/**
GOV UK inspired style guide for index.html
*/

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

:root {
  --govuk-black: #0b0c0c;
  --govuk-white: #ffffff;
  --govuk-blue: #1d70b8;
  --govuk-dark-blue: #003078;
  --govuk-green: #00703c;
  --govuk-red: #d4351c;
  --govuk-yellow: #ffdd00;
  --govuk-orange: #f47738;
  --govuk-purple: #4c2c92;
  --govuk-grey-1: #505a5f;
  --govuk-grey-2: #626a6e;
  --govuk-grey-3: #b1b4b6;
  --govuk-grey-4: #f3f2f1;
  --govuk-focus: #ffdd00;
  --govuk-focus-text: #0b0c0c;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Trebuchet MS', 'Helvetica Neue', Arial, sans-serif;
  font-weight: 400;
  line-height: 1.5;
  color: var(--govuk-black);
  background-color: var(--govuk-grey-4);
  min-height: 100vh;
}

/* Header */
.govuk-header {
  background-color: var(--govuk-black);
  padding: 20px 0;
  border-bottom: 10px solid var(--govuk-blue);
}

.govuk-header__container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.govuk-header__logotype-text {
  font-size: 24px;
  font-weight: 700;
  color: var(--govuk-white);
}

.govuk-header__service-name {
  font-size: 19px;
  color: var(--govuk-white);
  margin-top: 10px;
}

/* Phase Banner */
.govuk-phase-banner {
  padding: 10px 0;
  border-bottom: 1px solid var(--govuk-grey-3);
  background: var(--govuk-white);
}

.govuk-phase-banner__content {
  display: flex;
  align-items: center;
  gap: 10px;
}

.govuk-tag {
  display: inline-block;
  padding: 4px 8px;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--govuk-white);
  background-color: var(--govuk-blue);
}

.govuk-tag--grey {
  background-color: var(--govuk-grey-1);
  margin-right: 5px;
}

.govuk-tag--green {
  background-color: var(--govuk-green);
}

.govuk-tag--red {
  background-color: var(--govuk-red);
}

.govuk-tag--yellow {
  background-color: #ffdd00;
  color: #0b0c0c;
}

/* Container */
.govuk-width-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.govuk-main-wrapper {
  padding-top: 30px;
  padding-bottom: 30px;
}

/* Typography */
.govuk-heading-xl {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 30px;
}

.govuk-heading-l {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 25px;
}

.govuk-heading-m {
  font-size: 24px;
  font-weight: 700;
  line-height: 1..25;
  margin-bottom: 20px;
}

.govuk-heading-s {
  font-size: 19px;
  font-weight: 700;
  line-height: 1..3;
  margin-bottom: 15px;
}

.govuk-body {
  font-size: 19px;
  line-height: 1.5;
  margin-bottom: 20px;
}

.govuk-body-s {
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 15px;
}

.govuk-hint {
  font-size: 16px;
  color: var(--govuk-grey-1);
  margin-bottom: 10px;
}

.govuk-link {
  color: var(--govuk-blue);
  text-decoration: underline;
}

.govuk-link:hover {
  color: var(--govuk-dark-blue);
  text-decoration-thickness: 3px;
}

.govuk-link:focus {
  outline: 3px solid var(--govuk-focus);
  outline-offset: 0;
  background-color: var(--govuk-focus);
  color: var(--govuk-focus-text);
  text-decoration: none;
}

/* Cards */
.govuk-card {
  background: var(--govuk-white);
  padding: 30px;
  margin-bottom: 20px;
}

.govuk-card--with-border {
  border: 1px solid var(--govuk-grey-3);
}

/* Form Elements */
.govuk-form-group {
  margin-bottom: 30px;
}

.govuk-label {
  display: block;
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}

.govuk-input {
  width: 100%;
  padding: 10px;
  font-family: inherit;
  font-size: 19px;
  line-height: 1.5;
  border: 2px solid var(--govuk-black);
  border-radius: 0;
  -webkit-appearance: none;
  appearance: none;
}

.govuk-input:focus {
  outline: 3px solid var(--govuk-focus);
  outline-offset: 0;
  box-shadow: inset 0 0 0 2px var(--govuk-black);
}

.govuk-input.scanning {
  border-color: var(--govuk-orange);
  background-color: #fff7e6;
}

.input-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.input-group .govuk-input {
  flex: 1;
  min-width: 200px;
}

/* Buttons */
.govuk-button {
  display: inline-block;
  padding: 8px 20px;
  font-family: inherit;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--govuk-white);
  background-color: var(--govuk-green);
  border: 2px solid transparent;
  border-radius: 0;
  box-shadow: 0 2px 0 #002d18;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  text-decoration: none;
}

.govuk-button:hover {
  background-color: #005a30;
}

.govuk-button:focus {
  outline: 3px solid var(--govuk-focus);
  outline-offset: 0;
  background-color: var(--govuk-focus);
  color: var(--govuk-focus-text);
  box-shadow: 0 2px 0 var(--govuk-focus-text);
}

.govuk-button:active {
  transform: translateY(1px);
  box-shadow: none;
}

.govuk-button:disabled {
  background-color: var(--govuk-grey-3);
  box-shadow: none;
  cursor: not-allowed;
  opacity: 0.7;
}

.govuk-button--secondary {
  background-color: var(--govuk-grey-4);
  color: var(--govuk-black);
  box-shadow: 0 2px 0 var(--govuk-grey-1);
}

.govuk-button--secondary:hover {
  background-color: #dbdad9;
}

.govuk-button--warning {
  background-color: var(--govuk-red);
  box-shadow: 0 2px 0 #55150b;
}

.govuk-button--warning:hover {
  background-color: #aa2a16;
}

.govuk-button-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 15px;
}

/* Scanner Status */
.status-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  font-size: 16px;
  color: var(--govuk-grey-1);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--govuk-green);
}

.status-indicator.scanning .status-dot {
  background-color: var(--govuk-orange);
  animation: pulse 1s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

/* Panel (Results) */
.govuk-panel {
  padding: 30px;
  background-color: var(--govuk-green);
  color: var(--govuk-white);
  text-align: center;
}

.govuk-panel--confirmation {
  background-color: var(--govuk-green);
}

.result-dewey-number {
  font-size: 72px;
  font-weight: 700;
  font-family: 'Courier New', Courier, monospace;
  margin-bottom: 10px;
  letter-spacing: 2px;
}

.result-classification {
  font-size: 24px;
  opacity: 0.95;
}

.result-source {
  margin-top: 20px;
  font-size: 16px;
  opacity: 0.8;
}

/* Summary List */
.govuk-summary-list {
  margin: 20px 0;
  border-top: 1px solid var(--govuk-grey-3);
}

.govuk-summary-list__row {
  display: flex;
  border-bottom: 1px solid var(--govuk-grey-3);
}

.govuk-summary-list__key {
  flex: 0 0 30%;
  padding: 15px 20px 15px 0;
  font-weight: 700;
}

.govuk-summary-list__value {
  flex: 1;
  padding: 15px 0;
  word-break: break-word;
}

/* Book Details */
.book-details-list {
  margin: 20px 0;
  border-top: 1px solid var(--govuk-grey-3);
}

.book-details-list .govuk-summary-list__key {
  font-size: 19px;
  font-weight: 700;
  color: var(--govuk-black);
}

.book-details-list .govuk-summary-list__value {
  font-size: 19px;
  line-height: 1.6;
  color: var(--govuk-black);
}

.book-title {
  font-weight: 600;
}

.book-author {
  font-style: italic;
}

.book-isbn {
  font-family: 'Courier New', Courier, monospace;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.book-lcc {
  font-family: 'Courier New', Courier, monospace;
  font-weight: 600;
}

/* Source Links */
.source-link {
  display: inline-block;
  margin-right: 8px;
  margin-bottom: 8px;
  text-decoration: none;
  transition: background-color 0.15s;
}

.source-link:hover {
  background-color: var(--govuk-grey-1) !important;
  color: var(--govuk-white) !important;
}

.source-link:focus {
  outline: 3px solid var(--govuk-focus);
  outline-offset: 2px;
}

/* Warning and Error */
.govuk-warning-text {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding: 20px;
  background: #fff7e6;
  border-left: 5px solid var(--govuk-orange);
  margin-bottom: 20px;
}

.govuk-warning-text__icon {
  font-size: 24px;
  font-weight: 700;
  color: var(--govuk-orange);
  flex-shrink: 0;
}

.govuk-error-summary {
  padding: 20px;
  border: 5px solid var(--govuk-red);
  background: var(--govuk-white);
  margin-bottom: 30px;
}

.govuk-error-summary__title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--govuk-red);
}

/* Sources List */
.sources-list {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--govuk-grey-3);
}

.sources-label {
  font-size: 14px;
  color: var(--govuk-grey-1);
}

/* Loading Spinner */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 40px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--govuk-grey-3);
  border-top-color: var(--govuk-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  font-size: 19px;
}

/* History Section */
.history-section {
  margin-top: 40px;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 20px;
}

.history-header .govuk-heading-m {
  margin-bottom: 0;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  border-bottom: 1px solid var(--govuk-grey-3);
  cursor: pointer;
  background: var(--govuk-white);
  transition: background 0.15s;
}

.history-item:hover {
  background: var(--govuk-grey-4);
}

.history-item:focus {
  outline: 3px solid var(--govuk-focus);
  outline-offset: -3px;
}

.history-isbn {
  font-family: 'Courier New', Courier, monospace;
  font-size: 16px;
  font-weight: 700;
}

.history-title {
  font-size: 14px;
  color: var(--govuk-grey-1);
  margin-left: 10px;
}

.history-dewey {
  font-family: 'Courier New', Courier, monospace;
  font-size: 16px;
  font-weight: 700;
  padding: 4px 8px;
  background: var(--govuk-blue);
  color: var(--govuk-white);
  flex-shrink: 0;
}

.history-dewey.none {
  background: var(--govuk-grey-1);
}

.empty-history {
  color: var(--govuk-grey-1);
  font-style: italic;
  padding: 20px;
  text-align: center;
}

/* Export Section */
.export-section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--govuk-grey-3);
}

.export-section .govuk-heading-s {
  margin-bottom: 10px;
}

/* Settings Panel */
.settings-section {
  margin-top: 40px;
}

.settings-toggle {
  margin-bottom: 15px;
}

.settings-panel {
  display: none;
  background: var(--govuk-white);
  border: 1px solid var(--govuk-grey-3);
  padding: 30px;
  margin-top: 15px;
}

.api-setting-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--govuk-grey-3);
}

.api-setting-item:last-child {
  border-bottom: none;
}

.api-setting-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}

.api-setting-header .govuk-label {
  margin-bottom: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.api-enabled-checkbox {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

.api-status {
  font-size: 14px;
  padding: 4px 10px;
  border-radius: 3px;
  font-weight: 600;
}

.api-status.connected {
  background: #cce5d8;
  color: var(--govuk-green);
}

.api-status.disconnected {
  background: #f6d7d2;
  color: var(--govuk-red);
}

.api-status.disabled {
  background: #e8e8e8;
  color: #505a5f;
}

.api-key-input {
  margin-top: 15px;
  padding-left: 30px;
}

.api-key-input .govuk-input {
  max-width: 400px;
  font-size: 16px;
}

.api-key-input .govuk-label {
  font-size: 16px;
  font-weight: 600;
}

/* Details/Summary */
.details {
  margin-top: 20px;
}

.details .summary {
  color: var(--govuk-blue);
  cursor: pointer;
  font-size: 16px;
}

.details .summary:hover {
  color: var(--govuk-dark-blue);
  text-decoration: underline;
}

.details .summary:focus {
  outline: 3px solid var(--govuk-focus);
  background: var(--govuk-focus);
  color: var(--govuk-focus-text);
}

.details[open] .summary {
  margin-bottom: 15px;
}


/* Responsive adjustments */
@media (max-width: 640px) {
  .govuk-heading-xl {
    font-size: 32px;
  }

  .govuk-heading-l {
    font-size: 27px;
  }

  .govuk-heading-m {
    font-size: 22px;
  }

  .result-dewey-number {
    font-size: 48px;
  }

  .result-classification {
    font-size: 18px;
  }

  .govuk-summary-list__row {
    flex-direction: column;
  }

  .govuk-summary-list__key {
    flex: none;
    padding-bottom: 5px;
  }

  .govuk-summary-list__value {
    padding-top: 0;
  }

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

  .input-group .govuk-button {
    width: 100%;
  }

  .history-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .history-dewey {
    align-self: flex-start;
  }

  .api-setting-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .api-key-input {
    padding-left: 0;
  }

  .history-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .govuk-button-group {
    flex-direction: column;
  }

  .govuk-button-group .govuk-button {
    width: 100%;
  }

}

@media (max-width: 400px) {
  .govuk-card {
    padding: 20px;
  }

  .result-dewey-number {
    font-size: 36px;
  }

  .govuk-panel {
    padding: 20px;
  }
}

.subjects-dropdown {
    margin-top: 15px;
    border-left: none;
}

.subjects-dropdown .subjects-toggle {
    color: #1d70b8;
    cursor: pointer;
    font-family: "GDS Transport", arial, sans-serif;
    font-size: 16px;
    font-size: 1rem;
    line-height: 1.25;
    font-weight: 400;
    text-decoration: underline;
    text-decoration-thickness: max(1px, .0625rem);
    text-underline-offset: 0.1578em;
}

@media (min-width: 40.0625em) {
    .subjects-dropdown .subjects-toggle {
        font-size: 19px;
        font-size: 1.1875rem;
        line-height: 1.3157894737;
    }
}

.subjects-dropdown .subjects-toggle:hover {
    text-decoration-thickness: max(3px, .1875rem, .12em);
    -webkit-text-decoration-skip-ink: none;
    text-decoration-skip-ink: none;
}

.subjects-dropdown .subjects-toggle:focus {
    outline: 3px solid transparent;
    color: #0b0c0c;
    background-color: #ffdd00;
    box-shadow: 0 -2px #ffdd00, 0 4px #0b0c0c;
    text-decoration: none;
    -webkit-box-decoration-break: clone;
    box-decoration-break: clone;
}

.subjects-dropdown summary::-webkit-details-marker {
    display: none;
}

.subjects-dropdown summary {
    list-style: none;
    display: inline-block;
}

.subjects-dropdown summary::before {
    content: "";
    display: inline-block;
    width: 0;
    height: 0;
    border-style: solid;
    border-color: transparent;
    clip-path: polygon(0% 0%, 100% 50%, 0% 100%);
    border-width: 7px 0 7px 10px;
    border-left-color: #1d70b8;
    margin-right: 10px;
    vertical-align: middle;
}

.subjects-dropdown[open] summary::before {
    clip-path: polygon(0% 0%, 100% 0%, 50% 100%);
    border-width: 10px 7px 0 7px;
    border-left-color: transparent;
    border-top-color: #1d70b8;
}

.subjects-dropdown .govuk-list {
    margin-top: 15px;
    margin-bottom: 0;
}

.subjects-dropdown .govuk-list li {
    margin-bottom: 5px;
}