/* ============================================================
   MOBILE STEPPER MODAL — 3-step guided flow
   Only active on max-width: 768px
   ============================================================ */

/* ── Overlay backdrop ── */
#mob-stepper-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(6, 8, 13, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

@media (max-width: 768px) {
  #mob-stepper-backdrop.open {
    opacity: 1;
    pointer-events: auto;
  }
}

/* ── Sheet container ── */
#mob-stepper-sheet {
  width: 100%;
  max-height: 94vh;
  background: #0d1118;
  border-radius: 22px 22px 0 0;
  border: 1px solid rgba(245, 241, 232, 0.1);
  border-bottom: none;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(100%);
  transition: transform 0.38s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}
#mob-stepper-backdrop.open #mob-stepper-sheet {
  transform: translateY(0);
}

/* ── Handle bar ── */
.mst-handle {
  width: 40px;
  height: 4px;
  background: rgba(245, 241, 232, 0.2);
  border-radius: 2px;
  margin: 12px auto 0;
  flex-shrink: 0;
}

/* ── Header ── */
.mst-header {
  padding: 14px 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.mst-header-title {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(245, 241, 232, 0.5);
  font-family: var(--font-sans);
}
.mst-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(245, 241, 232, 0.14);
  background: rgba(245, 241, 232, 0.04);
  color: rgba(245, 241, 232, 0.6);
  font-size: 18px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: all 0.18s;
}
.mst-close:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ── Progress stepper bar ── */
.mst-steps {
  display: flex;
  align-items: center;
  padding: 16px 20px 12px;
  gap: 0;
  flex-shrink: 0;
}
.mst-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex: 1;
  position: relative;
}
.mst-step-circle {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid rgba(245, 241, 232, 0.2);
  background: transparent;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  color: rgba(245, 241, 232, 0.35);
  font-family: var(--font-mono);
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
}
.mst-step.active .mst-step-circle {
  border-color: var(--accent);
  background: rgba(232, 192, 137, 0.15);
  color: var(--accent);
  box-shadow: 0 0 16px rgba(232, 192, 137, 0.35);
}
.mst-step.done .mst-step-circle {
  border-color: var(--ok, #7ad79a);
  background: rgba(122, 215, 154, 0.15);
  color: var(--ok, #7ad79a);
}
.mst-step-label {
  font-size: 9.5px;
  letter-spacing: 0.06em;
  color: rgba(245, 241, 232, 0.35);
  text-align: center;
  white-space: nowrap;
  transition: color 0.3s;
}
.mst-step.active .mst-step-label {
  color: var(--accent);
}
.mst-step.done .mst-step-label {
  color: var(--ok, #7ad79a);
}

/* Connector line between steps */
.mst-step-line {
  flex: 1;
  height: 2px;
  background: rgba(245, 241, 232, 0.12);
  margin-bottom: 16px;
  border-radius: 1px;
  position: relative;
  overflow: hidden;
}
.mst-step-line-fill {
  position: absolute;
  inset: 0;
  background: var(--ok, #7ad79a);
  transform: scaleX(0);
  transform-origin: left;
  border-radius: 1px;
  transition: transform 0.4s ease;
}
.mst-step-line.done .mst-step-line-fill {
  transform: scaleX(1);
}

/* ── Step panels ── */
.mst-body {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(245, 241, 232, 0.1) transparent;
  position: relative;
}
.mst-body::-webkit-scrollbar { width: 3px; }
.mst-body::-webkit-scrollbar-thumb { background: rgba(245, 241, 232, 0.1); border-radius: 2px; }

.mst-panel {
  display: none;
  padding: 4px 20px 16px;
  animation: mstPanelIn 0.28s ease;
}
.mst-panel.active {
  display: block;
}
@keyframes mstPanelIn {
  from { opacity: 0; transform: translateX(18px); }
  to   { opacity: 1; transform: translateX(0); }
}
.mst-panel.back-anim {
  animation: mstPanelBack 0.28s ease;
}
@keyframes mstPanelBack {
  from { opacity: 0; transform: translateX(-18px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── Step 1: Chọn căn ── */
.mst-section-title {
  font-size: 18px;
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--fg);
  margin-bottom: 14px;
  letter-spacing: 0.01em;
}
.mst-unit-filters {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.mst-filter-btn {
  height: 28px;
  padding: 0 11px;
  border-radius: 14px;
  border: 1px solid rgba(245, 241, 232, 0.18);
  background: transparent;
  color: rgba(245, 241, 232, 0.55);
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.16s;
  white-space: nowrap;
}
.mst-filter-btn.active,
.mst-filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(232, 192, 137, 0.1);
}

/* Unit cards list */
.mst-unit-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 4px;
}
.mst-unit-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1.5px solid rgba(245, 241, 232, 0.1);
  background: rgba(245, 241, 232, 0.03);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}
.mst-unit-card:hover {
  border-color: rgba(232, 192, 137, 0.45);
  background: rgba(232, 192, 137, 0.06);
}
.mst-unit-card.selected {
  border-color: var(--accent);
  background: rgba(232, 192, 137, 0.1);
}
.mst-unit-card.sold {
  opacity: 0.38;
  pointer-events: none;
}
.mst-unit-card-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid rgba(245, 241, 232, 0.2);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  transition: all 0.2s;
}
.mst-unit-card.selected .mst-unit-card-check {
  background: var(--accent);
  border-color: var(--accent);
}
.mst-unit-card-check svg {
  opacity: 0;
  transition: opacity 0.2s;
}
.mst-unit-card.selected .mst-unit-card-check svg {
  opacity: 1;
}
.mst-unit-card-body {
  flex: 1;
  min-width: 0;
}
.mst-unit-card-code {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 2px;
}
.mst-unit-card-meta {
  font-size: 11px;
  color: rgba(245, 241, 232, 0.55);
  line-height: 1.4;
}
.mst-unit-card-price {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  color: var(--accent);
  flex-shrink: 0;
  white-space: nowrap;
}
.mst-unit-badge {
  position: absolute;
  top: 8px;
  right: 10px;
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 2px 7px;
  border-radius: 8px;
}
.mst-unit-badge.available { background: rgba(122, 215, 154, 0.15); color: var(--ok); }
.mst-unit-badge.holding   { background: rgba(232, 192, 137, 0.15); color: var(--accent); }
.mst-unit-badge.sold      { background: rgba(255, 107, 107, 0.12); color: #ff6b6b; }

/* Skip / no preference link */
.mst-skip-link {
  display: block;
  text-align: center;
  font-size: 11.5px;
  color: rgba(245, 241, 232, 0.4);
  padding: 10px 0 4px;
  cursor: pointer;
  transition: color 0.16s;
}
.mst-skip-link:hover { color: rgba(245, 241, 232, 0.7); }

/* ── Step 2: Form ── */
.mst-form-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.mst-selected-preview {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid rgba(232, 192, 137, 0.35);
  background: rgba(232, 192, 137, 0.07);
  margin-bottom: 6px;
}
.mst-preview-code {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}
.mst-preview-meta {
  font-size: 11px;
  color: rgba(245, 241, 232, 0.55);
}
.mst-preview-price {
  margin-left: auto;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  color: var(--accent);
  flex-shrink: 0;
}
.mst-no-unit-preview {
  font-size: 12px;
  color: rgba(245, 241, 232, 0.4);
  font-style: italic;
}

/* Form fields */
.mst-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.mst-field label {
  font-size: 9.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(245, 241, 232, 0.45);
  font-family: var(--font-sans);
}
.mst-field label .req {
  color: #ff6b6b;
  margin-left: 2px;
}
.mst-field label .opt {
  color: rgba(245, 241, 232, 0.28);
  font-size: 9px;
  text-transform: none;
  letter-spacing: 0;
  margin-left: 4px;
}
.mst-input {
  width: 100%;
  padding: 12px 14px;
  background: rgba(245, 241, 232, 0.05);
  border: 1px solid rgba(245, 241, 232, 0.14);
  border-radius: 10px;
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
}
.mst-input:focus {
  border-color: var(--accent);
  background: rgba(232, 192, 137, 0.05);
}
.mst-input::placeholder { color: rgba(245, 241, 232, 0.28); }
.mst-input option { background: #12161e; }

.mst-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* Choice button groups */
.mst-choice-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.mst-choice-btn {
  height: 32px;
  padding: 0 14px;
  border-radius: 16px;
  border: 1px solid rgba(245, 241, 232, 0.18);
  background: transparent;
  color: rgba(245, 241, 232, 0.55);
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.16s;
  white-space: nowrap;
}
.mst-choice-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.mst-choice-btn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #0a0d12;
}

/* Consent checkboxes */
.mst-consent-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.mst-consent-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  flex-shrink: 0;
  cursor: pointer;
}
.mst-consent-label {
  font-size: 12px;
  color: rgba(245, 241, 232, 0.55);
  cursor: pointer;
}

/* Validation error */
.mst-error {
  padding: 9px 13px;
  background: rgba(255, 107, 107, 0.1);
  border: 1px solid rgba(255, 107, 107, 0.3);
  border-radius: 8px;
  color: #ff6b6b;
  font-size: 12px;
}

/* ── Step 3: Xác nhận ── */
.mst-confirm-card {
  background: rgba(245, 241, 232, 0.03);
  border: 1px solid rgba(245, 241, 232, 0.1);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 14px;
}
.mst-confirm-section {
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(245, 241, 232, 0.08);
}
.mst-confirm-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}
.mst-confirm-label {
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(245, 241, 232, 0.35);
  margin-bottom: 8px;
}
.mst-confirm-unit-code {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 3px;
}
.mst-confirm-unit-meta {
  font-size: 12px;
  color: rgba(245, 241, 232, 0.55);
}
.mst-confirm-unit-price {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  color: var(--accent);
  margin-top: 4px;
}
.mst-confirm-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 5px;
}
.mst-confirm-row-label {
  font-size: 11px;
  color: rgba(245, 241, 232, 0.45);
}
.mst-confirm-row-val {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--fg);
  text-align: right;
  max-width: 60%;
  word-break: break-word;
}

/* Consent summary in confirm */
.mst-consent-tags {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.mst-ctag {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 8px;
  background: rgba(232, 192, 137, 0.12);
  border: 1px solid rgba(232, 192, 137, 0.3);
  color: var(--accent);
}

/* ── Success screen ── */
#mob-stepper-success {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px 24px 40px;
  gap: 12px;
}
#mob-stepper-success.show {
  display: flex;
}
.mst-success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 2px solid var(--ok, #7ad79a);
  background: rgba(122, 215, 154, 0.1);
  display: grid;
  place-items: center;
  color: var(--ok, #7ad79a);
  margin-bottom: 6px;
  animation: mstSuccessPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) 0.1s both;
}
@keyframes mstSuccessPop {
  from { transform: scale(0.6); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}
.mst-success-title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  color: var(--fg);
}
.mst-success-sub {
  font-size: 13px;
  color: rgba(245, 241, 232, 0.6);
  line-height: 1.6;
  max-width: 280px;
}
.mst-success-zalo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 20px;
  border-radius: 10px;
  background: #0068ff;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-sans);
  text-decoration: none;
  margin-top: 6px;
  transition: background 0.18s;
}
.mst-success-zalo:hover { background: #005ae0; }
.mst-success-reset {
  font-size: 12px;
  color: rgba(245, 241, 232, 0.4);
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
  font-family: var(--font-sans);
}
.mst-success-reset:hover { color: rgba(245, 241, 232, 0.7); }

/* ── Footer nav (Back / Next / Submit) ── */
.mst-footer {
  padding: 14px 20px 24px;
  flex-shrink: 0;
  background: #0d1118;
  border-top: 1px solid rgba(245, 241, 232, 0.07);
  display: flex;
  gap: 10px;
  align-items: center;
}
.mst-btn-back {
  height: 46px;
  padding: 0 18px;
  border-radius: 12px;
  border: 1px solid rgba(245, 241, 232, 0.18);
  background: transparent;
  color: rgba(245, 241, 232, 0.6);
  font-size: 13px;
  font-family: var(--font-sans);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.18s;
  white-space: nowrap;
}
.mst-btn-back:hover {
  border-color: rgba(245, 241, 232, 0.35);
  color: var(--fg);
}
.mst-btn-next {
  flex: 1;
  height: 46px;
  border-radius: 12px;
  border: none;
  background: var(--accent);
  color: #0a0d12;
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-sans);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  letter-spacing: 0.02em;
  transition: background 0.18s, transform 0.14s;
}
.mst-btn-next:hover { background: #f3d29c; }
.mst-btn-next:active { transform: scale(0.98); }
.mst-btn-next:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}
.mst-btn-next.loading {
  opacity: 0.7;
  pointer-events: none;
}

/* Hide stepper on desktop */
@media (min-width: 769px) {
  #mob-stepper-backdrop { display: none !important; }
}