid; gap: var(--gap, 1rem); grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-auto { display: grid; gap: var(--gap, 1rem); grid-template-columns: repeat(auto-fill, minmax(var(--min, 260px), 1fr)); }
.span-2 { grid-column: span 2; }
.muted { color: var(--muted); }
.text-2 { color: var(--text-2); }
.small { font-size: .85rem; }
.xsmall { font-size: .76rem; }
.large { font-size: 1.1rem; }
.strong { font-weight: 650; }
.mono { font-family: var(--mono); }
.nowrap { white-space: nowrap; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tc { text-align: center; } .tr { text-align: right; }
.mt-0 { margin-top: 0; } .mt-1 { margin-top: .5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; } .mt-4 { margin-top: 2.25rem; }
.mb-1 { margin-bottom: .5rem; } .mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; }
.w-full { width: 100%; }
.text-success { color: var(--success); } .text-danger { color: var(--danger); } .text-warning { color: var(--warning); } .text-primary { color: var(--primary-text); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.hide-mobile { }
.show-mobile { display: none !important; }
.prose { color: var(--text-2); max-width: 72ch; }
.prose p { margin-bottom: .9rem; }
.pre-line { white-space: pre-line; }

/* ---------------------------------------------------------------- buttons */
.btn {
  --btn-bg: var(--surface);
  --btn-fg: var(--text);
  --btn-bd: var(--border-strong);
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  height: 2.5rem; padding: 0 1rem;
  font: inherit; font-size: .92rem; font-weight: 600; line-height: 1;
  color: var(--btn-fg); background: var(--btn-bg);
  border: 1px solid var(--btn-bd); border-radius: var(--radius-sm);
  cursor: pointer; white-space: nowrap; text-decoration: none !important;
  transition: background .15s, border-color .15s, color .15s, box-shadow .15s, transform .05s;
  user-select: none;
}
.btn:hover { --btn-bg: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn.is-disabled { opacity: .5; cursor: not-allowed; pointer-events: none; }
.btn-primary { --btn-bg: var(--primary); --btn-fg: #fff; --btn-bd: var(--primary); box-shadow: 0 1px 0 rgba(255,255,255,.15) inset, var(--shadow-sm); }
.btn-primary:hover { --btn-bg: var(--primary-hover); --btn-bd: var(--primary-hover); }
:root[data-theme="dark"] .btn-primary { --btn-fg: #06122b; }
.btn-accent { --btn-bg: var(--accent); --btn-fg: #fff; --btn-bd: var(--accent); }
:root[data-theme="dark"] .btn-accent { --btn-fg: #032320; }
.btn-soft { --btn-bg: var(--primary-soft); --btn-fg: var(--primary-text); --btn-bd: transparent; }
.btn-soft:hover { --btn-bg: var(--primary-soft); filter: brightness(.97); }
.btn-ghost { --btn-bg: transparent; --btn-bd: transparent; --btn-fg: var(--text-2); }
.btn-ghost:hover { --btn-bg: var(--surface-2); --btn-fg: var(--text); }
.btn-danger { --btn-bg: var(--danger); --btn-fg: #fff; --btn-bd: var(--danger); }
.btn-danger:hover { filter: brightness(.93); --btn-bg: var(--danger); }
.btn-danger-soft { --btn-bg: var(--danger-soft); --btn-fg: var(--danger); --btn-bd: transparent; }
.btn-success { --btn-bg: var(--success); --btn-fg: #fff; --btn-bd: var(--success); }
.btn-sm { height: 2.05rem; padding: 0 .75rem; font-size: .84rem; border-radius: 7px; }
.btn-xs { height: 1.7rem; padding: 0 .55rem; font-size: .78rem; border-radius: 6px; gap: .3rem; }
.btn-lg { height: 3rem; padding: 0 1.4rem; font-size: 1rem; border-radius: 10px; }
.btn-icon { width: 2.5rem; padding: 0; }
.btn-icon.btn-sm { width: 2.05rem; }
.btn-icon.btn-xs { width: 1.7rem; }
.btn-block { width: 100%; }

/* ---------------------------------------------------------------- cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.card-body { padding: 1.25rem; }
.card-pad { padding: 1.25rem; }
.card-header {
  display: flex; align-items: center; justify-content: space-between; gap: .75rem; flex-wrap: wrap;
  padding: 1rem 1.25rem; border-bottom: 1px solid var(--border);
}
.card-header h2, .card-header h3 { font-size: 1rem; display: flex; align-items: center; gap: .55rem; }
.card-footer { padding: .9rem 1.25rem; border-top: 1px solid var(--border); background: var(--surface-2); border-radius: 0 0 var(--radius) var(--radius); }
.card-link { transition: border-color .15s, box-shadow .15s, transform .15s; color: inherit; display: block; }
.card-link:hover { border-color: var(--border-strong); box-shadow: var(--shadow); text-decoration: none; transform: translateY(-1px); }
.card-muted { background: var(--surface-2); box-shadow: none; }
.card-highlight { border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); box-shadow: 0 0 0 3px var(--primary-soft); }

.section-title { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin: 2rem 0 .9rem; flex-wrap: wrap; }
.section-title h2 { font-size: 1.1rem; display: flex; align-items: center; gap: .5rem; }
.eyebrow { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .09em; color: var(--muted); }

/* ---------------------------------------------------------------- badges */
.badge {
  display: inline-flex; align-items: center; gap: .3rem;
  height: 1.45rem; padding: 0 .55rem; border-radius: 999px;
  font-size: .74rem; font-weight: 650; line-height: 1; white-space: nowrap;
  color: var(--text-2); background: var(--surface-3);
}
.badge .icon { width: 13px; height: 13px; }
.badge-primary, .badge-info { color: var(--primary-text); background: var(--primary-soft); }
.badge-success { color: var(--success); background: var(--success-soft); }
.badge-warning { color: var(--warning); background: var(--warning-soft); }
.badge-danger { color: var(--danger); background: var(--danger-soft); }
.badge-violet { color: var(--violet); background: var(--violet-soft); }
.badge-accent { color: var(--accent); background: var(--accent-soft); }
.badge-muted { color: var(--muted); background: var(--surface-2); }
.badge-outline { background: transparent; border: 1px solid var(--border-strong); }
.dot { width: .5rem; height: .5rem; border-radius: 50%; background: currentColor; display: inline-block; }

/* ---------------------------------------------------------------- alerts */
.alert {
  display: flex; gap: .75rem; align-items: flex-start;
  padding: .85rem 1rem; border-radius: var(--radius-sm);
  background: var(--info-soft); color: var(--text); border: 1px solid transparent;
  font-size: .92rem;
}
.alert > .icon { color: var(--info); margin-top: .1rem; }
.alert-success { background: var(--success-soft); } .alert-success > .icon { color: var(--success); }
.alert-warning { background: var(--warning-soft); } .alert-warning > .icon { color: var(--warning); }
.alert-danger { background: var(--danger-soft); } .alert-danger > .icon { color: var(--danger); }
.alert strong { display: block; margin-bottom: .1rem; }

/* ---------------------------------------------------------------- forms */
.field { display: flex; flex-direction: column; gap: .35rem; min-width: 0; }
.field > label, .label { font-size: .84rem; font-weight: 600; color: var(--text-2); }
.field .help, .helptext { font-size: .78rem; color: var(--muted); }
.field .error, .errorlist { font-size: .8rem; color: var(--danger); list-style: none; padding: 0; margin: 0; }
.input, .select, .textarea,
.field input[type="text"], .field input[type="email"], .field input[type="password"], .field input[type="number"],
.field input[type="date"], .field input[type="time"], .field input[type="datetime-local"], .field input[type="url"],
.field input[type="search"], .field select, .field textarea {
  width: 100%; min-height: 2.6rem; padding: .55rem .8rem;
  font: inherit; font-size: .94rem; color: var(--text);
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  transition: border-color .15s, box-shadow .15s;
}
.textarea, .field textarea { min-height: 6rem; resize: vertical; line-height: 1.5; }
.input:focus, .select:focus, .textarea:focus, .field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: var(--ring);
}
.field.has-error input, .field.has-error select, .field.has-error textarea { border-color: var(--danger); }
.select, .field select {
  appearance: none; padding-right: 2.2rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%23768199' stroke-width='2' viewBox='0 0 24 24'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right .7rem center;
}
.field input[type="file"] { font-size: .88rem; color: var(--text-2); padding: .45rem; border: 1px dashed var(--border-strong); border-radius: var(--radius-sm); background: var(--surface-2); width: 100%; }
.check { display: flex; gap: .6rem; align-items: flex-start; font-size: .92rem; cursor: pointer; }
.check input { margin-top: .2rem; width: 1.05rem; height: 1.05rem; accent-color: var(--primary); flex-shrink: 0; }
.input-icon { position: relative; }
.input-icon > .icon { position: absolute; left: .75rem; top: 50%; transform: translateY(-50%); color: var(--muted); pointer-events: none; }
.input-icon > input { padding-left: 2.4rem !important; }
.form-grid { display: grid; gap: 1rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-grid .full { grid-column: 1 / -1; }
.form-actions { display: flex; gap: .6rem; justify-content: flex-end; flex-wrap: wrap; margin-top: 1.25rem; }

.switch { position: relative; display: inline-flex; align-items: center; gap: .6rem; cursor: pointer; font-size: .92rem; }
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch .track { width: 2.4rem; height: 1.35rem; border-radius: 999px; background: var(--border-strong); position: relative; transition: background .2s; flex-shrink: 0; }
.switch .track::after { content: ""; position: absolute; top: 3px; left: 3px; width: calc(1.35rem - 6px); height: calc(1.35rem - 6px); border-radius: 50%; background: #fff; box-shadow: 0 1px 2px rgba(0,0,0,.3); transition: transform .2s; }
.switch input:checked + .track { background: var(--primary); }
.switch input:checked + .track::after { transform: translateX(1.05rem); }
.switch input:focus-visible + .track { box-shadow: var(--ring); }

/* ---------------------------------------------------------------- tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table th {
  text-align: left; font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
  color: var(--muted); padding: .7rem 1rem; border-bottom: 1px solid var(--border); background: var(--surface-2); white-space: nowrap;
}
.table td { padding: .75rem 1rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table tr:last-child td { border-bottom: 0; }
.table tbody tr:hover td { background: color-mix(in srgb, var(--surface-2) 60%, transparent); }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.table-compact td, .table-compact th { padding: .5rem .75rem; }
.table tr.is-me td { background: var(--primary-soft); }

/* ---------------------------------------------------------------- progress */
.progress { height: .5rem; border-radius: 999px; background: var(--surface-3); overflow: hidden; }
.progress > span { display: block; height: 100%; border-radius: inherit; background: var(--primary); transition: width .5s ease; }
.progress.success > span { background: var(--success); }
.progress.warning > span { background: var(--warning); }
.progress.danger > span { background: var(--danger); }
.progress.info > span { background: var(--primary); }
.progress.muted > span { background: var(--muted); }
.progress-lg { height: .75rem; }
.progress-sm { height: .32rem; }

.ring { --size: 96px; --value: 0; --color: var(--primary); width: var(--size); height: var(--size); border-radius: 50%;
  background: conic-gradient(var(--color) calc(var(--value) * 1%), var(--surface-3) 0);
  display: grid; place-items: center; position: relative; flex-shrink: 0; }
.ring::before { content: ""; position: absolute; inset: 9px; border-radius: 50%; background: var(--surface); }
.ring > * { position: relative; text-align: center; line-height: 1.1; }
.ring strong { font-size: 1.2rem; display: block; }

/* ---------------------------------------------------------------- stats */
.stat { padding: 1.1rem 1.2rem; display: flex; gap: .9rem; align-items: center; }
.stat-icon { width: 2.75rem; height: 2.75rem; border-radius: 11px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary-text); flex-shrink: 0; }
.stat-icon.success { background: var(--success-soft); color: var(--success); }
.stat-icon.warning { background: var(--warning-soft); color: var(--warning); }
.stat-icon.danger { background: var(--danger-soft); color: var(--danger); }
.stat-icon.violet { background: var(--violet-soft); color: var(--violet); }
.stat-icon.accent { background: var(--accent-soft); color: var(--accent); }
.stat-value { font-family: var(--font-display); font-size: 1.55rem; font-weight: 700; line-height: 1.1; font-variant-numeric: tabular-nums; }
.stat-label { font-size: .8rem; color: var(--muted); font-weight: 550; }

/* ---------------------------------------------------------------- tabs */
.tabs { display: inline-flex; gap: .25rem; padding: .25rem; background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; flex-wrap: wrap; }
.tab { display: inline-flex; align-items: center; gap: .45rem; height: 2.1rem; padding: 0 .9rem; border-radius: 7px; border: 0; background: transparent; font: inherit; font-size: .88rem; font-weight: 600; color: var(--text-2); cursor: pointer; text-decoration: none !important; }
.tab:hover { color: var(--text); }
.tab.is-active, .tab[aria-selected="true"] { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }
.tab .count { font-size: .72rem; padding: .05rem .4rem; border-radius: 999px; background: var(--surface-3); color: var(--muted); }

/* ---------------------------------------------------------------- empty */
.empty { text-align: center; padding: 2.5rem 1.5rem; color: var(--muted); }
.empty .icon { width: 44px; height: 44px; color: var(--border-strong); margin-bottom: .6rem; }
.empty h3 { color: var(--text-2); margin-bottom: .3rem; }

/* ---------------------------------------------------------------- avatar */
.avatar { --s: 2.25rem; width: var(--s); height: var(--s); border-radius: 50%; display: inline-grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; font-weight: 700; font-size: calc(var(--s) * .38); overflow: hidden; flex-shrink: 0; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar-lg { --s: 4.5rem; }
.avatar-xl { --s: 6rem; }

/* ---------------------------------------------------------------- modal */
dialog.modal {
  border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 0; width: min(520px, calc(100vw - 2rem));
  background: var(--surface); color: var(--text); box-shadow: var(--shadow-lg);
}
dialog.modal-lg { width: min(860px, calc(100vw - 2rem)); }
dialog.modal::backdrop { background: rgba(6, 11, 23, .55); backdrop-filter: blur(3px); }
dialog.modal[open] { animation: pop .18s ease-out; }
.modal-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.1rem 1.3rem .5rem; }
.modal-head h2 { font-size: 1.1rem; display: flex; gap: .55rem; align-items: center; }
.modal-body { padding: .5rem 1.3rem 1.2rem; color: var(--text-2); max-height: 70vh; overflow: auto; }
.modal-foot { display: flex; gap: .6rem; justify-content: flex-end; padding: .9rem 1.3rem; border-top: 1px solid var(--border); background: var(--surface-2); border-radius: 0 0 var(--radius-lg) var(--radius-lg); flex-wrap: wrap; }
@keyframes pop { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: none; } }

/* ---------------------------------------------------------------- toasts */
.toasts { position: fixed; z-index: 1000; top: 1rem; right: 1rem; display: flex; flex-direction: column; gap: .5rem; width: min(380px, calc(100vw - 2rem)); pointer-events: none; }
.toast {
  pointer-events: auto; display: flex; gap: .7rem; align-items: flex-start;
  padding: .8rem .9rem; border-radius: var(--radius); background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-left: 4px solid var(--info); box-shadow: var(--shadow-lg); font-size: .9rem;
  animation: toast-in .25s ease-out;
}
.toast.success { border-left-color: var(--success); } .toast.success > .icon { color: var(--success); }
.toast.error, .toast.danger { border-left-color: var(--danger); } .toast.error > .icon { color: var(--danger); }
.toast.warning { border-left-color: var(--warning); } .toast.warning > .icon { color: var(--warning); }
.toast.info > .icon { color: var(--info); }
.toast .grow { padding-top: .05rem; }
.toast.is-leaving { animation: toast-out .2s ease-in forwards; }
@keyframes toast-in { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: none; } }
@keyframes toast-out { to { opacity: 0; transform: translateX(20px); } }

/* ==========================================================================
   Layout – verejná časť
   ========================================================================== */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--surface) 85%, transparent); backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner { max-width: 1200px; margin: 0 auto; padding: .7rem 1.25rem; display: flex; align-items: center; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .8rem; color: var(--text); text-decoration: none !important; }
.brand-mark { display: inline-flex; align-items: center; gap: .55rem; }
.brand-dots { display: grid; grid-template-columns: repeat(4, 5px); gap: 4px; }
.brand-dots i { width: 5px; height: 5px; border-radius: 50%; background: #2a55b8; display: block; }
:root[data-theme="dark"] .brand-dots i, .sidebar .brand-dots i { background: #6c95f3; }
.brand-stu { font-weight: 800; letter-spacing: .18em; font-size: .78rem; line-height: 1.05; }
.brand-stu span { display: block; font-weight: 400; letter-spacing: .3em; }
.brand-divider { width: 1px; height: 1.9rem; background: var(--border-strong); }
.brand-name { font-family: var(--font-display); font-weight: 800; font-size: 1.12rem; letter-spacing: .02em; }
.brand-sub { display: block; font-size: .7rem; color: var(--muted); font-weight: 500; letter-spacing: 0; }

.page-public { max-width: 1200px; margin: 0 auto; padding: 0 1.25rem 4rem; }

.hero { position: relative; padding: 4.5rem 0 3.5rem; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0 -30% auto auto; width: 640px; height: 520px; z-index: -1;
  background-image: radial-gradient(circle, color-mix(in srgb, var(--primary) 38%, transparent) 2.5px, transparent 3px);
  background-size: 28px 28px; mask-image: radial-gradient(closest-side, #000 30%, transparent); -webkit-mask-image: radial-gradient(closest-side, #000 30%, transparent);
  opacity: .8;
}
.hero-kicker { display: inline-flex; align-items: center; gap: .5rem; padding: .35rem .8rem; border-radius: 999px; background: var(--primary-soft); color: var(--primary-text); font-weight: 650; font-size: .8rem; }
.hero h1 { font-size: clamp(2rem, 4.6vw, 3.4rem); font-weight: 800; letter-spacing: -.025em; margin: 1rem 0 1rem; max-width: 24ch; }
.hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--primary), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 1.1rem; color: var(--text-2); max-width: 62ch; }
.hero-actions { display: flex; gap: .75rem; margin-top: 1.75rem; flex-wrap: wrap; }

.feature { padding: 1.35rem; }
.feature .stat-icon { margin-bottom: .9rem; }
.feature h3 { margin-bottom: .35rem; }
.feature p { color: var(--text-2); font-size: .92rem; }

.syllabus { counter-reset: s; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: .1rem 2rem; list-style: none; padding: 0; margin: 0; }
.syllabus li { counter-increment: s; display: flex; gap: .9rem; padding: .7rem 0; border-bottom: 1px dashed var(--border); color: var(--text-2); }
.syllabus li::before { content: counter(s, decimal-leading-zero); font-family: var(--mono); font-weight: 700; color: var(--primary-text); font-size: .85rem; padding-top: .1rem; }

.footer { border-top: 1px solid var(--border); padding: 1.5rem 1.25rem; color: var(--muted); font-size: .85rem; }
.footer-inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

.auth-wrap { min-height: calc(100vh - 64px); display: grid; place-items: center; padding: 2.5rem 1rem; }
.auth-card { width: min(440px, 100%); }
.auth-card .card-body { padding: 2rem; }
.auth-card h1 { font-size: 1.55rem; margin-bottom: .35rem; }

/* ==========================================================================
   Layout – portál (študent aj učiteľ)
   ========================================================================== */
.shell { display: grid; grid-template-columns: 268px minmax(0, 1fr); min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
  background: var(--side-bg); color: var(--side-text);
  display: flex; flex-direction: column; padding: 1rem .8rem;
  scrollbar-width: thin; scrollbar-color: #24324f transparent;
}
.sidebar .brand { color: #fff; padding: .35rem .55rem 1.1rem; }
.sidebar .brand-divider { background: #2a3654; }
.sidebar .brand-sub { color: var(--side-muted); }
.nav-group { margin-top: 1rem; }
.nav-group-title { font-size: .68rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--side-muted); padding: 0 .7rem .4rem; }
.nav-link {
  display: flex; align-items: center; gap: .7rem; padding: .55rem .7rem; margin: 1px 0; border-radius: 8px;
  color: var(--side-text); font-size: .92rem; font-weight: 550; text-decoration: none !important; position: relative;
}
.nav-link .icon { color: #7f8cab; }
.nav-link:hover { background: var(--side-hover); color: #fff; }
.nav-link.is-active { background: var(--side-active); color: #fff; }
.nav-link.is-active .icon { color: #8fb0fa; }
.nav-link.is-active::before { content: ""; position: absolute; left: -.8rem; top: .5rem; bottom: .5rem; width: 3px; border-radius: 0 3px 3px 0; background: #6c95f3; }
.nav-link .nav-badge { margin-left: auto; font-size: .7rem; font-weight: 700; padding: .1rem .45rem; border-radius: 999px; background: #2a55b8; color: #fff; }
.sidebar-foot { margin-top: auto; padding-top: 1rem; border-top: 1px solid #18233b; }
.side-user { display: flex; align-items: center; gap: .65rem; padding: .6rem .55rem; border-radius: 10px; color: #fff; text-decoration: none !important; }
.side-user:hover { background: var(--side-hover); }
.side-user .muted { color: var(--side-muted); }
.week-pill { margin: 0 .3rem .4rem; padding: .7rem .8rem; border-radius: 10px; background: linear-gradient(135deg, #14244a, #0f1b36); border: 1px solid #1f2f55; }
.week-pill .eyebrow { color: #7f8cab; }
.week-pill strong { color: #fff; font-size: .98rem; }

.main { min-width: 0; display: flex; flex-direction: column; }
.main-top {
  position: sticky; top: 0; z-index: 40; display: flex; align-items: center; gap: .75rem;
  padding: .7rem 1.75rem; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.crumbs { display: flex; align-items: center; gap: .35rem; font-size: .86rem; color: var(--muted); min-width: 0; }
.crumbs a { color: var(--muted); }
.crumbs .icon { width: 14px; height: 14px; }
.crumbs span:last-child { color: var(--text); font-weight: 600; }
.content { padding: 1.75rem; max-width: 1280px; width: 100%; }
.content-narrow { max-width: 880px; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.page-head h1 { font-size: 1.65rem; }
.page-head p { color: var(--text-2); margin: .3rem 0 0; }

.sidebar-backdrop { display: none; }

/* ---------------------------------------------------------------- learning */
.week { position: relative; }
.week-head { display: flex; align-items: center; gap: 1rem; padding: 1rem 1.25rem; cursor: pointer; list-style: none; }
.week-head::-webkit-details-marker { display: none; }
.week-num { width: 2.6rem; height: 2.6rem; border-radius: 10px; display: grid; place-items: center; font-family: var(--mono); font-weight: 700; background: var(--surface-2); color: var(--text-2); flex-shrink: 0; border: 1px solid var(--border); }
.week.is-current .week-num { background: var(--primary); color: #fff; border-color: var(--primary); }
.week.is-complete .week-num { background: var(--success-soft); color: var(--success); border-color: transparent; }
.week.is-locked { opacity: .75; }
.week.is-locked .week-num { background: transparent; border-style: dashed; }
.week-chevron { transition: transform .2s; color: var(--muted); }
details[open] > .week-head .week-chevron { transform: rotate(90deg); }
.week-body { padding: 0 1.25rem 1.1rem 4.85rem; }
.material { display: flex; align-items: center; gap: .9rem; padding: .7rem .85rem; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); }
.material + .material { margin-top: .5rem; }
.material.is-done { background: color-mix(in srgb, var(--success-soft) 55%, var(--surface)); border-color: color-mix(in srgb, var(--success) 25%, var(--border)); }
.file-badge { width: 2.5rem; height: 2.5rem; border-radius: 9px; display: grid; place-items: center; font-size: .62rem; font-weight: 800; letter-spacing: .03em; flex-shrink: 0; background: var(--danger-soft); color: var(--danger); }
.file-badge.seminar { background: var(--accent-soft); color: var(--accent); }
.file-badge.other { background: var(--violet-soft); color: var(--violet); }

/* ---------------------------------------------------------------- tests */
.test-card { display: flex; flex-direction: column; }
.test-card .card-body { flex: 1; }
.test-card.is-locked { background: var(--surface-2); }
.test-meta { display: flex; gap: .9rem; flex-wrap: wrap; color: var(--muted); font-size: .82rem; }
.test-meta span { display: inline-flex; align-items: center; gap: .3rem; }
.test-meta .icon { width: 15px; height: 15px; }

.exam-shell { min-height: 100vh; background: var(--bg); display: flex; flex-direction: column; }
.exam-top { position: sticky; top: 0; z-index: 30; background: var(--surface); border-bottom: 1px solid var(--border); }
.exam-top-inner { max-width: 1100px; margin: 0 auto; padding: .75rem 1.25rem; display: flex; align-items: center; gap: 1rem; }
.exam-timer { font-family: var(--mono); font-size: 1.15rem; font-weight: 700; display: inline-flex; align-items: center; gap: .45rem; padding: .35rem .8rem; border-radius: 8px; background: var(--surface-2); font-variant-numeric: tabular-nums; }
.exam-timer.is-low { background: var(--danger-soft); color: var(--danger); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .65; } }
.exam-body { max-width: 1100px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; width: 100%; display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 1.5rem; align-items: start; }
.question-card { padding: 1.6rem; }
.question-text { font-size: 1.15rem; font-weight: 600; line-height: 1.45; margin: .5rem 0 1.25rem; white-space: pre-line; }
.option {
  display: flex; align-items: flex-start; gap: .85rem; padding: .85rem 1rem; border: 1.5px solid var(--border); border-radius: 11px;
  cursor: pointer; transition: border-color .12s, background .12s; background: var(--surface);
}
.option + .option { margin-top: .55rem; }
.option:hover { border-color: var(--border-strong); background: var(--surface-2); }
.option input { position: absolute; opacity: 0; pointer-events: none; }
.option .mark { width: 1.3rem; height: 1.3rem; border: 2px solid var(--border-strong); border-radius: 6px; display: grid; place-items: center; flex-shrink: 0; margin-top: .05rem; transition: all .12s; color: transparent; }
.option.is-radio .mark { border-radius: 50%; }
.option .letter { font-family: var(--mono); font-weight: 700; color: var(--muted); font-size: .85rem; margin-top: .1rem; }
.option:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); }
.option:has(input:checked) .mark { background: var(--primary); border-color: var(--primary); color: #fff; }
.option:has(input:focus-visible) { box-shadow: var(--ring); }
.option.dont-know { border-style: dashed; color: var(--text-2); }
.option.dont-know:has(input:checked) { border-color: var(--muted); background: var(--surface-3); }
.option.dont-know:has(input:checked) .mark { background: var(--muted); border-color: var(--muted); }
.qnav { display: grid; grid-template-columns: repeat(5, 1fr); gap: .4rem; }
.qnav button { height: 2.2rem; border-radius: 8px; border: 1px solid var(--border); background: var(--surface); font: inherit; font-size: .85rem; font-weight: 650; color: var(--text-2); cursor: pointer; }
.qnav button.is-answered { background: var(--primary-soft); color: var(--primary-text); border-color: transparent; }
.qnav button.is-current { border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary); color: var(--text); }
.qnav button.is-flagged { background: var(--warning-soft); color: var(--warning); }
.save-state { font-size: .78rem; color: var(--muted); display: inline-flex; align-items: center; gap: .3rem; }
.guard-overlay { position: fixed; inset: 0; z-index: 90; background: rgba(6, 11, 23, .82); backdrop-filter: blur(6px); display: grid; place-items: center; padding: 1rem; }
.guard-overlay .card { max-width: 460px; text-align: center; }

.review-q { padding: 1.2rem 1.3rem; }
.review-q + .review-q { border-top: 1px solid var(--border); }
.review-opt { display: flex; gap: .6rem; align-items: flex-start; padding: .5rem .75rem; border-radius: 8px; font-size: .92rem; border: 1px solid transparent; }
.review-opt + .review-opt { margin-top: .3rem; }
.review-opt .icon { margin-top: .1rem; }
.review-opt.correct-picked { background: var(--success-soft); border-color: color-mix(in srgb, var(--success) 35%, transparent); }
.review-opt.wrong-picked { background: var(--danger-soft); border-color: color-mix(in srgb, var(--danger) 35%, transparent); }
.review-opt.correct-missed { border: 1px dashed color-mix(in srgb, var(--success) 60%, transparent); }
.review-opt.neutral { color: var(--text-2); }
.explanation { margin-top: .75rem; padding: .7rem .9rem; border-radius: 8px; background: var(--surface-2); font-size: .88rem; color: var(--text-2); border-left: 3px solid var(--accent); }
.feedback { margin-top: .6rem; padding: .7rem .9rem; border-radius: 8px; background: var(--violet-soft); font-size: .88rem; border-left: 3px solid var(--violet); }

.score-hero { display: flex; align-items: center; gap: 1.75rem; padding: 1.75rem; flex-wrap: wrap; }
.score-hero .ring { --size: 132px; }
.score-hero .ring strong { font-size: 1.7rem; }

/* ---------------------------------------------------------------- badges (odznaky) */
.achievement { display: flex; gap: .9rem; align-items: center; padding: 1rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.achievement .medal { width: 3.1rem; height: 3.1rem; border-radius: 14px; display: grid; place-items: center; flex-shrink: 0;
  background: var(--surface-2); color: var(--muted); border: 1px dashed var(--border-strong); }
.achievement.is-earned .medal { background: linear-gradient(135deg, #f7c948, #e8891a); color: #fff; border: 0; box-shadow: 0 6px 16px -6px rgba(232, 137, 26, .6); }
.achievement:not(.is-earned) h3 { color: var(--text-2); }

.podium { display: grid; grid-template-columns: 1fr 1.1fr 1fr; gap: .75rem; align-items: end; }
.podium-step { text-align: center; padding: 1rem .75rem; border-radius: var(--radius) var(--radius) 0 0; background: var(--surface-2); border: 1px solid var(--border); }
.podium-step.p1 { min-height: 170px; background: linear-gradient(180deg, color-mix(in srgb, #f7c948 30%, var(--surface)), var(--surface)); }
.podium-step.p2 { min-height: 140px; }
.podium-step.p3 { min-height: 120px; }
.rank-chip { display: inline-grid; place-items: center; width: 1.9rem; height: 1.9rem; border-radius: 50%; font-weight: 800; font-size: .82rem; background: var(--surface-3); color: var(--text-2); }
.rank-chip.r1 { background: #f7c948; color: #5b3d00; }
.rank-chip.r2 { background: #cfd6e3; color: #36415a; }
.rank-chip.r3 { background: #e3a877; color: #5a2c09; }

/* ---------------------------------------------------------------- calendar */
.cal { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); border-top: 1px solid var(--border); border-left: 1px solid var(--border); }
.cal-dow { padding: .5rem; font-size: .72rem; font-weight: 700; text-transform: uppercase; color: var(--muted); text-align: center; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--surface-2); }
.cal-day { min-height: 96px; padding: .4rem; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); font-size: .8rem; background: var(--surface); }
.cal-day.is-out { background: var(--surface-2); color: var(--muted); }
/* deň v kalendári sa dá rozkliknúť a vpravo sa ukáže program dňa */
.cal-day { display: block; color: inherit; text-decoration: none; transition: background .12s ease; }
.cal-day:hover { background: var(--surface-2); }
.cal-day.is-out:hover { background: var(--surface); }
.cal-day.is-selected { background: var(--primary-soft); box-shadow: inset 0 0 0 2px var(--primary); }
.day-item { padding: .6rem 0; border-bottom: 1px solid var(--border); }
.day-item:last-child { border-bottom: 0; }

.cal-day.is-today .cal-date { background: var(--primary); color: #fff; }
.cal-date { display: inline-grid; place-items: center; width: 1.6rem; height: 1.6rem; border-radius: 50%; font-weight: 650; }
.cal-ev { display: block; margin-top: .2rem; padding: .15rem .35rem; border-radius: 5px; font-size: .72rem; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; background: var(--primary-soft); color: var(--primary-text); }
.cal-ev.lecture { background: var(--violet-soft); color: var(--violet); }
.cal-ev.practice { background: var(--accent-soft); color: var(--accent); }
.cal-ev.deadline { background: var(--warning-soft); color: var(--warning); }
.cal-ev.exam, .cal-ev.test { background: var(--danger-soft); color: var(--danger); }
.cal-ev.holiday { background: var(--success-soft); color: var(--success); }
.cal-ev.week { background: transparent; color: var(--muted); padding-left: 0; }
.agenda-item { display: flex; gap: 1rem; padding: .85rem 0; border-bottom: 1px solid var(--border); }
.agenda-item:last-child { border-bottom: 0; }
.agenda-date { width: 3.3rem; text-align: center; flex-shrink: 0; border-radius: 10px; background: var(--surface-2); padding: .35rem 0; }
.agenda-date strong { display: block; font-size: 1.25rem; line-height: 1.1; }
.agenda-date span { font-size: .68rem; text-transform: uppercase; color: var(--muted); font-weight: 700; }

/* ---------------------------------------------------------------- charts */
.bar-chart { display: flex; flex-direction: column; gap: .45rem; }
.bar-row { display: grid; grid-template-columns: minmax(90px, 180px) 1fr 64px; gap: .75rem; align-items: center; font-size: .85rem; }
.bar-track { height: 1.1rem; background: var(--surface-2); border-radius: 6px; position: relative; overflow: hidden; }
.bar-track .zero { position: absolute; top: 0; bottom: 0; width: 1px; background: var(--border-strong); }
.bar-fill { position: absolute; top: 0; bottom: 0; border-radius: 4px; }
.tone-high, .bar-fill.high { background: var(--success); }
.tone-medium, .bar-fill.medium { background: var(--primary); }
.tone-low, .bar-fill.low { background: var(--warning); }
.tone-regression, .bar-fill.regression { background: var(--danger); }

/* ---------------------------------------------------------------- misc */
.kbd { display: inline-block; padding: .05rem .4rem; border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 5px; font-family: var(--mono); font-size: .78rem; background: var(--surface-2); }
.divider-label { display: flex; align-items: center; gap: .75rem; color: var(--muted); font-size: .8rem; margin: 1rem 0; }
.divider-label::before, .divider-label::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.list-plain { list-style: none; padding: 0; margin: 0; }
.list-rows > * { padding: .8rem 1.25rem; border-bottom: 1px solid var(--border); }
.list-rows > *:last-child { border-bottom: 0; }
.dropzone { border: 2px dashed var(--border-strong); border-radius: var(--radius); padding: 1.5rem; text-align: center; background: var(--surface-2); color: var(--text-2); transition: border-color .15s, background .15s; }
.dropzone.is-over { border-color: var(--primary); background: var(--primary-soft); }
.chip-list { display: flex; flex-wrap: wrap; gap: .35rem; }
.theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: inline; }
:root[data-theme="dark"] .theme-toggle .moon { display: none; }
.pagination { display: flex; gap: .35rem; justify-content: center; margin-top: 1rem; }

/* ==========================================================================
   Responzivita
   ========================================================================== */
@media (max-width: 1100px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .exam-body { grid-template-columns: 1fr; }
  .exam-side { order: -1; }
  .qnav { grid-template-columns: repeat(10, 1fr); }
}
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: fixed; z-index: 80; left: 0; top: 0; bottom: 0; width: 280px; transform: translateX(-100%); transition: transform .25s ease; }
  .shell.nav-open .sidebar { transform: none; box-shadow: var(--shadow-lg); }
  .shell.nav-open .sidebar-backdrop { display: block; position: fixed; inset: 0; z-index: 70; background: rgba(6, 11, 23, .5); }
  .show-mobile { display: inline-flex !important; }
  .hide-mobile { display: none !important; }
  .content { padding: 1.25rem 1rem; }
  .main-top { padding: .6rem 1rem; }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .syllabus { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 14.5px; }
  .grid-2, .grid-3, .grid-4, .form-grid { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  .page-head h1 { font-size: 1.4rem; }
  .week-body { padding-left: 1.25rem; }
  .cal-day { min-height: 64px; padding: .2rem; }
  .cal-ev { font-size: 0; height: 6px; padding: 0; margin-top: 3px; }
  .question-card { padding: 1.1rem; }
  .qnav { grid-template-columns: repeat(6, 1fr); }
  .bar-row { grid-template-columns: 90px 1fr 52px; }
  .topbar .brand-sub, .topbar .brand-stu { display: none; }
  .hero { padding-top: 2.5rem; }
  .auth-card .card-body { padding: 1.4rem; }
}

@media print {
  .sidebar, .main-top, .topbar, .no-print, .toasts { display: none !important; }
  .shell { display: block; }
  body { background: #fff; color: #000; }
  .card { box-shadow: none; border-color: #ccc; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* Prepínač jazyka */
.lang-switch { display: inline-flex; gap: 2px; padding: 2px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); }
.lang-btn { border: 0; background: none; cursor: pointer; font: inherit; font-size: .72rem; font-weight: 700; color: var(--muted); padding: .2rem .5rem; border-radius: 999px; line-height: 1; }
.lang-btn:hover { color: var(--text); }
.lang-btn.is-active { background: var(--primary); color: #fff; }