/* ========================================
   Design System
   ======================================== */
:root {
  --white: #ffffff;
  --gray-50: #f8f9fa;
  --gray-100: #f1f3f5;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #868e96;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;

  --accent: #4263eb;
  --accent-light: #5c7cfa;
  --accent-bg: #edf2ff;
  --accent-border: #bac8ff;
  --pink: #e64980;
  --pink-bg: #fff0f6;
  --green: #2b8a3e;
  --green-bg: #ebfbee;

  --font: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --transition: 0.2s ease;
}

/* Reset */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--gray-50);
  color: var(--gray-800);
  min-height: 100vh;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ========================================
   Header
   ======================================== */
.header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 840px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  text-decoration: none;
  color: var(--gray-900);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* Header nav buttons */
.header-nav {
  display: flex;
  gap: 6px;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  background: transparent;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  color: var(--gray-600);
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
}

.nav-btn:hover {
  background: var(--gray-50);
  border-color: var(--gray-300);
  color: var(--gray-800);
}

.nav-btn svg {
  flex-shrink: 0;
}

.nav-btn-label {
  display: inline;
}

.nav-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  background: var(--gray-100);
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-600);
  padding: 0 5px;
}

/* ========================================
   Side Panel
   ======================================== */
.side-panel {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  justify-content: flex-end;
}

.panel-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.2);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.side-panel.open .panel-overlay {
  opacity: 1;
}

.panel-content {
  position: relative;
  width: 340px;
  max-width: 90vw;
  background: var(--white);
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.08);
  transform: translateX(100%);
  transition: transform 0.25s ease;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.side-panel.open .panel-content {
  transform: translateX(0);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--gray-200);
}

.panel-title {
  font-size: 16px;
  font-weight: 600;
}

.panel-close {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  font-size: 22px;
  color: var(--gray-500);
  cursor: pointer;
  border-radius: 6px;
}

.panel-close:hover {
  background: var(--gray-100);
}

.panel-body {
  padding: 12px 20px;
  flex: 1;
}

.panel-empty {
  text-align: center;
  padding: 30px 0;
  color: var(--gray-500);
  font-size: 14px;
}

.panel-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-bottom: 1px solid var(--gray-100);
}

.panel-item-name {
  font-size: 14px;
  color: var(--gray-800);
}

.panel-item-del {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  font-size: 18px;
  color: var(--gray-400);
  cursor: pointer;
  border-radius: 4px;
}

.panel-item-del:hover {
  background: #fff5f5;
  color: #e03131;
}

/* ========================================
   Main
   ======================================== */
.main {
  max-width: 840px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   Hero
   ======================================== */
.hero {
  padding: 48px 0 36px;
  text-align: center;
}

.hero-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.5px;
  margin-bottom: 10px;
}

.hero-sub {
  font-size: 15px;
  color: var(--gray-600);
  margin-bottom: 32px;
}

.search-form {
  margin-bottom: 20px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--white);
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 4px 4px 4px 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}

.search-box-icon {
  color: var(--gray-400);
  flex-shrink: 0;
  margin-right: 10px;
  transition: var(--transition);
}

.search-box:focus-within .search-box-icon {
  color: var(--accent);
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 15px;
  font-family: var(--font);
  color: var(--gray-800);
  padding: 10px 0;
  background: transparent;
  min-width: 0;
}

.search-input::placeholder {
  color: var(--gray-400);
}

.search-btn {
  flex-shrink: 0;
  padding: 10px 24px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
}

.search-btn:hover {
  background: var(--accent-light);
}

.search-btn:active {
  transform: scale(0.97);
}

.search-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Tags */
.tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.tag {
  padding: 6px 14px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  color: var(--gray-600);
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
}

.tag:hover {
  background: var(--accent-bg);
  border-color: var(--accent-border);
  color: var(--accent);
}

/* ========================================
   Loading
   ======================================== */
.loading {
  text-align: center;
  padding: 60px 0;
}

.loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 20px;
  animation: spin 0.8s linear infinite;
}

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

.loading-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 4px;
}

.loading-detail {
  font-size: 13px;
  color: var(--gray-500);
}

/* ========================================
   Filter bar
   ======================================== */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 6px 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  color: var(--gray-600);
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  border-color: var(--accent-border);
  color: var(--accent);
}

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.filter-check {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-left: auto;
  font-size: 13px;
  color: var(--gray-600);
  cursor: pointer;
  user-select: none;
}

.filter-check input[type="checkbox"] {
  accent-color: var(--accent);
  width: 15px;
  height: 15px;
  cursor: pointer;
}

/* ========================================
   Results
   ======================================== */
.results-section {
  padding-bottom: 80px;
}

.results-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.results-query {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-800);
}

.results-clear {
  padding: 6px 16px;
  background: transparent;
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  color: var(--gray-600);
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
}

.results-clear:hover {
  border-color: #e03131;
  color: #e03131;
  background: #fff5f5;
}

.results-body {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  animation: fadeUp 0.35s ease;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

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

/* Markdown styles */
.results-body h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gray-200);
}

.results-body h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--gray-900);
  margin: 28px 0 12px;
  padding: 12px 16px;
  background: var(--gray-50);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.results-body h2:first-child {
  margin-top: 0;
}

.results-body h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-700);
  margin: 14px 0 8px;
}

.results-body p {
  color: var(--gray-700);
  margin-bottom: 8px;
  line-height: 1.8;
  font-size: 14px;
}

.results-body ul,
.results-body ol {
  margin: 6px 0 14px;
  padding-left: 20px;
}

.results-body li {
  color: var(--gray-700);
  margin-bottom: 5px;
  line-height: 1.7;
  font-size: 14px;
}

.results-body li strong,
.results-body p strong {
  color: var(--gray-900);
  font-weight: 600;
}

.results-body em {
  color: var(--accent);
  font-style: normal;
  font-weight: 500;
}

.results-body hr {
  border: none;
  height: 1px;
  background: var(--gray-200);
  margin: 24px 0;
}

.results-body a {
  color: var(--accent);
  text-decoration: none;
}

.results-body a:hover {
  text-decoration: underline;
}

/* ========================================
   Work section & card
   ======================================== */
.work-section {
  margin-bottom: 4px;
}

.work-card {
  display: flex;
  gap: 18px;
  animation: fadeUp 0.4s ease;
}

.work-cover-wrap {
  flex-shrink: 0;
  width: 110px;
}

.work-cover-placeholder {
  width: 110px;
  height: 156px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
}

.work-cover-noimage {
  width: 110px;
  height: 156px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-400);
  letter-spacing: 0.5px;
}

.work-cover {
  width: 110px;
  height: 156px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  background: var(--gray-100);
}

.work-detail {
  flex: 1;
  min-width: 0;
}

.work-detail ul {
  margin-top: 0;
}

.work-detail li:first-child {
  margin-top: 0;
}

/* Action buttons */
.work-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  padding-top: 8px;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  font-size: 12px;
  font-family: var(--font);
  color: var(--gray-600);
  cursor: pointer;
  transition: var(--transition);
}

.action-btn:hover {
  border-color: var(--gray-300);
  background: var(--gray-50);
}

.action-btn svg {
  flex-shrink: 0;
}

.fav-btn.active {
  color: var(--pink);
  border-color: var(--pink);
  background: var(--pink-bg);
}

.read-btn.active {
  color: var(--green);
  border-color: var(--green);
  background: var(--green-bg);
}

/* Streaming cursor */
.streaming-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  margin-left: 2px;
  animation: blink 0.7s steps(2) infinite;
  vertical-align: text-bottom;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* ========================================
   Error
   ======================================== */
.error-box {
  text-align: center;
  padding: 40px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
}

.error-msg {
  font-size: 15px;
  color: var(--gray-600);
  margin-bottom: 16px;
}

.error-retry {
  padding: 8px 22px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
}

.error-retry:hover {
  background: var(--accent-light);
}

/* ========================================
   Work Actions
   ======================================== */
.work-actions {
  display: flex;
  gap: 8px;
  padding: 8px 0 4px;
  flex-wrap: wrap;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font);
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  background: var(--white);
  color: var(--gray-600);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.action-btn:hover {
  border-color: var(--gray-300);
  background: var(--gray-50);
}

.fav-btn.active {
  color: #e64980;
  border-color: #e64980;
  background: #fff0f6;
}

.amazon-btn {
  color: #ff9900;
  border-color: #ff9900;
}

.amazon-btn:hover {
  background: #fff8ef;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  padding: 12px 24px;
  border-top: 1px solid var(--gray-200);
  font-size: 12px;
  color: var(--gray-500);
  background: var(--white);
  z-index: 50;
}

.footer-disclaimer {
  margin-top: 4px;
  font-size: 10px;
  color: var(--gray-400);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
  .main {
    padding: 0 16px;
  }

  .header-inner {
    padding: 12px 16px;
  }

  .hero {
    padding: 36px 0 28px;
  }

  .hero-title {
    font-size: 26px;
  }

  .hero-sub {
    font-size: 14px;
    margin-bottom: 24px;
  }

  .results-body {
    padding: 24px 20px;
  }

  .panel-content {
    width: 300px;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 22px;
  }

  .hero {
    padding: 32px 0 20px;
  }

  .hero-sub {
    font-size: 13px;
    margin-bottom: 20px;
  }

  .search-box {
    flex-direction: column;
    padding: 4px;
  }

  .search-box-icon {
    display: none;
  }

  .search-input {
    width: 100%;
    padding: 12px 14px;
    text-align: center;
  }

  .search-btn {
    width: 100%;
    padding: 12px;
    border-radius: 7px;
  }

  .results-body {
    padding: 16px 14px;
  }

  .results-body h2 {
    font-size: 15px;
    padding: 10px 14px;
  }

  .nav-btn-label {
    display: none;
  }

  .work-card {
    flex-direction: column;
    gap: 12px;
  }

  .work-cover-wrap {
    width: 90px;
  }

  .work-cover-placeholder,
  .work-cover,
  .work-cover-noimage {
    width: 90px;
    height: 128px;
  }

  .filter-bar {
    gap: 4px;
  }

  .filter-btn {
    padding: 5px 12px;
    font-size: 12px;
  }

  .tags {
    gap: 6px;
  }

  .tag {
    padding: 5px 10px;
    font-size: 12px;
  }

  .panel-content {
    width: 280px;
  }
}