/**
 * CS Booking — Frontend Calendar Styles
 * ------------------------------------------------------------------
 * Fully theme-able via CSS custom properties.
 * A parent page/landing may re-skin the widget by overriding any of
 * the --csb-* tokens declared on .csb-booking.
 *
 * Shipped presets:
 *   .csb-booking              → dark (default)
 *   .csb-booking--light       → light surface
 *   .neural-section--light .csb-booking → auto light + neural palette
 *
 * @package CS_Booking
 */

/* ============================================================
   1. TOKENS — the public theming API
   ============================================================ */
.csb-booking {
  /* surfaces */
  --csb-surface:           #0d1426;
  --csb-surface-elev:      rgba(255,255,255,.04);
  --csb-surface-elev-2:    rgba(255,255,255,.03);
  --csb-surface-hover:     rgba(124,58,237,.12);

  /* borders */
  --csb-border:            rgba(148,163,184,.12);
  --csb-border-strong:     rgba(148,163,184,.22);
  --csb-border-accent:     rgba(124,58,237,.35);

  /* text */
  --csb-text:              rgba(230,236,245,.9);
  --csb-text-strong:       #fff;
  --csb-text-muted:        rgba(230,236,245,.6);
  --csb-text-dim:          rgba(230,236,245,.35);

  /* brand */
  --csb-accent:            #7C3AED;
  --csb-accent-2:          #6366F1;
  --csb-accent-3:          #06B6D4;
  --csb-accent-text:       #A78BFA;
  --csb-accent-soft:       rgba(124,58,237,.12);
  --csb-accent-glow:       rgba(124,58,237,.35);
  --csb-gradient:          linear-gradient(135deg, var(--csb-accent) 0%, var(--csb-accent-2) 50%, var(--csb-accent-3) 100%);
  --csb-gradient-pill:     linear-gradient(135deg, var(--csb-accent), var(--csb-accent-2));

  /* state */
  --csb-error:             #F87171;
  --csb-error-soft:        rgba(248,113,113,.12);
  --csb-taken:             rgba(230,236,245,.25);

  /* holidays / weekends (overridable from landing) */
  --csb-holiday:           #F43F5E;
  --csb-holiday-soft:      rgba(244,63,94,.14);
  --csb-weekend-text:      rgba(230,236,245,.42);

  /* shape */
  --csb-radius-sm:         8px;
  --csb-radius:            12px;
  --csb-radius-lg:         16px;
  --csb-radius-xl:         20px;

  /* elevation */
  --csb-shadow:            0 20px 50px -22px rgba(0,0,0,.5);
  --csb-shadow-selected:   0 8px 24px -6px var(--csb-accent-glow);
  --csb-shadow-btn:        0 14px 32px -12px var(--csb-accent-glow);
  --csb-shadow-btn-hover:  0 20px 44px -14px rgba(124,58,237,.55);

  /* typography */
  --csb-font:              'Inter', system-ui, -apple-system, sans-serif;
  --csb-font-mono:         'JetBrains Mono', 'Fira Code', monospace;

  /* ── baseline ── */
  font-family: var(--csb-font);
  color: var(--csb-text);
  max-width: 860px;
  margin: 0 auto;
}
.csb-booking * { box-sizing: border-box; }

/* ============================================================
   2. LIGHT PRESET — drop-in light surface
   ============================================================ */
.csb-booking--light,
.neural-section--light .csb-booking,
.section--light .csb-booking {
  --csb-surface:           #ffffff;
  --csb-surface-elev:      #F6F7FB;
  --csb-surface-elev-2:    #EEF1F7;
  --csb-surface-hover:     rgba(99,102,241,.08);

  --csb-border:            #E5E9F0;
  --csb-border-strong:     #D4DAE6;
  --csb-border-accent:     rgba(99,102,241,.32);

  --csb-text:              #1e293b;
  --csb-text-strong:       #0B1220;
  --csb-text-muted:        #64748B;
  --csb-text-dim:          #94A3B8;

  --csb-accent-text:       #4F46E5;
  --csb-accent-soft:       rgba(99,102,241,.08);
  --csb-accent-glow:       rgba(79,70,229,.28);

  --csb-taken:             #E5E9F0;
  --csb-shadow:            0 30px 60px -30px rgba(15,23,42,.18);

  --csb-holiday:           #E11D48;
  --csb-holiday-soft:      rgba(225,29,72,.09);
  --csb-weekend-text:      #94A3B8;
}

/* ============================================================
   3. SECTION / STEP LABEL
   ============================================================ */
.csb-section-label {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--csb-text-strong);
  margin: 0 0 22px;
  letter-spacing: -.01em;
}
.csb-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  background: var(--csb-gradient-pill);
  color: #fff;
  border-radius: 50%;
  font-size: .86rem;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: var(--csb-shadow-selected);
}

/* ============================================================
   4. PICKER — 2-column layout (times | month)
   ============================================================ */
.csb-picker {
  display: grid;
  grid-template-columns: minmax(220px, 280px) 1fr;
  gap: 24px;
  margin-bottom: 22px;
  align-items: stretch;
}
@media (max-width: 720px) {
  .csb-picker {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* ── LEFT: times column ── */
.csb-times {
  display: flex;
  flex-direction: column;
  background: var(--csb-surface-elev);
  border: 1px solid var(--csb-border);
  border-radius: var(--csb-radius-lg);
  overflow: hidden;
  order: 1;
  align-self: start;             /* nie rozciągaj do wysokości kalendarza */
  max-height: 100%;
  width: 100%;
}
@media (max-width: 720px) {
  .csb-times { order: 2; align-self: stretch; }
}
.csb-times__header {
  padding: 14px 18px 12px;
  border-bottom: 1px solid var(--csb-border);
  background: var(--csb-surface);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.csb-times__label {
  font-family: var(--csb-font-mono);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--csb-text-dim);
  font-weight: 700;
}
.csb-times__date {
  font-family: var(--csb-font);
  font-size: .98rem;
  font-weight: 700;
  color: var(--csb-text-strong);
  letter-spacing: -.01em;
  min-height: 1.4em;
}
.csb-times__header--active .csb-times__label { color: var(--csb-accent-text); }

.csb-times__body {
  padding: 10px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--csb-border-strong) transparent;
  /* dopasowanie: rośnie z zawartością, ale nie przekracza kalendarza */
  max-height: 520px;
}
.csb-times__body::-webkit-scrollbar { width: 5px; }
.csb-times__body::-webkit-scrollbar-thumb {
  background: var(--csb-border-strong);
  border-radius: 4px;
}
.csb-times__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 40px 18px;
  text-align: center;
  color: var(--csb-text-muted);
  min-height: 260px;
}
.csb-times__empty svg { color: var(--csb-text-dim); opacity: .55; }
.csb-times__empty strong {
  display: block;
  font-size: .95rem;
  font-weight: 700;
  color: var(--csb-text);
}
.csb-times__empty span {
  display: block;
  font-size: .82rem;
  line-height: 1.5;
  color: var(--csb-text-muted);
  max-width: 220px;
}

.csb-tlist {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}
@media (max-width: 420px) {
  .csb-tlist { grid-template-columns: repeat(3, 1fr); }
}

.csb-tbtn {
  display: block;
  width: 100%;
  padding: 10px 6px;
  border: 1px solid var(--csb-border);
  border-radius: var(--csb-radius-sm);
  background: var(--csb-surface);
  color: var(--csb-text);
  font-family: var(--csb-font-mono);
  font-size: .88rem;
  font-weight: 600;
  letter-spacing: .01em;
  text-align: center;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.csb-tbtn:hover {
  background: var(--csb-surface-hover);
  border-color: var(--csb-border-accent);
  color: var(--csb-accent-text);
  transform: translateY(-1px);
}
.csb-tbtn--taken {
  opacity: .35;
  cursor: not-allowed;
  text-decoration: line-through;
  color: var(--csb-text-dim);
  background: var(--csb-taken);
  border-color: transparent;
}
.csb-tbtn--taken:hover {
  background: var(--csb-taken);
  border-color: transparent;
  color: var(--csb-text-dim);
  transform: none;
}
.csb-tbtn--selected {
  background: var(--csb-gradient-pill) !important;
  border-color: transparent !important;
  color: #fff !important;
  font-weight: 700;
  box-shadow: var(--csb-shadow-selected);
  transform: translateY(-1px);
}
.csb-tbtn--selected:hover { color: #fff !important; }

/* ── RIGHT: month column ── */
.csb-month {
  display: flex;
  flex-direction: column;
  background: var(--csb-surface-elev);
  border: 1px solid var(--csb-border);
  border-radius: var(--csb-radius-lg);
  overflow: hidden;
  padding: 18px 18px 22px;
  order: 2;
}
@media (max-width: 720px) {
  .csb-month { order: 1; padding: 14px 14px 18px; }
}
.csb-month__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}
.csb-month__btn {
  background: var(--csb-surface);
  border: 1px solid var(--csb-border);
  color: var(--csb-text-muted);
  border-radius: var(--csb-radius-sm);
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background .25s ease, border-color .25s ease, color .25s ease, transform .25s ease;
  flex-shrink: 0;
}
.csb-month__btn:hover {
  background: var(--csb-surface-hover);
  border-color: var(--csb-border-accent);
  color: var(--csb-accent-text);
  transform: translateY(-1px);
}
.csb-month__btn:disabled {
  opacity: .3;
  cursor: not-allowed;
  transform: none;
}
.csb-month__label {
  flex: 1;
  text-align: center;
  font-family: var(--csb-font);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--csb-text-strong);
  letter-spacing: -.01em;
}
.csb-month__dows {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 8px;
  padding: 0 2px;
}
.csb-month__dows span {
  text-align: center;
  font-family: var(--csb-font-mono);
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--csb-text-dim);
  padding: 6px 0;
}
.csb-month__grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  position: relative;
  min-height: 280px;
}
.csb-month__empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--csb-surface-elev);
  color: var(--csb-text-muted);
  font-size: .88rem;
  font-weight: 500;
  text-align: center;
  padding: 20px;
  border-radius: var(--csb-radius);
}

/* Day cell */
.csb-dcell {
  aspect-ratio: 1 / 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--csb-radius-sm);
  color: var(--csb-text);
  font-family: var(--csb-font);
  font-size: .92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
  position: relative;
}
.csb-dcell--outside { color: transparent; pointer-events: none; }
.csb-dcell--past,
.csb-dcell--weekend,
.csb-dcell--disabled {
  color: var(--csb-text-dim);
  cursor: not-allowed;
}
.csb-dcell--past { text-decoration: line-through; opacity: .55; }

.csb-dcell--weekend {
  background: var(--csb-surface);
  color: var(--csb-weekend-text);
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
  text-decoration-color: currentColor;
  opacity: .85;
}

/* Święta — priorytet nad weekendem: czerwony akcent + kropka */
.csb-dcell--holiday {
  background: var(--csb-holiday-soft) !important;
  color: var(--csb-holiday) !important;
  text-decoration: none !important;
  opacity: 1;
  font-weight: 700;
}
.csb-dcell--holiday::after {
  content: '';
  position: absolute;
  bottom: 6px; left: 50%;
  transform: translateX(-50%);
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--csb-holiday);
  opacity: .9;
}
/* gdy święto wypada w weekend — zachowujemy czerwony look, bez przekreślenia */
.csb-dcell--weekend.csb-dcell--holiday {
  text-decoration: none;
}

.csb-dcell--available {
  background: var(--csb-surface);
  border-color: var(--csb-border);
  color: var(--csb-text-strong);
  font-weight: 700;
}
.csb-dcell--available::after {
  /* dot indicator — dzień ma wolne sloty */
  content: '';
  position: absolute;
  bottom: 6px; left: 50%;
  transform: translateX(-50%);
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--csb-accent-2);
  opacity: .7;
}
.csb-dcell--available:hover {
  background: var(--csb-surface-hover);
  border-color: var(--csb-border-accent);
  color: var(--csb-accent-text);
  transform: translateY(-1px);
  box-shadow: 0 6px 14px -8px var(--csb-accent-glow);
}
.csb-dcell--today {
  box-shadow: inset 0 0 0 1.5px var(--csb-border-accent);
}
.csb-dcell--selected,
.csb-dcell--available.csb-dcell--selected {
  background: var(--csb-gradient-pill) !important;
  border-color: transparent !important;
  color: #fff !important;
  box-shadow: var(--csb-shadow-selected);
  transform: translateY(-1px);
}
.csb-dcell--selected::after {
  background: #fff;
  opacity: 1;
}
.csb-dcell--selected:hover { color: #fff !important; }

@media (max-width: 480px) {
  .csb-dcell { font-size: .86rem; }
  .csb-month__label { font-size: .95rem; }
}

/* ============================================================
   6. SELECTED-SLOT CONFIRMATION BAR
   ============================================================ */
.csb-selected-slot {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: var(--csb-accent-soft);
  border: 1px solid var(--csb-border-accent);
  border-radius: var(--csb-radius);
  margin-bottom: 22px;
  font-size: .95rem;
  font-weight: 700;
  color: var(--csb-accent-text);
}
.csb-selected-slot svg { flex-shrink: 0; }
.csb-change-btn {
  margin-left: auto;
  background: var(--csb-surface-elev);
  border: 1px solid var(--csb-border-strong);
  color: var(--csb-text-muted);
  border-radius: var(--csb-radius-sm);
  padding: 6px 14px;
  font-size: .8rem;
  font-weight: 600;
  font-family: var(--csb-font);
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.csb-change-btn:hover {
  background: var(--csb-surface-elev-2);
  color: var(--csb-text-strong);
  border-color: var(--csb-border-accent);
}

/* ============================================================
   7. FORM
   ============================================================ */
.csb-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 0;
}
@media (max-width: 560px) {
  .csb-form-row { grid-template-columns: 1fr; gap: 0; }
}
.csb-form-group { margin-bottom: 16px; }
.csb-form-group label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  color: var(--csb-text);
  margin-bottom: 6px;
  letter-spacing: -.003em;
}
.csb-req { color: var(--csb-error); font-weight: 700; }

.csb-form-group input,
.csb-form-group textarea,
.csb-form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--csb-border);
  border-radius: var(--csb-radius-sm);
  background: var(--csb-surface);
  color: var(--csb-text-strong);
  font-family: var(--csb-font);
  font-size: .92rem;
  font-weight: 500;
  transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
  -webkit-appearance: none;
  appearance: none;
}
.csb-form-group input::placeholder,
.csb-form-group textarea::placeholder {
  color: var(--csb-text-dim);
  font-weight: 400;
}
.csb-form-group select {
  color: var(--csb-text);
  cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%),
                    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 32px;
}
.csb-form-group select option {
  background: var(--csb-surface);
  color: var(--csb-text-strong);
}
.csb-form-group input:focus,
.csb-form-group textarea:focus,
.csb-form-group select:focus {
  outline: none;
  border-color: var(--csb-accent-2);
  box-shadow: 0 0 0 3px var(--csb-accent-soft);
}
.csb-form-group textarea {
  resize: vertical;
  min-height: 90px;
  line-height: 1.55;
}

.csb-error {
  display: block;
  font-size: .78rem;
  color: var(--csb-error);
  margin-top: 4px;
  min-height: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: all .25s ease;
}
.csb-error.visible {
  max-height: 2.4rem;
  opacity: 1;
  margin-top: 5px;
}
.csb-input--error {
  border-color: var(--csb-error) !important;
  box-shadow: 0 0 0 3px var(--csb-error-soft) !important;
}

/* ============================================================
   8. RODO CHECKBOX
   ============================================================ */
.csb-rodo { margin: 18px 0 22px; }
.csb-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  position: relative;
}
.csb-checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0; width: 0; height: 0;
}
.csb-checkmark {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border: 2px solid var(--csb-border-strong);
  border-radius: 5px;
  background: var(--csb-surface);
  margin-top: 1px;
  position: relative;
  transition: background .2s ease, border-color .2s ease;
}
.csb-checkmark::after {
  content: '';
  position: absolute;
  top: 2px; left: 6px;
  width: 5px; height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
  transition: transform .2s ease;
}
.csb-checkbox input:checked ~ .csb-checkmark {
  background: var(--csb-accent);
  border-color: var(--csb-accent);
}
.csb-checkbox input:checked ~ .csb-checkmark::after {
  transform: rotate(45deg) scale(1);
}
.csb-checkbox input:focus-visible ~ .csb-checkmark {
  box-shadow: 0 0 0 3px var(--csb-accent-soft);
}
.csb-checkbox-text {
  font-size: .82rem;
  color: var(--csb-text-muted);
  line-height: 1.55;
}
.csb-checkbox-text strong { color: var(--csb-text); font-weight: 700; }
.csb-checkbox-text a {
  color: var(--csb-accent-text);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ============================================================
   9. SUBMIT BUTTON — premium CTA z shimmerem
   ============================================================ */
.csb-submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 18px 32px;
  background: var(--csb-gradient);
  border: none;
  border-radius: 14px;
  color: #fff;
  font-family: var(--csb-font);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -.01em;
  cursor: pointer;
  transition: transform .35s cubic-bezier(.4,0,.2,1), box-shadow .35s cubic-bezier(.4,0,.2,1), filter .25s ease;
  box-shadow:
    0 18px 38px -14px var(--csb-accent-glow),
    0 0 0 1px rgba(255,255,255,.08) inset;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  margin-top: 6px;
}
.csb-submit-btn svg {
  flex-shrink: 0;
  transition: transform .35s cubic-bezier(.4,0,.2,1);
}
/* Alternate gradient — fade-in na hover */
.csb-submit-btn::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--csb-accent-3) 0%, var(--csb-accent-2) 50%, var(--csb-accent) 100%);
  opacity: 0;
  transition: opacity .45s ease;
  z-index: -1;
}
/* Shimmer — przebiegający poblysk */
.csb-submit-btn::after {
  content: '';
  position: absolute;
  top: 0; left: -60%;
  width: 40%; height: 100%;
  background: linear-gradient(120deg, transparent 0%, rgba(255,255,255,.28) 50%, transparent 100%);
  transform: skewX(-20deg);
  transition: left .7s cubic-bezier(.4,0,.2,1);
  pointer-events: none;
  z-index: 0;
}
.csb-submit-btn > * { position: relative; z-index: 1; }
.csb-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow:
    0 26px 52px -16px var(--csb-accent-glow),
    0 0 0 1px rgba(255,255,255,.14) inset;
  filter: brightness(1.05);
}
.csb-submit-btn:hover::before { opacity: 1; }
.csb-submit-btn:hover::after  { left: 120%; }
.csb-submit-btn:hover svg     { transform: translateX(2px) scale(1.06); }
.csb-submit-btn:active {
  transform: translateY(0);
  filter: brightness(.98);
}
.csb-submit-btn:focus-visible {
  outline: none;
  box-shadow:
    0 26px 52px -16px var(--csb-accent-glow),
    0 0 0 3px rgba(255,255,255,.6),
    0 0 0 5px var(--csb-accent-2);
}
.csb-submit-btn:disabled {
  opacity: .55;
  cursor: not-allowed;
  transform: none;
  filter: grayscale(.2);
}
.csb-submit-btn:disabled:hover::after { left: -60%; }
.csb-submit-btn--loading { pointer-events: none; }
.csb-submit-btn--loading span,
.csb-submit-btn--loading svg { opacity: 0; }
.csb-submit-btn--loading::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 22px; height: 22px;
  margin: -11px 0 0 -11px;
  border: 3px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  background: transparent;
  transform: none;
  animation: csb-spin .7s linear infinite;
  z-index: 2;
}

/* ============================================================
   10. SUCCESS STATE
   ============================================================ */
.csb-step--success {
  text-align: center;
  padding: 44px 22px;
}
.csb-success-icon {
  margin-bottom: 18px;
  animation: csb-bounce .6s cubic-bezier(.34,1.56,.64,1);
}
.csb-success-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--csb-text-strong);
  margin: 0 0 12px;
  letter-spacing: -.015em;
}
.csb-success-text {
  font-size: 1rem;
  color: var(--csb-accent-text);
  font-weight: 700;
  margin: 0 0 16px;
}
.csb-success-note {
  font-size: .88rem;
  color: var(--csb-text-muted);
  margin: 0;
  line-height: 1.6;
  max-width: 460px;
  margin-inline: auto;
}

/* ============================================================
   11. LOADING / EMPTY
   ============================================================ */
.csb-loading {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 50px 20px;
  gap: 14px;
  color: var(--csb-text-muted);
  font-size: .88rem;
  font-weight: 500;
}
.csb-spinner {
  width: 30px; height: 30px;
  border: 3px solid var(--csb-border);
  border-top-color: var(--csb-accent-2);
  border-radius: 50%;
  animation: csb-spin .7s linear infinite;
}
.csb-no-slots {
  grid-column: 1 / -1;
  text-align: center;
  padding: 50px 20px;
  color: var(--csb-text-muted);
  font-size: .92rem;
  font-weight: 500;
}

/* ============================================================
   12. ANIMATIONS
   ============================================================ */
@keyframes csb-spin {
  to { transform: rotate(360deg); }
}
@keyframes csb-bounce {
  0%   { transform: scale(.5); opacity: 0; }
  60%  { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes csb-fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.csb-dcell--available { animation: csb-fadeIn .25s ease both; }
.csb-tbtn { animation: csb-fadeIn .2s ease both; }

@media (prefers-reduced-motion: reduce) {
  .csb-dcell,
  .csb-tbtn,
  .csb-submit-btn,
  .csb-success-icon,
  .csb-spinner {
    animation: none !important;
    transition: none !important;
  }
}