/* ============================================================================
   SCP Student Registration — AY2026-27
   Design tokens
   ============================================================================ */
:root {
  --scp-navy:        #0F2A4A;
  --scp-navy-light:  #1C3D66;
  --scp-gold:        #C99A3C;
  --scp-paper:       #F5F6F4;
  --scp-ink:         #16202B;
  --scp-ink-soft:    #4B5763;
  --scp-line:        #DCE1E5;
  --scp-danger:      #B3261E;
  --scp-success:     #2F6E44;

  --scp-font-head: 'Manrope', 'Segoe UI', sans-serif;
  --scp-font-body: 'Inter', 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

body {
  background: var(--scp-paper);
  color: var(--scp-ink);
  font-family: var(--scp-font-body);
  font-size: 16px;
  line-height: 1.55;
}

/* ---------------------------------------------------------------------------
   Semantic form structure resets (fieldset/legend used for accessibility)
   ------------------------------------------------------------------------- */
fieldset {
  border: 0;
  padding: 0;
  margin: 0;
  min-width: 0;
}

legend.scp-section__title {
  float: none;
  width: auto;
  padding: 0;
  margin-bottom: 0.25rem;
}

.scp-required {
  color: var(--scp-danger);
  margin-left: 0.15rem;
}

.scp-skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--scp-navy);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 1000;
  border-radius: 0 0 4px 0;
  text-decoration: none;
}
.scp-skip-link:focus { left: 0; }

.scp-footer {
  text-align: center;
  color: var(--scp-ink-soft);
  font-size: 0.85rem;
  padding: 2rem 1rem 3rem;
}

.scp-noscript-banner {
  background: #FFF6E5;
  border-bottom: 1px solid #F0DCA6;
  color: #6B5417;
  padding: 0.85rem 1.25rem;
  text-align: center;
  font-size: 0.9rem;
}

/* ---------------------------------------------------------------------------
   Header banner
   ------------------------------------------------------------------------- */
.scp-header {
  background: var(--scp-navy);
  color: #fff;
  padding: 2rem 0 1.75rem;
  border-bottom: 4px solid var(--scp-gold);
}

.scp-header__eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: #C9D6E4;
  margin-bottom: 0.35rem;
}

.scp-header__title {
  font-family: var(--scp-font-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  margin: 0;
  letter-spacing: -0.01em;
}

.scp-header__meta {
  color: #C9D6E4;
  font-size: 0.95rem;
  margin-top: 0.4rem;
}

.scp-header__meta strong { color: var(--scp-gold); font-weight: 600; }

/* ---------------------------------------------------------------------------
   Layout: sticky section nav + form column
   ------------------------------------------------------------------------- */
.scp-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1rem 4rem;
}

.scp-nav {
  position: sticky;
  top: 1.5rem;
}

.scp-nav__item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.6rem 0.25rem;
  color: var(--scp-ink-soft);
  text-decoration: none;
  border-left: 2px solid var(--scp-line);
  padding-left: 0.9rem;
  font-size: 0.92rem;
  transition: color .15s ease, border-color .15s ease;
}

.scp-nav__item.is-active {
  color: var(--scp-navy);
  border-left-color: var(--scp-gold);
  font-weight: 600;
}

.scp-nav__num {
  font-family: var(--scp-font-head);
  font-weight: 700;
  color: var(--scp-gold);
  min-width: 1.4rem;
}

/* ---------------------------------------------------------------------------
   Form sections
   ------------------------------------------------------------------------- */
.scp-section {
  border-top: 1px solid var(--scp-line);
  padding: 2rem 0;
  scroll-margin-top: 1.5rem;
}

.scp-section:first-of-type { border-top: none; padding-top: 0.5rem; }

.scp-section__title {
  font-family: var(--scp-font-head);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--scp-navy);
  margin-bottom: 0.25rem;
}

.scp-section__hint {
  color: var(--scp-ink-soft);
  font-size: 0.92rem;
  margin-bottom: 1.5rem;
}

label.form-label {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--scp-ink);
  margin-bottom: 0.3rem;
}

label.form-label .scp-optional {
  font-weight: 400;
  color: var(--scp-ink-soft);
  font-size: 0.8rem;
}

.form-text { color: var(--scp-ink-soft); font-size: 0.8rem; }

.form-control, .form-select {
  border: 1px solid var(--scp-line);
  border-radius: 4px;
  padding: 0.55rem 0.75rem;
  font-size: 0.96rem;
  background: #fff;
}

.form-control:focus, .form-select:focus {
  border-color: var(--scp-navy-light);
  box-shadow: 0 0 0 3px rgba(28, 61, 102, 0.15);
}

.scp-uppercase-input { text-transform: uppercase; }
.scp-uppercase-input::placeholder { text-transform: none; }

.is-invalid ~ .invalid-feedback,
.form-control.is-invalid,
.form-select.is-invalid {
  border-color: var(--scp-danger);
}

.invalid-feedback { font-size: 0.82rem; }

/* Conditional occupation blocks (SCCL Employee / Non-SCCL Employee) */
.scp-conditional-block {
  border-left: 2px solid var(--scp-gold);
  padding-left: 1rem;
  margin-top: 1rem;
  display: none;
}
.scp-conditional-block.is-visible { display: block; }
#non-sccl-occupation-other-wrap { display: none; }
#non-sccl-occupation-other-wrap.is-visible { display: block; }

/* Declaration */
.scp-declaration {
  background: #fff;
  border: 1px solid var(--scp-line);
  border-left: 3px solid var(--scp-navy);
  padding: 1.1rem 1.25rem;
  font-size: 0.92rem;
  color: var(--scp-ink-soft);
  border-radius: 4px;
}

/* Submit bar */
.scp-submit-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.btn-scp-primary {
  background: var(--scp-navy);
  border: 1px solid var(--scp-navy);
  color: #fff;
  font-weight: 600;
  padding: 0.7rem 1.9rem;
  border-radius: 4px;
  transition: background .15s ease;
}
.btn-scp-primary:hover { background: var(--scp-navy-light); color: #fff; }
.btn-scp-primary:disabled { opacity: 0.55; cursor: not-allowed; }

/* Alert banners (server-side result messages) */
.scp-alert {
  border-radius: 4px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.75rem;
  font-size: 0.95rem;
  border: 1px solid transparent;
}
.scp-alert--success { background: #EAF4EC; border-color: #BFDFC7; color: var(--scp-success); }
.scp-alert--error   { background: #FBEAEA; border-color: #F0C4C2; color: var(--scp-danger); }
.scp-alert--error ul { margin: 0.4rem 0 0; padding-left: 1.2rem; }

@media (max-width: 991px) {
  .scp-nav { position: static; display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; margin-bottom: 2rem; }
  .scp-nav__item { border-left: none; border-bottom: 2px solid var(--scp-line); padding: 0.35rem 0.1rem; }
  .scp-nav__item.is-active { border-bottom-color: var(--scp-gold); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

/* ---------------------------------------------------------------------------
   Student photo upload
   ------------------------------------------------------------------------- */
.scp-photo-upload {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.scp-photo-preview {
  width: 96px;
  height: 120px;
  border: 1px dashed var(--scp-line);
  border-radius: 4px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: var(--scp-ink-soft);
  font-size: 0.72rem;
  text-align: center;
  padding: 0.25rem;
  flex-shrink: 0;
}

.scp-photo-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scp-photo-upload__controls {
  flex: 1;
  min-width: 220px;
}

.scp-photo-remove {
  background: none;
  border: none;
  color: var(--scp-danger);
  font-size: 0.82rem;
  padding: 0.2rem 0;
  text-decoration: underline;
  cursor: pointer;
  display: none;
}
.scp-photo-remove.is-visible { display: inline-block; }