/* Kartai — класи застосунку. Порядок підключення: base.css → kartai-theme.css → kartai-components.css.
   Усі значення — з токенів; одна точка перелому: 860px. */

/* ── каркас ─────────────────────────────────────────── */
.k-app { display: flex; height: 100dvh; overflow: hidden; background: var(--color-bg); color: var(--color-text); }
.k-sidebar { display: none; width: 236px; flex: none; flex-direction: column; gap: 22px; padding: 20px 14px; border-right: 1px solid var(--color-divider); }
.k-main { flex: 1; min-width: 0; display: flex; flex-direction: column; position: relative; }
.k-header { flex: none; display: flex; align-items: center; gap: 8px; min-height: 58px; padding: 8px 8px 8px 16px; padding-top: max(8px, env(safe-area-inset-top)); position: relative; z-index: 5; background: var(--color-bg); }
.k-header__title { display: none; margin: 0; font-size: 26px; }
.k-brand { font-family: var(--font-heading); font-weight: 600; font-size: 24px; letter-spacing: -0.01em; }
.k-scroll { flex: 1; overflow-y: auto; overflow-x: hidden; overscroll-behavior: contain; }
.k-content { max-width: 920px; margin: 0 auto; padding: 22px 18px 40px; display: flex; flex-direction: column; gap: 26px; }
.k-tabbar { flex: none; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); padding: 0 4px env(safe-area-inset-bottom); border-top: 1px solid var(--color-divider); background: var(--color-surface); }

@media (min-width: 860px) {
  .k-sidebar { display: flex; }
  .k-tabbar, .k-header .k-brand, .k-header .k-streak { display: none; }
  .k-header__title { display: block; }
}

/* ── навігація ──────────────────────────────────────── */
.k-tab { position: relative; isolation: isolate; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; min-height: 64px; font-size: 11px; color: inherit; text-decoration: none; }
.k-tab[aria-current="page"] { color: var(--color-accent-700); font-weight: 600; }
.k-tab[aria-current="page"]::before { content: ""; position: absolute; z-index: -1; top: 7px; left: 50%; width: 58px; height: 30px; margin-left: -29px; border-radius: 999px; background: var(--color-accent-100); }
.k-side-link { position: relative; isolation: isolate; display: flex; align-items: center; gap: 12px; min-height: 44px; padding: 0 12px; font-size: 15px; color: inherit; text-decoration: none; border-radius: var(--radius-md); }
.k-side-link:hover { background: var(--color-neutral-100); }
.k-side-link[aria-current="page"] { background: var(--color-accent-100); color: var(--color-accent-700); font-weight: 600; }
.k-side-link .tag { margin-left: auto; }

/* ── типографіка ────────────────────────────────────── */
.k-kicker { font-size: 13px; font-weight: 600; color: var(--color-accent-700); }
.k-word { font-family: var(--font-heading); font-weight: 600; line-height: 1.1; letter-spacing: -0.01em; overflow-wrap: anywhere; }
.k-word--xl { font-size: 44px; } .k-word--lg { font-size: 38px; } .k-word--md { font-size: 21px; }
.k-num { font-family: var(--font-heading); font-weight: 600; line-height: 1; }
.k-num--hero { font-size: 60px; letter-spacing: -0.02em; } .k-num--stat { font-size: 40px; }

/* ── блоки ──────────────────────────────────────────── */
.k-hero { background: var(--color-accent-100); border-color: transparent; box-shadow: none; padding: 24px 22px; display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); align-items: end; }
.k-cells { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.k-quick { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.k-quick .btn { flex-direction: column; min-height: 76px; gap: 6px; font-size: 14px; }
.k-row { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 56px; padding: 10px 4px; background: none; border: 0; border-bottom: 1px solid var(--color-divider); text-align: left; cursor: pointer; color: inherit; font: inherit; }
.k-row:hover { background: var(--color-neutral-100); }
.k-ellipsis { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── індикатори ─────────────────────────────────────── */
.k-progress { height: 8px; border-radius: 999px; overflow: hidden; background: var(--color-neutral-200); }
.k-progress > span { display: block; height: 100%; background: var(--color-accent); transition: width .4s; }
.k-dots { display: flex; gap: 3px; }
.k-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-neutral-200); }
.k-dot.is-on { background: var(--color-accent); }
.k-day { width: 26px; height: 26px; max-width: 100%; border-radius: 50%; border: 2px solid var(--color-accent-300); }
.k-day.is-done { background: var(--color-accent); border-color: var(--color-accent); }
.k-day.is-freeze { background: var(--color-accent-2-200); border-color: var(--color-accent-2-400); }
.k-bars { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 6px; align-items: end; }
.k-bar { width: 100%; border-radius: 8px; background: var(--color-accent-200); }
.k-bar.is-today { background: var(--color-accent); }

/* ── контроли ───────────────────────────────────────── */
.k-switch { width: 50px; height: 28px; flex: none; padding: 0; position: relative; cursor: pointer; border-radius: 999px; border: 1px solid var(--color-divider); background: transparent; transition: background .15s; }
.k-switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: var(--color-neutral-500); transition: left .15s; }
.k-switch[aria-checked="true"] { background: var(--color-accent); border-color: var(--color-accent); }
.k-switch[aria-checked="true"]::after { left: 25px; background: var(--color-bg); }
.k-check { flex: none; width: 22px; height: 22px; border-radius: 7px; border: 1.5px solid var(--color-accent); display: grid; place-items: center; color: var(--color-bg); }
.k-check.is-on { background: var(--color-accent); }
.seg.k-seg-wrap { flex-wrap: wrap; max-width: 100%; }
.seg.k-seg-wrap .seg-opt { min-width: 0; padding: 7px 10px; justify-content: center; min-height: 40px; }
.k-chip { min-height: 40px; padding: 4px 14px; border-radius: 999px; font-size: 16px; border: 1px solid var(--color-divider); background: transparent; color: inherit; cursor: pointer; }
.k-chip.is-selected { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-bg); }
.k-chip.is-known { border-color: transparent; text-decoration: underline dotted; color: color-mix(in srgb, var(--color-text) 55%, transparent); cursor: default; }

/* ── повторення ─────────────────────────────────────── */
.k-flashcard { box-shadow: var(--shadow-md); padding: 28px 22px; min-height: 220px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; text-align: center; cursor: pointer; }
.k-flashcard[data-flipped="true"] { cursor: default; align-items: stretch; justify-content: flex-start; text-align: left; }
.k-flashcard__back { width: 100%; display: flex; flex-direction: column; gap: 14px; text-align: left; border-top: 1px solid var(--color-divider); padding-top: 16px; margin-top: 6px; }
.k-mnem { display: flex; gap: 8px; align-items: flex-start; padding: 12px 14px; border-radius: var(--radius-md); background: var(--color-accent-100); color: var(--color-accent-900); font-size: 14px; }
.k-rating { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.k-rating .btn { flex-direction: column; min-height: 68px; gap: 2px; font-size: 15px; padding: 6px 4px; min-width: 0; }
.k-rating small { font-family: var(--font-body); font-weight: 400; font-size: 12px; opacity: .75; }

/* ── чат ────────────────────────────────────────────── */
.k-bubble { max-width: min(560px, 88%); padding: 12px 14px; font-size: 15px; line-height: 1.5; white-space: pre-wrap; border-radius: 20px 20px 20px 6px; border: 1px solid var(--color-divider); background: var(--color-surface); }
.k-bubble--user { align-self: flex-end; border-radius: 20px 20px 6px 20px; border-color: transparent; background: var(--color-accent-100); }
.k-chips-scroll { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
.k-chips-scroll .btn { flex: none; white-space: nowrap; min-height: 40px; font-size: 13px; }

/* ── оверлеї й тост ─────────────────────────────────── */
.k-overlay { position: absolute; inset: 0; z-index: 25; background: var(--color-bg); display: flex; flex-direction: column; }
.k-overlay--session { z-index: 30; }
.k-overlay__bar { flex: none; display: flex; align-items: center; gap: 8px; min-height: 58px; padding: 8px 12px; padding-top: max(8px, env(safe-area-inset-top)); border-bottom: 1px solid var(--color-divider); }
.k-overlay__body { flex: 1; overflow-y: auto; }
.k-overlay__inner { max-width: 680px; margin: 0 auto; padding: 22px 20px 48px; display: flex; flex-direction: column; gap: 20px; }
.k-toast { position: absolute; z-index: 40; left: 12px; right: 12px; bottom: 74px; max-width: 520px; margin: 0 auto; display: flex; align-items: center; gap: 10px; padding: 10px 10px 10px 18px; border-radius: 18px; background: var(--color-text); color: var(--color-bg); box-shadow: var(--shadow-lg); }
.k-toast .btn { border-color: var(--color-bg); color: var(--color-bg); background: transparent; min-height: 40px; }
@media (min-width: 860px) { .k-toast { bottom: 24px; } }

/* ── скелетон ───────────────────────────────────────── */
.k-skel { height: 14px; border-radius: 999px; background: var(--color-neutral-200); animation: k-pulse 1.2s ease-in-out infinite; }
@keyframes k-pulse { 50% { opacity: .55; } }
@media (prefers-reduced-motion: reduce) { .k-skel { animation: none; } * { transition: none !important; } }