* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
:root {
  --bg:         #0d0f14;
  --surface:    #151820;
  --surface2:   #1c2130;
  --border:     #252a35;
  --border-h:   #353d50;
  --accent:     #5b8af5;
  --accent2:    #a78bfa;
  --accent3:    #4ade80;
  --danger:     #f87171;
  --warn:       #fbbf24;
  --text:       #e8ecf4;
  --muted:      #7a8299;
  --radius:     14px;
  --radius-sm:  8px;
  --transition: 0.22s ease;
}
html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.28;
  pointer-events: none;
  z-index: 0;
}
body::after {
  content: '';
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(91, 138, 245, 0.14), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 15, 20, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.back-link {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.85rem;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--transition);
}
.back-link:hover { color: var(--accent); }
.back-link svg { transition: transform var(--transition); }
.back-link:hover svg { transform: translateX(-3px); }
.header-tp {
  font-family: 'Syne', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(91, 138, 245, 0.3);
  background: rgba(91, 138, 245, 0.07);
  padding: 4px 12px;
  border-radius: 100px;
}

.main {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}
.page-intro {
  text-align: center;
  margin-bottom: 48px;
}
.page-intro h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.accent {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.required { color: var(--danger); margin-left: 2px; }

.form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  animation: fadeUp 0.5s ease both;
}

.fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 28px 24px;
  background: rgba(255, 255, 255, 0.015);
  transition: border-color var(--transition);
}
.fieldset:focus-within {
  border-color: rgba(91, 138, 245, 0.3);
}
.fieldset--flat {
  border: none;
  background: none;
  padding: 0;
}
.legend {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Syne', sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text);
  padding: 0 8px;
  margin-bottom: 22px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.field-row:last-child { margin-bottom: 0; }
.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
}
.label-counter {
  font-size: 0.78rem;
  color: var(--muted);
  margin-left: auto;
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.input-icon {
  position: absolute;
  left: 13px;
  color: var(--muted);
  pointer-events: none;
  transition: color var(--transition);
}
.input-wrap:focus-within .input-icon { color: var(--accent); }
.input,
.textarea {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.93rem;
  padding: 11px 14px 11px 40px;
  outline: none;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}
.textarea {
  padding: 11px 14px;
  resize: vertical;
  min-height: 100px;
}
.input--date::-webkit-calendar-picker-indicator {
  filter: invert(0.5);
  cursor: pointer;
}
.input:hover,
.textarea:hover { border-color: var(--border-h); }
.input:focus,
.textarea:focus {
  border-color: var(--accent);
  background: rgba(21, 24, 32, 0.9);
  box-shadow: 0 0 0 3px rgba(91, 138, 245, 0.15);
}
.input::placeholder,
.textarea::placeholder { color: #4a5068; }
.input--error {
  border-color: var(--danger) !important;
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.12) !important;
}
.input--valid {
  border-color: var(--accent3) !important;
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.1) !important;
}
.error-msg {
  font-size: 0.78rem;
  color: var(--danger);
  min-height: 16px;
  display: block;
}
.hint-msg {
  font-size: 0.76rem;
  color: var(--muted);
  display: block;
}

.strength-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}
.strength-track {
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 100px;
  overflow: hidden;
}
.strength-fill {
  height: 100%;
  width: 0;
  border-radius: 100px;
  transition: width 0.35s ease, background 0.35s ease;
}
.strength--weak   { background: var(--danger); }
.strength--medium { background: var(--warn); }
.strength--strong { background: var(--accent3); }
.strength-label {
  font-size: 0.75rem;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  min-width: 36px;
  color: var(--muted);
}
.pw-rules {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 6px;
}
.pw-rule {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  color: var(--muted);
  transition: color var(--transition);
}
.rule-icon {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1.5px solid var(--muted);
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition);
}
.pw-rule--ok   { color: var(--accent3); }
.pw-rule--fail { color: var(--danger); }
.pw-rule--ok .rule-icon   { background: var(--accent3); border-color: var(--accent3); }
.pw-rule--fail .rule-icon { background: rgba(248, 113, 113, 0.2); border-color: var(--danger); }

.radio-label,
.checkbox-label {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface2);
  user-select: none;
  color: var(--muted);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.radio-label    { gap: 8px;  font-size: 0.9rem;  padding: 8px 14px; }
.checkbox-label { gap: 10px; font-size: 0.88rem; padding: 10px 14px; }
.radio-label:hover    { border-color: var(--accent); color: var(--text); }
.checkbox-label:hover { border-color: var(--border-h); color: var(--text); }
.radio-label input[type="radio"],
.checkbox-label input[type="checkbox"] { display: none; }
.radio-label:has(input:checked),
.checkbox-label:has(input:checked) {
  border-color: var(--accent);
  background: rgba(91, 138, 245, 0.08);
  color: var(--text);
}
.radio-group   { display: flex; flex-wrap: wrap; gap: 10px; padding-top: 4px; }
.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
  padding-top: 4px;
}
.radio-custom {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  flex-shrink: 0;
  position: relative;
  border: 2px solid var(--border-h);
  transition: border-color var(--transition);
}
.radio-custom::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0;
  transform: scale(0);
  transition: opacity var(--transition), transform var(--transition);
}
.radio-label input:checked ~ .radio-custom { border-color: var(--accent); }
.radio-label input:checked ~ .radio-custom::after { opacity: 1; transform: scale(1); }
.checkbox-custom {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  flex-shrink: 0;
  position: relative;
  border: 2px solid var(--border-h);
  transition: background var(--transition), border-color var(--transition);
}
.checkbox-custom::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 1px;
  width: 6px;
  height: 10px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) scale(0);
  transition: transform var(--transition);
}
.checkbox-label input:checked ~ .checkbox-custom { background: var(--accent); border-color: var(--accent); }
.checkbox-label input:checked ~ .checkbox-custom::after { transform: rotate(45deg) scale(1); }
.checkbox-label--cgu {
  display: flex;
  align-items: flex-start;
  padding: 14px 18px;
  background: rgba(91, 138, 245, 0.04);
  font-size: 0.9rem;
  line-height: 1.5;
  gap: 12px;
}
.checkbox-label--cgu .checkbox-custom { margin-top: 2px; }
.link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}
.link:hover { color: #93b4f8; }

.file-drop {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface2);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}
.file-drop:hover,
.file-drop--over {
  border-color: var(--accent);
  background: rgba(91, 138, 245, 0.06);
}
.file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}
.file-drop-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 28px 20px;
  color: var(--muted);
  font-size: 0.88rem;
  pointer-events: none;
  text-align: center;
}
.file-btn {
  display: inline-block;
  padding: 7px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: 'Syne', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(91, 138, 245, 0.08);
}
.file-preview {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
}
.file-name {
  font-size: 0.82rem;
  color: var(--text);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-remove {
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: var(--danger);
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 0.78rem;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}
.file-remove:hover { background: rgba(248, 113, 113, 0.2); }

.form-actions {
  display: flex;
  justify-content: flex-end;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 10px;
  font-family: 'Syne', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover {
  background: #7aa3f7;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(91, 138, 245, 0.4);
}
.btn-primary:active { transform: none; }

.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 22px 24px;
  font-size: 0.82rem;
  color: var(--muted);
}
.footer-inner {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

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

@media (max-width: 640px) {
  .main          { padding: 40px 16px 60px; }
  .form-card     { padding: 24px 18px; gap: 24px; }
  .fieldset      { padding: 20px 16px 18px; }
  .field-row     { grid-template-columns: 1fr; gap: 16px; }
  .checkbox-grid { grid-template-columns: 1fr; }
  .radio-group   { flex-direction: column; }
  .form-actions  { flex-direction: column; }
  .btn           { width: 100%; justify-content: center; }
}
@media (max-width: 400px) {
  .page-intro h1 { font-size: 1.8rem; }
}