:root {
    --ink: #0b1210;
    --ink-soft: rgba(11, 18, 16, 0.68);
    --ink-faint: rgba(11, 18, 16, 0.42);
    --paper: #e4e8e3;
    --paper-deep: #d5dbd4;
    --surface: #f4f6f3;
    --surface-strong: #ffffff;
    --accent: #165a4e;
    --accent-bright: #1f7a6a;
    --accent-deep: #0d3d35;
    --accent-wash: rgba(22, 90, 78, 0.1);
    --mark: #b8922a;
    --mark-wash: rgba(184, 146, 42, 0.22);
    --warn: #8a5200;
    --warn-bg: #fff3e0;
    --danger: #8f1d1d;
    --danger-bg: #f8e8e8;
    --ok: #1a5c45;
    --ok-bg: #e4f3ec;
    --line: rgba(11, 18, 16, 0.1);
    --line-strong: rgba(11, 18, 16, 0.18);
    --shadow: 0 40px 90px rgba(11, 18, 16, 0.16);
    --shadow-soft: 0 12px 36px rgba(11, 18, 16, 0.08);
    --radius: 18px;
    --radius-sm: 10px;
    --font-display: "Instrument Serif", Georgia, serif;
    --font-body: "Outfit", "Segoe UI", sans-serif;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --nav-h: 4.25rem;
}

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

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: var(--font-body);
    color: var(--ink);
    background:
        radial-gradient(
            1200px 700px at 8% -20%,
            #c9d5ce 0%,
            transparent 58%
        ),
        radial-gradient(
            900px 560px at 100% 0%,
            #d7dfd6 0%,
            transparent 52%
        ),
        linear-gradient(
            168deg,
            #e7ebe5 0%,
            #eef1ec 42%,
            #dde3db 100%
        );
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
}

body.page-viewer {
    background: #121816;
    color: #e8ece8;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
}

.shell {
    width: min(1240px, calc(100% - 2.5rem));
    margin: 0 auto;
    padding-bottom: 4rem;
}

.shell-flush {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
}

/* ——— Topbar ——— */
.topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-h);
    padding: 0 max(1.25rem, calc((100vw - 1240px) / 2 + 1.25rem));
    backdrop-filter: blur(14px);
    background: rgba(228, 232, 227, 0.78);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.topbar.scrolled {
    border-bottom-color: var(--line);
    background: rgba(244, 246, 243, 0.9);
}

.page-viewer .topbar {
    background: rgba(18, 24, 22, 0.88);
    border-bottom-color: rgba(255, 255, 255, 0.06);
    color: #e8ece8;
}

.brand {
    display: inline-flex;
    align-items: baseline;
    gap: 0.15rem;
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 400;
    letter-spacing: -0.03em;
}

.brand em {
    font-style: italic;
    color: var(--accent);
}

.page-viewer .brand em {
    color: #7dbaad;
}

.nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav a {
    position: relative;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--ink-soft);
    padding: 0.35rem 0;
    transition: color 0.2s var(--ease);
}

.nav a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -0.15rem;
    height: 1.5px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.28s var(--ease);
}

.nav a:hover,
.nav a.active {
    color: var(--ink);
}

.nav a.active::after,
.nav a:hover::after {
    transform: scaleX(1);
}

.page-viewer .nav a {
    color: rgba(232, 236, 232, 0.62);
}

.page-viewer .nav a:hover,
.page-viewer .nav a.active {
    color: #fff;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: 0.55rem 1rem !important;
    border-radius: 999px;
    background: var(--ink);
    color: #f4f6f3 !important;
    font-weight: 600 !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--accent-deep);
    color: #fff !important;
}

/* ——— Buttons ——— */
.btn {
    appearance: none;
    border: 0;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 999px;
    padding: 0.9rem 1.35rem;
    transition:
        transform 0.2s var(--ease),
        background 0.2s var(--ease),
        box-shadow 0.2s var(--ease),
        color 0.2s var(--ease);
}

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

.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: var(--ink);
    color: #f4f6f3;
    box-shadow: 0 14px 34px rgba(11, 18, 16, 0.22);
}

.btn-primary:hover {
    background: var(--accent-deep);
}

.btn-secondary {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--line-strong);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.55);
}

.btn-accent {
    background: var(--accent);
    color: #fff;
}

.btn-ghost-dark {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.btn-sm {
    padding: 0.5rem 0.85rem;
    font-size: 0.82rem;
}

/* ——— Landing (home) ——— */
.page-home {
    background:
        radial-gradient(
            900px 520px at 0% 0%,
            #d5e0d8 0%,
            transparent 55%
        ),
        linear-gradient(180deg, #eef1ec 0%, #e2e7e1 100%);
}

.page-home .topbar {
    background: transparent;
    backdrop-filter: none;
}

.page-home .topbar.scrolled {
    background: rgba(238, 241, 236, 0.92);
    backdrop-filter: blur(12px);
}

.landing {
    display: grid;
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: 1.5rem;
    min-height: calc(100vh - var(--nav-h));
    width: min(1280px, calc(100% - 2.5rem));
    margin: 0 auto;
    align-items: center;
    padding: 1rem 0 2.5rem;
}

.landing-copy {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1rem 1rem 2rem 0;
    animation: rise 0.75s var(--ease) both;
}

.landing-copy .mark {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(3.6rem, 8.5vw, 6.2rem);
    line-height: 0.9;
    letter-spacing: -0.045em;
    margin: 0 0 1.25rem;
}

.landing-copy .mark em {
    font-style: italic;
    color: var(--accent);
}

.landing-copy .lede {
    margin: 0 0 1.85rem;
    max-width: 26rem;
    font-size: 1.12rem;
    line-height: 1.55;
    color: var(--ink-soft);
}

.landing-visual {
    position: relative;
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 0.85rem;
    align-items: center;
    min-height: min(72vh, 560px);
    padding: 1.25rem;
    border-radius: 28px;
    background:
        linear-gradient(
            145deg,
            #152822 0%,
            #1f3a32 48%,
            #2a4a40 100%
        );
    box-shadow: 0 30px 70px rgba(11, 18, 16, 0.18);
    animation: sheet-in 0.95s var(--ease) 0.1s both;
    overflow: hidden;
}

.corpus-rail {
    position: relative;
    z-index: 2;
    padding: 0.35rem 0.15rem;
    color: rgba(232, 236, 232, 0.78);
}

.corpus-rail-label,
.corpus-rail-meta {
    margin: 0;
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(232, 236, 232, 0.45);
}

.corpus-rail ul {
    list-style: none;
    margin: 0.85rem 0 1rem;
    padding: 0;
    display: grid;
    gap: 0.4rem;
}

.corpus-rail li {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.72rem;
    line-height: 1.25;
    padding: 0.45rem 0.5rem;
    border-radius: 8px;
    color: rgba(232, 236, 232, 0.62);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.corpus-rail li span {
    flex-shrink: 0;
    font-size: 0.58rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    padding: 0.15rem 0.3rem;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.08);
}

.corpus-rail li.is-active {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.stack {
    position: relative;
    height: min(58vh, 460px);
    display: grid;
    place-items: center;
}

.sheet {
    background: #fbfcf9;
    color: var(--ink);
    border-radius: 4px;
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.28);
}

.sheet-back {
    position: absolute;
    width: min(88%, 340px);
    height: 78%;
}

.sheet-c {
    transform: translate(18px, -18px) rotate(4deg);
    background: #e7ebe6;
    animation: stack-breathe 6.5s ease-in-out infinite;
}

.sheet-b {
    transform: translate(8px, -8px) rotate(1.8deg);
    background: #f1f4f0;
    animation: stack-breathe 6.5s ease-in-out 0.35s infinite;
}

.sheet-front {
    position: relative;
    z-index: 2;
    width: min(92%, 360px);
    min-height: 78%;
    padding: 1.25rem 1.35rem;
    display: flex;
    flex-direction: column;
    animation: sheet-float 7s ease-in-out 0.8s infinite;
}

.page-sheet-head {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-size: 0.65rem;
    font-weight: 650;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: 1rem;
    padding-bottom: 0.7rem;
    border-bottom: 1px solid rgba(11, 18, 16, 0.1);
}

.sheet-front h2 {
    font-family: var(--font-display);
    font-size: 1.45rem;
    font-weight: 400;
    letter-spacing: -0.02em;
    margin: 0 0 1rem;
    line-height: 1.15;
}

.sheet-front .ghost {
    margin: 0;
    font-size: 0.88rem;
    line-height: 1.5;
    color: rgba(11, 18, 16, 0.4);
}

.sheet-front .marked {
    margin: 0 0 0.9rem;
    padding: 0.8rem 0.85rem;
    font-size: 0.92rem;
    line-height: 1.45;
    color: var(--ink);
    background: linear-gradient(
        90deg,
        rgba(184, 146, 42, 0.3),
        rgba(184, 146, 42, 0.12)
    );
    border-left: 3px solid var(--mark);
    animation: mark-in 0.9s var(--ease) 0.55s both;
}

.page-sheet-foot {
    margin-top: auto;
    padding-top: 0.85rem;
    border-top: 1px solid rgba(11, 18, 16, 0.08);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-faint);
}

.section.pitch,
.section.demo-strip,
.section.proof,
.section.close-cta {
    width: min(1100px, calc(100% - 2.5rem));
    margin-left: auto;
    margin-right: auto;
}

.pitch-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 1px solid var(--line-strong);
}

.pitch-grid article {
    padding: 1.6rem 1.35rem 1.6rem 0;
    border-right: 1px solid var(--line);
    animation: rise 0.65s var(--ease) both;
}

.pitch-grid article:nth-child(2) {
    padding-left: 1.35rem;
    animation-delay: 0.06s;
}

.pitch-grid article:nth-child(3) {
    padding-left: 1.35rem;
    border-right: 0;
    animation-delay: 0.12s;
}

.pitch-grid h3 {
    margin: 0 0 0.5rem;
    font-size: 1.05rem;
    font-weight: 650;
}

.pitch-grid p {
    margin: 0;
    color: var(--ink-soft);
    line-height: 1.5;
    font-size: 0.95rem;
}

.demo-flow {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.demo-step {
    padding: 1.25rem 1.15rem;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid var(--line);
    animation: rise 0.6s var(--ease) both;
}

.demo-step:nth-child(2) {
    animation-delay: 0.06s;
}

.demo-step:nth-child(3) {
    animation-delay: 0.12s;
}

.demo-step span {
    display: block;
    margin-bottom: 0.55rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
}

.demo-step p {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.2rem;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

.demo-cta {
    margin-top: 1.5rem;
}

.close-cta {
    text-align: center;
    padding: 3.5rem 0 2rem;
}

.close-cta h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 400;
    letter-spacing: -0.03em;
    margin: 0 0 0.65rem;
}

.close-cta p {
    margin: 0 0 1.5rem;
    color: var(--ink-soft);
}

.close-cta .cta-row {
    justify-content: center;
}

.section.proof {
    padding-top: 2.5rem;
}

.hero {
    display: none;
}

@keyframes sheet-in {
    from {
        opacity: 0;
        transform: translateX(24px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes sheet-float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-6px);
    }
}

@keyframes stack-breathe {
    0%,
    100% {
        filter: brightness(1);
    }
    50% {
        filter: brightness(1.03);
    }
}

@keyframes mark-in {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 980px) {
    .landing {
        grid-template-columns: 1fr;
        min-height: auto;
        gap: 1.5rem;
    }

    .landing-copy {
        padding: 1.25rem 0 0;
    }

    .landing-visual {
        grid-template-columns: 1fr;
        min-height: auto;
        padding: 1rem;
    }

    .corpus-rail ul {
        display: flex;
        flex-wrap: wrap;
        gap: 0.4rem;
    }

    .corpus-rail li {
        max-width: 100%;
    }

    .stack {
        height: 380px;
        margin-top: 0.5rem;
    }

    .pitch-grid,
    .demo-flow {
        grid-template-columns: 1fr;
    }

    .pitch-grid article,
    .pitch-grid article:nth-child(2),
    .pitch-grid article:nth-child(3) {
        padding: 1.25rem 0;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }
}

/* ——— Section ——— */
.section {
    width: min(1240px, calc(100% - 2.5rem));
    margin: 0 auto;
    padding: 4.5rem 0 2rem;
}

.section-head {
    max-width: 34rem;
    margin-bottom: 2.5rem;
    animation: rise 0.7s var(--ease) both;
}

.section-head h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 400;
    letter-spacing: -0.03em;
    margin: 0 0 0.65rem;
}

.section-head p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 1.05rem;
    line-height: 1.55;
}

.flow {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 1px solid var(--line-strong);
}

.flow-step {
    padding: 1.75rem 1.4rem 1.75rem 0;
    border-right: 1px solid var(--line);
    animation: rise 0.7s var(--ease) both;
}

.flow-step:nth-child(2) {
    padding-left: 1.4rem;
    animation-delay: 0.08s;
}

.flow-step:nth-child(3) {
    padding-left: 1.4rem;
    border-right: 0;
    animation-delay: 0.16s;
}

.flow-step .num {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.4rem;
    color: var(--accent);
    display: block;
    margin-bottom: 0.75rem;
}

.flow-step h3 {
    margin: 0 0 0.45rem;
    font-size: 1.05rem;
    font-weight: 650;
}

.flow-step p {
    margin: 0;
    color: var(--ink-soft);
    line-height: 1.5;
    font-size: 0.95rem;
}

.site-footer {
    width: min(1240px, calc(100% - 2.5rem));
    margin: 3rem auto 0;
    padding: 1.5rem 0 2rem;
    border-top: 1px solid var(--line);
    color: var(--ink-faint);
    font-size: 0.85rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ——— Ask workspace (chat-first) ——— */
.page-ask {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.ask-app {
    width: min(780px, calc(100% - 2rem));
    margin: 0 auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    height: calc(100vh - var(--nav-h));
    padding: 0.75rem 0 1rem;
}

.ask-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.35rem 0 0.75rem;
    flex-shrink: 0;
}

.ask-toolbar-left {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    min-width: 0;
}

.ask-title {
    font-family: var(--font-display);
    font-size: 1.35rem;
    letter-spacing: -0.02em;
}

.ask-corp {
    font-size: 0.82rem;
    color: var(--ink-faint);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#filters-toggle.is-on {
    background: var(--accent-wash);
    border-color: var(--accent);
    color: var(--accent-deep);
}

.ask-filters {
    display: grid;
    grid-template-columns: 1fr 1.4fr auto auto;
    gap: 0.5rem;
    padding: 0 0 0.85rem;
    flex-shrink: 0;
    animation: rise 0.25s var(--ease) both;
}

.ask-filters[hidden] {
    display: none !important;
}

.ask-filters select,
.ask-filters input {
    width: 100%;
    border: 1px solid var(--line-strong);
    background: rgba(255, 255, 255, 0.75);
    border-radius: 10px;
    padding: 0.55rem 0.65rem;
    font-size: 0.85rem;
    outline: none;
}

.ask-filters select:focus,
.ask-filters input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-wash);
}

.workspace {
    width: min(1240px, calc(100% - 2.5rem));
    margin: 0 auto;
    padding: 1.25rem 0 3rem;
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 1.25rem;
    min-height: calc(100vh - var(--nav-h) - 2rem);
}

.rail {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding-top: 0.35rem;
    animation: rise 0.55s var(--ease) both;
}

.rail-block h2 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 400;
    margin: 0 0 0.35rem;
}

.rail-block p {
    margin: 0 0 1rem;
    color: var(--ink-faint);
    font-size: 0.88rem;
    line-height: 1.45;
}

.field {
    display: grid;
    gap: 0.35rem;
    margin-bottom: 0.85rem;
}

.field label {
    font-size: 0.72rem;
    font-weight: 650;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-faint);
}

.field select,
.field input,
.composer-box textarea,
.library-form input[type="text"] {
    width: 100%;
    border: 1px solid var(--line-strong);
    background: rgba(255, 255, 255, 0.72);
    border-radius: var(--radius-sm);
    padding: 0.7rem 0.8rem;
    outline: none;
    transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.field select:focus,
.field input:focus,
.composer-box textarea:focus,
.library-form input[type="text"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-wash);
}

.rail-metrics {
    display: grid;
    gap: 0.55rem;
}

.metric {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.55rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 0.9rem;
}

.metric b {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 400;
}

.stage {
    display: flex;
    flex-direction: column;
    min-height: 0;
    animation: rise 0.6s var(--ease) 0.05s both;
}

.stage-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 1rem;
    margin-bottom: 1rem;
}

.stage-head h1 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 400;
    letter-spacing: -0.03em;
    margin: 0;
}

.stage-head p {
    margin: 0.35rem 0 0;
    color: var(--ink-soft);
    max-width: 36rem;
}

.page-ask .thread {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow: auto;
    padding: 0.5rem 0.1rem 1.25rem;
    min-height: 0;
    max-height: none;
}

.thread {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow: auto;
    padding: 0.25rem 0.15rem 1rem;
    min-height: 42vh;
    max-height: calc(100vh - 22rem);
}

.thread-empty {
    margin: auto 0;
    max-width: 34rem;
    padding: 1.5rem 0 2rem;
    animation: rise 0.5s var(--ease) both;
}

.thread-empty h1,
.thread-empty h3 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    font-weight: 400;
    margin: 0 0 0.55rem;
    letter-spacing: -0.03em;
}

.thread-empty p {
    margin: 0 0 1.35rem;
    color: var(--ink-soft);
    line-height: 1.5;
}

.prompt-list {
    display: grid;
    gap: 0.5rem;
}

.prompt-list button {
    text-align: left;
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0.85rem 1rem;
    cursor: pointer;
    font-size: 0.92rem;
    line-height: 1.35;
    color: var(--ink);
    transition:
        border-color 0.2s var(--ease),
        background 0.2s var(--ease),
        transform 0.2s var(--ease);
}

.prompt-list button:hover {
    border-color: var(--accent);
    background: #fff;
    transform: translateX(3px);
}

.prompt-list strong {
    display: block;
    font-size: 0.92rem;
    margin-bottom: 0.15rem;
}

.prompt-list span {
    font-size: 0.8rem;
    color: var(--ink-faint);
}

.msg {
    max-width: min(640px, 94%);
    animation: rise 0.35s var(--ease) both;
}

.msg.user {
    align-self: flex-end;
}

.msg.assistant {
    align-self: flex-start;
    width: min(640px, 100%);
    max-width: 100%;
}

.msg-body {
    padding: 1rem 1.15rem;
    border-radius: 16px;
    line-height: 1.55;
    white-space: pre-wrap;
}

.msg.user .msg-body {
    background: var(--ink);
    color: #f3f6f3;
    border-bottom-right-radius: 6px;
}

.msg.assistant .msg-body {
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid var(--line);
    border-bottom-left-radius: 6px;
}

.msg-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    align-items: center;
    margin-bottom: 0.55rem;
    font-size: 0.78rem;
    color: var(--ink-faint);
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-weight: 650;
    font-size: 0.72rem;
    letter-spacing: 0.02em;
}

.pill-ok {
    background: var(--ok-bg);
    color: var(--ok);
}

.pill-warn {
    background: var(--warn-bg);
    color: var(--warn);
}

.citations {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-top: 0.85rem;
}

.cite {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0.65rem;
    align-items: start;
    text-align: left;
    width: 100%;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 12px;
    padding: 0.7rem 0.85rem;
    cursor: pointer;
    transition:
        border-color 0.2s var(--ease),
        transform 0.2s var(--ease);
}

.cite:hover {
    border-color: var(--accent);
    transform: translateY(-1px);
}

.cite-idx {
    font-family: var(--font-display);
    font-style: italic;
    color: var(--accent);
    font-size: 1.05rem;
}

.cite-main strong {
    display: block;
    font-size: 0.88rem;
}

.cite-main span {
    display: block;
    margin-top: 0.2rem;
    font-size: 0.78rem;
    color: var(--ink-faint);
    line-height: 1.35;
}

.cite-page {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--mark);
    text-transform: uppercase;
}

.typing {
    display: inline-flex;
    gap: 0.28rem;
    padding: 0.35rem 0;
}

.typing i {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ink-faint);
    animation: blink 1.1s infinite ease-in-out;
}

.typing i:nth-child(2) {
    animation-delay: 0.15s;
}

.typing i:nth-child(3) {
    animation-delay: 0.3s;
}

.page-ask .composer {
    margin-top: 0;
    position: relative;
    bottom: auto;
    flex-shrink: 0;
    padding-top: 0.25rem;
}

.composer {
    margin-top: auto;
    position: sticky;
    bottom: 0.5rem;
}

.page-ask .composer-box {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.75rem;
    align-items: end;
    padding: 0.85rem 0.9rem;
}

.composer-box {
    display: grid;
    gap: 0.75rem;
    padding: 0.9rem;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid var(--line-strong);
    border-radius: 18px;
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(10px);
}

.page-ask .composer-box textarea {
    border: 0;
    background: transparent;
    resize: none;
    min-height: 52px;
    max-height: 160px;
    padding: 0.35rem 0.15rem;
    box-shadow: none !important;
    font-size: 1rem;
}

.composer-box textarea {
    border: 0;
    background: transparent;
    resize: none;
    min-height: 72px;
    padding: 0.35rem 0.25rem;
    box-shadow: none !important;
}

.composer-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
}

.composer-hint {
    font-size: 0.78rem;
    color: var(--ink-faint);
}

/* ——— Library ——— */
.page-library {
    min-height: 100vh;
}

.lib {
    width: min(920px, calc(100% - 2.5rem));
    margin: 0 auto;
    padding: 1.5rem 0 4rem;
}

.lib-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1.25rem;
    margin-bottom: 2rem;
    animation: rise 0.5s var(--ease) both;
}

.lib-head h1 {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 5vw, 3.4rem);
    font-weight: 400;
    letter-spacing: -0.04em;
    margin: 0;
    line-height: 1;
}

.lib-head p {
    margin: 0.55rem 0 0;
    color: var(--ink-faint);
    font-size: 0.92rem;
}

.lib-ask {
    margin-top: 0.55rem;
    font-size: 0.92rem;
    font-weight: 650;
    color: var(--accent-deep);
    white-space: nowrap;
}

.lib-ask:hover {
    color: var(--ink);
}

.lib-upload {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 140px auto;
    gap: 0.65rem;
    align-items: stretch;
    margin-bottom: 0.35rem;
    animation: rise 0.55s var(--ease) 0.05s both;
}

.lib-drop {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    min-height: 64px;
    padding: 0.75rem 1rem;
    border: 1px dashed rgba(22, 90, 78, 0.35);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.55);
    cursor: pointer;
    transition:
        border-color 0.2s var(--ease),
        background 0.2s var(--ease),
        transform 0.2s var(--ease);
}

.lib-drop.drag,
.lib-drop:hover {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.9);
}

.lib-drop-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: var(--ink);
    color: #f4f6f3;
    font-size: 1rem;
    flex-shrink: 0;
}

.lib-drop-copy {
    min-width: 0;
}

.lib-drop-copy strong {
    display: block;
    font-size: 0.92rem;
    font-weight: 650;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lib-drop-copy span {
    display: block;
    margin-top: 0.15rem;
    font-size: 0.78rem;
    color: var(--ink-faint);
}

.lib-drop input {
    display: none;
}

.lib-upload > input[type="text"] {
    border: 1px solid var(--line-strong);
    background: rgba(255, 255, 255, 0.75);
    border-radius: 14px;
    padding: 0 0.9rem;
    outline: none;
}

.lib-upload > input[type="text"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-wash);
}

.lib-status {
    grid-column: 1 / -1;
    margin: 0.35rem 0 0;
    font-size: 0.85rem;
    color: var(--ink-soft);
}

.lib-status.is-error {
    color: var(--danger);
}

.lib-list {
    margin-top: 1.5rem;
    border-top: 1px solid var(--line-strong);
    animation: rise 0.55s var(--ease) 0.1s both;
}

.lib-row {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr) auto;
    gap: 1rem;
    align-items: center;
    padding: 1.1rem 0.15rem;
    border-bottom: 1px solid var(--line);
    transition: background 0.2s var(--ease);
}

.lib-row:hover {
    background: rgba(255, 255, 255, 0.35);
}

.lib-ext {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: #1a2e28;
    color: #d7e4de;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.lib-main h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 650;
    letter-spacing: -0.01em;
}

.lib-main p {
    margin: 0.35rem 0 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 0.45rem;
    font-size: 0.8rem;
    color: var(--ink-faint);
}

.lib-main .dot {
    opacity: 0.55;
}

.lib-actions {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.lib-link {
    appearance: none;
    border: 0;
    background: none;
    padding: 0;
    font: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--accent-deep);
    cursor: pointer;
    text-decoration: none;
}

.lib-link:hover {
    color: var(--ink);
}

.lib-link.danger {
    color: var(--ink-faint);
}

.lib-link.danger:hover {
    color: var(--danger);
}

.lib-empty {
    padding: 3rem 0.25rem;
    text-align: left;
}

.lib-empty h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 400;
    margin: 0 0 0.45rem;
}

.lib-empty p {
    margin: 0;
    color: var(--ink-soft);
}

@media (max-width: 720px) {
    .lib-upload {
        grid-template-columns: 1fr;
    }

    .lib-row {
        grid-template-columns: 44px minmax(0, 1fr);
        gap: 0.75rem;
    }

    .lib-actions {
        grid-column: 2;
        justify-content: flex-start;
        padding-top: 0.15rem;
    }
}

/* ——— Viewer ——— */
.viewer-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    min-height: calc(100vh - var(--nav-h));
}

#pdf-canvas-wrap {
    position: relative;
    background:
        radial-gradient(
            800px 500px at 50% 0%,
            #1c2622 0%,
            #121816 70%
        );
    display: grid;
    place-items: center;
    overflow: auto;
    padding: 1.5rem;
}

#pdf-canvas-wrap canvas {
    max-width: 100%;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
    background: #fff;
}

#highlight-layer {
    position: absolute;
    pointer-events: none;
    z-index: 2;
}

.highlight-box {
    position: absolute;
    border: 2px solid var(--mark);
    background: var(--mark-wash);
    border-radius: 3px;
    mix-blend-mode: multiply;
}

.viewer-side {
    padding: 1.5rem 1.25rem;
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    background: #161d1a;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.viewer-side h1 {
    font-family: var(--font-display);
    font-size: 1.55rem;
    font-weight: 400;
    margin: 0;
    line-height: 1.2;
}

.viewer-side .page-label {
    margin: 0;
    color: rgba(232, 236, 232, 0.55);
    font-size: 0.85rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.viewer-side .excerpt {
    margin: 0;
    padding: 1rem;
    border-left: 3px solid var(--mark);
    background: rgba(184, 146, 42, 0.12);
    line-height: 1.5;
    color: rgba(232, 236, 232, 0.9);
    font-size: 0.95rem;
}

.viewer-nav {
    display: flex;
    gap: 0.55rem;
    margin-top: auto;
}

/* ——— Motion ——— */
@keyframes rise {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes plane-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes doc-rise {
    from {
        opacity: 0;
        transform: rotate(-1.5deg) translateY(36px);
    }
    to {
        opacity: 1;
        transform: rotate(-1.5deg) translateY(12px);
    }
}

@keyframes cite-in {
    from {
        opacity: 0;
        transform: translateX(-90%);
    }
    to {
        opacity: 1;
        transform: translateX(-100%);
    }
}

@keyframes hl-pulse {
    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(184, 146, 42, 0);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(184, 146, 42, 0.12);
    }
}

@keyframes blink {
    0%,
    80%,
    100% {
        opacity: 0.25;
        transform: translateY(0);
    }
    40% {
        opacity: 1;
        transform: translateY(-2px);
    }
}

/* ——— Responsive ——— */
@media (max-width: 980px) {
    .flow {
        grid-template-columns: 1fr;
    }

    .flow-step,
    .flow-step:nth-child(2),
    .flow-step:nth-child(3) {
        padding: 1.25rem 0;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .viewer-layout {
        grid-template-columns: 1fr;
    }

    .ask-filters {
        grid-template-columns: 1fr 1fr;
    }

    .viewer-side {
        border-left: 0;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
}

@media (max-width: 640px) {
    .nav {
        gap: 0.85rem;
    }

    .nav .hide-sm {
        display: none;
    }

    .ask-filters {
        grid-template-columns: 1fr;
    }

    .page-ask .composer-box {
        grid-template-columns: 1fr;
    }

    .landing-copy .mark {
        font-size: clamp(3rem, 14vw, 4.2rem);
    }

    .corpus-rail {
        display: none;
    }

    .landing-visual {
        grid-template-columns: 1fr;
    }
}