.ev4x-memory,
.ev4x-memory * {
  box-sizing: border-box;
}

.ev4x-memory {
  --bg-1: #0f172a;
  --bg-2: #111827;
  --card: #ffffff;
  --ink: #e5eefc;
  --muted: #bfd0ec;
  --accent: #8b5cf6;
  --accent-2: #06b6d4;
  --line: rgba(255,255,255,.14);
  --shadow: 0 24px 80px rgba(2, 8, 23, .42);
  margin: 28px auto;
  max-width: 980px;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.ev4x-memory__shell {
  background:
    radial-gradient(circle at top right, rgba(139,92,246,.24), transparent 30%),
    radial-gradient(circle at bottom left, rgba(6,182,212,.20), transparent 28%),
    linear-gradient(135deg, var(--bg-1), var(--bg-2));
  color: var(--ink);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,.08);
}

.ev4x-memory__header,
.ev4x-memory__status,
.ev4x-memory__history-head,
.ev4x-memory__tools {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.ev4x-memory__title {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.1;
  color: #fff;
}

.ev4x-memory__subtitle {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.ev4x-memory__controls {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.ev4x-memory__mode,
.ev4x-memory__button,
.ev4x-memory__center,
.ev4x-memory__custom-input {
  font: inherit;
}

.ev4x-memory__mode,
.ev4x-memory__button,
.ev4x-memory__center {
  border: 0;
  border-radius: 16px;
}

.ev4x-memory__mode {
  background: rgba(255,255,255,.08);
  color: #fff;
  padding: 12px 14px;
  min-width: 210px;
  height: 50px;
  line-height: 1.2;
  border: 1px solid rgba(255,255,255,.12);
  appearance: none;
}

.ev4x-memory__mode option {
  color: #0f172a;
  background: #f8fafc;
}

.ev4x-memory__mode option:checked,
.ev4x-memory__mode option:hover,
.ev4x-memory__mode option:focus {
  color: #ffffff;
  background: #2563eb;
}

.ev4x-memory__button {
  min-height: 50px;
  padding: 12px 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 700;
  line-height: 1.2;
  transition: transform .2s ease, opacity .2s ease, background .2s ease;
}

.ev4x-memory__button:hover,
.ev4x-memory__pad:hover {
  transform: translateY(-1px);
}

.ev4x-memory__button--ghost {
  background: rgba(255,255,255,.08);
  color: #fff;
  border: 1px solid rgba(255,255,255,.12);
}

.ev4x-memory__status {
  margin: 24px 0;
  flex-wrap: wrap;
}

.ev4x-memory__pill {
  min-width: 140px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 18px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.ev4x-memory__pill span {
  color: var(--muted);
  font-size: .95rem;
}

.ev4x-memory__pill strong {
  color: #fff;
  font-size: 1.2rem;
}

.ev4x-memory__board-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  width: fit-content;
  margin: 18px auto 18px;
  padding: 22px;
  overflow: visible;
  border-radius: 42px;
  background:
    linear-gradient(rgba(10,15,30,.08), rgba(10,15,30,.16)),
    url('https://system.eduvia4x.cz/wp-content/uploads/2026/04/pozadi_obloha-2.jpg') center center / cover no-repeat;
  box-shadow:
    0 0 28px rgba(59,130,246,.10),
    0 0 52px rgba(139,92,246,.08);
}

.ev4x-memory__board {
  position: relative;
  width: min(82vw, 520px);
  height: min(82vw, 520px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 14px;
  padding: 14px;
  background:
    radial-gradient(circle at 50% 50%, rgba(59,130,246,.08), transparent 24%),
    linear-gradient(180deg, rgba(16,24,40,.98), rgba(10,16,28,.99));
  border-radius: 40px;
  border: 1px solid rgba(255,255,255,.10);
  overflow: hidden;
  isolation: isolate;
}

.ev4x-memory__board::after {
  display: none;
}

.ev4x-memory__board::before {
  content: '';
  position: absolute;
  inset: 10px;
  border-radius: 32px;
  border: 1px solid rgba(255,255,255,.06);
  pointer-events: none;
}

.ev4x-memory__pad {
  z-index: 1;
  position: relative;
  border-radius: 30px;
  min-height: 140px;
  cursor: pointer;
  border: 2px solid rgba(255,255,255,.14);
  box-shadow:
    inset 0 -12px 18px rgba(0,0,0,.18),
    inset 0 1px 0 rgba(255,255,255,.20);
  transition: transform .16s ease, filter .16s ease, box-shadow .16s ease;
  padding: 22px 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  isolation: isolate;
}

.ev4x-memory__pad--1 { background: linear-gradient(180deg, #64f27f, #23b34f); }
.ev4x-memory__pad--2 { background: linear-gradient(180deg, #ff8276, #e53935); }
.ev4x-memory__pad--3 { background: linear-gradient(180deg, #ffcf57, #f59e0b); }
.ev4x-memory__pad--4 { background: linear-gradient(180deg, #67d5ff, #0ea5e9); }

.ev4x-memory__pad.is-active {
  filter: brightness(1.28) saturate(1.12);
  box-shadow: 0 0 0 5px rgba(255,255,255,.22), 0 0 30px rgba(255,255,255,.25);
}

.ev4x-memory__num {
  position: absolute;
  top: 14px;
  left: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  background: rgba(15,23,42,.30);
  color: #fff;
  font-weight: 800;
  font-size: 1rem;
  backdrop-filter: blur(4px);
}

.ev4x-memory__pad--2 .ev4x-memory__num,
.ev4x-memory__pad--4 .ev4x-memory__num {
  left: auto;
  right: 16px;
}

.ev4x-memory__label {
  position: relative;
  z-index: 1;
  display: block;
  max-width: calc(100% - 28px);
  color: rgba(255,255,255,.96);
  font-weight: 800;
  font-size: clamp(.9rem, 2.3vw, 1.14rem);
  line-height: 1.15;
  text-shadow: 0 2px 10px rgba(0,0,0,.32);
  word-break: break-word;
}

.ev4x-memory--hide-numbers .ev4x-memory__num {
  display: none;
}

.ev4x-memory--hide-text .ev4x-memory__label {
  visibility: hidden;
}

.ev4x-memory__center {
  z-index: 3;
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  width: 138px;
  height: 138px;
  border-radius: 38px;
  background:
    radial-gradient(circle at 50% 36%, rgba(255,255,255,.12), transparent 38%),
    linear-gradient(180deg, #24314f, #10192d);
  color: #fff;
  font-size: 1rem;
  font-weight: 800;
  box-shadow: 0 16px 34px rgba(0,0,0,.38);
  border: 1px solid rgba(128,188,255,.42);
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
}

.ev4x-memory__center::before {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 32px;
  border: 1px solid rgba(255,255,255,.18);
  pointer-events: none;
}

.ev4x-memory__center:hover {
  transform: translate(-50%, -50%) scale(1.02);
  box-shadow: 0 20px 38px rgba(0,0,0,.42), 0 0 0 6px rgba(59,130,246,.10);
  filter: brightness(1.03);
}

.ev4x-memory__center:active {
  transform: translate(-50%, -50%) scale(.98);
}

.ev4x-memory__center.is-pulse {
  box-shadow: 0 0 0 8px rgba(139,92,246,.20), 0 18px 34px rgba(0,0,0,.40);
}

.ev4x-memory__message {
  margin: 20px 0 0;
  min-height: 28px;
  color: #fff;
  font-size: 1.02rem;
  font-weight: 600;
}

.ev4x-memory__result {
  margin-top: 18px;
  background: linear-gradient(180deg, rgba(14,25,48,.92), rgba(10,18,34,.96));
  border-radius: 24px;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.10);
  box-shadow: 0 16px 34px rgba(0,0,0,.24);
}

.ev4x-memory__result[hidden] {
  display: none;
}

.ev4x-memory__result-head {
  margin-bottom: 14px;
}

.ev4x-memory__result-head strong {
  color: #fff;
  font-size: 1.08rem;
}

.ev4x-memory__result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.ev4x-memory__result-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 18px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ev4x-memory__result-card span,
.ev4x-memory__result-note span {
  color: var(--muted);
  font-size: .92rem;
}

.ev4x-memory__result-card strong {
  color: #fff;
  font-size: 1.55rem;
  line-height: 1.1;
}

.ev4x-memory__result-note {
  margin-top: 14px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 18px;
  padding: 14px 16px;
}

.ev4x-memory__result-note p {
  margin: 8px 0 0;
  color: #fff;
  font-size: 1rem;
  line-height: 1.5;
  font-weight: 700;
}

.ev4x-memory__history-wrap,
.ev4x-memory__custom-wrap {
  margin-top: 20px;
  background: rgba(255,255,255,.05);
  border-radius: 22px;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.08);
}

.ev4x-memory__history-head {
  margin-bottom: 12px;
}

.ev4x-memory__history {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.ev4x-memory__history-item {
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  color: #fff;
  font-size: .95rem;
}

.ev4x-memory__history-item[data-state="ok"] {
  background: rgba(34,197,94,.18);
  border-color: rgba(34,197,94,.42);
}

.ev4x-memory__history-item[data-state="bad"] {
  background: rgba(239,68,68,.18);
  border-color: rgba(239,68,68,.42);
}

.ev4x-memory__history-item[data-state="waiting"] {
  color: var(--muted);
}

.ev4x-memory__custom-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.ev4x-memory__custom-head strong {
  color: #fff;
}

.ev4x-memory__custom-head span,
.ev4x-memory__custom-item span {
  color: var(--muted);
  font-size: .92rem;
}

.ev4x-memory__tools {
  margin-bottom: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.ev4x-memory__toggles {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.ev4x-memory__toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(15,23,42,.35);
  border: 1px solid rgba(255,255,255,.08);
  color: #fff;
  cursor: pointer;
}

.ev4x-memory__toggle input {
  margin: 0;
}

.ev4x-memory__custom-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.ev4x-memory__custom-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ev4x-memory__custom-input {
  width: 100%;
  min-height: 46px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(15,23,42,.54);
  color: #fff;
  padding: 12px 14px;
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}

.ev4x-memory__custom-input:focus {
  border-color: rgba(125,211,252,.82);
  box-shadow: 0 0 0 4px rgba(59,130,246,.14);
  background: rgba(15,23,42,.72);
}

@media (max-width: 760px) {
  .ev4x-memory__shell {
    padding: 18px;
    border-radius: 22px;
  }

  .ev4x-memory__header,
  .ev4x-memory__status,
  .ev4x-memory__history-head,
  .ev4x-memory__tools {
    align-items: stretch;
    flex-direction: column;
  }

  .ev4x-memory__controls {
    width: 100%;
  }

  .ev4x-memory__mode,
  .ev4x-memory__button,
  .ev4x-memory__fullscreen,
  .ev4x-memory__restore-pillars {
    width: 100%;
  }

  .ev4x-memory__custom-grid {
    grid-template-columns: 1fr 1fr;
  }

  .ev4x-memory__result-grid {
    grid-template-columns: 1fr;
  }

  .ev4x-memory__board {
    width: min(94vw, 460px);
    height: min(94vw, 460px);
    gap: 10px;
    padding: 10px;
  }

  .ev4x-memory__pad {
    border-radius: 24px;
    padding: 18px 12px;
  }

  .ev4x-memory__label {
    font-size: clamp(.82rem, 3vw, .98rem);
  }

  .ev4x-memory__center {
    width: 116px;
    height: 116px;
    border-radius: 30px;
    font-size: .95rem;
  }
}


/* v11.0 – skutečná obloha pouze kolem panelu */
.ev4x-memory__board-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 42px;
  pointer-events: none;
  border: 1px solid rgba(255,255,255,.08);
  background: radial-gradient(circle at center, rgba(255,255,255,.04), rgba(255,255,255,0) 70%);
}

.ev4x-memory__board-wrap::after {
  content: '';
  position: absolute;
  inset: 12px;
  border-radius: 34px;
  pointer-events: none;
  border: 1px solid rgba(255,255,255,.06);
}


/* v16.0 – sjednocení horního ovládání včetně Fullscreen */
.ev4x-memory__controls {
  align-items: center;
}

.ev4x-memory__controls > .ev4x-memory__mode,
.ev4x-memory__controls > .ev4x-memory__button {
  height: 50px;
  min-height: 50px;
  margin: 0;
  vertical-align: middle;
}

.ev4x-memory__controls > .ev4x-memory__fullscreen {
  min-width: 118px;
}

@media (min-width: 761px) {
  .ev4x-memory__controls {
    row-gap: 10px;
  }
}


/* v17.0 – výukové sady a rozšířené režimy */
.ev4x-memory__preset-wrap {
  margin-top: 20px;
  background: rgba(255,255,255,.05);
  border-radius: 22px;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.08);
}

.ev4x-memory__preset-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.ev4x-memory__preset-head strong {
  color: #fff;
}

.ev4x-memory__preset-head span,
.ev4x-memory__preset-field span,
.ev4x-memory__preset-subject {
  color: var(--muted);
  font-size: .92rem;
}

.ev4x-memory__preset-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr) auto;
  gap: 12px;
  align-items: end;
}

.ev4x-memory__preset-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ev4x-memory__preset-field select {
  width: 100%;
  min-height: 50px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(15,23,42,.54);
  color: #fff;
  padding: 12px 14px;
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
  appearance: none;
}

.ev4x-memory__preset-field select:focus {
  border-color: rgba(125,211,252,.82);
  box-shadow: 0 0 0 4px rgba(59,130,246,.14);
  background: rgba(15,23,42,.72);
}

.ev4x-memory__preset-field option {
  color: #0f172a;
  background: #f8fafc;
}

.ev4x-memory__preset-field option:checked,
.ev4x-memory__preset-field option:hover,
.ev4x-memory__preset-field option:focus {
  color: #ffffff;
  background: #2563eb;
}

.ev4x-memory__preset-apply {
  white-space: nowrap;
}

.ev4x-memory__preset-info {
  margin-top: 14px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 18px;
  padding: 14px 16px;
}

.ev4x-memory__preset-name {
  color: #fff;
  display: block;
  font-size: 1.02rem;
}

.ev4x-memory__preset-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.ev4x-memory__preset-formula {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 5px 10px;
  border-radius: 10px;
  background: rgba(15,23,42,.48);
  border: 1px solid rgba(255,255,255,.08);
  color: #fff;
  font-size: .95rem;
}

.ev4x-memory__preset-hint {
  margin: 10px 0 0;
  color: #fff;
  line-height: 1.45;
}

@media (max-width: 760px) {
  .ev4x-memory__preset-controls {
    grid-template-columns: 1fr;
  }

  .ev4x-memory__preset-apply {
    width: 100%;
  }
}


/* v19.0 – stránka s popisem aplikace */
.ev4x-memory-about {
  margin: 28px auto;
  max-width: 1100px;
  background:
    radial-gradient(circle at top right, rgba(139,92,246,.20), transparent 28%),
    radial-gradient(circle at bottom left, rgba(6,182,212,.16), transparent 24%),
    linear-gradient(135deg, #0f172a, #111827);
  color: #e5eefc;
  border-radius: 28px;
  padding: 28px;
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 24px 80px rgba(2, 8, 23, .42);
}

.ev4x-memory-about__hero {
  margin-bottom: 22px;
}

.ev4x-memory-about__eyebrow {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.10);
  color: #bfd0ec;
  font-weight: 700;
  margin-bottom: 12px;
}

.ev4x-memory-about__title {
  margin: 0;
  color: #fff;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.1;
}

.ev4x-memory-about__lead {
  margin: 12px 0 0;
  max-width: 900px;
  color: #d8e4fb;
  font-size: 1.03rem;
  line-height: 1.65;
}

.ev4x-memory-about__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.ev4x-memory-about__card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 22px;
  padding: 20px;
}

.ev4x-memory-about__card h3 {
  margin: 0 0 10px;
  color: #fff;
  font-size: 1.18rem;
}

.ev4x-memory-about__card p {
  margin: 0 0 10px;
  color: #cfe0fb;
  line-height: 1.65;
}

.ev4x-memory-about__card ul {
  margin: 0;
  padding-left: 18px;
}

.ev4x-memory-about__card li {
  margin: 8px 0;
  color: #e8f0ff;
  line-height: 1.55;
}

.ev4x-memory-about__footer {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  color: #fff;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.ev4x-memory-about__footer code {
  background: rgba(15,23,42,.55);
  color: #fff;
  padding: 4px 8px;
  border-radius: 8px;
}

@media (max-width: 760px) {
  .ev4x-memory-about {
    padding: 18px;
    border-radius: 22px;
  }

  .ev4x-memory-about__grid {
    grid-template-columns: 1fr;
  }
}


/* v20.0 – popis přímo v aplikaci */
.ev4x-memory__inline-about {
  margin-top: 20px;
  background: rgba(255,255,255,.05);
  border-radius: 22px;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.08);
}

.ev4x-memory__inline-about-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.ev4x-memory__inline-about-head strong {
  color: #fff;
  font-size: 1.08rem;
}

.ev4x-memory__inline-about-head span {
  color: #bfd0ec;
  font-size: .95rem;
}

.ev4x-memory__inline-about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.ev4x-memory__inline-about-card {
  background: rgba(15,23,42,.36);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 18px;
  padding: 16px;
}

.ev4x-memory__inline-about-card h3 {
  margin: 0 0 8px;
  color: #fff;
  font-size: 1.06rem;
}

.ev4x-memory__inline-about-card p {
  margin: 0 0 8px;
  color: #d6e4fb;
  line-height: 1.55;
}

.ev4x-memory__inline-about-card ul {
  margin: 0;
  padding-left: 18px;
}

.ev4x-memory__inline-about-card li {
  margin: 7px 0;
  color: #edf4ff;
  line-height: 1.5;
}

@media (max-width: 760px) {
  .ev4x-memory__inline-about-grid {
    grid-template-columns: 1fr;
  }
}