/* ============================================
   CONTACT SECTION — task-007
   Styles du formulaire de contact
   ============================================ */

/* Variables (fallback si style.css non charge) */
:root {
  --color-primary: #00D4AA;
  --color-secondary: #1A1A2E;
  --color-accent: #FF6B35;
  --color-bg: #0D0D1A;
  --color-text: #E0E0E0;
  --color-text-muted: #8A8AA0;
  --color-error: #FF4757;
  --color-success: #00D4AA;
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-focus: #00D4AA;
  --color-glass-bg: rgba(26, 26, 46, 0.6);
  --color-glass-border: rgba(255, 255, 255, 0.08);
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
}

/* Section contact */
.contact-section {
  padding: 6rem 1.5rem;
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-section .container {
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
}

/* Header */
.contact-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.3);
  border-radius: 100px;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 0.75rem 0;
  line-height: 1.2;
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}

/* Formulaire */
.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius);
  padding: 2.5rem;
}

/* Groupe de champ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group--full {
  grid-column: 1 / -1;
}

/* Labels */
.form-label {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

.required {
  color: var(--color-accent);
}

/* Inputs communs */
.form-input,
.form-select,
.form-textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  background: rgba(13, 13, 26, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
  box-sizing: border-box;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.6;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15);
}

/* Etat erreur */
.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(255, 71, 87, 0.1);
}

.form-input.valid,
.form-select.valid,
.form-textarea.valid {
  border-color: var(--color-success);
}

/* Select custom */
.form-select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238A8AA0' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-select option {
  background: var(--color-secondary);
  color: var(--color-text);
}

/* Textarea */
.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.textarea-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.char-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-left: auto;
}

/* Messages d'erreur */
.form-error {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-error);
  min-height: 1.1em;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--transition), transform var(--transition);
}

.form-error.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Bouton submit */
.btn {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-bg);
  padding: 0.9rem 2rem;
  width: 100%;
}

.btn-primary:hover {
  background: #00e6b8;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 212, 170, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Loader spinner */
.btn-loader {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid transparent;
  border-top-color: var(--color-bg);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn-submit.loading .btn-text {
  opacity: 0.7;
}

.btn-submit.loading .btn-loader {
  display: inline-block;
}

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

/* Zone de statut du formulaire */
.form-status {
  grid-column: 1 / -1;
  text-align: center;
  padding: 1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.3);
  color: var(--color-success);
}

.form-status.error {
  display: block;
  background: rgba(255, 71, 87, 0.1);
  border: 1px solid rgba(255, 71, 87, 0.3);
  color: var(--color-error);
}

/* Responsive mobile */
@media (max-width: 640px) {
  .contact-section {
    padding: 4rem 1rem;
  }

  .contact-form {
    grid-template-columns: 1fr;
    padding: 1.5rem;
    gap: 1.25rem;
  }

  .form-group--full {
    grid-column: 1;
  }
}