/* ============================================================
   R1YC Student Prom Day Waiver Form — Stylesheet
   Mobile-first, responsive
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  --primary:       #1a3c6e;
  --primary-dark:  #112a50;
  --primary-light: #2a5298;
  --accent:        #c0392b;
  --gold:          #f5a623;
  --gold-light:    #fef3dc;
  --bg:            #eef2f7;
  --card:          #ffffff;
  --text:          #2d3748;
  --muted:         #718096;
  --border:        #d1d9e6;
  --success:       #27ae60;
  --error-bg:      #fff5f5;
  --error-border:  #fed7d7;
  --error-text:    #c53030;
  --radius-sm:     8px;
  --radius:        14px;
  --radius-lg:     20px;
  --shadow-sm:     0 1px 3px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
  --shadow:        0 4px 12px rgba(0,0,0,.10), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:     0 10px 30px rgba(0,0,0,.12), 0 4px 8px rgba(0,0,0,.06);
  --transition:    .2s ease;
  --font:          'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ---------- Utility ---------- */
.hidden { display: none !important; }

/* ============================================================
   LANGUAGE MODAL
   ============================================================ */
.lang-modal {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.5rem;
}

.lang-modal-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: fadeUp .4s ease both;
}

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

.lang-modal-logo {
  width: 90px;
  height: 90px;
  object-fit: contain;
  border-radius: 50%;
  margin: 0 auto 1.25rem;
  border: 3px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.lang-modal-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.35;
  margin-bottom: .5rem;
}

.lang-modal-subtitle {
  font-size: .9rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

.lang-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.lang-btn {
  flex: 1;
  min-width: 130px;
  padding: .85rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  font-size: 1.05rem;
  font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition);
}

.lang-btn:first-child {
  background: var(--primary);
  color: #fff;
}

.lang-btn:last-child {
  background: var(--gold);
  color: var(--primary-dark);
}

.lang-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.lang-btn:active { transform: translateY(0); }

/* ============================================================
   APP WRAPPER
   ============================================================ */
.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- Header ---------- */
.site-header {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #fff;
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-logo {
  width: 52px;
  height: 52px;
  object-fit: contain;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,.3);
  flex-shrink: 0;
}

.header-text { flex: 1; }

.header-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.3;
}

.header-subtitle {
  font-size: .78rem;
  opacity: .8;
  margin-top: 2px;
}

.lang-switch-btn {
  background: rgba(255,255,255,.15);
  border: 1.5px solid rgba(255,255,255,.4);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: .45rem .9rem;
  font-size: .82rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background var(--transition);
  flex-shrink: 0;
}

.lang-switch-btn:hover { background: rgba(255,255,255,.25); }

/* ---------- Main Content ---------- */
.main-content {
  flex: 1;
  padding: 1.5rem 1rem 3rem;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

/* ---------- Form Note ---------- */
.form-note {
  background: var(--gold-light);
  border-left: 4px solid var(--gold);
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
  font-size: .88rem;
  color: var(--text);
  margin-bottom: 1.5rem;
}

/* ---------- Form Sections ---------- */
.form-section {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.section-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1.1rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  gap: .5rem;
}

.section-title::before {
  content: '';
  width: 4px;
  height: 1.1em;
  background: var(--gold);
  border-radius: 2px;
  display: inline-block;
  flex-shrink: 0;
}

/* ---------- Form Groups ---------- */
.form-group {
  margin-bottom: 1.1rem;
}

.form-group:last-child { margin-bottom: 0; }

.form-group label {
  display: block;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: .4rem;
}

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"],
.form-group input[type="date"],
.form-group textarea {
  width: 100%;
  padding: .65rem .9rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  color: var(--text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,60,110,.12);
}

.form-group input[readonly] {
  background: #f7f9fc;
  color: var(--muted);
  cursor: default;
}

.form-group textarea {
  resize: vertical;
  min-height: 88px;
}

/* ---------- Form Row (two columns) ---------- */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 520px) {
  .form-row { grid-template-columns: 1fr; }
}

/* ---------- Waiver Text Box ---------- */
.waiver-box {
  background: #f7f9fc;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 1rem;
}

/* ---------- Radio Group ---------- */
.radio-group {
  display: flex;
  flex-direction: column;
  gap: .65rem;
}

.radio-label {
  display: flex;
  align-items: flex-start;
  gap: .65rem;
  cursor: pointer;
  padding: .75rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), background var(--transition);
  font-size: .92rem;
}

.radio-label:hover { border-color: var(--primary); background: #f5f8ff; }

.radio-label input[type="radio"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--primary);
  flex-shrink: 0;
}

.radio-label:has(input:checked) {
  border-color: var(--primary);
  background: #f0f4ff;
}

.radio-text { flex: 1; }

/* ---------- Signatures Section ---------- */
.signatures-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

@media (max-width: 600px) {
  .signatures-grid { grid-template-columns: 1fr; }
}

.sig-block-title {
  font-size: .92rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: .75rem;
}

/* ---------- Signature Field Component ---------- */
.sig-field {}

.sig-tabs {
  display: flex;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  overflow: hidden;
  border-bottom: none;
}

.sig-tab {
  flex: 1;
  padding: .55rem .5rem;
  font-size: .82rem;
  font-weight: 600;
  background: #f7f9fc;
  border: none;
  color: var(--muted);
  transition: background var(--transition), color var(--transition);
}

.sig-tab + .sig-tab { border-left: 1.5px solid var(--border); }

.sig-tab.active {
  background: var(--primary);
  color: #fff;
}

.sig-tab:hover:not(.active) {
  background: var(--border);
  color: var(--text);
}

.sig-panel {
  border: 1.5px solid var(--border);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  overflow: hidden;
  background: #fff;
}

/* Draw panel */
.canvas-wrap {
  position: relative;
  background: #fff;
  border-bottom: 1.5px dashed var(--border);
}

.sig-canvas {
  display: block;
  width: 100%;
  height: 150px;
  touch-action: none;
  cursor: crosshair;
}

.sig-hint {
  text-align: center;
  font-size: .75rem;
  color: var(--muted);
  padding: .3rem;
  pointer-events: none;
  position: absolute;
  bottom: 4px;
  left: 0; right: 0;
}

.sig-actions {
  padding: .5rem;
  display: flex;
  justify-content: flex-end;
}

.sig-clear-btn {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .3rem .75rem;
  font-size: .78rem;
  color: var(--muted);
  transition: color var(--transition), border-color var(--transition);
}

.sig-clear-btn:hover { color: var(--accent); border-color: var(--accent); }

/* Upload panel */
.upload-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: 1.5rem 1rem;
  cursor: pointer;
  transition: background var(--transition);
  min-height: 150px;
  border-bottom: 1.5px dashed var(--border);
}

.upload-area:hover { background: #f5f8ff; }

.upload-area input[type="file"] {
  position: absolute;
  width: 1px; height: 1px;
  opacity: 0; overflow: hidden;
  clip: rect(0,0,0,0);
}

.upload-icon {
  font-size: 1.8rem;
  opacity: .5;
}

.upload-label-text {
  font-size: .83rem;
  color: var(--muted);
  text-align: center;
}

.upload-preview {
  padding: .5rem;
  text-align: center;
}

.upload-preview-img {
  max-height: 120px;
  max-width: 100%;
  border-radius: 4px;
  border: 1px solid var(--border);
  margin: 0 auto .4rem;
}

/* ---------- Error Alert ---------- */
.form-error {
  background: var(--error-bg);
  border: 1.5px solid var(--error-border);
  border-radius: var(--radius-sm);
  color: var(--error-text);
  padding: .75rem 1rem;
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  animation: shake .3s ease;
}

@keyframes shake {
  0%,100%  { transform: translateX(0); }
  25%,75%  { transform: translateX(-4px); }
  50%      { transform: translateX(4px); }
}

/* ---------- Submit Area ---------- */
.submit-area {
  text-align: center;
  padding: .5rem 0 .25rem;
}

.submit-btn {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 1rem 3rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .3px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  min-width: 200px;
}

.submit-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.submit-btn:active { transform: translateY(0); }
.submit-btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }

.footer-note {
  font-size: .8rem;
  color: var(--muted);
  margin-top: .75rem;
}

/* ---------- Loading Overlay ---------- */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26,60,110,.7);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 999;
  gap: 1.25rem;
  backdrop-filter: blur(4px);
}

.spinner {
  width: 52px;
  height: 52px;
  border: 4px solid rgba(255,255,255,.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  padding: 0 2rem;
}

/* ============================================================
   INLINE SUCCESS STATE  (inside .main-content)
   ============================================================ */
.success-state {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  animation: fadeUp .4s ease both;
}

.success-state .success-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--success), #2ecc71);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  font-size: 2rem;
  color: #fff;
}

.success-state h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: .6rem;
}

.success-state p {
  color: var(--muted);
  margin-bottom: 1.75rem;
  font-size: .95rem;
}

.success-back-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: .85rem 2rem;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}

.success-back-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* ============================================================
   SUCCESS PAGE  (standalone success.html)
   ============================================================ */
.success-page {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.success-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  max-width: 440px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: fadeUp .5s ease both;
}

.success-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--success), #2ecc71);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  font-size: 2rem;
}

.success-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: .6rem;
}

.success-text {
  color: var(--muted);
  margin-bottom: 1.75rem;
  font-size: .95rem;
}

.success-back-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: .85rem 2rem;
  font-size: .95rem;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}

.success-back-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* ---------- Responsive tweaks ---------- */
@media (max-width: 480px) {
  .site-header { padding: 1rem; }
  .main-content { padding: 1rem .75rem 2.5rem; }
  .form-section { padding: 1.1rem 1rem; }
  .lang-modal-card { padding: 2rem 1.25rem; }
  .submit-btn { width: 100%; }
  .lang-buttons { flex-direction: column; }
  .lang-btn { min-width: unset; }
}