/* Every reusable component is scoped to oppo-*; layout belongs to its consumer. */
.oppo-ui { color: var(--oppo-text); font-family: var(--oppo-font); font-size: var(--oppo-text-md); line-height: 1.5; }
.oppo-ui *, .oppo-ui *::before, .oppo-ui *::after { box-sizing: border-box; }
.oppo-ui button, .oppo-ui input, .oppo-ui select, .oppo-ui textarea { font: inherit; }
.oppo-ui button, .oppo-ui a, .oppo-ui input, .oppo-ui select, .oppo-ui summary, .oppo-ui textarea { -webkit-tap-highlight-color: transparent; }
.oppo-ui :focus-visible { outline: 2px solid var(--oppo-green-dark); outline-offset: 3px; box-shadow: var(--oppo-focus); }
.oppo-ui [hidden] { display: none !important; }
.oppo-icon { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex: 0 0 auto; }
.oppo-button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: var(--oppo-control-md); border: 1px solid transparent; border-radius: var(--oppo-radius-pill); padding: 10px 24px; background: var(--oppo-ink); color: var(--oppo-white); font-weight: 500; font-size: var(--oppo-text-sm); line-height: 1.3; text-decoration: none; cursor: pointer; transition: background var(--oppo-motion), transform var(--oppo-motion), border-color var(--oppo-motion); }
.oppo-button:hover:not(:disabled) { background: #303030; }
.oppo-button:active:not(:disabled) { transform: translateY(1px); }
.oppo-button--green { background: var(--oppo-green); color: var(--oppo-ink); }
.oppo-button--green:hover:not(:disabled) { background: #20ed65; }
.oppo-button--secondary { border-color: var(--oppo-border); color: var(--oppo-ink); background: transparent; }
.oppo-button--secondary:hover:not(:disabled) { background: var(--oppo-gray-100); border-color: var(--oppo-ink); }
.oppo-button--quiet { color: var(--oppo-text); background: transparent; }
.oppo-button--quiet:hover:not(:disabled) { background: var(--oppo-gray-100); }
.oppo-button--danger { background: var(--oppo-danger); }
.oppo-button--danger:hover:not(:disabled) { background: #9d2724; }
.oppo-button--sm { min-height: var(--oppo-control-sm); padding: 8px 20px; }
.oppo-button--lg { min-height: var(--oppo-control-lg); padding: 14px 30px; font-size: var(--oppo-text-md); }
.oppo-button:disabled, .oppo-icon-button:disabled { background: var(--oppo-gray-200); color: #777; border-color: transparent; cursor: not-allowed; }
.oppo-button[aria-busy="true"] { cursor: progress; }
.oppo-spinner { width: 16px; height: 16px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: oppo-spin 750ms linear infinite; }
@keyframes oppo-spin { to { transform: rotate(360deg); } }
.oppo-icon-button { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border: 1px solid var(--oppo-border); border-radius: 50%; background: var(--oppo-surface); color: var(--oppo-text); cursor: pointer; transition: background var(--oppo-motion); }
.oppo-icon-button:hover:not(:disabled), .oppo-icon-button[aria-pressed="true"] { background: var(--oppo-gray-100); }
.oppo-icon-button[aria-pressed="true"] .oppo-icon { fill: var(--oppo-text); }
.oppo-link { color: var(--oppo-text); display: inline-flex; align-items: center; gap: 8px; text-decoration: none; font-size: var(--oppo-text-sm); font-weight: 500; border-radius: 4px; }
.oppo-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.oppo-badge { display: inline-flex; align-items: center; gap: 6px; border-radius: var(--oppo-radius-pill); padding: 5px 10px; background: var(--oppo-gray-100); color: var(--oppo-text); font-size: var(--oppo-text-xs); line-height: 1.4; font-weight: 500; }
.oppo-badge--green { background: var(--oppo-green); }
.oppo-badge--success { background: var(--oppo-success-soft); color: var(--oppo-green-dark); }
.oppo-badge--warning { background: var(--oppo-warning-soft); color: var(--oppo-warning); }
.oppo-badge--danger { background: var(--oppo-danger-soft); color: var(--oppo-danger); }
.oppo-field { display: grid; gap: 8px; min-width: 0; }
.oppo-field__label { font-size: var(--oppo-text-sm); font-weight: 500; }
.oppo-input { width: 100%; min-height: var(--oppo-control-lg); padding: 14px 16px; border: 1px solid var(--oppo-border); border-radius: var(--oppo-radius-sm); background: var(--oppo-surface); color: var(--oppo-text); transition: border-color var(--oppo-motion); }
.oppo-input::placeholder { color: var(--oppo-muted); opacity: 1; }
.oppo-input:hover:not(:disabled) { border-color: #999; }
.oppo-input:focus-visible { border-color: var(--oppo-ink); }
.oppo-input[aria-invalid="true"] { border-color: var(--oppo-danger); }
.oppo-input:disabled { background: var(--oppo-gray-100); color: var(--oppo-muted); cursor: not-allowed; }
textarea.oppo-input { resize: vertical; min-height: 120px; }
.oppo-field__hint { margin: 0; font-size: var(--oppo-text-xs); color: var(--oppo-muted); }
.oppo-field__error { margin: 0; font-size: var(--oppo-text-xs); color: var(--oppo-danger); }
.oppo-check { display: inline-flex; align-items: flex-start; gap: 10px; font-size: var(--oppo-text-sm); cursor: pointer; padding-block: 6px; }
.oppo-check input { appearance: none; width: 20px; height: 20px; border: 1px solid #999; border-radius: 4px; background: white; margin: 1px 0 0; flex: 0 0 auto; cursor: inherit; }
.oppo-check input:checked { border-color: var(--oppo-ink); background: var(--oppo-ink); }
.oppo-check input[type="checkbox"]:checked { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='m5 10 3 3 7-7' fill='none' stroke='white' stroke-width='2'/%3E%3C/svg%3E"); }
.oppo-check input[type="radio"] { border-radius: 50%; }
.oppo-check input[type="radio"]:checked { box-shadow: inset 0 0 0 4px white; background: var(--oppo-ink); }
.oppo-check:has(input:disabled) { color: var(--oppo-muted); cursor: not-allowed; }
.oppo-check input:disabled { border-color: var(--oppo-border); background: var(--oppo-gray-100); }
.oppo-switch { display: inline-flex; align-items: center; gap: 12px; padding-block: 6px; font-size: var(--oppo-text-sm); cursor: pointer; }
.oppo-switch input { appearance: none; margin: 0; width: 44px; height: 26px; flex-shrink: 0; background: #999; border: 0; border-radius: 20px; cursor: inherit; position: relative; transition: background var(--oppo-motion); }
.oppo-switch input::before { content: ""; position: absolute; width: 20px; height: 20px; top: 3px; left: 3px; background: var(--oppo-white); border-radius: 50%; transition: transform var(--oppo-motion); }
.oppo-switch input:checked { background: var(--oppo-green-dark); }
.oppo-switch input:checked::before { transform: translateX(18px); }
.oppo-switch:has(input:disabled) { color: var(--oppo-muted); cursor: not-allowed; }
.oppo-switch input:disabled { opacity: .45; }
.oppo-tabs { display: flex; gap: 28px; border-bottom: 1px solid var(--oppo-gray-200); overflow-x: auto; padding: 5px; margin: -5px; }
.oppo-tab { white-space: nowrap; border: 0; border-bottom: 2px solid transparent; background: none; padding: 12px 0; color: var(--oppo-muted); cursor: pointer; font-size: var(--oppo-text-sm); }
.oppo-tab[aria-selected="true"] { color: var(--oppo-text); border-bottom-color: var(--oppo-ink); font-weight: 500; }
.oppo-chip { border: 1px solid var(--oppo-border); background: var(--oppo-surface); color: var(--oppo-muted); min-height: 40px; border-radius: var(--oppo-radius-pill); padding: 8px 16px; font-size: var(--oppo-text-sm); cursor: pointer; }
.oppo-chip[aria-pressed="true"] { border-color: var(--oppo-ink); background: var(--oppo-ink); color: var(--oppo-white); }
.oppo-alert { display: flex; align-items: flex-start; gap: 12px; border-radius: var(--oppo-radius-sm); background: var(--oppo-gray-100); color: var(--oppo-text); padding: 16px; font-size: var(--oppo-text-sm); }
.oppo-alert p { margin: 0; }
.oppo-alert--success { background: var(--oppo-success-soft); color: var(--oppo-green-dark); }
.oppo-alert--danger { background: var(--oppo-danger-soft); color: var(--oppo-danger); }
.oppo-alert--warning { background: var(--oppo-warning-soft); color: var(--oppo-warning); }
.oppo-quantity { display: inline-flex; align-items: center; gap: 2px; border: 1px solid var(--oppo-border); border-radius: var(--oppo-radius-pill); padding: 3px; }
.oppo-quantity button { border: none; background: transparent; width: 36px; height: 36px; border-radius: 50%; cursor: pointer; }
.oppo-quantity button:hover:not(:disabled) { background: var(--oppo-gray-100); }
.oppo-quantity button:disabled { color: #999; cursor: not-allowed; }
.oppo-quantity input { appearance: textfield; width: 36px; padding: 0; text-align: center; border: 0; background: transparent; color: var(--oppo-text); border-radius: 4px; font-size: var(--oppo-text-sm); }
.oppo-quantity input::-webkit-inner-spin-button, .oppo-quantity input::-webkit-outer-spin-button { appearance: none; }
.oppo-product { position: relative; background: var(--oppo-gray-100); border-radius: var(--oppo-radius-lg); padding: 24px; display: flex; flex-direction: column; min-width: 0; }
.oppo-product__top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.oppo-product__favorite { border: 0; background: transparent; }
.oppo-product__image { display: block; width: 100%; height: 232px; object-fit: contain; margin-block: 8px 20px; transition: transform 300ms ease; }
.oppo-product:hover .oppo-product__image { transform: translateY(-5px); }
.oppo-product h3 { margin: 0 0 8px; font-weight: 500; font-size: var(--oppo-title-sm); letter-spacing: -.03em; line-height: 1.2; }
.oppo-product__description { margin: 0; color: var(--oppo-muted); font-size: var(--oppo-text-sm); }
.oppo-product__bottom { margin-top: auto; padding-top: 24px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.oppo-price { font-weight: 500; font-size: var(--oppo-text-lg); white-space: nowrap; line-height: 1.25; }
.oppo-price del { display: block; font-size: var(--oppo-text-xs); color: var(--oppo-muted); font-weight: 400; margin-top: 4px; }
.oppo-colors { display: flex; gap: 8px; margin: 16px 0; }
.oppo-color { --swatch-color: #ddd; width: 28px; height: 28px; background: var(--swatch-color); border: 3px solid var(--oppo-surface); border-radius: 50%; box-shadow: 0 0 0 1px var(--oppo-border); cursor: pointer; }
.oppo-color[aria-pressed="true"] { box-shadow: 0 0 0 1px var(--oppo-text); }
.oppo-accordion { border-bottom: 1px solid var(--oppo-gray-200); }
.oppo-accordion summary { display: flex; justify-content: space-between; align-items: center; gap: 24px; list-style: none; padding: 20px 0; border-radius: 4px; cursor: pointer; font-size: var(--oppo-text-md); font-weight: 500; }
.oppo-accordion summary::-webkit-details-marker { display: none; }
.oppo-accordion summary::after { content: "+"; font-size: 24px; font-weight: 400; }
.oppo-accordion[open] summary::after { content: "−"; }
.oppo-accordion__content { padding: 0 32px 24px 0; color: var(--oppo-muted); font-size: var(--oppo-text-sm); }
.oppo-dialog { width: min(480px, calc(100% - 32px)); max-height: calc(100dvh - 48px); padding: 32px; border: 0; border-radius: var(--oppo-radius-lg); background: var(--oppo-surface); color: var(--oppo-text); box-shadow: var(--oppo-shadow); overflow: auto; }
.oppo-dialog::backdrop { background: rgb(0 0 0 / 40%); backdrop-filter: blur(4px); }
.oppo-dialog__header { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; margin-bottom: 24px; }
.oppo-dialog h2 { font-size: var(--oppo-title-sm); font-weight: 500; margin: 0 0 8px; letter-spacing: -.03em; line-height: 1.2; }
.oppo-dialog p { font-size: var(--oppo-text-sm); margin: 0; color: var(--oppo-muted); }
.oppo-toast-region { position: fixed; right: 24px; bottom: 24px; z-index: 20; max-width: min(400px, calc(100vw - 32px)); display: grid; gap: 12px; }
.oppo-toast { display: flex; align-items: center; gap: 12px; background: var(--oppo-ink); color: var(--oppo-white); border-radius: var(--oppo-radius-md); box-shadow: var(--oppo-shadow); padding: 16px 20px; font-size: var(--oppo-text-sm); }
.oppo-toast button { margin-left: auto; background: transparent; color: inherit; border: 0; min-width: 32px; min-height: 32px; cursor: pointer; border-radius: 50%; }
.oppo-empty { text-align: center; padding: 48px 24px; }
.oppo-empty__icon { width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 50%; display: grid; place-items: center; background: var(--oppo-gray-100); }
.oppo-empty__icon .oppo-icon { width: 28px; height: 28px; }
.oppo-empty h3 { margin: 0 0 8px; font-size: var(--oppo-title-sm); font-weight: 500; }
.oppo-empty p { margin: 0 0 24px; color: var(--oppo-muted); font-size: var(--oppo-text-sm); }
.oppo-skeleton { height: 16px; border-radius: 4px; background: linear-gradient(90deg, #ebebeb 25%, #f7f7f7 50%, #ebebeb 75%); background-size: 200% 100%; animation: oppo-skeleton 1.5s linear infinite; }
@keyframes oppo-skeleton { to { background-position: -200% 0; } }
@media (prefers-reduced-motion: reduce) {
  .oppo-ui *, .oppo-ui *::before, .oppo-ui *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .oppo-product:hover .oppo-product__image { transform: none; }
}
@media (forced-colors: active) {
  .oppo-check input, .oppo-switch input { appearance: auto; }
  .oppo-switch input::before { display: none; }
  .oppo-ui :focus-visible { outline: 2px solid Highlight; }
  .oppo-chip[aria-pressed="true"], .oppo-tab[aria-selected="true"], .oppo-color[aria-pressed="true"] { outline: 2px solid Highlight; }
}