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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #333;
  background: #f4f6f9;
}

/* ========== Header ========== */
header {
  background: #1a2d4a;
  color: white;
  padding: 1.25rem 1rem 1.5rem;
  text-align: center;
}

.header-nav {
  text-align: left;
  margin-bottom: 0.75rem;
}

.back-link {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 0.875rem;
  display: inline-block;
  padding: 0.25rem 0;
  min-height: 44px;
  line-height: 44px;
  transition: color 0.2s;
}

.back-link:hover {
  color: white;
}

header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
}

.subtitle {
  font-size: 0.875rem;
  opacity: 0.82;
  margin-top: 0.4rem;
}

/* ========== Main ========== */
main {
  max-width: 800px;
  margin: 0 auto;
  padding: 1rem;
}

/* ========== Ad Unit ========== */
.ad-unit {
  margin: 1.25rem 0;
}

/* ========== Tool Section ========== */
.tool-section {
  background: white;
  border-radius: 10px;
  padding: 1.25rem;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  margin-bottom: 1.25rem;
}

.tool-section h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1a2d4a;
  margin-bottom: 0.4rem;
}

.section-desc {
  font-size: 0.875rem;
  color: #666;
  margin-bottom: 1rem;
}

/* ========== Preset Buttons ========== */
.preset-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
}

.preset-btn {
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  background: #f0f4f8;
  color: #1a2d4a;
  border: 2px solid #d0d9e4;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.preset-btn:hover {
  background: #dce7f3;
  border-color: #4a7fc1;
}

.preset-btn[aria-pressed="true"],
.preset-btn.active {
  background: #1a2d4a;
  color: white;
  border-color: #1a2d4a;
}

/* ========== Resource Table ========== */
.resource-table {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.resource-header {
  display: none;
}

.resource-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.4rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid #eef0f3;
}

.resource-row:last-child {
  border-bottom: none;
}

.resource-row--total {
  background: #f8fafc;
  border-radius: 8px;
  padding: 0.875rem 0.75rem;
  margin-top: 0.25rem;
  border-bottom: none;
}

.col-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: #1a2d4a;
  cursor: default;
}

.col-budget,
.col-actual {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.col-budget::before {
  content: "予算上限:";
  font-size: 0.8rem;
  color: #888;
  white-space: nowrap;
}

.col-actual::before {
  content: "実際のサイズ:";
  font-size: 0.8rem;
  color: #888;
  white-space: nowrap;
}

.resource-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 6px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: #f0c040;
  color: #333;
  flex-shrink: 0;
}

.resource-icon--css {
  background: #5b9bd5;
  color: white;
}

.resource-icon--img {
  background: #70c56a;
  color: white;
}

.resource-icon--font {
  background: #c06ab0;
  color: white;
}

.resource-icon--total {
  background: #e06060;
  color: white;
}

.budget-input,
.actual-input {
  width: 90px;
  padding: 0.5rem 0.6rem;
  font-size: 0.9rem;
  border: 1px solid #cdd3dc;
  border-radius: 6px;
  text-align: right;
  transition: border-color 0.15s;
  min-height: 44px;
}

.budget-input:focus,
.actual-input:focus {
  outline: none;
  border-color: #4a7fc1;
  box-shadow: 0 0 0 2px rgba(74, 127, 193, 0.2);
}

/* Spinner remove */
.budget-input::-webkit-inner-spin-button,
.actual-input::-webkit-inner-spin-button {
  opacity: 0.5;
}

.total-actual {
  font-size: 1.1rem;
  font-weight: 700;
  color: #1a2d4a;
}

.total-actual-unit {
  font-size: 0.8rem;
  color: #888;
  margin-left: 0.25rem;
}

/* ========== Gauge ========== */
.col-bar {
  padding-top: 0.25rem;
}

.gauge-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.gauge-bar {
  flex: 1;
  height: 14px;
  background: #e8ecf0;
  border-radius: 7px;
  overflow: hidden;
  position: relative;
  min-width: 60px;
}

.gauge-bar::after {
  content: "";
  display: block;
  height: 100%;
  width: var(--pct, 0%);
  border-radius: 7px;
  background: var(--gauge-color, #4caf50);
  transition: width 0.35s ease, background 0.35s ease;
}

.gauge-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: #666;
  min-width: 40px;
  text-align: right;
}

.gauge-legend {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  font-size: 0.78rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-item::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 10px;
  border-radius: 3px;
}

.legend-good::before { background: #4caf50; }
.legend-warn::before { background: #f9a825; }
.legend-over::before { background: #e53935; }

/* ========== Core Web Vitals ========== */
.cwv-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.cwv-card {
  border: 2px solid #e0e7ef;
  border-radius: 10px;
  padding: 1rem;
  transition: border-color 0.25s;
}

.cwv-card.cwv-good {
  border-color: #4caf50;
  background: #f3faf3;
}

.cwv-card.cwv-ni {
  border-color: #f9a825;
  background: #fffbf0;
}

.cwv-card.cwv-poor {
  border-color: #e53935;
  background: #fff5f5;
}

.cwv-header {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.cwv-abbr {
  font-size: 1rem;
  font-weight: 800;
  color: #1a2d4a;
}

.cwv-name {
  font-size: 0.8rem;
  color: #666;
}

.cwv-desc {
  font-size: 0.825rem;
  color: #555;
  margin-bottom: 0.75rem;
}

.cwv-slider-wrap {
  margin-bottom: 0.5rem;
}

.cwv-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: #d0d9e4;
  outline: none;
  cursor: pointer;
  margin-bottom: 0.5rem;
}

.cwv-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #1a2d4a;
  cursor: pointer;
  border: 2px solid white;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.cwv-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #1a2d4a;
  cursor: pointer;
  border: 2px solid white;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.cwv-value-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cwv-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: #1a2d4a;
}

.cwv-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  background: #4caf50;
  color: white;
  transition: background 0.25s;
}

.cwv-badge.badge-ni {
  background: #f9a825;
}

.cwv-badge.badge-poor {
  background: #e53935;
}

.cwv-thresholds {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
  font-size: 0.75rem;
}

.threshold-good { color: #2e7d32; }
.threshold-ni   { color: #e65100; }
.threshold-poor { color: #b71c1c; }

/* ========== IO Buttons ========== */
.io-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 0.75rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  text-decoration: none;
}

.btn:hover {
  opacity: 0.88;
}

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

.btn-export {
  background: #1a2d4a;
  color: white;
  flex: 1;
  min-width: 150px;
}

.btn-import {
  background: #4a7fc1;
  color: white;
  flex: 1;
  min-width: 150px;
  cursor: pointer;
}

.btn-import input[type="file"] {
  display: none;
}

.btn-reset {
  background: #f0f4f8;
  color: #555;
  border: 1px solid #cdd3dc;
  min-width: 100px;
}

.import-status {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  min-height: 1.4em;
  color: #2e7d32;
}

.import-status.error {
  color: #c62828;
}

/* ========== Howto Section ========== */
.howto-section {
  background: white;
  border-radius: 10px;
  padding: 1.5rem 1.25rem;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  margin-bottom: 1.25rem;
}

.howto-section h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1a2d4a;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.howto-section h2:first-child {
  margin-top: 0;
}

.howto-section ol {
  padding-left: 1.25rem;
  font-size: 0.925rem;
  color: #444;
}

.howto-section ol li {
  margin-bottom: 0.5rem;
}

.howto-section p {
  font-size: 0.925rem;
  color: #555;
  margin-bottom: 0.6rem;
}

/* ========== Footer ========== */
footer {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.85rem;
  color: #888;
}

footer a {
  color: #666;
  text-decoration: none;
}

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

/* ========== Responsive ========== */
@media (min-width: 560px) {
  header h1 {
    font-size: 1.5rem;
  }

  main {
    padding: 1.5rem 1.5rem;
  }

  .preset-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .resource-header {
    display: grid;
    grid-template-columns: 160px 120px 130px 1fr;
    gap: 0.5rem;
    font-size: 0.78rem;
    color: #888;
    font-weight: 600;
    padding: 0.4rem 0 0.5rem;
    border-bottom: 2px solid #eef0f3;
  }

  .resource-row {
    grid-template-columns: 160px 120px 130px 1fr;
    align-items: center;
    gap: 0.5rem;
  }

  .col-budget::before,
  .col-actual::before {
    display: none;
  }

  .cwv-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 720px) {
  main {
    padding: 1.75rem 2rem;
  }
}