/* ========================================
   FORM VARIANT: FACEBOOK – Minimal, Bleu Dominant
   Inspiré de facebook.com (2025): #1877f2, bordures fines, focus glow bleu
   ======================================== */

/* ————————————————————————
   1. VARIABLES SPÉCIFIQUES FACEBOOK (override global si besoin)
   ———————————————————————— */
   :root {
    /* Couleurs Facebook */
    --fb-primary: #1877f2;
    --fb-primary-dark: #166fe5;
    --fb-bg: #f0f2f5;
    --fb-border: #dddfe2;
    --fb-text: #1c1e21;
    --fb-placeholder: #8f98a1;
    --fb-help: #65676b;
    --fb-error: #e9413f;
    --fb-success: #42b883;

    /* Sizes Facebook-like (plus compact) */
    --fb-padding: 0.625rem 0.875rem; /* ~10px 14px */
    --fb-radius: 6px;
    --fb-field-height: 42px;
    --fb-border-width: 1px;
    --fb-focus-shadow: 0 0 0 2px color-mix(in oklab, var(--fb-primary), transparent 80%);
  }

  /* ————————————————————————
     2. FORM CONTAINER – Fond gris clair comme FB
     ———————————————————————— */
  .form--facebook,
  .form--facebook * {
    background-color: var(--fb-bg);
    color: var(--fb-text);
  }

  .form--facebook {
    --form-bg: var(--fb-bg);
    --form-border: var(--fb-border);
    --form-border-focus: var(--fb-primary);
    --form-border-error: var(--fb-error);
    --form-text: var(--fb-text);
    --form-placeholder: var(--fb-placeholder);
    --form-label: var(--fb-text);
    --form-help: var(--fb-help);
    --form-success: var(--fb-success);

    --form-padding: var(--fb-padding);
    --form-radius: var(--fb-radius);
    --form-field-height: var(--fb-field-height);
    border: none;
    box-shadow: none;
  }

  /* ————————————————————————
     3. LABEL – Plus discret, sans gras excessif
     ———————————————————————— */
  .form--facebook .label {
    font-weight: var(--font-weight-normal);
    color: var(--fb-text);
    font-size: var(--font-size-sm);
    margin-bottom: 0.25rem;
    text-transform: none;

    &--required::after {
      content: "";
      color: var(--fb-error);
      /* Pas d'astérisque visible, FB l'intègre subtilement */
    }
  }

  /* ————————————————————————
     4. INPUTS & TEXTAREA – Bordures fines, focus bleu glow
     ———————————————————————— */
  .form--facebook .input,
  .form--facebook .textarea,
  .form--facebook .select {
    border-width: var(--fb-border-width);
    padding: var(--fb-padding);
    height: var(--fb-field-height);
    font-size: var(--font-size-base);
    background: white;
    border-color: var(--fb-border);
    box-shadow: none;

    &::placeholder {
      color: var(--fb-placeholder);
      font-weight: normal;
    }

    &:focus {
      border-color: var(--fb-primary);
      box-shadow: var(--fb-focus-shadow);
      background: white;
    }

    &--error {
      border-color: var(--fb-error);
      &:focus {
        box-shadow: 0 0 0 2px color-mix(in oklab, var(--fb-error), transparent 80%);
      }
    }

    &--success {
      border-color: var(--fb-success);
      &:focus {
        box-shadow: 0 0 0 2px color-mix(in oklab, var(--fb-success), transparent 80%);
      }
    }

    &:disabled {
      background: #f5f6f5;
      border-color: #ccd0d5;
      color: #bec3c9;
    }
  }

  .form--facebook .textarea {
    min-height: 80px;
    resize: vertical;
    padding-top: var(--fb-padding);
    padding-bottom: var(--fb-padding);
  }

  /* ————————————————————————
     5. SELECT – Icône chevron FB-like
     ———————————————————————— */
  .form--facebook .select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%238f98a1' stroke-width='1.5'%3e%3cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 9.5L10 18m0 0l-9.5-8.5M10 18v-5.25M10 18V18'%3e%3c/path%3e%3c/svg%3e");
    background-size: 16px;
    background-position: right 0.75rem center;
    padding-right: 2rem;
    font-weight: normal;
  }

  /* ————————————————————————
     6. CHECKBOX & RADIO – Style FB (carré/round minimal)
     ———————————————————————— */
  .form--facebook .checkbox,
  .form--facebook .radio {
    + .label::before {
      width: 1rem;
      height: 1rem;
      border: var(--fb-border-width) solid var(--fb-border);
      margin-right: 0.5rem;
      border-radius: 2px;
      background: white;
    }
  }

  .form--facebook .checkbox:checked + .label::before {
    background-color: var(--fb-primary);
    border-color: var(--fb-primary);
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='white' stroke='white' stroke-width='1.5'%3e%3cpath d='M13.485 1.431l.75.75-6.36 6.36-3.535-3.535.75-.75 2.785 2.785z'/%3e%3c/svg%3e");
    background-size: 12px;
    background-position: center;
  }

  .form--facebook .radio + .label::before {
    border-radius: 50%;
  }

  .form--facebook .radio:checked + .label::before {
    background-color: var(--fb-primary);
    border-color: var(--fb-primary);
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='white'%3e%3ccircle cx='8' cy='8' r='4'/%3e%3c/svg%3e");
    background-size: 8px;
  }

  /* ————————————————————————
     7. MESSAGES – Subtils, comme les hints FB
     ———————————————————————— */
  .form--facebook .help-text {
    color: var(--fb-help);
    font-size: var(--font-size-xs);
    margin-top: 0.25rem;
  }

  .form--facebook .error-message {
    color: var(--fb-error);
    &::before {
      background: var(--fb-error);
      content: "!";
    }
  }

  .form--facebook .success-message {
    color: var(--fb-success);
    &::before {
      content: "✓";
      font-weight: bold;
    }
  }

  /* ————————————————————————
     8. BOUTONS – Intégration avec button.css (bleu FB)
     ———————————————————————— */
  .form--facebook .button--primary {
    --button-background-color: var(--fb-primary);
    --button-background-color-hover: var(--fb-primary-dark);
    --button-text-color: white;
    --button-height: var(--fb-field-height);
    padding: var(--fb-padding);
    border-radius: var(--fb-radius);
    font-weight: var(--font-weight-semibold);
    border: none;
  }

  .form--facebook .button--secondary {
    --button-background-color: transparent;
    --button-background-color-hover: #f0f2f5;
    --button-text-color: var(--fb-primary);
    border: var(--fb-border-width) solid var(--fb-primary);
  }

  .form--facebook .button[type="submit"] {
    width: 100%;
    margin-top: 0.5rem;
  }

  /* ————————————————————————
     9. LIENS & FORGOT (comme "Forgot password?" sur FB)
     ———————————————————————— */
  .form--facebook a {
    color: var(--fb-primary);
    font-size: var(--font-size-sm);
    text-decoration: none;
    font-weight: var(--font-weight-medium);

    &:hover {
      text-decoration: underline;
      text-underline-offset: 0.1em;
    }
  }

  /* ————————————————————————
     10. FILE INPUT – Drag & drop FB-like (subtil)
     ———————————————————————— */
  .form--facebook .file-input .file-label {
    border-style: dashed;
    border-color: var(--fb-border);
    padding: var(--fb-padding);
    height: var(--fb-field-height);
    background: white;

    &:hover {
      border-color: var(--fb-primary);
    }
  }

  .form--facebook .file-name {
    color: var(--fb-placeholder);
  }

  /* ————————————————————————
     11. RESPONSIVE – Compact sur mobile comme FB
     ———————————————————————— */
  @media (max-width: 640px) {
    .form--facebook {
      --fb-padding: 0.5rem 0.75rem;
      --fb-field-height: 38px;
    }

    .form--facebook .button[type="submit"] {
      font-size: var(--font-size-md);
    }
  }