:root {
  --color-primary: #5f60ee;
  --color-primary-rgb: 95, 96, 238;
  --color-primary-light: #8b8cf4;
  --color-primary-soft: #eeeeff;
  --color-primary-dark: #4344c9;

  --color-secondary: #ffc107;
  --color-secondary-rgb: 255, 193, 7;
  --color-secondary-light: #ffd454;
  --color-secondary-soft: #fff6d6;

  --color-black: #1c1c1e;
  --color-black-soft: #3a3a3c;
  --color-black-deep: #0d0d12;

  --color-grey: #6b7280;
  --color-grey-light: #e5e7eb;
  --color-grey-soft: #f4f5f7;

  --color-white: #ffffff;
  --color-white-soft: #fafafa;

  --bs-primary: var(--color-primary);
  --bs-primary-rgb: var(--color-primary-rgb);
  --bs-secondary: var(--color-secondary);
  --bs-secondary-rgb: var(--color-secondary-rgb);
  --bs-body-font-family: "Rubik", sans-serif;
  --bs-body-color: var(--color-black);
  --bs-body-bg: var(--color-white);

  --hero-gradient: linear-gradient(
    135deg,
    var(--color-black-deep) 0%,
    #1a1a2e 35%,
    var(--color-primary-dark) 70%,
    var(--color-primary) 100%
  );
  --shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.12);
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;
}

body {
  font-family: "Rubik", sans-serif;
  color: var(--color-black);
  background-color: var(--color-white);
}

/* Header */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
}

.site-header .navbar {
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-event-title {
  margin-left: auto;
  text-align: right;
  font-size: clamp(1.05rem, 2.2vw, 1.95rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.header-event-title-inner {
  position: relative;
  display: inline-block;
}

.header-event-title-base {
  color: rgba(255, 255, 255, 0.9);
}

.header-event-title-glow {
  position: absolute;
  inset: 0;
  color: var(--color-white);
  text-shadow:
    0 0 10px rgba(var(--color-secondary-rgb), 0.95),
    0 0 22px rgba(var(--color-secondary-rgb), 0.55),
    0 0 36px rgba(var(--color-primary-rgb), 0.25);
  pointer-events: none;
  white-space: nowrap;
  -webkit-mask-image: linear-gradient(
    90deg,
    transparent 0%,
    rgba(0, 0, 0, 0.2) 32%,
    #000 50%,
    rgba(0, 0, 0, 0.2) 68%,
    transparent 100%
  );
  mask-image: linear-gradient(
    90deg,
    transparent 0%,
    rgba(0, 0, 0, 0.2) 32%,
    #000 50%,
    rgba(0, 0, 0, 0.2) 68%,
    transparent 100%
  );
  -webkit-mask-size: 38% 100%;
  mask-size: 38% 100%;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: -40% 0;
  mask-position: -40% 0;
  transform: scale(1);
  animation: headerGlowTravel 3.6s linear infinite;
}

@keyframes headerGlowTravel {
  0% {
    -webkit-mask-position: -40% 0;
    mask-position: -40% 0;
    transform: scale(1);
    transform-origin: 0% 50%;
  }
  25% {
    transform: scale(1.07);
    transform-origin: 25% 50%;
  }
  50% {
    -webkit-mask-position: 31% 0;
    mask-position: 31% 0;
    transform: scale(1.12);
    transform-origin: 50% 50%;
  }
  75% {
    transform: scale(1.07);
    transform-origin: 75% 50%;
  }
  100% {
    -webkit-mask-position: 140% 0;
    mask-position: 140% 0;
    transform: scale(1);
    transform-origin: 100% 50%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .header-event-title-glow {
    animation: none;
    opacity: 0;
  }
}

.site-logo {
  height: 48px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  filter: brightness(1.05);
}

/* Hero */
.hero-section {
  position: relative;
  display: flex;
  align-items: center;
  padding: 130px 0 60px;
  overflow: hidden;
  color: var(--color-white);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--hero-gradient);
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 10% 20%, rgba(var(--color-primary-rgb), 0.35) 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 80%, rgba(var(--color-primary-rgb), 0.35) 0%, transparent 50%);
  pointer-events: none;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.6;
  pointer-events: none;
}

.hero-copy {
  animation: fadeUp 0.7s ease-out both;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.9rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
  text-wrap: balance;
}

.hero-tagline {
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  font-weight: 600;
  color: var(--color-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.35;
}

.hero-lead {
  font-size: calc(1.8rem - 6px);
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 1.25rem;
}

.hero-text {
  font-size: calc(1.8rem - 6px);
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 1.75rem;
}

.hero-meta {
  margin-top: 0.25rem;
}

.hero-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1.1rem 0.65rem 0.65rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.hero-meta-badge:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(var(--color-secondary-rgb), 0.45);
}

.hero-meta-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
  font-size: 1.1rem;
  color: var(--color-black);
  background: var(--color-secondary);
  border-radius: 50%;
  box-shadow: 0 4px 14px rgba(var(--color-secondary-rgb), 0.35);
}

.hero-meta-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
  padding-right: 0.15rem;
}

.hero-meta-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
}

.hero-meta-value {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-white);
  white-space: nowrap;
}

@media (max-width: 767.98px) {
  .hero-lead,
  .hero-text {
    font-size: 16px;
  }

  .hero-meta {
    flex-wrap: nowrap;
    gap: 0.5rem;
  }

  .hero-meta-badge {
    flex: 1 1 0;
    min-width: 0;
    gap: 0.5rem;
    padding: 0.55rem 0.5rem 0.55rem 0.45rem;
  }

  .hero-meta-icon {
    width: 2.15rem;
    height: 2.15rem;
    font-size: 0.95rem;
  }

  .hero-meta-value {
    font-size: 0.8125rem;
    white-space: normal;
  }

  .hero-meta-label {
    font-size: 0.625rem;
  }
}

/* Referral form */
.form-placeholder-card {
  animation: fadeUp 0.7s ease-out 0.15s both;
  background: rgba(255, 255, 255, 0.97);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 1.5rem 1.35rem;
  max-height: min(85vh, 720px);
  overflow-y: auto;
}

.refer-form-section {
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-grey-light);
}

.refer-form-section-student {
  margin-left: -0.35rem;
  margin-right: -0.35rem;
  padding: 1.15rem 1rem 1.35rem;
  background: linear-gradient(135deg, #d6d7f4 0%, #ede3b8 100%);
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
  border-radius: var(--radius-lg);
  border-bottom: 1px solid rgba(var(--color-primary-rgb), 0.2);
}

.refer-form-section-student .refer-form-heading {
  color: var(--color-primary-dark);
}

.refer-form-section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.refer-form-heading {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.refer-form-block-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.refer-form-block-header .refer-form-heading {
  margin-bottom: 0;
  flex: 1;
}

.refer-form-remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  font-size: 0.9rem;
  line-height: 1;
  color: var(--color-grey);
  background: transparent;
  border: 1px solid var(--color-grey-light);
  border-radius: 50%;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.refer-form-remove:hover {
  color: var(--color-black);
  border-color: var(--color-grey);
  background: var(--color-grey-soft);
}

.refer-form-optional {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-grey);
}

.refer-form .form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-black-soft);
  margin-bottom: 0.35rem;
}

.refer-form .form-control {
  font-size: 0.9375rem;
  padding: 0.55rem 0.75rem;
  border-color: var(--color-grey-light);
  border-radius: 0.5rem;
}

.refer-form .form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.2rem rgba(var(--color-primary-rgb), 0.15);
}

.refer-form .form-control::placeholder {
  color: var(--color-grey);
  opacity: 0.85;
}

.refer-form-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 1.25rem;
  margin-top: 0.25rem;
}

.refer-form-limit-msg {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.75rem 0.9rem;
  font-size: 0.875rem;
  line-height: 1.5;
  font-weight: 500;
  color: #7a5a00;
  background: var(--color-secondary-soft);
  border: 1px solid rgba(var(--color-secondary-rgb), 0.55);
  border-radius: 0.5rem;
}

.refer-form-limit-msg.d-none {
  display: none !important;
}

.refer-form-limit-icon {
  flex-shrink: 0;
  margin-top: 0.15rem;
  color: var(--color-secondary);
}

.btn-add-referral {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border: 1px dashed rgba(var(--color-primary-rgb), 0.45);
  border-radius: 0.5rem;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.btn-add-referral:hover {
  color: var(--color-primary-dark);
  background: var(--color-white);
  border-color: var(--color-primary);
}

.btn-submit-referral {
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--color-black);
  background: var(--color-secondary);
  border: none;
  border-radius: 999px;
  box-shadow: 0 6px 20px rgba(var(--color-secondary-rgb), 0.4);
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn-submit-referral:hover {
  color: var(--color-black);
  background: var(--color-secondary-light);
  transform: translateY(-1px);
}

.refer-form-reset {
  align-self: center;
  margin-top: 0.15rem;
  padding: 0;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-grey);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  background: none;
  border: none;
  transition: color 0.2s ease;
}

.refer-form-reset:hover {
  color: var(--color-primary);
}

.referral-block.d-none {
  display: none !important;
}

.refer-form-req {
  margin-left: 0.15rem;
  color: #c0392b;
}

.refer-form .form-control.is-invalid {
  border-color: #c0392b;
  background-image: none;
  padding-right: 0.75rem;
}

.refer-form .form-control.is-invalid:focus {
  box-shadow: 0 0 0 0.2rem rgba(192, 57, 43, 0.15);
}

.refer-form .invalid-feedback {
  font-size: 0.78rem;
  color: #c0392b;
}

.refer-form-slots {
  margin: 0.85rem 0 0;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-primary-dark);
}

.refer-form-slots.is-full {
  color: #c0392b;
}

.refer-form-slots.d-none,
.refer-form-status.d-none,
.refer-form-success.d-none {
  display: none !important;
}

.refer-form-status {
  padding: 0.75rem 0.9rem;
  font-size: 0.875rem;
  line-height: 1.5;
  font-weight: 500;
  color: #8a1f14;
  background: #fdecea;
  border: 1px solid rgba(192, 57, 43, 0.35);
  border-radius: 0.5rem;
}

.btn-submit-referral:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.refer-form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem 0.5rem;
  text-align: center;
  outline: none;
}

.refer-form-success-icon {
  font-size: 2.75rem;
  line-height: 1;
  color: #1e8449;
}

.refer-form-success-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
}

.refer-form-success-text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-black-soft);
}

/* Content sections */
.content-section {
  padding: 50px 0;
}

.content-section-alt {
  background: var(--color-grey-soft);
}

.section-heading {
  margin-bottom: 3rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  font-weight: 700;
  color: var(--color-black);
}

.section-emoji {
  margin-right: 0.35rem;
}

.step-card {
  height: 100%;
  padding: 2rem 1.5rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-grey-light);
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.step-card:hover {
  transform: translateY(-6px);
  border-color: rgba(var(--color-primary-rgb), 0.35);
  box-shadow: 0 16px 40px rgba(var(--color-primary-rgb), 0.12);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 1.25rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-black);
  background: var(--color-secondary);
  border-radius: 0.65rem;
  box-shadow: 0 4px 14px rgba(var(--color-secondary-rgb), 0.35);
}

.step-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.step-text {
  font-size: 0.975rem;
  line-height: 1.65;
  color: var(--color-grey);
}

.event-card {
  padding: 2.25rem 2rem;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-grey-light);
  box-shadow: var(--shadow-soft);
}

.card-section-title {
  font-size: clamp(1.25rem, 2.5vw, 1.65rem);
  margin-bottom: 1.5rem;
  text-align: left;
}

.event-details li {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.85rem 0;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--color-black-soft);
  border-bottom: 1px solid var(--color-grey-light);
}

.event-detail-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
  font-size: 1rem;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: 0.6rem;
}

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

.event-details li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.event-details li:first-child {
  padding-top: 0;
}

.event-label {
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
}

/* CTA card (paired column) */
.cta-card {
  padding: 2.25rem 2rem;
  background: linear-gradient(145deg, var(--color-primary-soft) 0%, var(--color-white) 100%);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(var(--color-primary-rgb), 0.15);
  box-shadow: var(--shadow-soft);
}

.cta-title {
  margin-bottom: 1rem;
}

.cta-text {
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--color-black-soft);
  margin-bottom: 1.75rem;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2rem;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-black);
  background: var(--color-secondary);
  border: none;
  border-radius: 999px;
  box-shadow: 0 8px 28px rgba(var(--color-secondary-rgb), 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-cta:hover,
.btn-cta:focus-visible {
  color: var(--color-black);
  background: var(--color-secondary-light);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(var(--color-secondary-rgb), 0.5);
}

.terms-text {
  margin-top: 1.75rem;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--color-grey);
}

/* Footer */
.site-footer {
  position: relative;
  padding: 2rem 0;
  overflow: hidden;
  color: rgba(255, 255, 255, 0.75);
  background: var(--hero-gradient);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 10% 20%, rgba(var(--color-primary-rgb), 0.35) 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 80%, rgba(var(--color-primary-rgb), 0.35) 0%, transparent 50%);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.6;
  pointer-events: none;
}

.site-footer .container {
  position: relative;
  z-index: 1;
}

.footer-logo {
  height: 36px;
  width: auto;
  opacity: 0.95;
}

.footer-copyright {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 991.98px) {
  .form-placeholder-card {
    max-height: none;
  }
}

@media (max-width: 575.98px) {
  .header-bar {
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .header-event-title {
    width: 100%;
    margin-left: 0;
    text-align: left;
  }

  .header-event-title-inner {
    text-align: left;
  }
}