:root {
    --canvas: #f2f5f9;
    --surface: #ffffff;
    --surface-soft: #f8f9fc;
    --ink: #182033;
    --muted: #748096;
    --line: #e3e8f0;
    --brand: #315fde;
    --brand-dark: #244ab8;
    --brand-soft: #edf2ff;
    --green: #16866a;
    --green-soft: #e9f7f2;
    --amber: #a76b10;
    --amber-soft: #fff7e8;
    --danger: #c54f57;
    --danger-soft: #fff1f2;
    --shadow: 0 18px 48px rgba(27, 39, 66, 0.08);
    --shadow-soft: 0 7px 24px rgba(27, 39, 66, 0.055);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    color-scheme: light;
    scroll-behavior: smooth;
    scrollbar-gutter: stable;
}

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at 12% -8%, rgba(49, 95, 222, 0.075), transparent 28%),
        radial-gradient(circle at 90% 0%, rgba(87, 174, 151, 0.055), transparent 23%),
        var(--canvas);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

button {
    color: inherit;
    font: inherit;
}

button:focus-visible {
    outline: 3px solid rgba(49, 95, 222, 0.25);
    outline-offset: 2px;
}

[hidden] {
    display: none !important;
}

.app {
    min-height: 100vh;
}

/* Full-screen generation state */
.loading-view {
    position: fixed;
    inset: 0;
    z-index: 30;
    display: grid;
    place-items: center;
    overflow: hidden;
    background:
        radial-gradient(circle at 50% 42%, rgba(63, 104, 226, 0.12), transparent 24%),
        radial-gradient(circle at 16% 18%, rgba(87, 173, 150, 0.07), transparent 26%),
        linear-gradient(180deg, #f8faff, #f0f3f8);
    opacity: 1;
    transition: opacity 650ms ease, transform 650ms cubic-bezier(0.4, 0, 0.2, 1);
}

.loading-view::before {
    content: "";
    position: absolute;
    inset: 0;
    opacity: 0.38;
    background-image:
        linear-gradient(rgba(67, 82, 114, 0.065) 1px, transparent 1px),
        linear-gradient(90deg, rgba(67, 82, 114, 0.065) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(circle at center, #000, transparent 72%);
}

.loading-view.is-leaving {
    opacity: 0;
    transform: scale(1.015);
    pointer-events: none;
}

.loading-content {
    position: relative;
    z-index: 2;
    width: min(680px, calc(100% - 36px));
    text-align: center;
}

.generation-visual {
    position: relative;
    width: 310px;
    height: 310px;
    margin: 0 auto 25px;
}

.generation-halo {
    position: absolute;
    inset: 48px;
    background: rgba(255, 255, 255, 0.72);
    border-radius: 50%;
    box-shadow:
        0 24px 70px rgba(44, 70, 134, 0.12),
        inset 0 0 0 1px rgba(218, 225, 239, 0.9);
    backdrop-filter: blur(12px);
}

.generation-orbit {
    position: absolute;
    inset: 30px;
    border: 1px solid rgba(86, 112, 180, 0.19);
    border-radius: 50%;
    animation: orbit-rotation 8s linear infinite;
    will-change: transform;
}

.generation-orbit.is-inner {
    inset: 66px;
    border-color: rgba(49, 95, 222, 0.23);
    border-style: dashed;
    animation-duration: 5.8s;
    animation-direction: reverse;
}

.generation-orbit::before,
.generation-orbit::after {
    content: "";
    position: absolute;
    width: 11px;
    height: 11px;
    background: #fff;
    border: 3px solid var(--brand);
    border-radius: 50%;
    box-shadow: 0 5px 14px rgba(49, 95, 222, 0.25);
}

.generation-orbit::before {
    left: 22px;
    top: 36px;
}

.generation-orbit::after {
    right: 11px;
    bottom: 66px;
    border-color: #62aa97;
}

.generation-orbit.is-inner::before {
    left: auto;
    right: 18px;
    top: 12px;
    width: 8px;
    height: 8px;
    border-color: #8d70dc;
}

.generation-orbit.is-inner::after {
    display: none;
}

.generation-core {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 116px;
    height: 116px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: #fff;
    background: linear-gradient(145deg, #25334e, #172238);
    border: 8px solid rgba(255, 255, 255, 0.94);
    border-radius: 35px;
    box-shadow: 0 19px 38px rgba(24, 34, 56, 0.23);
    transform: translate(-50%, -50%);
    animation: core-breathe 2.3s ease-in-out infinite;
    will-change: transform;
}

.generation-core strong {
    font-size: 34px;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.06em;
    line-height: 1;
}

.generation-core span {
    margin-top: 7px;
    color: #9eabc2;
    font-size: 8px;
    font-weight: 800;
    letter-spacing: 0.15em;
}

.floating-card {
    --card-rotate: 0deg;
    position: absolute;
    width: 84px;
    height: 54px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(221, 226, 236, 0.95);
    border-radius: 11px;
    box-shadow: 0 10px 28px rgba(35, 48, 76, 0.08);
    backdrop-filter: blur(10px);
    transform: rotate(var(--card-rotate));
    animation: card-float 3.2s ease-in-out infinite;
    will-change: transform;
}

.floating-card::before,
.floating-card::after {
    content: "";
    display: block;
    height: 5px;
    background: #dfe5ef;
    border-radius: 4px;
}

.floating-card::after {
    width: 65%;
    margin-top: 7px;
    background: #edf0f5;
}

.floating-card.is-one {
    left: 0;
    top: 54px;
    --card-rotate: -5deg;
}

.floating-card.is-two {
    right: 0;
    top: 82px;
    --card-rotate: 5deg;
    animation-delay: -0.8s;
}

.floating-card.is-three {
    left: 24px;
    bottom: 29px;
    --card-rotate: 3deg;
    animation-delay: -1.5s;
}

.floating-card.is-four {
    right: 18px;
    bottom: 14px;
    --card-rotate: -4deg;
    animation-delay: -2.2s;
}

.loading-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 11px;
    color: var(--brand);
    font-size: 10px;
    font-weight: 850;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.loading-kicker::before {
    content: "";
    width: 6px;
    height: 6px;
    background: var(--brand);
    border-radius: 50%;
    animation: status-pulse 1.3s ease-in-out infinite;
}

.loading-content h1 {
    margin: 0;
    color: var(--ink);
    font-size: clamp(28px, 4vw, 38px);
    letter-spacing: -0.045em;
}

.loading-content > p {
    margin: 12px auto 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.75;
}

.activity-bars {
    width: min(420px, 82%);
    margin: 27px auto 0;
    display: grid;
    grid-template-columns: repeat(20, 1fr);
    gap: 6px;
}

.activity-bars span {
    height: 4px;
    background: #dce2ec;
    border-radius: 4px;
    animation: activity-wave 2.2s ease-in-out infinite;
    will-change: transform, background-color;
}

.activity-bars span:nth-child(2n) {
    animation-delay: -0.18s;
}

.activity-bars span:nth-child(3n) {
    animation-delay: -0.43s;
}

.activity-bars span:nth-child(5n) {
    animation-delay: -0.72s;
}

.loading-content .request-note {
    margin-top: 13px;
    color: #9aa4b4;
    font-size: 10px;
}

/* Full-width result state */
.result-view {
    width: calc(100% - 48px);
    min-height: 100vh;
    margin: 0 auto;
    padding: 28px 0 64px;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 650ms ease, transform 650ms cubic-bezier(0.4, 0, 0.2, 1);
}

.result-view.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.result-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 20px;
}

.eyebrow {
    color: var(--brand);
    font-size: 10px;
    font-weight: 850;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.result-heading h1 {
    margin: 8px 0;
    font-size: clamp(29px, 3vw, 40px);
    letter-spacing: -0.045em;
    line-height: 1.16;
}

.result-heading p {
    max-width: 740px;
    margin: 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.75;
}

.primary-action {
    min-height: 42px;
    padding: 0 17px;
    flex: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: #fff;
    background: var(--brand);
    border: 0;
    border-radius: 11px;
    box-shadow: 0 9px 20px rgba(49, 95, 222, 0.2);
    font-size: 12px;
    font-weight: 750;
    cursor: pointer;
    transition: background 180ms ease, transform 180ms ease;
}

.primary-action:hover {
    background: var(--brand-dark);
    transform: translateY(-1px);
}

.primary-action svg {
    width: 15px;
    height: 15px;
}

.insight-panel {
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 17px;
    box-shadow: var(--shadow);
}

.insight-head {
    min-height: 70px;
    padding: 18px 21px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    border-bottom: 1px solid var(--line);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 11px;
}

.section-icon {
    width: 31px;
    height: 31px;
    flex: none;
    display: grid;
    place-items: center;
    color: var(--brand);
    background: var(--brand-soft);
    border-radius: 9px;
}

.section-icon svg {
    width: 16px;
    height: 16px;
}

.section-title h2 {
    margin: 0;
    font-size: 14px;
}

.section-title p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 10px;
}

.collapse-button {
    padding: 7px 10px;
    color: #667187;
    background: #f6f7fa;
    border: 1px solid #ebedf2;
    border-radius: 8px;
    font-size: 10px;
    cursor: pointer;
}

.insight-content {
    max-height: 900px;
    opacity: 1;
    transition: max-height 350ms ease, opacity 250ms ease;
}

.insight-panel.is-collapsed .insight-content {
    max-height: 0;
    opacity: 0;
}

.insight-panel.is-collapsed .insight-head {
    border-bottom-color: transparent;
}

.positioning-grid {
    padding: 21px;
    display: grid;
    grid-template-columns: minmax(380px, 2fr) repeat(3, minmax(150px, 0.55fr));
    gap: 12px;
    background: linear-gradient(180deg, #fff, #fbfcfe);
    border-bottom: 1px solid var(--line);
}

.positioning-card {
    padding: 15px 17px;
    color: #fff;
    background: #202a3e;
    border-radius: 12px;
}

.positioning-card > span {
    color: #8694ae;
    font-size: 9px;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.positioning-card strong {
    display: block;
    margin-top: 8px;
    font-size: 16px;
}

.positioning-card p {
    margin: 7px 0 0;
    color: #b4bfd1;
    font-size: 11px;
    line-height: 1.65;
}

.metric-card {
    padding: 15px;
    background: var(--surface-soft);
    border: 1px solid #edf0f4;
    border-radius: 12px;
}

.metric-card > span {
    color: var(--muted);
    font-size: 9px;
}

.metric-card strong {
    display: block;
    margin: 8px 0 3px;
    font-size: 23px;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.03em;
}

.metric-card small {
    color: #99a2b2;
    font-size: 9px;
}

.insight-grid {
    padding: 0 21px 21px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.insight-block {
    padding: 17px;
    background: var(--surface-soft);
    border: 1px solid #edf0f4;
    border-radius: 12px;
}

.block-label {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 7px;
    color: #4d586d;
    font-size: 10px;
    font-weight: 800;
}

.block-label::before {
    content: "";
    width: 6px;
    height: 6px;
    background: var(--brand);
    border-radius: 50%;
}

.insight-block.is-pain .block-label::before {
    background: #8a67d8;
}

.insight-block.is-selling .block-label::before {
    background: var(--green);
}

.chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}

.insight-chip {
    padding: 6px 8px;
    color: #5c6679;
    background: #fff;
    border: 1px solid #e5e9ef;
    border-radius: 7px;
    font-size: 10px;
    line-height: 1.25;
}

.concern-strip {
    margin: 0 21px 21px;
    padding: 14px 16px;
    display: flex;
    align-items: flex-start;
    gap: 18px;
    background: var(--amber-soft);
    border: 1px solid #f6e7c6;
    border-radius: 12px;
}

.concern-title {
    flex: none;
    padding-top: 4px;
    color: var(--amber);
    font-size: 10px;
    font-weight: 850;
}

.concern-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 15px;
}

.concern-item {
    color: #765d31;
    font-size: 10px;
    line-height: 1.6;
}

.concern-item b {
    margin-right: 5px;
    color: #c08322;
    font-size: 9px;
}

.reviews-section {
    margin-top: 34px;
}

.reviews-heading {
    margin-bottom: 14px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
}

.reviews-heading h2 {
    margin: 7px 0 0;
    font-size: 21px;
    letter-spacing: -0.025em;
}

.reviews-meta {
    text-align: right;
}

.reviews-meta span {
    display: inline-block;
    padding: 6px 10px;
    color: var(--brand);
    background: var(--brand-soft);
    border-radius: 999px;
    font-size: 10px;
    font-weight: 800;
}

.reviews-meta small {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 9px;
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 13px;
}

.review-card {
    min-height: 154px;
    padding: 18px 19px 17px;
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: var(--shadow-soft);
    transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.review-card:hover {
    border-color: #ccd6ee;
    box-shadow: 0 13px 28px rgba(27, 39, 66, 0.085);
    transform: translateY(-2px);
}

.review-card-head {
    margin-bottom: 13px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.review-number {
    color: var(--brand);
    font-size: 10px;
    font-weight: 850;
    letter-spacing: 0.08em;
}

.copy-one-button {
    padding: 5px 8px;
    color: #8b95a6;
    background: transparent;
    border: 0;
    border-radius: 7px;
    font-size: 9px;
    cursor: pointer;
}

.copy-one-button:hover {
    color: var(--brand);
    background: var(--brand-soft);
}

.review-copy {
    flex: 1;
    font-size: 13px;
    letter-spacing: 0.006em;
    line-height: 1.85;
    overflow-wrap: anywhere;
}

.review-card-foot {
    margin-top: 15px;
    padding-top: 10px;
    color: #a0a8b6;
    border-top: 1px solid #eff1f5;
    font-size: 9px;
}

/* Full-screen error state */
.error-view {
    position: fixed;
    inset: 0;
    z-index: 25;
    display: grid;
    place-items: center;
    padding: 24px;
    background:
        radial-gradient(circle at 50% 40%, rgba(197, 79, 87, 0.07), transparent 28%),
        var(--canvas);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 450ms ease, transform 450ms ease;
}

.error-view.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.error-card {
    width: min(480px, 100%);
    padding: 38px 34px;
    text-align: center;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

.error-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 18px;
    display: grid;
    place-items: center;
    color: var(--danger);
    background: var(--danger-soft);
    border-radius: 14px;
}

.error-icon svg {
    width: 23px;
    height: 23px;
}

.error-card h1 {
    margin: 9px 0 8px;
    font-size: 24px;
    letter-spacing: -0.035em;
}

.error-card p {
    margin: 0 auto;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.75;
}

.retry-button {
    min-height: 40px;
    margin-top: 21px;
    padding: 0 16px;
    color: var(--brand);
    background: var(--brand-soft);
    border: 0;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 800;
    cursor: pointer;
}

.retry-button:hover {
    background: #e1e9ff;
}

.toast {
    position: fixed;
    right: 24px;
    top: 24px;
    z-index: 60;
    padding: 10px 13px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
    background: #202a3e;
    border-radius: 10px;
    box-shadow: 0 14px 30px rgba(20, 29, 47, 0.2);
    font-size: 10px;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 200ms ease, transform 200ms ease;
}

.toast.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.toast-dot {
    width: 6px;
    height: 6px;
    background: #53d4a7;
    border-radius: 50%;
}

@keyframes orbit-rotation {
    to {
        transform: rotate(360deg);
    }
}

@keyframes core-breathe {
    0%,
    100% {
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.035);
    }
}

@keyframes status-pulse {
    0%,
    100% {
        opacity: 0.35;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1.15);
    }
}

@keyframes card-float {
    0%,
    100% {
        transform: rotate(var(--card-rotate)) translateY(0);
    }
    50% {
        transform: rotate(var(--card-rotate)) translateY(-7px);
    }
}

@keyframes activity-wave {
    0%,
    100% {
        background: #dce2ec;
        transform: scaleY(1);
    }
    50% {
        background: var(--brand);
        transform: scaleY(1.8);
    }
}

@media (min-width: 1700px) {
    .result-view {
        width: calc(100% - 64px);
    }

    .review-grid {
        gap: 16px;
    }

    .review-card {
        padding: 20px 22px 18px;
    }

    .review-copy {
        font-size: 14px;
    }
}

@media (max-width: 980px) {
    .positioning-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .positioning-card {
        grid-column: 1 / -1;
    }
}

@media (max-width: 760px) {
    html {
        scrollbar-gutter: auto;
    }

    .result-view {
        width: calc(100% - 26px);
        padding: 25px 0 48px;
    }

    .result-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 17px;
    }

    .result-heading h1 {
        font-size: 29px;
    }

    .primary-action {
        width: 100%;
    }

    .insight-head {
        padding: 15px;
    }

    .section-title p {
        max-width: 210px;
    }

    .positioning-grid {
        grid-template-columns: 1fr;
        padding: 14px;
    }

    .positioning-card {
        grid-column: auto;
    }

    .metric-card {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .metric-card strong {
        margin: 0;
        font-size: 18px;
    }

    .metric-card small {
        display: none;
    }

    .insight-grid {
        grid-template-columns: 1fr;
        padding: 0 14px 14px;
    }

    .concern-strip {
        margin: 0 14px 14px;
        flex-direction: column;
        gap: 8px;
    }

    .review-grid {
        grid-template-columns: 1fr;
    }

    .review-card {
        min-height: 0;
    }

    .copy-one-button {
        min-width: 44px;
        min-height: 44px;
        margin: -10px -8px -10px 0;
    }

    .toast {
        right: 13px;
        top: 13px;
    }
}

@media (max-width: 640px) {
    .generation-visual {
        width: 270px;
        height: 270px;
    }

    .generation-orbit {
        inset: 28px;
    }

    .generation-orbit.is-inner {
        inset: 60px;
    }

    .generation-halo {
        inset: 43px;
    }

    .floating-card {
        width: 72px;
        height: 48px;
    }

    .generation-core {
        width: 102px;
        height: 102px;
        border-radius: 30px;
    }

    .generation-core strong {
        font-size: 30px;
    }

    .loading-content > p {
        padding: 0 12px;
    }

    .reviews-heading {
        align-items: center;
    }

    .error-card {
        padding: 32px 22px;
    }
}