/* ============================================================================
   HORIZON·9 — Registration Page Styles
   ============================================================================ */

/* Layout: side-by-side (visual | form) */
.page-register {
  background: var(--bg-1);
}

/* ====== HEADER ====== */
.reg-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 0 32px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.reg-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  max-width: 1600px;
  margin: 0 auto;
}

.reg-back {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-light);
  transition: color var(--transition-fast);
}
.reg-back:hover { color: var(--text); }
.reg-back svg { flex-shrink: 0; }

.reg-logo-text {
  font-family: var(--font);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: 2px;
}
.reg-logo-text .dot { color: var(--gold); }

.reg-header-date {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-light);
  letter-spacing: 0.12em;
}

/* ====== MAIN LAYOUT ====== */
.reg-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
}

/* ====== LEFT VISUAL PANEL ====== */
.reg-visual {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.reg-visual-bg {
  position: absolute;
  inset: 0;
}

.reg-visual-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.reg-visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(8, 13, 58, 0.3) 0%,
    rgba(8, 13, 58, 0.55) 50%,
    rgba(8, 13, 58, 0.85) 100%
  );
}

.reg-visual-content {
  position: relative;
  z-index: 2;
  padding: 64px 48px;
  width: 100%;
}

.reg-visual-title {
  font-family: var(--font);
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 16px;
}

.reg-visual-sub {
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
  margin-bottom: 32px;
}

.reg-visual-stats {
  display: flex;
  gap: 32px;
}

.rvs { text-align: center; }

.rvs-n {
  display: block;
  font-family: var(--font);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--white);
}

.rvs-l {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  color: rgba(255,255,255,0.45);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 4px;
}

/* ====== RIGHT FORM SECTION ====== */
.reg-form-section {
  padding: 100px 48px 80px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.reg-form-wrap {
  max-width: 580px;
  width: 100%;
}

/* ====== STEP INDICATOR ====== */
.step-indicator {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 48px;
}

.step-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-light);
  background: var(--bg-2);
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.step-dot.active {
  background: var(--blue);
  color: var(--white);
}

.step-dot.done {
  background: var(--navy);
  color: var(--white);
}

.step-line {
  flex: 1;
  height: 2px;
  background: #e0e0e0;
  margin: 0 8px;
  transition: background var(--transition-fast);
}

.step-line.done {
  background: var(--navy);
}

/* ====== FORM STEPS ====== */
.form-step {
  display: none;
  animation: fadeInUp 0.4s ease both;
}

.form-step.active { display: block; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.step-header { margin-bottom: 32px; }

.step-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 8px;
}

.step-title {
  font-family: var(--font);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ====== FIELDS ====== */
.field {
  margin-bottom: 20px;
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.req { color: var(--blue); }

.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field textarea,
.field select {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg-2);
  border: 2px solid transparent;
  border-radius: 10px;
  outline: none;
  transition: var(--transition-fast);
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--blue);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(53, 52, 248, 0.08);
}

.field input::placeholder,
.field textarea::placeholder {
  color: #b0b0b0;
}

.field textarea {
  resize: vertical;
  min-height: 80px;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field-conditional {
  display: none;
}

.field-conditional.show {
  display: block;
  animation: fadeInUp 0.3s ease both;
}

/* Field validation */
.field.error input,
.field.error textarea {
  border-color: #e74c3c;
  background: rgba(231, 76, 60, 0.04);
}

.field .error-msg {
  font-size: 0.78rem;
  color: #e74c3c;
  margin-top: 4px;
  display: none;
}

.field.error .error-msg { display: block; }

/* ====== RADIO CARDS ====== */
.radio-cards {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.radio-cards--row {
  flex-direction: row;
}

.radio-card {
  cursor: pointer;
  flex: 1;
}

.radio-card input { display: none; }

.rc-inner {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  background: var(--bg-2);
  border: 2px solid transparent;
  border-radius: 12px;
  transition: var(--transition-fast);
}

.radio-card input:checked + .rc-inner {
  border-color: var(--blue);
  background: rgba(53, 52, 248, 0.03);
  box-shadow: 0 0 0 4px rgba(53, 52, 248, 0.06);
}

.rc-inner:hover {
  border-color: rgba(53, 52, 248, 0.2);
}

.rc-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.rc-text strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.rc-text span {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.5;
}

.radio-card--sm .rc-inner {
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px 14px;
}

.radio-card--sm .rc-icon {
  font-size: 1.4rem;
  margin-top: 0;
}

/* Color accents on room cards */
.rc-inner--color-info { border-left: 3px solid var(--blue); }
.rc-inner--color-science { border-left: 3px solid #27ae60; }
.rc-inner--color-arts { border-left: 3px solid #8e44ad; }

.radio-card--sm .rc-inner--color-info,
.radio-card--sm .rc-inner--color-science,
.radio-card--sm .rc-inner--color-arts {
  border-left: none;
  border-top: 3px solid;
}
.radio-card--sm .rc-inner--color-info { border-top-color: var(--blue); }
.radio-card--sm .rc-inner--color-science { border-top-color: #27ae60; }
.radio-card--sm .rc-inner--color-arts { border-top-color: #8e44ad; }

/* ====== ACTIVITY MULTI-SELECT CARDS ====== */
.field-hint {
  font-size: 0.82rem;
  color: var(--text-light);
  line-height: 1.5;
  margin-bottom: 16px;
}

.activity-conflict-msg {
  display: none;
  font-size: 0.8rem;
  font-weight: 500;
  color: #e67e22;
  background: rgba(230, 126, 34, 0.08);
  border: 1px solid rgba(230, 126, 34, 0.2);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 16px;
}
.activity-conflict-msg.show { display: block; }

.activity-slot-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-light);
  margin: 20px 0 8px;
  padding-left: 2px;
}
.activity-slot-label:first-of-type { margin-top: 0; }

.activity-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 8px;
}

.activity-card {
  cursor: pointer;
  position: relative;
}

.activity-card input[type="checkbox"] {
  display: none;
}

.ac-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-2);
  border: 2px solid transparent;
  border-radius: 12px;
  transition: all 0.2s ease;
  position: relative;
  min-height: 64px;
}

.ac-inner:hover {
  border-color: rgba(53, 52, 248, 0.15);
}

/* Room color accents */
.ac-inner--info { border-left: 3px solid var(--blue); }
.ac-inner--science { border-left: 3px solid #22c55e; }
.ac-inner--arts { border-left: 3px solid #a855f7; }

/* Check indicator */
.ac-check {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 2px solid #d0d0d0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s ease;
  background: var(--white);
}
.ac-check svg {
  opacity: 0;
  transform: scale(0.5);
  transition: all 0.15s ease;
  stroke: var(--white);
}

.ac-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
}

.ac-text {
  flex: 1;
  min-width: 0;
}

.ac-text strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ac-meta {
  font-size: 0.72rem;
  color: var(--text-light);
  margin-top: 2px;
  display: block;
}

/* ====== Selected state ====== */
.activity-card.selected .ac-inner {
  border-color: var(--blue);
  background: rgba(53, 52, 248, 0.04);
  box-shadow: 0 0 0 4px rgba(53, 52, 248, 0.06);
}

.activity-card.selected .ac-check {
  background: var(--blue);
  border-color: var(--blue);
}

.activity-card.selected .ac-check svg {
  opacity: 1;
  transform: scale(1);
}

/* ====== Disabled / conflict state ====== */
.activity-card.disabled {
  pointer-events: auto;
  cursor: not-allowed;
}

.activity-card.disabled .ac-inner {
  opacity: 0.4;
  background: rgba(0, 0, 0, 0.02);
  border-color: transparent;
}

.activity-card.disabled .ac-inner::after {
  content: "⚠️";
  position: absolute;
  top: 6px;
  right: 8px;
  font-size: 0.7rem;
}

.activity-card.disabled:hover .ac-inner {
  border-color: rgba(231, 76, 60, 0.3);
}

/* ====== Full / sold-out state ====== */
.activity-card.full {
  pointer-events: none;
  cursor: default;
}

.activity-card.full .ac-inner {
  opacity: 0.45;
  background: rgba(0, 0, 0, 0.02);
  border-color: transparent;
  filter: grayscale(0.5);
}

.activity-card.full .ac-check {
  border-color: #ccc;
  background: #eee;
}

.ac-badge-full {
  display: inline-block;
  margin-top: 4px;
  padding: 2px 8px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #fff;
  background: #e74c3c;
  border-radius: 4px;
  line-height: 1.4;
}

/* ====== Remaining spots badge ====== */
.ac-remaining {
  display: inline-block;
  margin-top: 4px;
  font-size: 0.65rem;
  font-weight: 600;
  color: #e67e22;
  letter-spacing: 0.02em;
}

.ac-remaining--last {
  color: #e74c3c;
  font-weight: 700;
}

/* ====== Sur-place hint ====== */
.field-hint--surplace {
  background: rgba(53, 52, 248, 0.04);
  border: 1px solid rgba(53, 52, 248, 0.12);
  border-radius: 8px;
  padding: 10px 14px;
  margin-top: 4px;
  color: var(--text-light);
}

/* Error state on the field container */
#fieldActivities.error .activity-cards {
  outline: 2px solid #e74c3c;
  outline-offset: 4px;
  border-radius: 12px;
}

/* ====== STEP ACTIONS ====== */
.step-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid rgba(0,0,0,0.06);
}

.btn-next, .btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-light);
  background: transparent;
  border: 1px solid rgba(0,0,0,0.1);
  border-radius: var(--btn-radius);
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-back:hover {
  border-color: var(--text);
  color: var(--text);
}

/* ====== CHECKBOX ====== */
.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
}

.checkbox-label input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid #d0d0d0;
  border-radius: 5px;
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
}

.checkbox-label input[type="checkbox"]:checked {
  background: var(--blue);
  border-color: var(--blue);
}

.checkbox-label input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
}

/* ====== SUMMARY CARD ====== */
.summary-card {
  background: var(--bg-2);
  border-radius: 14px;
  padding: 28px;
  margin-bottom: 24px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 10px 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.summary-row:last-child { border-bottom: none; }

.summary-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.summary-value {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  text-align: right;
}

/* ====== SUCCESS STATE ====== */
.form-success {
  display: none;
  text-align: center;
  animation: fadeInUp 0.5s ease both;
}

.form-success.show { display: block; }

.success-icon {
  margin-bottom: 24px;
  color: #27ae60;
}

.success-icon svg {
  stroke: #27ae60;
}

.success-details {
  background: var(--bg-2);
  border-radius: 14px;
  padding: 24px;
  margin: 32px 0;
  text-align: left;
}

.success-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* ====== CLOSED REGISTRATION STATE ====== */
.reg-closed {
  text-align: center;
  animation: fadeInUp 0.5s ease both;
}

.reg-closed-icon {
  margin-bottom: 20px;
  color: var(--gold);
}

.reg-closed-icon svg {
  stroke: var(--gold);
}

.reg-closed-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 12px;
}

.reg-closed-desc {
  font-size: 1.05rem;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 440px;
  margin: 0 auto 32px;
}

.reg-closed-surplace {
  background: linear-gradient(135deg, rgba(53,52,248,0.06), rgba(201,162,39,0.08));
  border: 2px solid var(--gold);
  border-radius: 16px;
  padding: 28px 24px;
  margin-bottom: 28px;
  text-align: center;
}

.reg-closed-surplace-icon {
  font-size: 2.4rem;
  margin-bottom: 8px;
}

.reg-closed-surplace h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.reg-closed-surplace p {
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.7;
  margin: 0;
}

.reg-closed-details {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.reg-closed-detail {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-2);
  border-radius: 12px;
  padding: 14px 20px;
  text-align: left;
}

.reg-closed-detail-icon {
  font-size: 1.5rem;
}

.reg-closed-detail div {
  display: flex;
  flex-direction: column;
}

.reg-closed-detail strong {
  font-size: 0.95rem;
  color: var(--navy);
}

.reg-closed-detail span {
  font-size: 0.82rem;
  color: var(--text-3);
}

.reg-closed-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 8px;
}

/* ====== RESPONSIVE ====== */
@media (max-width: 1024px) {
  .reg-main {
    grid-template-columns: 1fr;
  }

  .reg-visual {
    position: relative;
    height: 50vh;
    min-height: 350px;
  }

  .reg-visual-content {
    padding: 40px 32px;
  }

  .reg-visual-title {
    font-size: 2rem;
  }

  .reg-form-section {
    padding: 48px 32px 64px;
  }
}

@media (max-width: 768px) {
  .reg-header { padding: 0 16px; }

  .reg-visual {
    height: 40vh;
    min-height: 280px;
  }

  .reg-visual-content { padding: 32px 20px; }
  .reg-visual-title { font-size: 1.8rem; }
  .reg-visual-stats { gap: 20px; }
  .rvs-n { font-size: 1.4rem; }

  .reg-form-section { padding: 32px 20px 56px; }

  .field-grid { grid-template-columns: 1fr; gap: 0; }

  .radio-cards--row { flex-direction: column; }

  .activity-cards { grid-template-columns: 1fr; }

  .step-actions {
    flex-direction: column-reverse;
    gap: 12px;
  }
  .step-actions .btn-back,
  .step-actions .btn-next,
  .step-actions .btn-submit {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .reg-header-date { display: none; }
  .reg-visual-stats { flex-wrap: wrap; gap: 16px; }
}