/* ================================================================
   QUANTUM INNOVATION CHALLENGE 2026 — TEAM REGISTRATION FORM CSS
   Design: Clean professional card matching reference image
   Color: Primary #214076 (RIT Blue) | Accent #ed674e (RIT Orange)
================================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* ── CSS Variables ── */
:root {
  --rit-blue:        #214076;
  --rit-blue-dark:   #172d56;
  --rit-blue-light:  #2e5599;
  --rit-orange:      #ed674e;
  --rit-orange-dark: #d45439;
  --white:           #ffffff;
  --off-white:       #f8fafc;
  --gray-50:         #f4f6f9;
  --gray-100:        #e8edf5;
  --gray-200:        #d1d9e8;
  --gray-400:        #9aabcc;
  --gray-600:        #5a6e92;
  --gray-800:        #2d3d5c;
  --text-primary:    #1a2d4f;
  --text-secondary:  #4a5e82;
  --text-muted:      #7a90b8;
  --border:          #dce4f0;
  --border-focus:    #214076;
  --shadow-sm:       0 2px 8px rgba(33,64,118,0.10);
  --shadow-md:       0 4px 20px rgba(33,64,118,0.14);
  --shadow-lg:       0 8px 40px rgba(33,64,118,0.18);
  --radius-sm:       8px;
  --radius-md:       12px;
  --radius-lg:       16px;
  --font:            'Poppins', sans-serif;
  --transition:      all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Demo page body (only for standalone demo) ── */
body {
  font-family: var(--font);
  background: #f0f4fa;
  margin: 0;
  padding: 2rem 1rem;
}

/* ── Section wrapper ── */
.reg-section {
  padding: 3rem 0 4rem;
}

/* ── Existing site labels ── */
.section-label {
  font-family: var(--font);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rit-orange);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-title {
  font-family: var(--font);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.section-title .accent { color: var(--rit-orange); }

.section-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 520px;
}

/* ================================================================
   FORM CARD
================================================================ */
.rf-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  max-width: 860px;
  margin: 0 auto;
  border: 1px solid var(--border);
}

/* ── Card Header ── */
.rf-header {
  background: linear-gradient(135deg, var(--rit-blue) 0%, var(--rit-blue-light) 100%);
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-bottom: 3px solid var(--rit-orange);
  color:#fff;
}

.rf-header-left {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.rf-logo-wrap { 
  border-radius: 8px; 
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 42px;
}

.rf-logo {
  height: 50px;
  width: auto;
  object-fit: contain;
}

.rf-header-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.rf-brand-sub {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--rit-orange);
  text-transform: uppercase;
  line-height: 1.2;
}

.rf-brand-year {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
}

.rf-title {
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.05em;
  margin: 0;
  text-align: right;
  flex: 1;
}

/* ── Card Body ── */
.rf-body {
  padding: 1.5rem 2rem 2rem;
  background: var(--white);
}

/* ================================================================
   LAYOUT PRIMITIVES
================================================================ */
.rf-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 1.25rem;
  margin-bottom: 1rem;
}

.rf-row-phone {
  grid-template-columns: 1fr 1fr 1fr;
}

.rf-row-4col {
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

.rf-col-6  { /* default 2-col */ }
.rf-col-12 { grid-column: 1 / -1; }
.rf-col-4  { /* 3-col */ }

/* ================================================================
   LABELS
================================================================ */
.rf-label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  text-transform: none;
  letter-spacing: 0;
}

.rf-label-sm {
  display: block;
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.rf-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: var(--rit-blue);
  border-radius: 6px;
  color: var(--white);
  flex-shrink: 0;
}

/* ================================================================
   INPUTS
================================================================ */
.rf-input-wrap { position: relative; }

.rf-input {
  width: 100%;
  height: 40px;
  padding: 0 0.75rem;
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text-primary);
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: var(--transition);
  appearance: none;
}

.rf-input::placeholder { color: var(--gray-400); font-size: 0.8rem; }

.rf-input:hover { border-color: var(--gray-400); }

.rf-input:focus {
  border-color: var(--rit-blue);
  box-shadow: 0 0 0 3px rgba(33,64,118,0.1);
  background: var(--off-white);
}

.rf-input-sm { height: 36px; font-size: 0.8rem; }

/* Phone input with prefix */
.rf-phone-input-wrap {
  display: flex;
  align-items: stretch;
  position: relative;
}

.rf-phone-prefix {
  display: flex;
  align-items: center;
  padding: 0 0.6rem;
  background: var(--gray-50);
  border: 1.5px solid var(--border);
  border-right: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  height: 40px;
}

.rf-input-phone {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  flex: 1;
}

.rf-input-phone:focus { border-color: var(--rit-blue); }

/* ================================================================
   SELECT DROPDOWNS
================================================================ */
.rf-select-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.rf-select {
  width: 100%;
  height: 40px;
  padding: 0 2rem 0 0.75rem;
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text-primary);
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  appearance: none;
  cursor: pointer;
  transition: var(--transition);
  margin-right: 10px;
  margin-top: 10px;
}

.rf-select:hover { border-color: var(--gray-400); }

.rf-select:focus {
  border-color: var(--rit-blue);
  box-shadow: 0 0 0 3px rgba(33,64,118,0.1);
}

.rf-select-arrow {
  position: absolute;
  right: 0.7rem;
  pointer-events: none;
  color: var(--gray-600);
  display: flex;
  align-items: center;
}

/* ================================================================
   RADIO BUTTONS
================================================================ */
.rf-radio-row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  padding-top: 0.15rem;
}

.rf-radio-label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
}

.rf-radio-label:hover { color: var(--rit-blue); }

.rf-radio-label input[type="radio"] {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--gray-400);
  border-radius: 50%;
  position: relative;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

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

.rf-radio-label input[type="radio"]:checked::after {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  background: var(--rit-blue);
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.rf-radio-label input[type="radio"]:focus-visible {
  outline: 2px solid var(--rit-blue);
  outline-offset: 2px;
}

/* ================================================================
   CHECKBOXES (graduation type)
================================================================ */
.rf-checkbox-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 0.15rem;
}

.rf-check-label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.rf-check-label input[type="checkbox"] {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--gray-400);
  border-radius: 4px;
  position: relative;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

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

.rf-check-label input[type="checkbox"]:checked::after {
  content: '';
  display: block;
  width: 4px;
  height: 8px;
  border: 2px solid var(--white);
  border-top: none;
  border-left: none;
  position: absolute;
  top: 1px;
  left: 4px;
  transform: rotate(45deg);
}

/* ================================================================
   SECTION BLOCKS (Team Members, University, Faculty)
================================================================ */
.rf-section-block {
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}

.rf-section-optional {
  background: #fdfaf8;
  border-color: #f0d9d3;
}

.rf-section-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--rit-blue);
  margin-bottom: 0.85rem;
  padding-bottom: 0.65rem;
  border-bottom: 1.5px solid var(--border);
}

.rf-section-header .rf-icon {
  background: var(--rit-blue);
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.rf-optional-tag {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.76rem;
}

/* ── Members Table ── */
.rf-table-wrap {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}

.rf-table-head {
  display: grid;
  grid-template-columns: 100px 1fr 1fr;
  background: var(--rit-blue);
  padding: 0.55rem 0.75rem;
  gap: 0.75rem;
}

.rf-th {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: 0.04em;
}

.rf-table-row {
  display: grid;
  grid-template-columns: 100px 1fr 1fr;
  align-items: center;
  padding: 0.55rem 0.75rem;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border);
  background: var(--white);
  transition: background 0.15s;
}

.rf-table-row:last-child { border-bottom: none; }
.rf-table-row:nth-child(even) { background: var(--off-white); }
.rf-table-row:hover { background: #eef3fb; }

.rf-row-optional { opacity: 0.75; }
.rf-row-optional:hover { opacity: 1; }

.rf-td-member span {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ── University Grid ── */
.rf-uni-grid {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 1rem;
  align-items: start;
}

.rf-uni-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.rf-field-inline label { display: block; }

.rf-uni-illustration {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.6;
}

.rf-building-svg {
  width: 160px;
  height: 120px;
}

/* ================================================================
   FOOTER ROW: Domain + Consent + Submit
================================================================ */
.rf-footer-row {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 1.25rem;
  align-items: end;
  margin-top: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.rf-domain-wrap { }

.rf-consent-submit {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  align-items: flex-start;
}

/* Consent checkbox */
.rf-consent-label {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
  cursor: pointer;
  line-height: 1.5;
}

.rf-consent-checkbox {
  appearance: none;
  width: 16px;
  height: 16px;
  min-width: 16px;
  border: 2px solid var(--gray-400);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  margin-top: 1px;
  transition: var(--transition);
}

.rf-consent-checkbox:checked {
  background: var(--rit-blue);
  border-color: var(--rit-blue);
}

.rf-consent-checkbox:checked::after {
  content: '';
  display: block;
  width: 4px;
  height: 8px;
  border: 2px solid var(--white);
  border-top: none;
  border-left: none;
  position: absolute;
  top: 1px;
  left: 4px;
  transform: rotate(45deg);
}

/* Submit button */
.rf-submit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  height: 48px;
  padding: 0 1.5rem;
  font-family: var(--font);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--white);
  background: linear-gradient(135deg, var(--rit-orange) 0%, var(--rit-orange-dark) 100%);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(237,103,78,0.38);
  text-transform: uppercase;
}

.rf-submit-btn:hover {
  background: linear-gradient(135deg, var(--rit-orange-dark) 0%, #c0421e 100%);
  box-shadow: 0 6px 24px rgba(237,103,78,0.5);
  transform: translateY(-1px);
}

.rf-submit-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(237,103,78,0.3);
}

.rf-submit-btn:focus-visible {
  outline: 3px solid var(--rit-blue);
  outline-offset: 3px;
}

/* ================================================================
   ERROR & SUCCESS STATES
================================================================ */
.form-error {
  display: none;
  font-size: 0.72rem;
  color: #d32f2f;
  margin-top: 0.3rem;
  padding-left: 0.25rem;
}

.form-floating-custom.error .form-error,
.rf-input-wrap.error .form-error { display: block; }

.rf-input-wrap.error .rf-input,
.rf-input.error {
  border-color: #d32f2f;
  box-shadow: 0 0 0 3px rgba(211,47,47,0.1);
}

/* Success message */
.rf-success-msg {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--white);
}

.rf-success-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: #2e7d32;
}

.rf-success-msg h4 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--rit-blue);
  margin-bottom: 0.5rem;
}

.rf-success-msg p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ================================================================
   ANIMATION (fade-up matches existing site)
================================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ================================================================
   RESPONSIVE
================================================================ */

/* Tablet: ≤ 768px */
@media (max-width: 768px) {
  .rf-header {
    padding: 1rem 1.25rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .rf-title {
    font-size: 1.05rem;
    text-align: left;
  }

  .rf-body { padding: 1.25rem 1rem 1.5rem; }

  .rf-row { grid-template-columns: 1fr; gap: 0.85rem; }
  .rf-row-phone { grid-template-columns: 1fr 1fr; }
  .rf-row-4col { grid-template-columns: 1fr 1fr; }
  .rf-col-12 { grid-column: 1 / -1; }

  .rf-table-head,
  .rf-table-row {
    grid-template-columns: 80px 1fr;
  }

  .rf-th-gender, .rf-td-gender {display: inline-block; }

  .rf-uni-grid {
    grid-template-columns: 1fr;
  }

  .rf-uni-illustration { display: none; }
  .rf-uni-fields { grid-template-columns: 1fr; }

  .rf-footer-row {
    grid-template-columns: 1fr;
  }

  .rf-consent-submit { width: 100%; }
}

/* Mobile: ≤ 480px */
@media (max-width: 480px) {
  .rf-card { border-radius: var(--radius-md); }

  .rf-header { padding: 0.85rem; gap: 0.5rem; }

  .rf-body { padding: 1rem 0.85rem 1.25rem; }

  .rf-row-phone { grid-template-columns: 1fr; }
  .rf-row-4col  { grid-template-columns: 1fr; }

  .rf-radio-row { gap: 0.6rem; }

  .rf-section-block { padding: 0.85rem; }

  .rf-table-head,
  .rf-table-row {
    grid-template-columns: 70px 1fr;
    padding: 0.45rem 0.6rem;
  }

  .rf-submit-btn { font-size: 0.82rem; height: 44px; }
}

/* ================================================================
   PRINT
================================================================ */
@media print {
  .rf-header { print-color-adjust: exact; }
  .rf-submit-btn { display: none; }
}