:root {
    color-scheme: light;
    --bg: #f4f6f8;
    --surface: #ffffff;
    --surface-soft: #eef2f5;
    --text: #17202a;
    --muted: #667085;
    --line: #dce3ea;
    --brand: #0f766e;
    --brand-dark: #134e4a;
    --accent: #2563eb;
    --radius: 8px;
    --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

button,
select,
textarea {
    font: inherit;
}

.app-shell {
    min-height: 100vh;
}

.sidebar {
    display: none;
}

.main {
    padding: 18px 16px 92px;
}

.brand {
    display: flex;
    gap: 12px;
    align-items: center;
}

.brand-mark {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border-radius: 10px;
    background: var(--brand-dark);
    color: white;
    font-weight: 800;
}

.brand small,
.eyebrow,
.metric-card span,
.campaign-row p,
.score-card small,
.section-heading span,
.calendar-list small {
    color: var(--muted);
}

.topbar {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 18px;
}

.topbar-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.topbar h1,
.hero-panel h2,
.section-heading h2,
.panel h2 {
    margin: 0;
    letter-spacing: 0;
}

.topbar h1 {
    font-size: clamp(1.45rem, 5vw, 2.35rem);
}

.eyebrow {
    margin: 0 0 5px;
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.primary-action,
.secondary-action {
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: var(--radius);
    padding: 0 14px;
    font-weight: 800;
    cursor: pointer;
}

.primary-action {
    background: var(--brand);
    color: white;
}

.secondary-action {
    background: var(--surface-soft);
    color: var(--text);
}

.full-width {
    width: 100%;
}

.hero-panel,
.panel,
.section-block {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.hero-panel {
    display: grid;
    gap: 18px;
    padding: 20px;
}

.hero-panel h2 {
    max-width: 760px;
    font-size: clamp(1.65rem, 8vw, 4.3rem);
    line-height: 0.98;
}

.hero-panel p {
    max-width: 650px;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.6;
}

.score-card {
    display: grid;
    gap: 3px;
    align-content: center;
    border-radius: var(--radius);
    background: var(--surface-soft);
    padding: 16px;
}

.score-card strong {
    font-size: 3rem;
    line-height: 1;
}

.signal-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 14px 0;
}

.metric-card {
    display: grid;
    gap: 8px;
    min-height: 118px;
    align-content: space-between;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    padding: 14px;
}

.metric-card strong {
    font-size: 1.1rem;
}

.metric-card small {
    color: var(--brand);
    font-weight: 800;
}

.section-block,
.panel {
    padding: 16px;
    margin-top: 14px;
}

.section-heading {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.section-heading a {
    color: var(--brand);
    font-weight: 800;
}

.campaign-list,
.calendar-list {
    display: grid;
    gap: 10px;
}

.campaign-row {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 13px;
}

.campaign-row h3,
.campaign-row p {
    margin: 0;
}

.campaign-row h3 {
    font-size: 1rem;
}

.campaign-row p {
    margin-top: 5px;
    font-size: 0.9rem;
    line-height: 1.45;
}

.campaign-score {
    display: grid;
    gap: 4px;
    justify-items: end;
}

.campaign-score span {
    color: var(--muted);
    font-size: 0.78rem;
}

.campaign-score strong {
    font-size: 1.45rem;
}

.two-column {
    display: grid;
    gap: 14px;
}

.form-panel {
    display: grid;
    gap: 14px;
}

label {
    display: grid;
    gap: 7px;
    color: var(--muted);
    font-weight: 800;
}

select,
textarea {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    color: var(--text);
    padding: 12px;
}

textarea {
    resize: vertical;
}

.insight-panel p {
    color: var(--muted);
    line-height: 1.6;
}

.studio-intro {
    display: grid;
    gap: 8px;
}

.studio-intro p,
.empty-state p,
.connection-card p {
    color: var(--muted);
    line-height: 1.6;
}

.mode-grid {
    display: grid;
    gap: 14px;
    margin-top: 14px;
}

.mode-card h2 {
    font-size: clamp(1.25rem, 4vw, 1.8rem);
    line-height: 1.12;
}

.checkbox-row {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface-soft);
    padding: 12px;
    color: var(--text);
    line-height: 1.45;
}

.checkbox-row input {
    width: 18px;
    min-height: 18px;
    margin-top: 2px;
}

.status-card strong {
    font-size: clamp(1.5rem, 4vw, 2.3rem);
    line-height: 1.05;
}

.status-grid .metric-card {
    min-height: 138px;
}

.setup-steps {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.setup-steps li {
    display: grid;
    gap: 5px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fbfcfd;
    padding: 13px;
}

.setup-steps span {
    color: var(--muted);
    line-height: 1.45;
}

.empty-state {
    display: grid;
    gap: 12px;
    justify-items: start;
    border: 1px dashed var(--line);
    border-radius: var(--radius);
    background: #fbfcfd;
    padding: 18px;
}

.empty-state h3 {
    margin: 0;
    font-size: 1.25rem;
}

.connection-card {
    display: grid;
    gap: 14px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    padding: 14px;
}

.connect-hero {
    display: grid;
    gap: 12px;
    margin-bottom: 14px;
}

.primary-connect-card {
    border-color: rgba(15, 118, 110, 0.22);
    background: linear-gradient(135deg, #ffffff 0%, #eef8f6 100%);
}

.primary-connect-card h3 {
    font-size: clamp(1.35rem, 4vw, 2rem);
}

.quick-steps {
    display: grid;
    gap: 10px;
}

.quick-steps article {
    display: flex;
    gap: 10px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    padding: 12px;
    color: var(--muted);
    font-weight: 800;
}

.quick-steps strong {
    display: grid;
    width: 28px;
    height: 28px;
    flex: 0 0 28px;
    place-items: center;
    border-radius: 50%;
    background: var(--brand);
    color: #fff;
}

.connect-actions {
    display: grid;
    gap: 8px;
    min-width: min(100%, 220px);
}

.connection-card h3,
.connection-card p {
    margin: 0;
}

.connection-card h3 {
    margin-bottom: 6px;
    font-size: 1.1rem;
}

.muted-card {
    background: #fbfcfd;
}

.disabled-action {
    cursor: not-allowed;
    opacity: 0.68;
}

.owner-setup {
    border-style: dashed;
}

.owner-setup > p {
    color: var(--muted);
    line-height: 1.6;
}

.clean-list {
    margin: 14px 0 0;
    padding-left: 18px;
    color: var(--text);
}

.clean-list li + li {
    margin-top: 8px;
}

.calendar-list article {
    display: grid;
    grid-template-columns: 48px 1fr auto;
    gap: 10px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 13px;
}

.mobile-tabbar {
    position: fixed;
    right: 12px;
    bottom: 12px;
    left: 12px;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
    z-index: 10;
}

.mobile-tabbar a {
    display: grid;
    gap: 3px;
    min-height: 58px;
    place-items: center;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 800;
}

.mobile-tabbar span {
    display: grid;
    width: 24px;
    height: 24px;
    place-items: center;
    border-radius: 8px;
    background: var(--surface-soft);
}

.mobile-tabbar a.active {
    color: var(--brand-dark);
}

.mobile-tabbar a.active span {
    background: var(--brand);
    color: white;
}

.login-body {
    display: grid;
    min-height: 100vh;
    place-items: center;
    padding: 18px;
    background:
        radial-gradient(circle at top left, rgba(15, 118, 110, 0.18), transparent 32rem),
        var(--bg);
}

.login-shell {
    width: min(100%, 460px);
}

.login-card {
    display: grid;
    gap: 22px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
    padding: 22px;
}

.login-brand {
    margin-bottom: 4px;
}

.login-card h1 {
    margin: 0;
    font-size: clamp(1.8rem, 7vw, 2.7rem);
    letter-spacing: 0;
}

.login-copy {
    margin: 8px 0 0;
    color: var(--muted);
    line-height: 1.55;
}

.login-form {
    display: grid;
    gap: 14px;
}

input {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    color: var(--text);
    padding: 12px;
    font: inherit;
}

.alert {
    border: 1px solid rgba(185, 28, 28, 0.25);
    border-radius: var(--radius);
    background: rgba(254, 226, 226, 0.8);
    color: #991b1b;
    padding: 12px;
    font-weight: 700;
}

.success-alert {
    border-color: rgba(15, 118, 110, 0.24);
    background: rgba(209, 250, 229, 0.82);
    color: var(--brand-dark);
}

.landing-body {
    background: var(--bg);
}

.landing-header {
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 18px 0;
}

.landing-nav {
    display: flex;
    gap: 14px;
    align-items: center;
    color: var(--muted);
    font-weight: 800;
}

.landing-hero,
.landing-section {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto 16px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.landing-hero {
    display: grid;
    gap: 22px;
    padding: clamp(22px, 5vw, 48px);
}

.landing-copy h1 {
    max-width: 780px;
    margin: 0;
    font-size: clamp(2.4rem, 10vw, 6rem);
    line-height: 0.94;
    letter-spacing: 0;
}

.landing-copy p {
    max-width: 680px;
    color: var(--muted);
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    line-height: 1.65;
}

.landing-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.landing-tags,
.platform-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.landing-tags span,
.platform-strip span {
    display: inline-flex;
    min-height: 34px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #fff;
    color: var(--muted);
    padding: 0 11px;
    font-size: 0.82rem;
    font-weight: 800;
}

.landing-preview {
    display: grid;
    gap: 12px;
    align-content: start;
    border-radius: var(--radius);
    background: var(--surface-soft);
    padding: 16px;
}

.preview-topline,
.preview-signal {
    display: grid;
    gap: 5px;
    border-radius: var(--radius);
    background: #fff;
    padding: 14px;
}

.preview-topline strong {
    font-size: 3rem;
    line-height: 1;
}

.preview-topline span,
.preview-signal span,
.preview-signal small {
    color: var(--muted);
}

.preview-signal small {
    color: var(--brand);
    font-weight: 800;
}

.landing-section {
    padding: clamp(20px, 4vw, 34px);
}

.landing-section h2 {
    max-width: 820px;
    margin: 0 0 18px;
    font-size: clamp(1.7rem, 5vw, 3.4rem);
    line-height: 1;
    letter-spacing: 0;
}

.landing-section p {
    color: var(--muted);
    line-height: 1.65;
}

.landing-grid {
    display: grid;
    gap: 12px;
}

.landing-grid article {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 16px;
}

.landing-grid h3,
.landing-grid p {
    margin: 0;
}

.landing-grid p {
    margin-top: 8px;
}

.split-section {
    display: grid;
    gap: 18px;
}

.workflow-list {
    display: grid;
    gap: 10px;
    margin: 0;
    padding-left: 22px;
    font-weight: 800;
}

.workflow-list li {
    padding-left: 4px;
}

.final-cta {
    display: grid;
    gap: 14px;
    justify-items: start;
}

.feature-list,
.faq-list {
    display: grid;
    gap: 10px;
}

.feature-list article,
.audience-card,
.faq-list details {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fbfcfd;
    padding: 14px;
}

.feature-list span {
    display: inline-flex;
    margin-bottom: 10px;
    color: var(--brand);
    font-size: 0.78rem;
    font-weight: 900;
}

.feature-list h3,
.feature-list p,
.audience-card h3,
.faq-list p {
    margin: 0;
}

.feature-list p,
.faq-list p {
    margin-top: 8px;
}

.audience-card ul {
    margin: 10px 0 0;
    padding-left: 18px;
    color: var(--muted);
    line-height: 1.5;
}

.audience-card li + li {
    margin-top: 7px;
}

.faq-list summary {
    cursor: pointer;
    font-weight: 900;
}

@media (min-width: 840px) {
    .app-shell {
        display: grid;
        grid-template-columns: 280px 1fr;
    }

    .sidebar {
        position: sticky;
        top: 0;
        display: block;
        height: 100vh;
        border-right: 1px solid var(--line);
        background: var(--surface);
        padding: 24px;
    }

    .brand {
        margin-bottom: 28px;
    }

    .brand span:last-child {
        display: grid;
        gap: 2px;
    }

    .nav-list {
        display: grid;
        gap: 8px;
    }

    .nav-item {
        display: flex;
        gap: 10px;
        align-items: center;
        border-radius: var(--radius);
        padding: 11px;
        color: var(--muted);
        font-weight: 800;
    }

    .nav-item.active {
        background: var(--surface-soft);
        color: var(--text);
    }

    .nav-icon {
        display: grid;
        width: 30px;
        height: 30px;
        place-items: center;
        border-radius: 8px;
        background: var(--surface-soft);
    }

    .nav-item.active .nav-icon {
        background: var(--brand);
        color: white;
    }

    .main {
        width: min(1180px, 100%);
        padding: 32px;
    }

    .mobile-tabbar {
        display: none;
    }

    .hero-panel {
        grid-template-columns: 1fr 260px;
        align-items: stretch;
        padding: 28px;
    }

    .signal-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .two-column {
        grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    }

    .mode-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .connection-card {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    .connect-actions {
        justify-self: end;
    }

    .landing-hero {
        grid-template-columns: minmax(0, 1fr) 340px;
        align-items: center;
    }

    .landing-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .feature-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .split-section {
        grid-template-columns: minmax(0, 1fr) minmax(320px, 0.85fr);
        align-items: center;
    }
}

@media (max-width: 520px) {
    body {
        background: #f7f9fb;
    }

    .landing-header {
        width: calc(100% - 24px);
        gap: 12px;
        align-items: stretch;
        flex-direction: column;
        padding: 12px 0;
    }

    .landing-nav {
        width: 100%;
        display: flex;
        gap: 8px;
        overflow-x: auto;
        padding-bottom: 3px;
        scrollbar-width: none;
    }

    .landing-nav a {
        min-width: max-content;
        min-height: 36px;
        display: inline-flex;
        align-items: center;
        border: 1px solid var(--line);
        border-radius: 999px;
        background: #fff;
        padding: 0 12px;
        font-size: 0.82rem;
    }

    .landing-nav .secondary-action {
        width: auto;
        background: var(--brand);
        color: #fff;
    }

    .landing-hero,
    .landing-section {
        width: calc(100% - 24px);
        margin-bottom: 12px;
        box-shadow: 0 12px 28px rgba(15, 23, 42, 0.06);
    }

    .landing-hero {
        gap: 16px;
        padding: 18px;
    }

    .landing-copy h1 {
        font-size: clamp(2.05rem, 13vw, 3.15rem);
        line-height: 0.98;
    }

    .landing-copy p {
        font-size: 0.98rem;
        line-height: 1.55;
    }

    .landing-actions {
        display: grid;
        gap: 8px;
    }

    .landing-preview {
        gap: 8px;
        padding: 10px;
    }

    .preview-topline,
    .preview-signal {
        padding: 11px;
    }

    .preview-topline strong {
        font-size: 2.25rem;
    }

    .landing-section {
        padding: 18px;
    }

    .landing-section h2 {
        font-size: clamp(1.5rem, 8vw, 2.15rem);
        line-height: 1.06;
        margin-bottom: 12px;
    }

    .landing-grid article {
        padding: 13px;
    }

    .workflow-list {
        gap: 9px;
        padding-left: 19px;
        font-size: 0.95rem;
    }

    .brand {
        gap: 10px;
    }

    .brand-mark {
        width: 38px;
        height: 38px;
    }

    .brand small {
        font-size: 0.74rem;
        line-height: 1.2;
    }

    .topbar {
        align-items: stretch;
        flex-direction: column;
    }

    .primary-action,
    .secondary-action {
        width: 100%;
    }

    .topbar-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

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

    .campaign-row {
        align-items: flex-start;
        flex-direction: column;
    }

    .campaign-score {
        width: 100%;
        grid-template-columns: 1fr auto;
        justify-items: start;
    }
}

@media (max-width: 640px) {
    .landing-body {
        background: #f6f8fb;
    }

    .landing-header {
        position: sticky;
        top: 0;
        z-index: 20;
        width: 100%;
        margin: 0;
        padding: 10px 12px;
        border-bottom: 1px solid var(--line);
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(14px);
    }

    .landing-header .brand {
        width: 100%;
        margin: 0;
    }

    .landing-header .brand span:last-child {
        min-width: 0;
    }

    .landing-header .brand strong {
        display: block;
        font-size: 1rem;
        line-height: 1.1;
    }

    .landing-header .brand small {
        display: block;
        max-width: 210px;
        overflow: hidden;
        color: var(--muted);
        font-size: 0.68rem;
        line-height: 1.15;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .landing-nav {
        display: flex;
        justify-content: flex-end;
        padding: 0;
    }

    .landing-nav a:not(.secondary-action) {
        display: none;
    }

    .landing-nav .secondary-action {
        min-height: 36px;
        border: 0;
        border-radius: 8px;
        padding: 0 12px;
        font-size: 0.82rem;
    }

    .landing-hero,
    .landing-section {
        width: 100%;
        margin: 0;
        border-right: 0;
        border-left: 0;
        border-radius: 0;
        box-shadow: none;
    }

    .landing-hero {
        gap: 18px;
        padding: 24px 16px 16px;
        background: linear-gradient(180deg, #ffffff 0%, #eef8f6 100%);
    }

    .landing-copy .eyebrow {
        margin-bottom: 10px;
        font-size: 0.68rem;
    }

    .landing-copy h1 {
        max-width: 360px;
        font-size: 2.28rem;
        line-height: 1.02;
    }

    .landing-copy p {
        margin: 14px 0 0;
        max-width: 360px;
        font-size: 0.98rem;
        line-height: 1.5;
    }

    .landing-actions {
        grid-template-columns: 1fr;
        margin-top: 16px;
    }

    .landing-actions .primary-action,
    .landing-actions .secondary-action,
    .final-cta .primary-action {
        min-height: 46px;
        width: 100%;
        border-radius: 8px;
    }

    .landing-preview {
        border: 1px solid rgba(15, 118, 110, 0.14);
        background: rgba(255, 255, 255, 0.78);
        padding: 10px;
    }

    .preview-topline {
        grid-template-columns: 1fr auto;
        align-items: center;
    }

    .preview-topline strong {
        font-size: 2rem;
    }

    .preview-signal {
        grid-template-columns: 1fr;
        gap: 3px;
    }

    .preview-signal b {
        font-size: 0.98rem;
    }

    .landing-section {
        margin-top: 10px;
        padding: 22px 16px;
        background: #fff;
    }

    .landing-section h2 {
        max-width: 360px;
        font-size: 1.62rem;
        line-height: 1.12;
    }

    .landing-section p {
        font-size: 0.96rem;
        line-height: 1.52;
    }

    .landing-grid {
        gap: 10px;
    }

    .landing-grid article {
        border-color: #e6edf2;
        background: #fbfcfd;
        padding: 14px;
    }

    .landing-grid h3 {
        font-size: 1rem;
    }

    .landing-grid p {
        font-size: 0.92rem;
        line-height: 1.45;
    }

    .split-section {
        gap: 14px;
    }

    .workflow-list {
        gap: 8px;
        border-radius: 8px;
        background: #f6f8fb;
        padding: 14px 14px 14px 32px;
        font-size: 0.92rem;
        line-height: 1.4;
    }

    .final-cta {
        padding-bottom: 30px;
    }
}