/* AI Student Calculators — kids-friendly, mobile-first */

.asc-wrap {
  --asc-bg: #f0f7ff;
  --asc-card: #ffffff;
  --asc-primary: #4f8cff;
  --asc-primary-dark: #3a6fd8;
  --asc-accent: #ffd166;
  --asc-text: #1a2b4a;
  --asc-muted: #5a6b85;
  --asc-border: #d8e4f5;
  --asc-radius: 16px;
  --asc-shadow: 0 8px 24px rgba(79, 140, 255, 0.12);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--asc-text);
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
  box-sizing: border-box;
}

.asc-wrap *,
.asc-wrap *::before,
.asc-wrap *::after {
  box-sizing: border-box;
}

.asc-page-header {
  text-align: center;
  margin-bottom: 1.25rem;
}

.asc-page-title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin: 0 0 0.35rem;
  font-weight: 700;
}

.asc-page-desc {
  margin: 0;
  color: var(--asc-muted);
  font-size: 1.05rem;
  line-height: 1.5;
}

.asc-notice {
  padding: 1rem;
  background: #fff3cd;
  border-radius: var(--asc-radius);
  color: #664d03;
}

/* ── Basic Calculator ── */

.asc-wrap--basic {
  max-width: 420px;
}

.asc-basic {
  background: var(--asc-card);
  border-radius: var(--asc-radius);
  padding: 1rem;
  box-shadow: var(--asc-shadow);
}

.asc-basic__display-wrap {
  background: var(--asc-bg);
  border: 2px solid var(--asc-border);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
}

.asc-basic__expr {
  min-height: 1.25rem;
  font-size: 0.9rem;
  color: var(--asc-muted);
  text-align: right;
  word-break: break-all;
}

.asc-basic__display {
  width: 100%;
  border: none;
  background: transparent;
  font-size: clamp(1.75rem, 6vw, 2.25rem);
  font-weight: 700;
  text-align: right;
  color: var(--asc-text);
  outline: none;
}

.asc-basic__keypad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.55rem;
}

.asc-key {
  min-height: 56px;
  border: none;
  border-radius: 12px;
  font-size: 1.35rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--asc-bg);
  color: var(--asc-text);
  transition: transform 0.1s, background 0.15s;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.asc-key:active {
  transform: scale(0.96);
}

.asc-key--op {
  background: #e8f0ff;
  color: var(--asc-primary-dark);
}

.asc-key--action {
  background: #ffe8e8;
  color: #c0392b;
}

.asc-key--zero {
  grid-column: span 2;
}

.asc-key[data-asc-key="="] {
  background: var(--asc-primary);
  color: #fff;
}

.asc-basic__history {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--asc-border);
}

.asc-basic__history h4 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.asc-basic__history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 160px;
  overflow-y: auto;
}

.asc-basic__history-list li {
  padding: 0.35rem 0;
  font-size: 0.9rem;
  color: var(--asc-muted);
  border-bottom: 1px dashed var(--asc-border);
}

/* ── Hub ── */

.asc-hub-search-wrap {
  margin-bottom: 1.25rem;
}

.asc-hub-search {
  width: 100%;
  padding: 0.85rem 1rem;
  font-size: 1rem;
  border: 2px solid var(--asc-border);
  border-radius: 999px;
  outline: none;
  background: var(--asc-card);
}

.asc-hub-search:focus {
  border-color: var(--asc-primary);
  box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.2);
}

.asc-hub-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .asc-hub-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .asc-hub-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.asc-hub-card {
  background: var(--asc-card);
  border-radius: var(--asc-radius);
  padding: 1.25rem;
  box-shadow: var(--asc-shadow);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border: 1px solid var(--asc-border);
}

.asc-hub-card__icon {
  font-size: 2rem;
  line-height: 1;
}

.asc-hub-card__title {
  margin: 0;
  font-size: 1.1rem;
}

.asc-hub-card__desc {
  margin: 0;
  flex: 1;
  color: var(--asc-muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.asc-hub-card.is-hidden {
  display: none;
}

/* ── Calculator panels (hub modal-style) ── */

.asc-hub-panels {
  margin-top: 1.5rem;
}

.asc-calc-panel {
  background: var(--asc-card);
  border-radius: var(--asc-radius);
  padding: 1.25rem;
  box-shadow: var(--asc-shadow);
  border: 2px solid var(--asc-primary);
  margin-bottom: 1rem;
}

.asc-calc-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.asc-calc-panel__head h3 {
  margin: 0;
  font-size: 1.15rem;
}

/* ── Shared tool UI ── */

.asc-tool label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 600;
  font-size: 0.95rem;
}

.asc-tool input,
.asc-tool select {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.65rem 0.75rem;
  font-size: 1rem;
  border: 2px solid var(--asc-border);
  border-radius: 10px;
  background: #fff;
}

.asc-tool input:focus,
.asc-tool select:focus {
  border-color: var(--asc-primary);
  outline: none;
}

.asc-grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

.asc-grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

@media (min-width: 560px) {
  .asc-grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .asc-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.asc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  touch-action: manipulation;
  transition: background 0.15s, transform 0.1s;
}

.asc-btn:active {
  transform: scale(0.98);
}

.asc-btn--primary {
  background: var(--asc-primary);
  color: #fff;
  margin-top: 0.25rem;
  margin-bottom: 0.75rem;
}

.asc-btn--primary:hover {
  background: var(--asc-primary-dark);
}

.asc-btn--ghost {
  background: transparent;
  color: var(--asc-muted);
  border: 1px solid var(--asc-border);
  padding: 0.45rem 0.85rem;
  font-size: 0.9rem;
}

.asc-result {
  background: var(--asc-bg);
  border-radius: 12px;
  padding: 1rem;
  font-size: 1.05rem;
  line-height: 1.55;
  min-height: 2.5rem;
}

.asc-result:empty {
  display: none;
}

.asc-result strong {
  color: var(--asc-primary-dark);
}

.asc-steps {
  margin-top: 0.75rem;
  padding: 0.85rem 1rem;
  background: #fffbe6;
  border-radius: 12px;
  border-left: 4px solid var(--asc-accent);
  font-size: 0.95rem;
  line-height: 1.6;
}

.asc-steps ol {
  margin: 0.5rem 0 0;
  padding-left: 1.25rem;
}

.asc-error {
  color: #c0392b;
  font-size: 0.95rem;
  margin: 0 0 0.5rem;
  font-weight: 600;
}

.asc-table-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.35rem;
  margin-top: 0.5rem;
}

.asc-table-grid span {
  background: #fff;
  padding: 0.4rem 0.5rem;
  border-radius: 8px;
  text-align: center;
  font-size: 0.95rem;
}

.asc-quiz-box {
  background: #fff;
  padding: 1rem;
  border-radius: 12px;
  margin-top: 0.5rem;
}

.asc-quiz-box input {
  width: 80px;
  display: inline-block;
  margin: 0 0.35rem;
}

/* ── Theme-safe buttons (fix image/icon overrides) ── */

.asc-wrap button,
.asc-wrap .asc-btn,
.asc-wrap .asc-key,
.asc-wrap .asc-launcher-btn,
.asc-wrap .asc-hub-card,
.asc-wrap .asc-modal__close {
  -webkit-appearance: none !important;
  appearance: none !important;
  background-image: none !important;
  pointer-events: auto !important;
  cursor: pointer !important;
  user-select: none;
}

.asc-wrap .asc-btn,
.asc-wrap .asc-hub-open {
  position: relative;
  z-index: 2;
  text-decoration: none !important;
  line-height: 1.3;
  width: 100%;
  margin-top: auto;
}

.asc-wrap .asc-hub-card {
  cursor: pointer;
  position: relative;
  transition: transform 0.15s, box-shadow 0.15s;
}

.asc-wrap .asc-hub-card:hover,
.asc-wrap .asc-hub-card:focus {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(79, 140, 255, 0.18);
  outline: 2px solid var(--asc-primary);
  outline-offset: 2px;
}

/* ── Modal ── */

body.asc-modal-open {
  overflow: hidden;
}

.asc-modal {
  position: fixed;
  inset: 0;
  z-index: 999999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.asc-modal[hidden] {
  display: none !important;
}

.asc-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  cursor: pointer;
}

.asc-modal__dialog {
  position: relative;
  z-index: 2;
  width: min(100%, 640px);
  max-height: min(92vh, 900px);
  overflow: auto;
  background: #fff;
  border-radius: var(--asc-radius);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  animation: ascModalIn 0.2s ease;
}

.asc-modal__dialog--calc {
  width: min(100%, 440px);
}

@keyframes ascModalIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.asc-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.15rem;
  border-bottom: 1px solid var(--asc-border);
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 3;
}

.asc-modal__head h3 {
  margin: 0;
  font-size: 1.15rem;
}

.asc-modal__close {
  min-width: 40px;
  min-height: 40px;
  border: none;
  border-radius: 10px;
  background: var(--asc-bg);
  color: var(--asc-text);
  font-size: 1.5rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.asc-modal__body {
  padding: 1rem 1.15rem 1.25rem;
}

.asc-hub-panels--source {
  display: none !important;
}

/* ── Launcher button ── */

.asc-launcher-float {
  position: fixed;
  z-index: var(--asc-l-z, 99999);
  pointer-events: none;
}

.asc-launcher-float--bottom-right {
  right: 18px;
  bottom: 18px;
}

.asc-launcher-float--bottom-left {
  left: 18px;
  bottom: 18px;
}

.asc-launcher-float--top-right {
  right: 18px;
  top: 18px;
}

.asc-launcher-float--top-left {
  left: 18px;
  top: 18px;
}

.asc-launcher-btn {
  pointer-events: auto !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--asc-l-min, 52px);
  padding: var(--asc-l-py, 14px) var(--asc-l-px, 20px);
  border: none;
  border-radius: var(--asc-l-radius, 50px);
  background: var(--asc-l-bg, #4f8cff) !important;
  color: var(--asc-l-color, #fff) !important;
  font-size: var(--asc-l-font, 16px);
  font-weight: 700;
  box-shadow: var(--asc-l-shadow, 0 8px 28px rgba(0, 0, 0, 0.22));
  transition: background 0.15s, transform 0.1s;
}

.asc-launcher-btn:hover,
.asc-launcher-btn:focus {
  background: var(--asc-l-hover, #3a6fd8) !important;
  transform: translateY(-1px);
}

.asc-launcher-btn__inner {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.asc-launcher-btn__icon {
  font-size: var(--asc-l-icon-size, 1.35rem);
  line-height: 1;
}

.asc-launcher-btn__img {
  width: 1.4em;
  height: 1.4em;
  object-fit: contain;
  display: block;
}

.asc-wrap--launcher-inline,
.asc-wrap--basic-trigger {
  text-align: center;
}

.asc-wrap--launcher-inline .asc-launcher-btn--inline,
.asc-wrap--basic-trigger .asc-launcher-btn--inline {
  margin: 0.5rem auto;
}