/* ═══════════════════════════════════════════════════════════════════════════
   PHYSICSFORUM.ORG — PRO / PREMIUM STYLES
   Mobile-first. CSS custom properties only.
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Pro Hero ── */
.pro-hero {
  background: linear-gradient(135deg, #4C1D95 0%, #1E3A8A 50%, #0A1628 100%);
  padding: var(--space-16) var(--space-4) var(--space-12);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.pro-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(124,58,237,0.3) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 80%, rgba(37,99,235,0.2) 0%, transparent 50%);
  pointer-events: none;
}

.pro-hero-inner {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.pro-hero-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-6);
  opacity: 0.9;
  animation: heroPulse 3s ease-in-out infinite;
}

@keyframes heroPulse {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.08); opacity: 1; }
}

.pro-hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 900;
  color: var(--text-inverse);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  line-height: 1.15;
}

@media (min-width: 640px) {
  .pro-hero h1 { font-size: var(--text-5xl); }
}

.pro-hero h1 .gold-accent {
  background: linear-gradient(135deg, #F59E0B 0%, #FDE68A 50%, #F59E0B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pro-hero p {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-neutron-grey);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.pro-hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.pro-hero-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-neutron-grey);
}

.pro-hero-badge svg {
  color: var(--color-quantum-gold);
}

/* ── Pricing Section ── */
.pricing-section {
  background: var(--color-photon-white);
  padding: var(--space-16) var(--space-4) var(--space-12);
}

.pricing-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-space-navy);
  text-align: center;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.pricing-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-neutron-grey);
  text-align: center;
  margin-bottom: var(--space-10);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: 1080px;
  margin: 0 auto;
  align-items: start;
}

@media (min-width: 768px) {
  .pricing-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  background: var(--color-photon-white);
  border: 2px solid var(--color-ice-blue);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  position: relative;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.pricing-card.featured {
  border-color: var(--color-quantum-gold);
  box-shadow: var(--shadow-gold);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-4px);
}

.pricing-card-ribbon {
  position: absolute;
  top: 16px;
  right: -8px;
  background: linear-gradient(135deg, var(--color-quantum-gold), var(--color-dark-gold));
  color: var(--text-inverse);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-sm) var(--radius-sm) var(--radius-sm) 0;
  box-shadow: 0 2px 8px rgba(245,158,11,0.3);
}

.pricing-card-ribbon::after {
  content: '';
  position: absolute;
  bottom: -8px;
  right: 0;
  border: 4px solid transparent;
  border-top-color: var(--color-dark-gold);
  border-right-color: var(--color-dark-gold);
}

.pricing-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
}

.pricing-card-icon.free {
  background: var(--color-ice-blue);
  color: var(--color-electric);
}

.pricing-card-icon.pro-m {
  background: #EDE9FE;
  color: var(--color-soft-purple);
}

.pricing-card-icon.pro-y {
  background: linear-gradient(135deg, #FEF3C7, #FDE68A);
  color: var(--color-dark-gold);
}

.pricing-card-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-dark-grey);
  margin-bottom: var(--space-2);
}

.pricing-card.featured .pricing-card-name {
  color: var(--color-space-navy);
}

.pricing-card-price {
  margin-bottom: var(--space-5);
}

.pricing-card-price .currency {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-dark-grey);
  vertical-align: top;
}

.pricing-card-price .amount {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 900;
  color: var(--color-space-navy);
  letter-spacing: -0.03em;
  line-height: 1;
}

.pricing-card.featured .pricing-card-price .amount {
  color: var(--color-dark-gold);
}

.pricing-card-price .period {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-neutron-grey);
}

.pricing-card-price .annual-note {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-neutron-grey);
  margin-top: var(--space-1);
}

.pricing-card-features {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-6);
  text-align: left;
}

.pricing-card-features li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-dark-grey);
  line-height: 1.4;
}

.pricing-card-features li .check {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--color-fusion-green);
}

.pricing-card-features li .check-pro {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--color-soft-purple);
}

.pricing-card-features li .missing {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--color-neutron-grey);
  opacity: 0.5;
}

.pricing-card-cta {
  width: 100%;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
}

/* ── Feature Comparison Table ── */
.comparison-section {
  background: var(--color-photon-white);
  padding: var(--space-16) var(--space-4);
}

.comparison-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-space-navy);
  text-align: center;
  margin-bottom: var(--space-8);
  letter-spacing: -0.02em;
}

.comparison-table-wrapper {
  max-width: 960px;
  margin: 0 auto;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-ice-blue);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-display);
  min-width: 640px;
}

.comparison-table thead th {
  background: var(--color-space-navy);
  color: #FFFFFF;
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: center;
  padding: var(--space-4) var(--space-4);
  position: sticky;
  top: 0;
  z-index: 1;
}

.comparison-table thead th:first-child {
  text-align: left;
  min-width: 280px;
}

.comparison-table thead th.featured-col {
  background: linear-gradient(135deg, var(--color-dark-gold), var(--color-quantum-gold));
  color: var(--color-space-navy);
}

.comparison-table thead th .plan-name {
  display: block;
  font-size: var(--text-base);
  font-weight: 700;
}

.comparison-table thead th .plan-price {
  display: block;
  font-size: var(--text-xs);
  font-weight: 400;
  margin-top: 2px;
  opacity: 0.8;
}

.comparison-table tbody td {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-ice-blue);
  text-align: center;
  vertical-align: middle;
}

.comparison-table tbody td:first-child {
  text-align: left;
  color: var(--color-dark-grey);
  font-weight: 500;
}

.comparison-table tbody tr:hover {
  background: var(--color-ice-blue);
}

.comparison-table tbody tr:nth-child(even) {
  background: rgba(219,234,254,0.25);
}

.comparison-table tbody tr:nth-child(even):hover {
  background: var(--color-ice-blue);
}

.comparison-table .section-header td {
  background: var(--color-academic-blue) !important;
  color: var(--color-quantum-gold) !important;
  font-weight: 700 !important;
  font-size: var(--text-xs) !important;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-2) var(--space-4) !important;
}

.comparison-table .check-cell {
  color: var(--color-fusion-green);
}

.comparison-table .check-cell svg {
  width: 20px;
  height: 20px;
}

.comparison-table .dash-cell {
  color: var(--color-neutron-grey);
}

.comparison-table .limit-cell {
  font-weight: 600;
  color: var(--color-dark-grey);
}

.comparison-table .pro-check-cell {
  color: var(--color-soft-purple);
}

.comparison-table .pro-check-cell svg {
  width: 20px;
  height: 20px;
}

/* ── Testimonials Section ── */
.testimonials-section {
  background: linear-gradient(180deg, var(--color-space-navy) 0%, var(--color-academic-blue) 100%);
  padding: var(--space-16) var(--space-4);
}

.testimonials-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--text-inverse);
  text-align: center;
  margin-bottom: var(--space-3);
}

.testimonials-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-neutron-grey);
  text-align: center;
  margin-bottom: var(--space-10);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: 960px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  backdrop-filter: blur(10px);
  transition: var(--transition-base);
}

.testimonial-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

.testimonial-stars {
  display: flex;
  gap: 2px;
  margin-bottom: var(--space-4);
  color: var(--color-quantum-gold);
}

.testimonial-stars svg {
  width: 18px;
  height: 18px;
}

.testimonial-quote {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-style: italic;
  color: #E2E8F0;
  line-height: 1.7;
  margin-bottom: var(--space-5);
  min-height: 80px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-academic-blue);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  flex-shrink: 0;
}

.testimonial-author-info {
  min-width: 0;
}

.testimonial-author-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-inverse);
}

.testimonial-author-role {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-neutron-grey);
}

/* ── FAQ Section ── */
.faq-section {
  background: var(--color-photon-white);
  padding: var(--space-16) var(--space-4);
}

.faq-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-space-navy);
  text-align: center;
  margin-bottom: var(--space-8);
  letter-spacing: -0.02em;
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-ice-blue);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  overflow: hidden;
  transition: var(--transition-base);
}

.faq-item:hover {
  border-color: var(--color-electric);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-dark-grey);
  text-align: left;
  transition: var(--transition-fast);
}

.faq-question:hover {
  color: var(--color-electric);
}

.faq-question[aria-expanded="true"] {
  color: var(--color-electric);
}

.faq-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--color-neutron-grey);
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
  color: var(--color-electric);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-answer.open {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 var(--space-6) var(--space-5);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-dark-grey);
  line-height: 1.75;
}

.faq-answer-inner a {
  color: var(--color-electric);
  text-decoration: underline;
}

/* ── Final CTA ── */
.final-cta-section {
  background: linear-gradient(135deg, var(--color-space-navy) 0%, #1E3A8A 50%, #4C1D95 100%);
  padding: var(--space-16) var(--space-4);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(124,58,237,0.2) 0%, transparent 70%);
  pointer-events: none;
}

.final-cta-inner {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.final-cta-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--text-inverse);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.final-cta-section p {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-neutron-grey);
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.final-cta-section .btn {
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-10);
  font-weight: 700;
}

.final-cta-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-5);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-neutron-grey);
}

.final-cta-guarantee svg {
  color: var(--color-fusion-green);
}

/* ═══════════════════════════════════════════════════════════════════════════
   UPGRADE PAGE
   ═══════════════════════════════════════════════════════════════════════════ */

.upgrade-page {
  min-height: 100vh;
  background: var(--color-photon-white);
}

.upgrade-container {
  max-width: 1040px;
  margin: 0 auto;
  padding: var(--space-12) var(--space-4);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .upgrade-container {
    grid-template-columns: 1fr 340px;
    gap: var(--space-8);
  }
}

.upgrade-main h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-space-navy);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.upgrade-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-neutron-grey);
  margin-bottom: var(--space-8);
}

/* Plan Selection */
.plan-selection {
  margin-bottom: var(--space-8);
}

.plan-selection h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-dark-grey);
  margin-bottom: var(--space-4);
}

.plan-options {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .plan-options {
    grid-template-columns: repeat(3, 1fr);
  }
}

.plan-option-card {
  position: relative;
  border: 2px solid var(--color-ice-blue);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  cursor: pointer;
  transition: var(--transition-base);
  background: var(--color-photon-white);
}

.plan-option-card:hover {
  border-color: var(--color-electric);
}

.plan-option-card.selected {
  border-color: var(--color-quantum-gold);
  background: #FFFBEB;
  box-shadow: var(--shadow-gold);
}

.plan-option-card.selected::before {
  content: '';
  position: absolute;
  top: 10px;
  right: 10px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-quantum-gold);
  display: flex;
  align-items: center;
  justify-content: center;
}

.plan-option-card.selected::after {
  content: '';
  position: absolute;
  top: 15px;
  right: 17px;
  width: 6px;
  height: 11px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.plan-option-radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.plan-option-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-dark-grey);
  margin-bottom: var(--space-1);
}

.plan-option-price {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-space-navy);
}

.plan-option-price .period {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-neutron-grey);
}

.plan-option-save {
  display: inline-block;
  background: var(--color-fusion-green);
  color: var(--text-inverse);
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-top: var(--space-1);
}

/* Payment Form */
.payment-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-dark-grey);
  margin-bottom: var(--space-4);
}

.payment-form-card {
  border: 1px solid var(--color-ice-blue);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  background: var(--color-photon-white);
  box-shadow: var(--shadow-sm);
}

.payment-methods {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-ice-blue);
}

.payment-method {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-neutron-grey);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-dark-grey);
  background: transparent;
  cursor: pointer;
  transition: var(--transition-fast);
}

.payment-method.active {
  background: var(--color-electric);
  border-color: var(--color-electric);
  color: var(--text-inverse);
}

.payment-field {
  margin-bottom: var(--space-4);
}

.payment-field label {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-dark-grey);
  margin-bottom: var(--space-1);
}

.payment-field input {
  width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--color-neutron-grey);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-dark-grey);
  background: var(--color-photon-white);
  transition: var(--transition-fast);
}

.payment-field input:focus {
  outline: none;
  border-color: var(--color-electric);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.payment-field input::placeholder {
  color: var(--color-neutron-grey);
}

.payment-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.payment-security {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-5) 0;
  padding: var(--space-3) var(--space-4);
  background: #ECFDF5;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: #065F46;
}

.payment-security svg {
  flex-shrink: 0;
  color: var(--color-fusion-green);
}

.btn-complete-purchase {
  width: 100%;
  padding: var(--space-4);
  font-size: var(--text-base);
  font-weight: 700;
}

/* Order Summary Sidebar */
.order-summary {
  position: sticky;
  top: 100px;
  align-self: start;
}

.order-summary-card {
  border: 1px solid var(--color-ice-blue);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  background: var(--color-photon-white);
  box-shadow: var(--shadow-md);
}

.order-summary-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-dark-grey);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-ice-blue);
}

.order-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-dark-grey);
}

.order-line .price {
  font-weight: 500;
}

.order-line .free {
  color: var(--color-fusion-green);
  font-weight: 600;
}

.order-divider {
  border-top: 1px solid var(--color-ice-blue);
  margin: var(--space-4) 0;
  padding-top: var(--space-3);
}

.order-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-space-navy);
  padding: var(--space-3) 0;
}

.order-total .total-price {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-dark-gold);
}

.order-guarantee {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding: var(--space-3);
  background: var(--color-ice-blue);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-academic-blue);
}

.order-features {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
}

.order-features li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) 0;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-dark-grey);
}

.order-features li svg {
  flex-shrink: 0;
  color: var(--color-fusion-green);
  width: 16px;
  height: 16px;
}

/* ── Confirmation Modal ── */
.confirm-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  align-items: center;
  justify-content: center;
}

.confirm-modal-overlay.open {
  display: flex;
}

.confirm-modal {
  background: var(--color-photon-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 480px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-xl);
  animation: modalSlideUp 0.3s ease;
}

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

.confirm-modal-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-5);
  background: #ECFDF5;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-fusion-green);
  animation: heroPulse 1s ease;
}

.confirm-modal h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-space-navy);
  margin-bottom: var(--space-3);
}

.confirm-modal p {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-dark-grey);
  line-height: 1.65;
  margin-bottom: var(--space-6);
}

.confirm-modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* ── Dark Mode Overrides ── */
[data-theme="dark"] .plan-option-card.selected {
  background: #1A1F2E;
}

[data-theme="dark"] .payment-security {
  background: rgba(16,185,129,0.1);
  color: #6EE7B7;
}

[data-theme="dark"] .payment-form-card,
[data-theme="dark"] .order-summary-card {
  background: var(--color-slate);
}

[data-theme="dark"] .comparison-table tbody tr:nth-child(even) {
  background: rgba(219,234,254,0.04);
}

[data-theme="dark"] .comparison-table tbody tr:nth-child(even):hover {
  background: rgba(37,99,235,0.1);
}

[data-theme="dark"] .confirm-modal {
  background: var(--color-slate);
}