/* ==========================================================================
   Gadget Finder — Shared Frontend Styles (Redesigned)
   =========================================================================
   Modern, unified CSS for Battery Finder & Charger Finder.
   Uses :is() selector grouping for bf-/cf- prefix shared styles.
   CSS-only redesign — no HTML/JS changes required.
   @since 6.0.0
   ========================================================================== */

/* --------------------------------------------------------------------------
   § 1. Design Tokens
   -------------------------------------------------------------------------- */
:root {
    --gf-max-width: 1000px;
    --gf-breakpoint-md: 800px;
    --gf-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Colors — mg-tokens からの派生 */
    --gf-primary: var(--mg-color-primary-hover);
    --gf-primary-light: var(--mg-color-primary);
    --gf-primary-dark: var(--mg-blue-700);
    --gf-primary-50: var(--mg-blue-50);
    --gf-primary-100: var(--mg-gray-100);

    --gf-gray-50: var(--mg-gray-50);
    --gf-gray-100: var(--mg-gray-100);
    --gf-gray-200: var(--mg-gray-200);
    --gf-gray-300: var(--mg-gray-300);
    --gf-gray-400: var(--mg-gray-400);
    --gf-gray-500: var(--mg-gray-500);
    --gf-gray-600: var(--mg-gray-600);
    --gf-gray-700: var(--mg-gray-700);
    --gf-gray-900: var(--mg-gray-900);

    --gf-white: var(--mg-white);
    --gf-error: var(--mg-red-400);
    --gf-warning: var(--mg-yellow-400);
    --gf-success: var(--mg-green-400);

    /* Rank colors */
    --gf-gold: linear-gradient(135deg, var(--mg-yellow-400), var(--mg-yellow-400));
    --gf-gold-text: #3d2800;
    --gf-silver: linear-gradient(135deg, var(--mg-gray-300), var(--mg-gray-400));
    --gf-bronze: linear-gradient(135deg, var(--mg-color-warning-border), var(--mg-yellow-500));

    /* EC Brand colors — ブランドカラーは固定値 */
    --gf-brand-amazon: #F99D31;
    --gf-brand-rakuten: #d0322e; /* 楽天赤。白文字の購入ボタンで #E0423F は 4.18 と AA(4.5)僅か未達のため微暗化(白上 ~5.0、依然 Rakuten 赤) */
    --gf-brand-yahoo: #66A8FF;
    --gf-brand-detail: #00a8e1;

    /* Shadows */
    --gf-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --gf-shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
    --gf-shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.1);
    --gf-shadow-btn: 0 4px 14px rgba(37, 99, 235, 0.25);

    /* Layout */
    --gf-radius-sm: 6px;
    --gf-radius-md: 10px;
    --gf-radius-lg: 16px;
    --gf-radius-full: 50rem;
    --gf-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}


/* --------------------------------------------------------------------------
   § 2. Filter Container
   -------------------------------------------------------------------------- */
:is(#bf-filter-container, #cf-filter-container).final-design {
    background: var(--gf-white);
    border-radius: var(--gf-radius-lg);
    padding: 1.75rem;
    box-shadow: var(--gf-shadow-lg);
    margin-bottom: 2.5rem;
    max-width: var(--gf-max-width);
    margin-left: auto;
    margin-right: auto;
    border: 1px solid var(--gf-gray-100);
}

@media (min-width: 768px) {
    :is(#bf-filter-container, #cf-filter-container).final-design {
        padding: 2.5rem 3rem;
    }
}


/* --------------------------------------------------------------------------
   § 3. Filter Header
   -------------------------------------------------------------------------- */
.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.filter-title {
    text-align: center;
    font-size: clamp(1.4rem, 3.5vw, 1.75rem);
    margin: 0;
    color: var(--gf-gray-900);
    flex-grow: 1;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.filter-stats {
    font-size: 0.8rem;
    color: var(--gf-gray-500);
    background: var(--gf-gray-50);
    padding: 0.35em 0.9em;
    border-radius: var(--gf-radius-full);
    white-space: nowrap;
    border: 1px solid var(--gf-gray-200);
    font-weight: 500;
}

:is(.bf-filter-reset, .cf-filter-reset) {
    background: transparent;
    border: 1px solid var(--gf-gray-300);
    color: var(--gf-gray-500);
    padding: 0.4em 1em;
    border-radius: var(--gf-radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--gf-transition);
    white-space: nowrap;
}

:is(.bf-filter-reset, .cf-filter-reset):hover {
    background: var(--gf-gray-600);
    color: var(--gf-white);
    border-color: var(--gf-gray-600);
}

@media (max-width: 782px) {
    .filter-title {
        width: 100%;
        margin-bottom: 0.25rem;
    }

    .filter-stats {
        flex-grow: 1;
        text-align: center;
    }
}


/* --------------------------------------------------------------------------
   § 4. Filter Sections & Preset Buttons
   -------------------------------------------------------------------------- */
.filter-section {
    border-top: 1px solid var(--gf-gray-100);
    padding-top: 1.5rem;
    margin-top: 1.5rem;
}

.filter-section:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

.filter-section .filter-section-title {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--gf-primary);
    margin-top: 0;
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding-left: 0.75rem;
    border-left: 3px solid var(--gf-primary);
}

/* Higher specificity for theme override */
:is(#bf-filter-container, #cf-filter-container) .filter-section-title {
    color: var(--gf-primary);
    border-left: 3px solid var(--gf-primary);
    padding-left: 0.75rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.preset-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.preset-btn {
    padding: 0.75em 0.5em;
    border: 1.5px solid var(--gf-gray-200);
    background: var(--gf-white);
    border-radius: var(--gf-radius-md);
    cursor: pointer;
    font-weight: 600;
    color: var(--gf-gray-700);
    text-align: center;
    transition: all var(--gf-transition);
    line-height: 1.4;
    font-size: 0.95rem;
}

.preset-btn span {
    font-size: 0.75em;
    color: var(--gf-gray-400);
    display: block;
    transition: color var(--gf-transition);
    margin-top: 2px;
}

.preset-btn:hover,
.preset-btn:focus-visible {
    border-color: var(--gf-primary-light);
    color: var(--gf-primary-dark);
    background: var(--gf-primary-50);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
}

.preset-btn.active {
    background: var(--gf-primary);
    color: var(--gf-white);
    border-color: var(--gf-primary);
    box-shadow: var(--gf-shadow-btn);
    transform: translateY(-1px);
}

.preset-btn.active span {
    color: rgba(255, 255, 255, 0.75);
}


/* --------------------------------------------------------------------------
   § 5. Form Controls (Select, Input, Checkbox)
   -------------------------------------------------------------------------- */
.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.25rem 1.5rem;
}

.filter-group label {
    display: block;
    font-weight: 600;
    color: var(--gf-gray-600);
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
}

.input-range {
    display: flex;
    align-items: center;
    gap: 0.5em;
}

.input-range span {
    color: var(--gf-gray-400);
    font-weight: 500;
}

:is(#bf-filter-form, #cf-filter-form) select,
:is(#bf-filter-form, #cf-filter-form) input[type="number"] {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1.5px solid var(--gf-gray-200);
    border-radius: var(--gf-radius-sm);
    font-size: 0.95rem;
    background-color: var(--gf-gray-50);
    color: var(--gf-gray-700);
    transition: border-color var(--gf-transition), box-shadow var(--gf-transition);
    -webkit-appearance: none;
    appearance: none;
}

:is(#bf-filter-form, #cf-filter-form) select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%2364748b' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 14px 10px;
    padding-right: 2.5rem;
}

:is(#bf-filter-form, #cf-filter-form) input[type="number"]::-webkit-outer-spin-button,
:is(#bf-filter-form, #cf-filter-form) input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

:is(#bf-filter-form, #cf-filter-form) input[type="number"] {
    -moz-appearance: textfield;
    appearance: textfield;
}

:is(#bf-filter-form, #cf-filter-form) input:focus,
:is(#bf-filter-form, #cf-filter-form) select:focus {
    border-color: var(--gf-primary-light);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
    background-color: var(--gf-white);
}

/* Checkboxes */
.filter-grid-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.filter-group-checkbox {
    display: flex;
    align-items: center;
}

.filter-group-checkbox input[type="checkbox"] {
    margin-right: 0.6rem;
    width: 1.15em;
    height: 1.15em;
    accent-color: var(--gf-primary);
    border-radius: var(--mg-radius-sm);
}

.filter-group-checkbox label {
    margin-bottom: 0;
    font-weight: 500;
    color: var(--gf-gray-600);
    font-size: 0.9rem;
    cursor: pointer;
}


/* --------------------------------------------------------------------------
   § 6. Submit Button
   -------------------------------------------------------------------------- */
.filter-submit {
    text-align: center;
    margin-top: 2rem;
    border-top: 1px solid var(--gf-gray-100);
    padding-top: 1.75rem;
}

:is(#bf-filter-submit-button, #cf-filter-submit-button) {
    width: 100%;
    max-width: 340px;
    padding: 0.9rem 1.5rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--gf-white);
    background: var(--gf-primary);
    border: none;
    border-radius: var(--gf-radius-full);
    cursor: pointer;
    transition: all var(--gf-transition);
    box-shadow: var(--gf-shadow-btn);
    letter-spacing: 0.02em;
}

:is(#bf-filter-submit-button, #cf-filter-submit-button):hover:not(:disabled) {
    background: var(--gf-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--mg-shadow-lg);
}

:is(#bf-filter-submit-button, #cf-filter-submit-button):active:not(:disabled) {
    transform: translateY(0);
}

:is(#bf-filter-submit-button, #cf-filter-submit-button):disabled {
    background: var(--gf-gray-300);
    color: var(--gf-gray-500);
    cursor: not-allowed;
    box-shadow: none;
}


/* --------------------------------------------------------------------------
   § 7. Result List Wrapper & States
   -------------------------------------------------------------------------- */
:is(#bf-list-wrapper, #cf-list-wrapper) {
    position: relative;
    display: block;
    min-height: 300px;
    clear: both;
}

:is(.bf-initial-state, .cf-initial-state),
:is(.bf-no-results, .cf-no-results),
:is(.bf-error, .cf-error) {
    text-align: center;
    padding: 3.5rem 1.5rem;
    font-size: 1rem;
    color: var(--gf-gray-400);
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    font-weight: 500;
}

:is(.bf-initial-state, .cf-initial-state) {
    background: var(--gf-gray-50);
    border-radius: var(--gf-radius-md);
    border: 1px dashed var(--gf-gray-200);
}

:is(.bf-loading-overlay, .cf-loading-overlay) {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    z-index: var(--mg-z-dropdown);
    transition: opacity var(--gf-transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hidden {
    display: none !important;
}

:is(.bf-state-active, .cf-state-active) {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--mg-z-dropdown);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

:is(.bf-spinner, .cf-spinner) {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gf-gray-200);
    border-top: 3px solid var(--gf-primary);
    border-radius: var(--mg-radius-full);
    animation: gf-spin 0.8s linear infinite;
    margin-bottom: 1rem;
}

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

:is(.bf-loading-overlay, .cf-loading-overlay) p {
    font-weight: 500;
    margin: 0;
    font-size: 0.95rem;
    color: var(--gf-gray-500);
}

:is(.bf-error, .cf-error) button,
:is(.bf-no-results, .cf-no-results) button {
    margin-top: 1.25rem;
    padding: 0.5em 1.5em;
    border-radius: var(--gf-radius-full);
    border: 1.5px solid var(--gf-gray-300);
    background: var(--gf-white);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--gf-transition);
}

:is(.bf-error, .cf-error) button:hover,
:is(.bf-no-results, .cf-no-results) button:hover {
    background: var(--gf-gray-50);
    border-color: var(--gf-gray-400);
}


/* --------------------------------------------------------------------------
   § 8. Result List Container & Sort Buttons
   -------------------------------------------------------------------------- */
:is(#bf-list-container, #cf-list-container) {
    font-family: var(--gf-font);
    margin: 2em auto;
    max-width: var(--gf-max-width);
    padding: 0;
    position: relative;
}

:is(.bf-list-note, .cf-list-note) {
    font-size: 0.8rem;
    color: var(--gf-gray-500);
    background: var(--gf-gray-50);
    border: 1px solid var(--gf-gray-200);
    padding: 0.6rem 1rem;
    border-radius: var(--gf-radius-sm);
    margin-bottom: 1.5em;
    text-align: center;
    font-weight: 500;
}

:is(.bf-sort-buttons-container, .cf-sort-buttons-container) {
    margin-bottom: 1.25em;
    text-align: center;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5em;
}

:is(.bf-btn, .cf-btn) {
    padding: 0.55em 1.2em;
    border: 1.5px solid var(--gf-gray-200);
    background: var(--gf-white);
    color: var(--gf-gray-600);
    cursor: pointer;
    border-radius: var(--gf-radius-full);
    font-size: 0.825rem;
    font-weight: 500;
    transition: all var(--gf-transition);
}

:is(.bf-btn, .cf-btn):hover,
:is(.bf-btn, .cf-btn):focus-visible {
    background: var(--gf-gray-50);
    border-color: var(--gf-gray-300);
    color: var(--gf-gray-700);
}

:is(.bf-btn, .cf-btn).active {
    background: var(--gf-primary);
    color: var(--gf-white);
    border-color: var(--gf-primary);
    box-shadow: var(--gf-shadow-btn);
}


/* --------------------------------------------------------------------------
   § 9. Table View (Desktop)
   -------------------------------------------------------------------------- */
:is(.bf-table-view, .cf-table-view) {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--gf-gray-200);
    border-radius: var(--gf-radius-md);
    overflow: hidden;
    background: var(--gf-white);
    min-width: var(--gf-breakpoint-md);
}

:is(.bf-table-header, .cf-table-header),
:is(.bf-table-row, .cf-table-row) {
    display: flex;
    align-items: stretch;
    border-bottom: 1px solid var(--gf-gray-100);
}

:is(.bf-table-row, .cf-table-row):last-child {
    border-bottom: none;
}

:is(.bf-table-row, .cf-table-row):hover {
    background: var(--gf-primary-50);
}

:is(.bf-table-header, .cf-table-header) {
    background: var(--gf-gray-50);
    color: var(--gf-gray-500);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

:is(.bf-table-cell, .cf-table-cell) {
    padding: 0.85em 0.75em;
    display: flex;
    align-items: center;
    font-size: 0.875rem;
    color: var(--gf-gray-700);
    line-height: 1.5;
}

/* Rank badge */
:is(.bf-cell-rank, .cf-cell-rank) {
    flex: 0 0 60px;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

:is(.bf-cell-rank, .cf-cell-rank) span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: var(--mg-radius-full);
    background: var(--gf-gray-100);
    color: var(--gf-gray-600);
    font-size: 0.85rem;
}

:is(.bf-cell-rank, .cf-cell-rank):is(.bf-rank-1, .cf-rank-1) span {
    background: var(--gf-gold);
    color: var(--gf-gold-text);
    box-shadow: var(--mg-shadow-md);
}

:is(.bf-cell-rank, .cf-cell-rank):is(.bf-rank-2, .cf-rank-2) span {
    background: var(--gf-silver);
    color: var(--mg-gray-700);
}

:is(.bf-cell-rank, .cf-cell-rank):is(.bf-rank-3, .cf-rank-3) span {
    background: var(--gf-bronze);
    color: var(--gf-white);
}

/* Image cell */
:is(.bf-cell-image, .cf-cell-image) {
    flex: 0 0 85px;
    justify-content: center;
}

:is(.bf-cell-image, .cf-cell-image) img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    border-radius: var(--gf-radius-sm);
}

/* Title cell */
:is(.bf-cell-title, .cf-cell-title) {
    flex: 1 1 32%;
    min-width: 200px;
    font-weight: 500;
    color: var(--gf-gray-900);
}

:is(.bf-title-multiline, .cf-title-multiline) {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    overflow: hidden;
}

/* Price cell */
:is(.bf-cell-price, .cf-cell-price) {
    flex: 0 0 135px;
    justify-content: center;
    font-weight: 700;
    color: var(--gf-error);
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

/* Rating cell */
:is(.bf-cell-rating, .cf-cell-rating) {
    flex: 0 0 90px;
    justify-content: center;
    font-weight: 600;
    color: var(--gf-warning);
}

/* Buy cell */
:is(.bf-cell-buy, .cf-cell-buy) {
    flex: 0 0 120px;
    display: flex;
    flex-direction: column;
    gap: 0.4em;
    align-items: stretch;
    justify-content: center;
}

:is(.bf-buy-btn, .cf-buy-btn) {
    padding: 0.5em 0.5em;
    border-radius: var(--gf-radius-sm);
    text-decoration: none;
    color: var(--gf-white) !important;
    font-size: 0.78rem;
    text-align: center;
    display: block;
    font-weight: 600;
    transition: opacity var(--gf-transition), transform var(--gf-transition);
}

:is(.bf-buy-btn, .cf-buy-btn):hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

:is(.bf-buy-btn, .cf-buy-btn).az {
    background: var(--gf-brand-amazon);
    color: #1a1a1a !important;
}

:is(.bf-buy-btn, .cf-buy-btn).rk {
    background: var(--gf-brand-rakuten);
}

:is(.bf-buy-btn, .cf-buy-btn).yh {
    background: var(--gf-brand-yahoo);
    color: #1a1a1a !important;
}


/* --------------------------------------------------------------------------
   § 10. Eval / Summary Visuals
   -------------------------------------------------------------------------- */
:is(.bf-eval-visual, .cf-eval-visual),
:is(.bf-summary-visual, .cf-summary-visual) {
    margin: 2em 0;
    text-align: center;
}

:is(.bf-eval-visual, .cf-eval-visual) img,
:is(.bf-summary-visual, .cf-summary-visual) img {
    width: 100%;
    height: auto;
    border-radius: var(--gf-radius-lg);
    box-shadow: var(--gf-shadow-md);
}


/* --------------------------------------------------------------------------
   § 11. Mobile Card Layout (< 800px)
   -------------------------------------------------------------------------- */
@media (max-width: 782px) {
    :is(#bf-list-container, #cf-list-container) {
        overflow-x: visible;
    }

    :is(.bf-table-view, .cf-table-view) {
        min-width: 0;
        border: none;
        background: transparent;
        gap: 0.75rem;
    }

    :is(.bf-table-header, .cf-table-header) {
        display: none;
    }

    :is(.bf-table-row, .cf-table-row) {
        position: relative;
        display: grid;
        grid-template-columns: 80px 1fr;
        grid-template-rows: auto 1fr auto;
        gap: 0 0.75rem;
        border: 1px solid var(--gf-gray-200);
        background: var(--gf-white);
        border-radius: var(--gf-radius-md);
        padding: 0.9rem;
        box-shadow: var(--gf-shadow-sm);
        transition: transform var(--gf-transition), box-shadow var(--gf-transition);
    }

    :is(.bf-table-row, .cf-table-row):hover {
        transform: translateY(-2px);
        box-shadow: var(--gf-shadow-md);
        background: var(--gf-white);
    }

    :is(.bf-table-cell, .cf-table-cell) {
        padding: 0;
        border-bottom: none;
        height: auto;
        display: flex;
        flex-direction: column;
        align-items: flex-start;
    }

    :is(.bf-cell-rank, .cf-cell-rank) {
        position: absolute;
        top: 0;
        left: 0;
    }

    :is(.bf-cell-rank, .cf-cell-rank) span {
        width: 32px;
        height: 32px;
        border-top-left-radius: var(--gf-radius-md);
        border-bottom-right-radius: var(--gf-radius-md);
        border-top-right-radius: 0;
        border-bottom-left-radius: 0;
        font-size: 0.8rem;
    }

    :is(.bf-cell-image, .cf-cell-image) {
        grid-column: 1 / 2;
        grid-row: 1 / 4;
        gap: 0.4rem;
    }

    :is(.bf-cell-rating, .cf-cell-rating),
    :is(.bf-cell-price, .cf-cell-price) {
        margin-top: auto;
        font-weight: bold;
    }

    :is(.bf-cell-price, .cf-cell-price) {
        color: var(--gf-error);
        font-size: 0.95rem;
    }

    :is(.bf-timestamp, .cf-timestamp) {
        font-weight: normal;
        font-size: 0.7em;
    }

    :is(.bf-cell-title, .cf-cell-title) {
        grid-column: 2 / 3;
        grid-row: 1 / 2;
        font-weight: 600;
        line-height: 1.5;
        color: var(--gf-gray-900);
    }

    :is(.bf-title-multiline, .cf-title-multiline) {
        -webkit-line-clamp: 2;
        line-clamp: 2;
    }

    :is(.bf-cell-buy, .cf-cell-buy) {
        grid-column: 2 / 3;
        grid-row: 3 / 4;
        margin-top: auto;
        padding-top: 0.4rem;
        width: 100%;
        flex-direction: row;
        gap: 0.4rem;
    }

    :is(.bf-buy-btn, .cf-buy-btn) {
        flex-grow: 1;
        font-size: 0.72rem;
        padding: 0.45em 0.3em;
    }

    .detail-card-title {
        padding-left: 40px;
        min-height: auto;
        font-size: 1.15rem;
    }

    :is(.bf-detail-card, .cf-detail-card) {
        padding: 1.25rem;
    }
}


/* --------------------------------------------------------------------------
   § 12. Detail Cards
   -------------------------------------------------------------------------- */
:is(#bf-details-container, #cf-details-container) {
    margin-top: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

:is(.bf-detail-card, .cf-detail-card) {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    background: var(--gf-white);
    border-radius: var(--gf-radius-lg);
    padding: 2rem;
    box-shadow: var(--gf-shadow-md);
    border: 1px solid var(--gf-gray-100);
    transition: box-shadow var(--gf-transition);
}

:is(.bf-detail-card, .cf-detail-card):hover {
    box-shadow: var(--gf-shadow-lg);
}

/* Rank badge corner */
.detail-card-rank {
    position: absolute;
    top: -1px;
    left: -1px;
    width: 38px;
    height: 38px;
    color: var(--gf-white);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom-right-radius: var(--gf-radius-md);
    padding: 0 4px 4px 0;
}

.detail-card-rank span {
    font-size: 1.1rem;
}

.detail-card-rank:is(.bf-rank-1, .cf-rank-1) {
    background: var(--gf-gold);
    color: var(--gf-gold-text);
}

.detail-card-rank:is(.bf-rank-2, .cf-rank-2) {
    background: var(--gf-silver);
    color: var(--mg-gray-700);
}

.detail-card-rank:is(.bf-rank-3, .cf-rank-3) {
    background: var(--gf-bronze);
    color: var(--gf-white);
}

.detail-card-title {
    margin: 0 0 1.25rem 0;
    padding-left: 48px;
    min-height: 3rem;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gf-gray-900);
    display: flex;
    align-items: center;
    letter-spacing: -0.01em;
}

.detail-card-content {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

@media (min-width: 768px) {
    .detail-card-content {
        flex-direction: row;
    }
}

.detail-card-left {
    flex-shrink: 0;
    text-align: center;
    align-self: center;
}

.detail-card-left a {
    display: block;
}

.detail-card-left img {
    width: 170px;
    height: 170px;
    object-fit: contain;
    border-radius: var(--gf-radius-md);
}

.detail-card-right {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.detail-card-excerpt {
    font-size: 0.9rem;
    line-height: 1.75;
    color: var(--gf-gray-600);
    margin: 0 0 0.75rem 0;
}

.detail-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
    align-items: baseline;
    margin-bottom: 1.25rem;
    padding: 0.85rem 1rem;
    background: var(--gf-gray-50);
    border-radius: var(--gf-radius-sm);
    border: 1px solid var(--gf-gray-100);
}

.detail-card-rating {
    font-size: 1.1rem;
    font-weight: 700;
    /* 評価(★)は読者向けの重要情報。yellow-400 は白上 2.05 で読めないため濃amberに(白上 5.9)。 */
    color: #b45309;
}

.detail-card-price {
    font-size: 1rem;
    font-weight: 500;
    color: var(--gf-gray-600);
}

.detail-card-price-value {
    font-size: 1.4rem;
    font-weight: 700;
    /* 価格は読者向けの最重要情報。red-400 は白上 2.64 で読めないため濃い赤に(白上 ~5)。 */
    color: #c0392b;
    margin-left: 0.4rem;
}

.detail-card-no-price {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gf-gray-400);
    background: var(--gf-gray-50);
    padding: 0.2rem 0.5rem;
    border-radius: var(--mg-radius-sm);
    border: 1px solid var(--gf-gray-200);
}

.detail-card-specs-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1.25rem 0;
    font-size: 0.85rem;
    color: var(--gf-gray-600);
    column-count: 1;
}

@media (min-width: 500px) {
    .detail-card-specs-list {
        column-count: 2;
    }
}

.detail-card-specs-list li {
    padding: 0.3rem 0;
    border-bottom: 1px solid var(--gf-gray-100);
}

.detail-card-buttons {
    margin-top: auto;
    padding-top: 1.25rem;
    border-top: 1px solid var(--gf-gray-100);
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.bf-buy-btn-detail,
.cf-buy-btn-detail {
    flex-grow: 1;
    padding: 0.75rem 1.25rem;
    border-radius: var(--gf-radius-sm);
    text-decoration: none;
    color: var(--gf-white) !important;
    font-size: 0.95rem;
    text-align: center;
    font-weight: 600;
    background: var(--mg-green-600, #047857);
    border: none;
    transition: all var(--gf-transition);
}

.bf-buy-btn-detail:hover,
.cf-buy-btn-detail:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.bf-buy-btn-detail.az,
.cf-buy-btn-detail.az {
    background: var(--gf-brand-amazon);
    color: #1a1a1a !important;
}

.bf-buy-btn-detail.rk,
.cf-buy-btn-detail.rk {
    background: var(--gf-brand-rakuten);
    color: var(--gf-white) !important;
}

.bf-buy-btn-detail.yh,
.cf-buy-btn-detail.yh {
    background: var(--gf-brand-yahoo);
    color: #1a1a1a !important;
}


/* --------------------------------------------------------------------------
   § 13. Timestamps & Disclaimer
   -------------------------------------------------------------------------- */
:is(.bf-timestamp, .cf-timestamp),
.detail-card-timestamp {
    display: block;
    font-size: 0.7em;
    color: var(--gf-gray-400);
    font-weight: 400;
    line-height: 1.3;
    white-space: nowrap;
}

.detail-card-timestamp {
    display: inline;
    margin-left: 0.4em;
}

:is(.bf-disclaimer, .cf-disclaimer) {
    font-size: 0.78rem;
    color: var(--gf-gray-500);
    margin: 0 auto 2.5rem;
    padding: 1.25rem;
    border: 1px solid var(--gf-gray-200);
    border-radius: var(--gf-radius-md);
    max-width: var(--gf-max-width);
    background: var(--gf-gray-50);
    display: none;
}

:is(.bf-disclaimer, .cf-disclaimer) ul {
    margin: 0;
    padding-left: 1.2em;
}

:is(.bf-disclaimer, .cf-disclaimer) li {
    margin-bottom: 0.4em;
}

:is(.bf-disclaimer, .cf-disclaimer) li:last-child {
    margin-bottom: 0;
}


/* --------------------------------------------------------------------------
   § 14. PA-API Deal & Sale Badges
   -------------------------------------------------------------------------- */
:is(.bf-image-wrapper, .cf-image-wrapper) {
    position: relative;
}

:is(.bf-deal-badge, .cf-deal-badge) {
    position: absolute;
    top: 4px;
    left: 4px;
    background: linear-gradient(135deg, var(--mg-red-400), var(--mg-color-error));
    color: var(--gf-white);
    padding: 2px 7px;
    border-radius: var(--mg-radius-sm);
    font-size: 0.625rem;
    font-weight: 700;
    z-index: var(--mg-z-base);
    white-space: nowrap;
    box-shadow: var(--mg-shadow-sm);
    letter-spacing: 0.02em;
}

:is(.bf-deal-badge, .cf-deal-badge):is(.bf-lightning, .cf-lightning) {
    background: linear-gradient(135deg, var(--mg-yellow-400), var(--mg-color-warning-border));
    animation: gf-pulse 2s ease-in-out infinite;
    box-shadow: var(--mg-shadow-sm);
}

@keyframes gf-pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.92;
        transform: scale(1.03);
    }
}

:is(.bf-savings-badge, .cf-savings-badge) {
    display: inline-block;
    background: var(--gf-error);
    color: var(--gf-white);
    padding: 1px 6px;
    border-radius: var(--mg-radius-sm);
    font-size: 0.65rem;
    font-weight: 700;
    margin-left: 4px;
}

:is(.bf-points-badge, .cf-points-badge) {
    display: block;
    color: var(--gf-warning);
    font-size: 0.65rem;
    font-weight: 600;
}

:is(.bf-amazon-direct, .cf-amazon-direct) {
    display: block;
    color: var(--gf-brand-detail);
    font-size: 0.6rem;
    font-weight: 700;
    margin-top: 1px;
}


/* --------------------------------------------------------------------------
   § 15. Mobile Badge Adjustments
   -------------------------------------------------------------------------- */
@media (max-width: 782px) {
    :is(.bf-deal-badge, .cf-deal-badge) {
        top: 2px;
        left: auto;
        right: 2px;
        font-size: 0.55rem;
        padding: 1px 4px;
    }

    :is(.bf-savings-badge, .cf-savings-badge) {
        font-size: 0.6rem;
        padding: 1px 4px;
    }

    :is(.bf-points-badge, .cf-points-badge),
    :is(.bf-amazon-direct, .cf-amazon-direct) {
        font-size: 0.55rem;
    }
}


/* --------------------------------------------------------------------------
   § 16. Accessibility: Reduced Motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {

    .preset-btn,
    :is(.bf-btn, .cf-btn),
    :is(.bf-buy-btn, .cf-buy-btn),
    .bf-buy-btn-detail,
    .cf-buy-btn-detail,
    :is(.bf-table-row, .cf-table-row),
    :is(.bf-spinner, .cf-spinner),
    :is(.bf-deal-badge, .cf-deal-badge) {
        transition: none;
        animation: none;
    }

    .preset-btn:hover,
    :is(.bf-btn, .cf-btn):hover,
    :is(.bf-buy-btn, .cf-buy-btn):hover,
    :is(.bf-table-row, .cf-table-row):hover,
    :is(#bf-filter-submit-button, #cf-filter-submit-button):hover:not(:disabled) {
        transform: none;
    }
}