:root {
  --mwd-bg: var(--bs-tertiary-bg);
  --mwd-text: var(--bs-body-color);
  --section-bg: var(--bs-body-bg);
  --section-border: var(--bs-border-color);
  --muted-text: var(--bs-secondary-color);
  --output-bg: var(--bs-body-bg);
  --output-border: var(--bs-border-color);
  --output-text: var(--bs-emphasis-color);
  --hint-bg: rgba(13, 110, 253, 0.08);
  --hint-border: var(--bs-primary);
}

.email-generator-section-main {
  background: var(--section-bg);
  border: 1px solid var(--section-border);
  border-radius: 1.5rem;
  padding: 1.5rem;
  transition:
    background-color 0.25s ease,
    border-color 0.25s ease,
    color 0.25s ease;
}

@media (min-width: 992px) {
  .email-generator-section-main {
    padding: 2rem;
  }
}

.setting-container {
  height: 100%;
  padding: clamp(1rem, 2vw, 1.4rem);
  border: 1px solid var(--bs-border-color);
  background-color: var(--bs-body-bg);
  background-image: linear-gradient(
    135deg,
    rgba(var(--bs-primary-rgb), 0.1),
    rgba(var(--bs-info-rgb), 0.04) 55%,
    transparent
  );
  border-radius: 1rem;
}

[data-bs-theme="dark"] .setting-container {
  background-image: linear-gradient(
    135deg,
    rgba(var(--bs-primary-rgb), 0.2),
    rgba(var(--bs-info-rgb), 0.08) 55%,
    transparent
  );
}

.container-seperator {
  height: 1rem;
}

.card-output {
  margin: 2rem auto;
  background-color: transparent !important;
}

.subtext,
#statusMessage,
.footer-text {
  color: var(--muted-text) !important;
}

.status-message {
  width: 100%;
  margin: 1rem 0;
  padding: 0.35rem 0.75rem;
  text-align: center;
  font-size: 0.875rem;
  line-height: 1.4;
  border-radius: 0.375rem;
  border: 1px solid;
  font-weight: 500;
}

[data-bs-theme="light"] .status-message {
  background-color: rgba(var(--bs-primary-rgb), 0.12);
  border-color: rgba(var(--bs-primary-rgb), 0.4);
  color: var(--bs-primary-text-emphasis);
}

[data-bs-theme="dark"] .status-message {
  background-color: rgba(var(--bs-primary-rgb), 0.22);
  border-color: rgba(var(--bs-primary-rgb), 0.55);
  color: #dbe9ff;
}

.instruction-line {
  font-size: 1rem;
  font-weight: 600;
}

.main-generator {
  padding: clamp(0.5rem, 2vw, 1rem);  
}

.main-generator .form-select,
.main-generator .form-control {
  min-height: 56px;
  font-size: 1.05rem;
}

.email-display-box {
  width: 100%;
  min-height: clamp(180px, 34vh, 420px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 1.6vw, 2rem);
  overflow: hidden;
}

.email-output-wrap {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 1em;
}

.email-output {
  color: var(--output-text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 72px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.01em;
  text-align: center;
  white-space: nowrap;
  display: inline-block;
  max-width: none;
  transform-origin: center center;
  text-rendering: geometricPrecision;
}

.hint-box {
  background: var(--hint-bg);
  border-left: 5px solid var(--hint-border);
  border-radius: 1rem;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.btn-xl {
  min-height: 62px;
  font-size: 1.1rem;
  font-weight: 700;
  padding: 0.95rem 1.25rem;
}

.btn-icon-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  width: 100%;
}

.btn-icon {
  width: 1.25rem;
  text-align: center;
  flex-shrink: 0;
}

.key-highlight {
  animation: keyPulse 0.35s ease;
}

@keyframes keyPulse {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.01);
  }

  100% {
    transform: scale(1);
  }
}

@media (max-width: 768px) {
  .email-generator-section-main {
    border-radius: 1rem;
    padding: 1rem;
  }

  .email-display-box {
    min-height: 150px;
    border-radius: 1rem;
  }

  .btn-xl {
    min-height: 56px;
  }

  .instruction-line {
    font-size: 0.95rem;
  }
}

/* info modal */

  #infoModal {
    --info-accent-rgb: 13, 110, 253;
    --info-surface: var(--bs-tertiary-bg);
    --info-border: var(--bs-border-color);
    --info-muted: var(--bs-secondary-color);
  }

  #infoModal .modal-content {
    overflow: hidden;
    border: 1px solid var(--info-border);
    border-radius: 1.25rem;
    background-color: var(--bs-body-bg);
    box-shadow:
      0 1.5rem 4rem rgba(0, 0, 0, 0.18),
      0 0.25rem 1rem rgba(0, 0, 0, 0.08);
  }

  #infoModal .modal-header {
    align-items: flex-start;
    padding: 1.5rem 1.5rem 1.25rem;
    border-bottom: 1px solid var(--info-border);
    background:
      radial-gradient(
        circle at top left,
        rgba(var(--info-accent-rgb), 0.14),
        transparent 45%
      ),
      var(--bs-body-bg);
  }

  #infoModal .modal-title-wrapper {
    display: flex;
    gap: 1rem;
    align-items: center;
    padding-right: 1rem;
  }

  #infoModal .modal-title-icon {
    display: grid;
    flex: 0 0 auto;
    width: 3rem;
    height: 3rem;
    place-items: center;
    border: 1px solid rgba(var(--info-accent-rgb), 0.25);
    border-radius: 0.9rem;
    color: var(--bs-primary);
    background-color: rgba(var(--info-accent-rgb), 0.12);
  }

  #infoModal .modal-title-icon svg {
    width: 1.5rem;
    height: 1.5rem;
  }

  #infoModal .modal-title {
    margin-bottom: 0.2rem;
    font-weight: 700;
    letter-spacing: -0.025em;
  }

  #infoModal .modal-subtitle {
    margin: 0;
    color: var(--info-muted);
    font-size: 0.925rem;
    line-height: 1.5;
  }

  #infoModal .modal-body {
    padding: 1.5rem;
  }

  #infoModal .modal-introduction {
    margin-bottom: 1.5rem;
    color: var(--bs-body-color);
    font-size: 1.025rem;
    line-height: 1.75;
  }

  #infoModal .modal-section-title {
    margin-bottom: 0.9rem;
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  #infoModal .benefit-list {
    display: grid;
    gap: 0.75rem;
    margin: 0 0 1.5rem;
    padding: 0;
    list-style: none;
  }

  #infoModal .benefit-list li {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    padding: 0.85rem 1rem;
    border: 1px solid var(--info-border);
    border-radius: 0.8rem;
    background-color: var(--info-surface);
  }

  #infoModal .benefit-list li::before {
    display: grid;
    flex: 0 0 auto;
    width: 1.4rem;
    height: 1.4rem;
    margin-top: 0.05rem;
    place-items: center;
    border-radius: 50%;
    color: var(--bs-primary);
    background-color: rgba(var(--info-accent-rgb), 0.14);
    content: "✓";
    font-size: 0.8rem;
    font-weight: 800;
  }

  #infoModal .mwd-modal-body-highlighted-box {
    position: relative;
    overflow: hidden;
    padding: 1.25rem;
    border: 1px solid rgba(var(--info-accent-rgb), 0.35);
    border-radius: 1rem;
    background:
      linear-gradient(
        135deg,
        rgba(var(--info-accent-rgb), 0.15),
        rgba(var(--info-accent-rgb), 0.05)
      );
  }

  #infoModal .mwd-modal-body-highlighted-box::before {
    position: absolute;
    inset: 0 auto 0 0;
    width: 0.3rem;
    background-color: var(--bs-primary);
    content: "";
  }

  #infoModal .teacher-tip {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
  }

  #infoModal .teacher-tip-content {
    flex: 1;
  }

  #infoModal .teacher-tip-label {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--bs-primary);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  #infoModal .teacher-tip p {
    margin: 0;
    line-height: 1.65;
  }

  #infoModal .keyboard-key {
    display: inline-grid;
    min-width: 2.4rem;
    min-height: 2.4rem;
    margin: 0 0.2rem;
    padding: 0.2rem 0.65rem;
    place-items: center;
    border: 1px solid rgba(var(--info-accent-rgb), 0.55);
    border-bottom-width: 0.25rem;
    border-radius: 0.65rem;
    color: var(--bs-primary-text-emphasis);
    background-color: var(--bs-primary-bg-subtle);
    box-shadow: 0 0.2rem 0.6rem rgba(var(--info-accent-rgb), 0.16);
    font-family: var(--bs-font-monospace);
    font-size: 1.15rem;
    font-weight: 800;
    line-height: 1;
    vertical-align: middle;
  }

  #infoModal .keyboard-key-callout {
    display: inline-block;
    margin-top: 0.75rem;
    font-weight: 700;
  }

  #infoModal .modal-footer {
    padding: 1rem 1.5rem 1.5rem;
    border-top: 0;
  }

  #infoModal .modal-footer .btn {
    min-width: 8rem;
    border-radius: 0.7rem;
    font-weight: 600;
  }

  @media (max-width: 575.98px) {
    #infoModal .modal-dialog {
      margin: 0.75rem;
    }

    #infoModal .modal-header,
    #infoModal .modal-body {
      padding: 1.25rem;
    }

    #infoModal .modal-title-icon {
      width: 2.6rem;
      height: 2.6rem;
    }

    #infoModal .teacher-tip {
      display: block;
    }
  }

  @media (prefers-reduced-motion: no-preference) {
    #infoModal.show .keyboard-key {
      animation: info-key-pulse 1.8s ease-in-out 0.35s 2;
    }

    @keyframes info-key-pulse {
      0%,
      100% {
        transform: translateY(0);
        box-shadow: 0 0.2rem 0.6rem rgba(var(--info-accent-rgb), 0.16);
      }

      50% {
        transform: translateY(-0.2rem) scale(1.06);
        box-shadow: 0 0.5rem 1rem rgba(var(--info-accent-rgb), 0.3);
      }
    }
  }