/* ============================================================
   Course Enrollment Modal — modal.css
   Design: Clean, refined, edu-platform aesthetic
   ============================================================ */

/* ── Tokens ── */
:root {
  --ces-primary:       #2563eb;
  --ces-primary-dark:  #1d4ed8;
  --ces-primary-light: #eff6ff;
  --ces-accent:        #f59e0b;
  --ces-accent-dark:   #d97706;
  --ces-success:       #10b981;
  --ces-danger:        #ef4444;
  --ces-text:          #111827;
  --ces-text-muted:    #6b7280;
  --ces-border:        #e5e7eb;
  --ces-bg:            #ffffff;
  --ces-overlay-bg:    rgba(15, 23, 42, 0.65);
  --ces-radius:        14px;
  --ces-radius-sm:     8px;
  --ces-shadow:        0 25px 60px rgba(0,0,0,.22), 0 8px 24px rgba(0,0,0,.12);
  --ces-transition:    0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --ces-font:          'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* ── Overlay ── */
.ces-modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--ces-overlay-bg);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: cesOverlayIn var(--ces-transition) both;
}
.ces-modal-overlay[hidden] { display: none !important; }

@keyframes cesOverlayIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── Container ── */
.ces-modal-container {
  background: var(--ces-bg);
  border-radius: var(--ces-radius);
  box-shadow: var(--ces-shadow);
  width: 100%;
  max-width: 520px;
  max-height: 92vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  font-family: var(--ces-font);
  animation: cesModalIn var(--ces-transition) both;
  position: relative;
}

@keyframes cesModalIn {
  from { opacity: 0; transform: translateY(20px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Close Button ── */
.ces-modal-close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: #f3f4f6;
  border: none;
  border-radius: 50%;
  width: 34px;
  height: 34px;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  color: var(--ces-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--ces-transition), color var(--ces-transition);
  z-index: 2;
}
.ces-modal-close:hover { background: #fee2e2; color: var(--ces-danger); }

/* ── Header ── */
.ces-modal-header {
  background: linear-gradient(135deg, var(--ces-primary) 0%, #1e40af 100%);
  padding: 24px 24px 20px;
  color: #fff;
  flex-shrink: 0;
}
.ces-modal-logo { margin-bottom: 10px; }
.ces-logo-img   { height: 36px; object-fit: contain; }
.ces-site-name  { font-weight: 700; font-size: 15px; opacity: .85; }
.ces-modal-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 16px;
  color: #fff;
}

/* ── Progress ── */
.ces-progress-wrap { margin-top: 4px; }
.ces-progress-track {
  height: 4px;
  background: rgba(255,255,255,.25);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 10px;
}
.ces-progress-fill {
  height: 100%;
  background: #fff;
  border-radius: 99px;
  transition: width 0.4s cubic-bezier(.4,0,.2,1);
  width: 14.28%;
}
.ces-progress-steps {
  display: flex;
  gap: 4px;
}
.ces-progress-step {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255,255,255,.25);
  color: rgba(255,255,255,.7);
  font-size: 11px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--ces-transition), color var(--ces-transition);
  flex-shrink: 0;
}
.ces-progress-step.active {
  background: #fff;
  color: var(--ces-primary);
}
.ces-progress-step.done {
  background: rgba(255,255,255,.55);
  color: #fff;
}

/* ── Body / Scroll Area ── */
.ces-modal-body {
  overflow-y: auto;
  padding: 0;
  flex: 1;
}

/* ── Steps ── */
.ces-step {
  padding: 28px 28px 24px;
  animation: cesStepIn 0.3s cubic-bezier(.4,0,.2,1) both;
}
.ces-step[hidden] { display: none !important; }

@keyframes cesStepIn {
  from { opacity: 0; transform: translateX(18px); }
  to   { opacity: 1; transform: translateX(0); }
}

.ces-step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--ces-text);
  margin: 0 0 4px;
}
.ces-step-sub {
  font-size: 13px;
  color: var(--ces-text-muted);
  margin: 0 0 20px;
}

/* ── Form Fields ── */
.ces-field-group {
  margin-bottom: 18px;
}
.ces-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ces-text);
  margin-bottom: 6px;
}
.ces-label .req { color: var(--ces-danger); margin-left: 2px; }

.ces-input,
.ces-select {
  width: 100%;
  box-sizing: border-box;
  border: 1.5px solid var(--ces-border);
  border-radius: var(--ces-radius-sm);
  padding: 11px 14px;
  font-size: 15px;
  color: var(--ces-text);
  background: #fff;
  transition: border-color var(--ces-transition), box-shadow var(--ces-transition);
  appearance: none;
  -webkit-appearance: none;
  outline: none;
  font-family: var(--ces-font);
}
.ces-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}
.ces-input:focus,
.ces-select:focus {
  border-color: var(--ces-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.ces-input.error,
.ces-select.error {
  border-color: var(--ces-danger);
}

.ces-error {
  display: block;
  font-size: 12px;
  color: var(--ces-danger);
  margin-top: 4px;
  min-height: 16px;
}

/* ── Radio Cards ── */
.ces-radio-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ces-radio-option {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1.5px solid var(--ces-border);
  border-radius: var(--ces-radius-sm);
  padding: 13px 16px;
  cursor: pointer;
  transition: border-color var(--ces-transition), background var(--ces-transition);
  font-size: 15px;
  color: var(--ces-text);
  user-select: none;
}
.ces-radio-option:hover { border-color: var(--ces-primary); background: var(--ces-primary-light); }
.ces-radio-option input[type="radio"] { accent-color: var(--ces-primary); width: 17px; height: 17px; flex-shrink: 0; }
.ces-radio-option.selected { border-color: var(--ces-primary); background: var(--ces-primary-light); }

/* Icon cards (Format / Class Type) */
.ces-icon-cards { flex-direction: row; flex-wrap: wrap; }
.ces-icon-cards .ces-radio-option {
  flex: 1 1 calc(50% - 5px);
  flex-direction: column;
  align-items: flex-start;
  padding: 16px;
  gap: 6px;
}
.ces-radio-icon { font-size: 26px; }

/* ── Duration Cards ── */
.ces-duration-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
}
.ces-duration-card {
  border: 1.5px solid var(--ces-border);
  border-radius: var(--ces-radius-sm);
  padding: 16px 14px;
  cursor: pointer;
  transition: border-color var(--ces-transition), box-shadow var(--ces-transition), background var(--ces-transition);
  text-align: center;
  user-select: none;
  position: relative;
}
.ces-duration-card:hover {
  border-color: var(--ces-primary);
  background: var(--ces-primary-light);
}
.ces-duration-card.selected {
  border-color: var(--ces-primary);
  background: var(--ces-primary-light);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.ces-duration-card .card-label  { font-weight: 700; font-size: 15px; color: var(--ces-text); }
.ces-duration-card .card-desc   { font-size: 11px; color: var(--ces-text-muted); margin-top: 4px; }
.ces-duration-badge {
  position: absolute;
  top: -9px;
  right: 10px;
  background: var(--ces-accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

/* ── Pricing Actions ── */
.ces-pricing-actions {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.ces-badge-early {
  font-size: 12px;
  font-weight: 700;
  color: var(--ces-accent-dark);
  margin-bottom: 6px;
}
.ces-btn-price {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  border: none;
  border-radius: var(--ces-radius-sm);
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .18s, box-shadow .18s, filter .18s;
  font-family: var(--ces-font);
}
.ces-btn-price:hover   { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0,0,0,.15); }
.ces-btn-price:active  { transform: translateY(0); }

.ces-btn-eb {
  background: linear-gradient(135deg, var(--ces-accent) 0%, var(--ces-accent-dark) 100%);
  color: #fff;
}
.ces-btn-normal {
  background: linear-gradient(135deg, var(--ces-primary) 0%, var(--ces-primary-dark) 100%);
  color: #fff;
}
.ces-btn-price .btn-price {
  font-size: 18px;
  font-weight: 800;
}
.ces-expiry-note {
  font-size: 11px;
  color: var(--ces-text-muted);
  margin: -6px 0 0;
}

/* ── Navigation Buttons ── */
.ces-btn-next,
.ces-btn-back {
  font-family: var(--ces-font);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--ces-radius-sm);
  cursor: pointer;
  transition: background var(--ces-transition), transform .15s;
  border: none;
}
.ces-btn-next {
  background: var(--ces-primary);
  color: #fff;
  width: 100%;
  margin-top: 4px;
}
.ces-btn-next:hover { background: var(--ces-primary-dark); }

.ces-step-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}
.ces-step-nav .ces-btn-next { width: auto; flex: 1; }
.ces-btn-back {
  background: #f3f4f6;
  color: var(--ces-text-muted);
  flex-shrink: 0;
}
.ces-btn-back:hover { background: var(--ces-border); color: var(--ces-text); }

/* ── Processing Step ── */
.ces-step-processing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 28px;
  text-align: center;
}
.ces-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--ces-border);
  border-top-color: var(--ces-primary);
  border-radius: 50%;
  animation: cesSpin .8s linear infinite;
  margin-bottom: 20px;
}
@keyframes cesSpin { to { transform: rotate(360deg); } }

/* ── Enroll Button (on listing/single page) ── */
.ces-enroll-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--ces-primary);
  color: #fff;
  border: none;
  border-radius: var(--ces-radius-sm);
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--ces-transition), transform .15s, box-shadow .15s;
  font-family: var(--ces-font);
}
.ces-enroll-btn:hover {
  background: var(--ces-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37,99,235,.3);
}

/* ── Responsive ── */
@media (max-width: 540px) {
  .ces-modal-container { max-height: 100vh; border-radius: 0; }
  .ces-modal-overlay   { padding: 0; align-items: flex-end; }
  .ces-step            { padding: 20px 18px 18px; }
  .ces-modal-header    { padding: 18px 18px 16px; }
  .ces-icon-cards .ces-radio-option { flex: 1 1 100%; }
}