/* Birchfeed - page-local styles for the live feature demos.
   Loaded only by apps/birchfeed/index.html, on top of app.css. Every rule is
   scoped under .calm-app and every class is prefixed bf- so nothing here can
   collide with the shared calm components. The hero, tiles and stepped demo
   runner come from app.css / app.js; this file overrides their colour tokens
   and styles the replicas inside the stages.

   The demos are small HTML replicas of the Birchfeed web app: near-black ink
   on white, with a black pill for whatever is selected. Stepped state is a
   data-step attribute that app.js advances on a timer; all the visual change
   lives here. With no JS the demos rest in their "before" state. */

body.calm-app {
    --bf-ink: #17181b;
    --bf-line: #e6e7ea;
    --bf-wash: #f5f5f6;
    --stage-muted: #74767d;
    --stage-tint: #eef0f3;
    --accent-ink: #2f3238;
    --tile-dark-bg: #17181b;
    --hero-wallpaper: linear-gradient(135deg, #eceef2 0%, #d5d9e0 55%, #c2c7d1 100%);
}

/* A feed's favicon: a plain coloured square, never a real logo. */
.calm-app .bf-fav {
    flex: none;
    width: 0.8rem;
    height: 0.8rem;
    border-radius: 0.22rem;
    background: var(--bf-fav, #9a9ca3);
}

/* ---------- Hero: the web reader ---------- */
.calm-app .bf-reader {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    width: 100%;
    max-width: 34rem;
    height: 28rem;
    border-radius: 1.1rem;
    background: #fff;
    box-shadow: 0 30px 60px -30px rgba(23, 24, 27, 0.55),
                0 0 0 1px rgba(23, 24, 27, 0.06);
    font-family: var(--font-system);
    color: var(--bf-ink);
    text-align: left;
    overflow: hidden;
}

.calm-app .bf-side {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
    padding: 0.9rem 0.6rem;
    border-right: 1px solid var(--bf-line);
    background: var(--bf-wash);
}

.calm-app .bf-side-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0.5rem 0.6rem;
    font-size: 0.9rem;
    font-weight: 700;
}

.calm-app .bf-side-head i {
    color: var(--stage-muted);
}

.calm-app .bf-nav {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.32rem 0.5rem;
    border-radius: 0.5rem;
    font-size: 0.82rem;
    font-weight: 500;
}

.calm-app .bf-nav > span:last-child:not(.bf-nav-name),
.calm-app .bf-nav > i {
    flex: none;
    font-size: 0.72rem;
    font-variant-numeric: tabular-nums;
    color: var(--stage-muted);
}

.calm-app .bf-nav-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.calm-app .bf-nav.is-active {
    background: var(--bf-ink);
    color: #fff;
    font-weight: 700;
}

.calm-app .bf-nav.is-active > span:last-child {
    color: rgba(255, 255, 255, 0.75);
}

.calm-app .bf-nav-quiet {
    color: var(--stage-muted);
}

.calm-app .bf-feeds {
    margin-top: 0.15rem;
    padding-left: 0.5rem;
}

.calm-app .bf-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.calm-app .bf-main-head {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.9rem 0.9rem 0.5rem;
    font-size: 0.9rem;
    color: var(--stage-muted);
}

.calm-app .bf-main-head strong {
    flex: 1;
    color: var(--bf-ink);
}

/* Segmented control, used in the hero (static) and the roundup tile (live) */
.calm-app .bf-seg {
    display: inline-flex;
    align-self: flex-start;
    gap: 0.15rem;
    padding: 0.18rem;
    border-radius: 0.6rem;
    background: #ececee;
}

.calm-app .bf-main > .bf-seg {
    margin: 0 0.9rem 0.6rem;
}

.calm-app .bf-seg > * {
    padding: 0.22rem 0.7rem;
    border: 0;
    border-radius: 0.45rem;
    background: none;
    color: var(--stage-muted);
    font-family: inherit;
    font-size: 0.78rem;
    font-weight: 600;
}

.calm-app .bf-seg > .is-active {
    background: #fff;
    color: var(--bf-ink);
    box-shadow: 0 1px 2px rgba(23, 24, 27, 0.14);
}

.calm-app .bf-seg > button {
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.calm-app .bf-articles {
    flex: 1;
    min-height: 0;
    border-top: 1px solid var(--bf-line);
    overflow: hidden;
}

.calm-app .bf-article {
    max-height: 7rem;
    padding: 0.65rem 0.9rem 0;
    overflow: hidden;
    transition: max-height 0.6s var(--ease-out), opacity 0.5s ease,
                padding-top 0.6s var(--ease-out);
}

.calm-app .bf-article.is-new {
    max-height: 0;
    padding-top: 0;
    opacity: 0;
}

.calm-app .bf-article-feed {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--stage-muted);
}

.calm-app .bf-article-time {
    margin-left: auto;
    font-weight: 500;
    letter-spacing: 0;
    text-transform: none;
}

.calm-app .bf-article-title {
    margin-top: 0.2rem;
    font-size: 0.86rem;
    font-weight: 700;
    line-height: 1.3;
}

.calm-app .bf-article-excerpt {
    display: -webkit-box;
    margin-top: 0.1rem;
    font-size: 0.76rem;
    line-height: 1.4;
    color: var(--stage-muted);
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}

/* ---------- Demo: which option to choose ---------- */
.calm-app .bf-apps {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.calm-app .bf-app {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.85rem;
    border: 1px solid rgba(23, 24, 27, 0.12);
    border-radius: var(--radius-pill);
    background: #fff;
    color: var(--bf-ink);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.calm-app .bf-app:hover {
    border-color: var(--bf-ink);
}

.calm-app .bf-app.is-active {
    background: var(--bf-ink);
    border-color: var(--bf-ink);
    color: #fff;
}

.calm-app .bf-choice {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.7rem;
    min-height: 17rem;
    padding: clamp(1rem, 2.5vw, 1.6rem);
}

.calm-app .bf-choice-lead {
    font-size: 0.95rem;
    color: var(--stage-muted);
}

.calm-app .bf-choice-lead strong {
    color: var(--bf-ink);
}

.calm-app .bf-choice-pills {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.calm-app .bf-pill {
    padding: 0.35rem 0.9rem;
    border-radius: 0.7rem;
    background: var(--bf-ink);
    color: #fff;
    font-size: clamp(1.05rem, 2.2vw, 1.4rem);
    font-weight: 700;
    letter-spacing: -0.01em;
}

.calm-app .bf-or {
    font-size: 0.85rem;
    color: var(--stage-muted);
}

.calm-app .bf-choice-note {
    max-width: 30rem;
    font-size: 0.88rem;
    line-height: 1.5;
    color: var(--stage-muted);
}

.calm-app .bf-choice-shot {
    width: 100%;
    height: 8.5rem;
    border: 1px solid var(--bf-line);
    border-radius: 0.7rem;
    object-fit: cover;
    object-position: top left;
}

.calm-app .bf-choice-shot[hidden] {
    display: none;
}

/* ---------- Demo: the News Stream ---------- */
.calm-app .bf-stream {
    flex: 1 1 19rem;
    max-height: 26rem;
    padding: 0;
    overflow: hidden;
}

.calm-app .bf-stream-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.6rem 0.9rem;
    border-bottom: 1px solid var(--bf-line);
    background: var(--bf-wash);
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--stage-muted);
    white-space: nowrap;
}

.calm-app .bf-stream-bar b {
    color: var(--bf-ink);
    letter-spacing: 0.18em;
}

.calm-app .bf-live {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    min-width: 0;
    overflow: hidden;
}

.calm-app .bf-live i {
    flex: none;
    width: 0.4rem;
    height: 0.4rem;
    border-radius: 50%;
    background: #1f8a3b;
}

.calm-app .bf-stream-body {
    padding: 0 0.9rem;
}

/* Each row is a one-row grid so it can open from 0fr to 1fr without a
   guessed max-height. */
.calm-app .bf-item {
    display: grid;
    grid-template-rows: 1fr;
    transition: grid-template-rows 0.55s var(--ease-out), opacity 0.45s ease;
}

.calm-app .bf-item-inner {
    min-height: 0;
    overflow: hidden;
}

.calm-app .bf-in-1,
.calm-app .bf-in-2,
.calm-app .bf-in-3 {
    grid-template-rows: 0fr;
    opacity: 0;
}

.calm-app .tile[data-step="1"] .bf-in-1,
.calm-app .tile[data-step="2"] .bf-in-1,
.calm-app .tile[data-step="3"] .bf-in-1,
.calm-app .tile[data-step="2"] .bf-in-2,
.calm-app .tile[data-step="3"] .bf-in-2,
.calm-app .tile[data-step="3"] .bf-in-3 {
    grid-template-rows: 1fr;
    opacity: 1;
}

.calm-app .tile[data-demo="stream"][data-step="3"] .demo-note {
    opacity: 1;
    transition-delay: 0.4s;
}

.calm-app .bf-stream-mark {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.7rem 0 0.2rem;
}

.calm-app .bf-stream-mark::before,
.calm-app .bf-stream-mark::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--bf-line);
}

.calm-app .bf-stream-mark span {
    padding: 0.15rem 0.6rem;
    border-radius: var(--radius-pill);
    background: var(--bf-ink);
    color: #fff;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.calm-app .bf-item-feed {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding-top: 0.6rem;
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--stage-muted);
}

.calm-app .bf-item-title {
    margin-top: 0.15rem;
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1.3;
}

.calm-app .bf-item-excerpt {
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--bf-line);
    font-size: 0.78rem;
    line-height: 1.4;
    color: var(--stage-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ---------- Demo: daily roundup ---------- */
.calm-app .bf-times {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.calm-app .bf-times .bf-seg {
    align-self: auto;
    background: #dfe2e7;
}

.calm-app .bf-times .bf-seg > button {
    padding: 0.35rem 0.8rem;
    font-size: 0.82rem;
    font-variant-numeric: tabular-nums;
}

.calm-app .bf-mail {
    padding: 0;
    overflow: hidden;
}

.calm-app .bf-mail-head {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.75rem 0.9rem;
    border-bottom: 1px solid var(--bf-line);
}

.calm-app .bf-mail-head img {
    flex: none;
    width: 2rem;
    height: 2rem;
    border-radius: 0.5rem;
}

.calm-app .bf-mail-who {
    flex: 1;
    min-width: 0;
}

.calm-app .bf-mail-from {
    font-size: 0.72rem;
    color: var(--stage-muted);
}

.calm-app .bf-mail-subject {
    font-size: 0.88rem;
    font-weight: 700;
    line-height: 1.3;
}

.calm-app .bf-mail-time {
    flex: none;
    align-self: flex-start;
    font-size: 0.72rem;
    font-variant-numeric: tabular-nums;
    color: var(--stage-muted);
}

.calm-app .bf-mail-body {
    min-height: 13.5rem;
    padding: 0.8rem 0.9rem 0.9rem;
    transition: opacity 0.18s ease;
}

.calm-app .bf-mail-body.is-swapping {
    opacity: 0;
}

.calm-app .bf-mail-label {
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--bf-line);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--stage-muted);
}

.calm-app .bf-brief {
    margin-top: 0.7rem;
}

.calm-app .bf-brief strong {
    display: block;
    font-size: 0.88rem;
    line-height: 1.3;
}

.calm-app .bf-brief p {
    margin-top: 0.15rem;
    font-size: 0.78rem;
    line-height: 1.45;
    color: #44464c;
}

.calm-app .bf-brief span {
    display: block;
    margin-top: 0.2rem;
    font-size: 0.62rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--stage-muted);
}

/* ---------- Demo: automations ---------- */
.calm-app .bf-rules {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.calm-app .bf-rule {
    padding: 0.8rem 0.9rem;
    border: 1px solid var(--bf-line);
    border-radius: 0.9rem;
    background: #fff;
}

.calm-app .bf-rule-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    cursor: pointer;
}

.calm-app .bf-rule-name {
    min-width: 0;
    font-size: 0.95rem;
    font-weight: 700;
}

.calm-app .bf-rule-head input {
    flex: none;
    width: 1.1rem;
    height: 1.1rem;
    accent-color: #0a6cff;
    cursor: pointer;
}

.calm-app .bf-rule-text {
    margin-top: 0.15rem;
    font-size: 0.84rem;
    line-height: 1.45;
    color: #44464c;
}

.calm-app .bf-rule-hit {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    margin-top: 0.6rem;
    padding: 0.4rem 0.4rem 0.4rem 0.7rem;
    border-radius: 0.6rem;
    background: var(--bf-wash);
    font-size: 0.8rem;
}

.calm-app .bf-rule-article {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    font-weight: 600;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.calm-app .bf-chip {
    flex: none;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-pill);
    background: var(--bf-ink);
    color: #fff;
    font-size: 0.74rem;
    font-weight: 600;
    transition: background-color 0.25s ease, color 0.25s ease;
}

.calm-app .bf-rule.is-off .bf-chip {
    background: #e4e5e8;
    color: var(--stage-muted);
}

.calm-app .bf-rule.is-off .bf-chip i {
    display: none;
}

.calm-app .bf-rule.is-off .bf-rule-text {
    color: var(--stage-muted);
}

/* ---------- Demo: keys ---------- */
.calm-app .bf-key {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.6rem 0.6rem 0.7rem;
}

.calm-app .bf-key + .bf-key {
    border-top: 1px solid var(--bf-line);
}

.calm-app .bf-key-icon {
    flex: none;
    display: grid;
    place-items: center;
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 0.6rem;
    background: var(--bf-wash);
    font-size: 1.1rem;
    transition: opacity 0.25s ease;
}

.calm-app .bf-key-body {
    flex: 1;
    min-width: 0;
}

.calm-app .bf-key-name {
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1.3;
}

.calm-app .bf-key-meta {
    font-size: 0.78rem;
    color: var(--stage-muted);
}

.calm-app .bf-key.is-revoked .bf-key-icon {
    opacity: 0.35;
}

.calm-app .bf-key.is-revoked .bf-key-name {
    color: var(--stage-muted);
    text-decoration: line-through;
}

.calm-app .bf-key .demo-btn:disabled {
    border-color: transparent;
    background: none;
    color: var(--stage-muted);
    cursor: default;
}

.calm-app [data-key-reset][hidden] {
    display: none;
}

/* ---------- The small things, sharing one tile ---------- */
.calm-app .bf-details {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(1.25rem, 2.5vw, 2rem);
    padding: clamp(1rem, 2.2vw, 1.6rem);
}

.calm-app .bf-detail > i {
    display: block;
    margin-bottom: 0.6rem;
    font-size: 1.5rem;
}

.calm-app .bf-detail h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.calm-app .bf-detail p {
    margin-top: 0.35rem;
    font-size: 0.92rem;
    line-height: 1.55;
    color: var(--color-text-secondary);
}

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
    .calm-app .bf-details {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    /* The sidebar goes, as it does in the real reader on a phone. */
    .calm-app .bf-reader {
        grid-template-columns: minmax(0, 1fr);
        height: 25rem;
    }

    .calm-app .bf-side {
        display: none;
    }

    .calm-app .bf-details {
        grid-template-columns: minmax(0, 1fr);
    }

    .calm-app .bf-rule-hit {
        flex-direction: column;
        align-items: flex-start;
        padding: 0.5rem 0.6rem;
    }

    .calm-app .bf-rule-article {
        max-width: 100%;
        white-space: normal;
    }

    .calm-app .bf-stream-bar {
        letter-spacing: 0.06em;
    }
}