/* ==========================================================
   note.html 専用スタイル
   ========================================================== */
.note-container {
    max-width: 680px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.back-link svg {
    width: 16px;
    height: 16px;
}

.back-link:hover {
    color: var(--accent);
}

.back-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ---------- Hero ---------- */
.note-hero {
    margin: 1.75rem 0 3rem;
}

.note-hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.16em;
    color: #2aa894;
    margin-bottom: 0.875rem;
}

.note-hero-title {
    font-size: 2rem;
    font-weight: 900;
    line-height: 1.35;
    letter-spacing: 0.02em;
    margin-bottom: 1.25rem;
}

.note-hero-em {
    background: linear-gradient(transparent 62%, rgba(65, 201, 180, 0.45) 62%);
    padding: 0 0.1em;
}

.note-hero-lead {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.note-hero-lead strong {
    color: var(--text-primary);
}

.note-path {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.625rem;
    counter-reset: step;
}

.note-path-step {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.875rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.note-path-step:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -0.625rem;
    top: 50%;
    width: 0.625rem;
    height: 1px;
    background: var(--border-hover);
}

.note-path-num {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: #2aa894;
    font-weight: 700;
}

.note-path-label {
    font-size: 0.875rem;
    font-weight: 700;
}

.note-path-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ---------- Section ---------- */
.note-section {
    margin-bottom: 3.5rem;
}

.note-section-head {
    margin-bottom: 1.25rem;
}

.note-section-num {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: #fff;
    background: #1a1a1a;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    margin-bottom: 0.625rem;
}

.note-section-title {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: 0.03em;
    margin-bottom: 0.5rem;
}

.note-section-lead {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.75;
}

.note-section-lead strong {
    color: var(--text-primary);
}

/* ---------- Article card ---------- */
.article-grid {
    display: grid;
    gap: 1rem;
}

.article-card {
    --theme: #1a1a1a;
    --theme-soft: rgba(26, 26, 26, 0.08);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.375rem 1.5rem 1.25rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-top: 4px solid var(--theme);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    text-decoration: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    overflow: hidden;
}

.article-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.09);
    border-color: var(--border-hover);
    border-top-color: var(--theme);
}

.article-card:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.article-card.is-featured {
    border-top-width: 4px;
    background:
        radial-gradient(ellipse 70% 60% at 100% 0%, var(--theme-soft) 0%, transparent 60%),
        var(--bg-surface);
}

.article-ribbon {
    position: absolute;
    top: 0.875rem;
    right: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: var(--theme);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    pointer-events: none;
}

.article-ribbon::before {
    content: '★';
    font-size: 0.7rem;
}

.article-top {
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
}

.article-logo {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: var(--theme-soft);
    color: var(--theme);
}

.article-logo img,
.article-logo svg {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    padding-top: 0.25rem;
}

.article-card.is-featured .article-tags {
    padding-right: 9rem;
}

.tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    line-height: 1;
    padding: 0.4rem 0.55rem;
    border-radius: 999px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    white-space: nowrap;
}

.tag-free {
    background: rgba(22, 163, 74, 0.1);
    border-color: rgba(22, 163, 74, 0.3);
    color: #15803d;
    font-weight: 700;
}

.tag-paid {
    background: rgba(180, 83, 9, 0.08);
    border-color: rgba(180, 83, 9, 0.25);
    color: var(--accent);
}

.article-title {
    font-size: 1.2rem;
    font-weight: 800;
    line-height: 1.45;
    letter-spacing: 0.01em;
}

.article-summary {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.article-outcomes {
    padding: 0.875rem 1rem;
    background: var(--bg-elevated);
    border-radius: var(--radius);
}

.article-outcomes-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--theme);
    letter-spacing: 0.04em;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.article-outcomes-label::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--theme);
}

.article-outcomes ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.article-outcomes li {
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.article-outcomes li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.3em;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--theme);
}

.article-outcomes li::after {
    content: '';
    position: absolute;
    left: 0.34rem;
    top: calc(0.3em + 0.2rem);
    width: 0.25rem;
    height: 0.5rem;
    border-right: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: rotate(45deg);
}

.article-outcomes li b {
    font-weight: 700;
    background: linear-gradient(transparent 65%, var(--theme-soft) 65%);
}

.article-cta {
    align-self: flex-end;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.25rem;
    padding: 0.6rem 1rem;
    background: var(--theme);
    color: #fff;
    font-size: 0.8125rem;
    font-weight: 700;
    border-radius: 999px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.article-card:hover .article-cta {
    transform: translateX(2px);
}

/* ---------- Per-tool themes ---------- */
.theme-antigravity {
    --theme: #2563eb;
    --theme-soft: rgba(37, 99, 235, 0.1);
}

.theme-claude {
    --theme: #d97757;
    --theme-soft: rgba(217, 119, 87, 0.12);
}

.theme-codex {
    --theme: #111111;
    --theme-soft: rgba(17, 17, 17, 0.07);
}

.theme-chrome {
    --theme: #1a73e8;
    --theme-soft: rgba(26, 115, 232, 0.1);
}

.theme-chrome .article-logo {
    background: #fff;
    border: 1px solid var(--border);
}

.theme-expo {
    --theme: #0ea5e9;
    --theme-soft: rgba(14, 165, 233, 0.12);
}

.theme-github {
    --theme: #24292f;
    --theme-soft: rgba(36, 41, 47, 0.08);
}

.theme-cloudflare {
    --theme: #f38020;
    --theme-soft: rgba(243, 128, 32, 0.12);
}

/* ---------- Next step ---------- */
.note-next {
    padding: 1.5rem 1.5rem 1.625rem;
    background: #1a1a1a;
    color: #fff;
    border-radius: var(--radius-lg);
    margin-bottom: 2.5rem;
}

.note-next-title {
    font-size: 1.125rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.note-next-lead {
    font-size: 0.875rem;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 1.125rem;
}

.note-next-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
}

.note-next-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1rem;
    border-radius: 999px;
    font-size: 0.8125rem;
    font-weight: 700;
    text-decoration: none;
    transition: transform 0.2s ease, background 0.2s ease;
}

.note-next-btn:hover {
    transform: translateY(-1px);
}

.note-next-btn img {
    width: 18px;
    height: 18px;
    border-radius: 4px;
}

.note-next-btn.is-note {
    background: #41c9b4;
    color: #fff;
}

.note-next-btn.is-note:hover {
    background: #2aa894;
}

.note-next-btn.is-ghost {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.35);
}

.note-next-btn.is-ghost:hover {
    background: rgba(255, 255, 255, 0.08);
}

.note-footer {
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
    .note-hero {
        margin: 1.25rem 0 2.25rem;
    }

    .note-hero-title {
        font-size: 1.5rem;
    }

    .note-path {
        grid-template-columns: 1fr;
    }

    .note-path-step:not(:last-child)::after {
        display: none;
    }

    .note-section-title {
        font-size: 1.25rem;
    }

    .article-card {
        padding: 1.125rem 1.125rem 1rem;
    }

    .article-title {
        font-size: 1.05rem;
    }

    .article-title br {
        display: none;
    }

    .article-logo {
        width: 48px;
        height: 48px;
    }

    .article-logo img,
    .article-logo svg {
        width: 28px;
        height: 28px;
    }

    .article-card.is-featured .article-tags {
        padding-right: 0;
        padding-top: 2rem;
    }

    .article-cta {
        align-self: stretch;
        justify-content: center;
    }
}