:root {
  --primary-blue: #4A90E2;
  --secondary-green: #50C878;
  --accent-red: #FF6B6B;
  --dark-text: #343A40;
  --light-bg: #F5F7FA;
  --card-bg: #FFFFFF;
  --border-gray: #D1D9E6;
  --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 8px 20px rgba(0, 0, 0, 0.12);
  --gradient-main: linear-gradient(135deg, var(--primary-blue) 0%, #357ABD 100%);
  --gradient-secondary: linear-gradient(135deg, #8D99AE 0%, #6B7A8F 100%);
  --success-color: #28a745;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--light-bg);
  color: var(--dark-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: radial-gradient(circle at top left, var(--light-bg), var(--card-bg) 70%);
}

.app-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  align-items: center;
  justify-content: flex-start;
  padding: 0;
}

.flag-strip-top,
.flag-strip-bottom {
  height: 8px;
  width: 100%;
  display: flex;
}

.flag-strip-top:before {
  content: "";
  flex: 1;
  background-image: linear-gradient(to right, #0096FF, #0096FF 33%, #E30A17 33%, #E30A17 66%, #009B48 66%, #009B48 100%);
}

.flag-strip-top:after {
  content: "";
  flex: 1;
  background-image: linear-gradient(to right, #009B48, #009B48 33%, #0096FF 33%, #0096FF 66%, #E30A17 66%, #E30A17 100%);
}

.flag-strip-bottom:before {
  content: "";
  flex: 1;
  background-image: linear-gradient(to right, #009B48, #009B48 33%, #E30A17 33%, #E30A17 66%, #0096FF 66%, #0096FF 100%);
}

.flag-strip-bottom:after {
  content: "";
  flex: 1;
  background-image: linear-gradient(to right, #E30A17, #E30A17 33%, #009B48 33%, #009B48 66%, #0096FF 66%, #0096FF 100%);
}

header {
  padding: 15px 0;
  background-color: var(--card-bg);
  box-shadow: var(--shadow-light);
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 25px;
}

.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-icon {
  background: var(--gradient-main);
  color: var(--card-bg);
  width: 55px;
  height: 55px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.4rem;
  border-radius: 12px;
  margin-right: 12px;
  box-shadow: 0 6px 15px rgba(74, 144, 226, 0.3);
  transition: transform 0.3s ease;
}

.logo-icon:hover {
  transform: scale(1.05);
}

.logo-text h1 {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--dark-text);
  margin: 0;
  line-height: 1.2;
}

.logo-text p {
  color: #6B7A8F;
  font-size: 0.85rem;
  margin: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-actions .header-link {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: 8px;
  transition: all 0.3s ease;
  background-color: transparent;
  border: none;
  cursor: pointer;
}

.header-actions .header-link:hover {
  background-color: #E6F3FF;
  color: #357ABD;
}

.header-actions .bmc-button-header img {
  height: 40px;
  width: auto;
  display: block;
  border-radius: 8px;
  transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.header-actions .bmc-button-header img:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

main {
  flex: 1;
  padding: 40px 25px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  width: 100%;
}

.card {
  background-color: var(--card-bg);
  border-radius: 16px;
  box-shadow: var(--shadow-medium);
  width: 100%;
  max-width: 750px;
  overflow: hidden;
  position: relative;
  border: 1px solid var(--border-gray);
  transition: transform 0.3s ease;
}

.card.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.card-content {
  padding: 35px;
}

.intro {
  text-align: center;
  margin-bottom: 30px;
}

.intro h2 {
  color: var(--dark-text);
  font-size: 1.8rem;
  margin-bottom: 12px;
  font-weight: 700;
}

.intro p {
  color: #6B7A8F;
  font-size: 1.05rem;
  line-height: 1.6;
}

.excuse-count {
  margin-top: 20px;
  font-size: 1rem;
  color: var(--dark-text);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: #E6F3FF;
  padding: 10px 20px;
  border-radius: 25px;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
  box-shadow: 0 3px 8px rgba(74, 144, 226, 0.15);
}

.excuse-count i {
  color: var(--primary-blue);
  font-size: 1.2rem;
}

.excuse-count span {
  font-weight: 700;
  color: var(--primary-blue);
}

.important-notice {
  background-color: #FFF8E1;
  color: #A07200;
  border: 1px solid #FFECB3;
  border-radius: 10px;
  padding: 18px 25px;
  margin-bottom: 30px;
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.5;
  box-shadow: 0 2px 8px rgba(255, 193, 7, 0.1);
}

.important-notice p {
  margin: 0;
}

.important-notice strong {
  font-weight: 700;
}

.form-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 25px;
  margin-bottom: 35px;
}

.input-group {
  display: flex;
  flex-direction: column;
}

label {
  color: var(--dark-text);
  margin-bottom: 10px;
  font-size: 0.95rem;
  font-weight: 500;
}

input,
select {
  padding: 14px 18px;
  border: 1px solid var(--border-gray);
  border-radius: 10px;
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  transition: all 0.3s ease;
  background-color: var(--light-bg);
  color: var(--dark-text);
}

input::placeholder {
  color: #9AA7B8;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.25);
  background-color: var(--card-bg);
}

#category-select.changed {
  border-color: var(--secondary-green);
  box-shadow: 0 0 0 4px rgba(80, 200, 120, 0.25);
}

.select-wrapper {
  position: relative;
}

.select-wrapper:after {
  content: "▼";
  font-size: 0.7rem;
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: #9AA7B8;
  pointer-events: none;
}

select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  width: 100%;
  background-color: var(--light-bg);
  cursor: pointer;
}

.yox-button,
.random-category-button {
  grid-column: 1 / -1;
  color: var(--card-bg);
  border: none;
  padding: 16px 30px;
  font-family: 'Poppins', sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  letter-spacing: 0.5px;
}

.yox-button {
  background: var(--gradient-main);
  box-shadow: 0 6px 15px rgba(74, 144, 226, 0.4);
}

.yox-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(74, 144, 226, 0.5);
}

.yox-button:active,
.yox-button.clicked {
  transform: translateY(0);
  box-shadow: 0 3px 8px rgba(74, 144, 226, 0.3);
}

.random-category-button {
  background: var(--gradient-secondary);
  box-shadow: 0 6px 15px rgba(141, 153, 174, 0.4);
  margin-bottom: 15px;
}

.random-category-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(141, 153, 174, 0.5);
}

.random-category-button:active {
  transform: translateY(0);
  box-shadow: 0 3px 8px rgba(141, 153, 174, 0.3);
}

.button-text {
  margin-right: 12px;
}

.button-icon {
  font-size: 1.3rem;
  transition: transform 0.3s ease;
}

.yox-button:hover .button-icon {
  transform: translateX(8px);
}

.loading-spinner {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 30px 0;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 5px solid rgba(74, 144, 226, 0.2);
  border-radius: 50%;
  border-top-color: var(--primary-blue);
  animation: spin 1s ease-in-out infinite;
  margin-bottom: 15px;
}

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

.loading-spinner span {
  color: #6B7A8F;
  font-size: 1rem;
  font-weight: 500;
}

.result-container {
  background: linear-gradient(135deg, #F0F4F8 0%, #E0E6ED 100%);
  border-radius: 12px;
  padding: 40px 30px 30px 30px;
  margin-top: 30px;
  position: relative;
  border: 1px solid #C0CCDA;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
  display: none;
}

.result-badge {
  position: absolute;
  top: 0px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent-red);
  color: var(--card-bg);
  padding: 6px 18px;
  font-size: 0.85rem;
  border-radius: 0 0 10px 10px;
  font-weight: 600;
  box-shadow: 0 3px 8px rgba(255, 107, 107, 0.3);
  z-index: 10;
  white-space: nowrap;
  letter-spacing: 0.5px;
}

.result-text {
  margin-top: 15px;
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--dark-text);
  word-wrap: break-word;
  white-space: pre-wrap;
  margin-bottom: 25px;
  font-weight: 400;
}

.result-actions {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

.action-button {
  background-color: var(--primary-blue);
  color: var(--card-bg);
  border: none;
  padding: 12px 25px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.3s ease;
  box-shadow: 0 3px 8px rgba(74, 144, 226, 0.2);
}

.action-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 12px rgba(74, 144, 226, 0.3);
}

.action-button:active {
  transform: translateY(0);
  box-shadow: 0 1px 5px rgba(74, 144, 226, 0.15);
}

.copy-button {
  background-color: var(--primary-blue);
}

.copy-button.success {
  background-color: var(--success-color);
  box-shadow: 0 3px 8px rgba(40, 167, 69, 0.3);
}

.share-button {
  background-color: #8D99AE;
}

.share-button.success {
  background-color: var(--success-color);
  box-shadow: 0 3px 8px rgba(40, 167, 69, 0.3);
}

.history-container {
  margin-top: 50px;
  background-color: var(--card-bg);
  border-radius: 16px;
  padding: 30px;
  box-shadow: inset 0 3px 10px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-gray);
  display: none;
}

.history-container h3 {
  text-align: center;
  color: var(--dark-text);
  font-size: 1.4rem;
  margin-bottom: 25px;
  font-weight: 700;
  position: relative;
}

.history-container h3:after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--primary-blue);
  margin: 12px auto 0;
  border-radius: 2px;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.history-item {
  background-color: var(--light-bg);
  border: 1px solid #E0E6ED;
  border-radius: 10px;
  padding: 18px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  cursor: pointer;
}

.history-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
  border-color: var(--primary-blue);
}

.history-item.highlight {
  background-color: #EBF7EE;
  border-color: var(--secondary-green);
  box-shadow: 0 0 0 4px rgba(80, 200, 120, 0.25);
  transform: scale(1.01);
}

.history-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed #D1D9E6;
}

.history-category {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-blue);
  background-color: #E6F3FF;
  padding: 5px 12px;
  border-radius: 20px;
}

.history-time {
  font-size: 0.8rem;
  color: #8D99AE;
}

.history-message {
  font-size: 1rem;
  color: #555;
  line-height: 1.6;
  word-wrap: break-word;
  white-space: pre-wrap;
  font-weight: 300;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

footer {
  background-color: var(--card-bg);
  text-align: center;
  padding: 20px 25px;
  box-shadow: 0 -3px 12px rgba(0, 0, 0, 0.08);
  width: 100%;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-content p {
  margin: 5px 0;
  color: #6B7A8F;
  font-size: 0.88rem;
}

.footer-content a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 500;
}

.footer-content a:hover {
  text-decoration: underline;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.modal-content {
  background-color: var(--card-bg);
  margin: auto;
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  width: 90%;
  max-width: 600px;
  position: relative;
  animation: modalOpen 0.4s ease-out forwards;
  border: 1px solid var(--border-gray);
}

@keyframes modalOpen {
  from {
    opacity: 0;
    transform: translateY(-50px) scale(0.95);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.close-button {
  color: #aaa;
  float: right;
  font-size: 32px;
  font-weight: bold;
  position: absolute;
  top: 15px;
  right: 25px;
  cursor: pointer;
  transition: color 0.3s ease;
}

.close-button:hover,
.close-button:focus {
  color: var(--accent-red);
}

.modal-content h2 {
  color: var(--primary-blue);
  font-size: 1.8rem;
  margin-bottom: 20px;
  text-align: center;
  font-weight: 700;
}

.modal-content p {
  font-size: 1rem;
  line-height: 1.7;
  color: #555;
  margin-bottom: 15px;
  font-weight: 300;
}

.modal-content p:last-child {
  margin-bottom: 0;
}

/* API Docs Specific Styles */
.api-docs-card {
  max-width: 900px;
}

.api-docs-title {
  font-size: 2rem;
  color: var(--primary-blue);
  text-align: center;
  margin-bottom: 25px;
  font-weight: 700;
}

.api-docs-intro {
  font-size: 1.05rem;
  color: #6B7A8F;
  text-align: center;
  margin-bottom: 40px;
  line-height: 1.6;
}

.api-section {
  background-color: #F8F9FA;
  border: 1px solid #E0E6ED;
  border-radius: 12px;
  padding: 25px;
  margin-bottom: 30px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.api-section h3 {
  color: var(--dark-text);
  font-size: 1.5rem;
  margin-bottom: 15px;
  font-weight: 600;
  border-bottom: 2px solid var(--primary-blue);
  padding-bottom: 8px;
  display: inline-block;
}

.api-section h4 {
  color: var(--primary-blue);
  font-size: 1.1rem;
  margin-top: 20px;
  margin-bottom: 10px;
  font-weight: 600;
}

.api-section p {
  font-size: 0.95rem;
  color: #555;
  margin-bottom: 10px;
}

.api-section pre {
  background-color: #E9ECEF;
  border-left: 4px solid var(--primary-blue);
  padding: 15px;
  border-radius: 8px;
  overflow-x: auto;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.9rem;
  line-height: 1.4;
  color: #333;
  margin-top: 10px;
  margin-bottom: 15px;
}

.api-section code {
  color: #C22E2E;
  background-color: rgba(255, 107, 107, 0.1);
  padding: 2px 5px;
  border-radius: 4px;
}

.api-section pre code {
  background-color: transparent;
  color: #333;
}

.category-list {
  list-style-type: none;
  padding-left: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-top: 15px;
}

.category-list li {
  background-color: #E6F3FF;
  border: 1px solid #C0DFFF;
  border-radius: 8px;
  padding: 10px 15px;
  font-size: 0.9rem;
  color: var(--primary-blue);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.category-list li code {
  color: #357ABD;
  font-weight: 600;
}


@media (max-width: 768px) {
  .header-content {
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
  }

  .header-actions {
    width: 100%;
    justify-content: center;
    gap: 10px;
  }

  .logo-text h1 {
    font-size: 1.4rem;
  }

  .logo-text p {
    font-size: 0.8rem;
  }

  .header-actions .bmc-button-header img {
    height: 36px;
  }

  main {
    padding: 30px 20px;
  }

  .form-container {
    grid-template-columns: 1fr;
    grid-gap: 20px;
  }

  .card-content {
    padding: 25px;
  }

  .intro h2 {
    font-size: 1.6rem;
  }

  .important-notice {
    padding: 15px 20px;
    font-size: 0.9rem;
  }

  .result-container {
    padding: 35px 25px 25px 25px;
  }

  .result-badge {
    padding: 5px 15px;
    font-size: 0.8rem;
  }

  .action-button {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .history-container {
    padding: 25px;
  }

  .history-container h3 {
    font-size: 1.3rem;
  }

  .history-item {
    padding: 15px;
  }

  .history-category {
    font-size: 0.85rem;
  }

  .history-time {
    font-size: 0.75rem;
  }

  .history-message {
    font-size: 0.95rem;
  }

  .modal-content {
    width: 95%;
    padding: 25px;
  }

  .modal-content h2 {
    font-size: 1.6rem;
  }

  .modal-content p {
    font-size: 0.95rem;
  }

  .api-docs-title {
    font-size: 1.8rem;
  }

  .api-docs-intro {
    font-size: 1rem;
  }

  .api-section h3 {
    font-size: 1.3rem;
  }

  .api-section h4 {
    font-size: 1rem;
  }

  .api-section p,
  .api-section pre {
    font-size: 0.9rem;
  }

  .category-list {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
}

@media (max-width: 480px) {
  .app-container {
    padding: 0;
  }

  header {
    padding: 10px 0;
  }

  .header-content {
    padding: 0 15px;
  }

  .logo-icon {
    width: 45px;
    height: 45px;
    font-size: 1.2rem;
    margin-right: 10px;
  }

  .logo-text h1 {
    font-size: 1.2rem;
  }

  .logo-text p {
    display: none;
  }

  .header-actions .bmc-button-header img {
    height: 32px;
  }

  .header-actions .header-link {
    padding: 6px 10px;
    font-size: 0.85rem;
  }

  .header-actions {
    gap: 8px;
  }


  .intro h2 {
    font-size: 1.4rem;
  }

  .intro p {
    font-size: 0.95rem;
  }

  .card-content {
    padding: 20px;
  }

  .important-notice {
    padding: 12px;
    font-size: 0.85rem;
    margin-bottom: 20px;
  }

  input,
  select,
  .yox-button,
  .random-category-button {
    padding: 12px;
    font-size: 1rem;
    border-radius: 8px;
  }

  .result-container {
    padding: 30px 20px 20px 20px;
  }

  .result-badge {
    padding: 4px 12px;
    font-size: 0.75rem;
  }

  .result-text {
    font-size: 1.05rem;
  }

  .action-button {
    padding: 8px 15px;
    font-size: 0.85rem;
    gap: 6px;
  }

  .history-container {
    padding: 20px;
  }

  .history-container h3 {
    font-size: 1.2rem;
  }

  .history-item {
    padding: 12px;
  }

  .history-category {
    font-size: 0.8rem;
  }

  .history-time {
    font-size: 0.7rem;
  }

  .history-message {
    font-size: 0.9rem;
  }

  .modal-content {
    padding: 20px;
  }

  .modal-content h2 {
    font-size: 1.4rem;
  }

  .modal-content p {
    font-size: 0.9rem;
  }

  .close-button {
    font-size: 28px;
    top: 10px;
    right: 20px;
  }

  .api-docs-title {
    font-size: 1.6rem;
  }

  .api-docs-intro {
    font-size: 0.95rem;
  }

  .api-section h3 {
    font-size: 1.2rem;
  }

  .api-section h4 {
    font-size: 0.95rem;
  }

  .api-section p,
  .api-section pre {
    font-size: 0.85rem;
  }

  .category-list {
    grid-template-columns: 1fr;
  }
}