:root {
    --color-bg: #f8f9fb;
    --color-surface: #ffffff;
    --color-text: #1a1d26;
    --color-muted: #5c6478;
    --color-border: #e2e6ef;
    --color-primary: #2d3a8c;
    --color-primary-hover: #1f2a6b;
    --color-error: #b42318;
    --color-error-bg: #fef3f2;
    --color-success: #067647;
    --color-success-bg: #ecfdf3;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.04);
    --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

body {
    margin: 0;
    font-family: var(--font);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.5;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    width: min(1100px, 92vw);
    margin: 0 auto;
}

.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 5.5rem;
    gap: 1rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    gap: 0.5rem;
    line-height: 0;
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--color-text);
    text-decoration: none;
}

.brand:hover {
    opacity: 0.9;
    text-decoration: none;
}

.brand__logo {
    display: block;
    height: calc(5.5rem - 1.125rem);
    width: auto;
    aspect-ratio: 3 / 2;
    object-fit: contain;
    object-position: left center;
}

.layout-public .brand__logo,
.layout-app .brand__logo,
.layout-guest .brand__logo {
    mix-blend-mode: lighten;
}

.admin-header .brand__logo {
    mix-blend-mode: normal;
    filter: brightness(1.15) contrast(1.05);
}

.brand__logo--footer {
    height: 2.625rem;
}

.badge {
    display: inline-block;
    margin-left: 0.5rem;
    padding: 0.15rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    background: #eef1ff;
    border-radius: 999px;
    vertical-align: middle;
}

.nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav a {
    color: var(--color-muted);
    font-weight: 500;
}

.nav a:hover {
    color: var(--color-text);
}

.main-content {
    padding: 2.5rem 0 4rem;
}

.site-footer {
    padding: 1.5rem 0 2rem;
    color: var(--color-muted);
    font-size: 0.875rem;
}

.hero {
    max-width: 640px;
    padding: 3rem 0;
}

.hero h1 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    line-height: 1.15;
    margin: 0 0 1rem;
}

.lead {
    font-size: 1.125rem;
    color: var(--color-muted);
    margin: 0 0 2rem;
}

.actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.auth-card {
    max-width: 440px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.auth-card h1,
.page-header h1 {
    margin: 0 0 0.5rem;
    font-size: 1.75rem;
}

.subtitle {
    color: var(--color-muted);
    margin: 0 0 1.5rem;
}

.form {
    display: grid;
    gap: 1rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    display: grid;
    gap: 0.375rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font: inherit;
    background: #fff;
}

.form-group input:focus {
    outline: 2px solid rgba(45, 58, 140, 0.25);
    border-color: var(--color-primary);
}

.hint {
    color: var(--color-muted);
    font-size: 0.8125rem;
}

.form-footer {
    margin-top: 1.25rem;
    text-align: center;
    color: var(--color-muted);
    font-size: 0.9375rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1rem;
    border-radius: 8px;
    border: 1px solid transparent;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-hover);
    text-decoration: none;
}

.btn-secondary {
    background: #fff;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-ghost {
    background: transparent;
    color: var(--color-muted);
    border: none;
    padding: 0.375rem 0.5rem;
}

.btn-sm {
    padding: 0.45rem 0.85rem;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
}

.inline-form {
    display: inline;
    margin: 0;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9375rem;
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid #fecdca;
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid #abefc6;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.card h2 {
    margin: 0 0 1rem;
    font-size: 1.125rem;
}

.card-muted p {
    color: var(--color-muted);
    margin: 0;
}

.detail-list {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.5rem 1.5rem;
    margin: 0;
}

.detail-list dt {
    color: var(--color-muted);
    font-weight: 600;
}

.detail-list dd {
    margin: 0;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.1;
}

.stat-label {
    color: var(--color-muted);
    font-size: 0.875rem;
}

.error-page {
    max-width: 480px;
    margin: 4rem auto;
    text-align: center;
}

.error-page h1 {
    font-size: 4rem;
    margin: 0 0 0.5rem;
}

.error-detail {
    text-align: left;
    background: #111;
    color: #eee;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.8125rem;
}

.admin-header {
    background: #111827;
    border-bottom-color: #1f2937;
}

.admin-header .brand,
.admin-header .nav a,
.admin-header .btn-ghost {
    color: #e5e7eb;
}

.layout-admin {
    background: #f3f4f6;
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: flex-end;
    }

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

.page-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.page-header-row h1 {
    margin: 0;
}

.page-header-row .subtitle {
    margin: 0.25rem 0 0;
}

.form-card {
    max-width: 640px;
}

.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font: inherit;
    background: #fff;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
}

.card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.25rem;
}

.text-muted {
    color: var(--color-muted);
    margin: 0;
}

.table-wrap {
    overflow-x: auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

.data-table th,
.data-table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.data-table th {
    background: #f9fafb;
    font-weight: 600;
    color: var(--color-muted);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.table-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    align-items: center;
}

.badge-status {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: capitalize;
    background: #eef1ff;
    color: var(--color-primary);
}

.badge-invited { background: #fef3c7; color: #92400e; }
.badge-accepted, .badge-active { background: var(--color-success-bg); color: var(--color-success); }
.badge-declined, .badge-inactive { background: #f3f4f6; color: #6b7280; }
.badge-removed, .badge-archived { background: var(--color-error-bg); color: var(--color-error); }
.badge-draft, .badge-pending { background: #fef3c7; color: #92400e; }
.badge-released { background: #dbeafe; color: #1e40af; }

.activity-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.activity-list li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.625rem 0;
    border-bottom: 1px solid var(--color-border);
}

.activity-list li:last-child {
    border-bottom: none;
}

.activity-action {
    font-weight: 500;
}

.activity-meta {
    color: var(--color-muted);
    font-size: 0.8125rem;
    white-space: nowrap;
}

.link-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.link-list li {
    padding: 0.375rem 0;
}

.vault-content {
    background: #f9fafb;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1rem;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 0.875rem;
    margin: 0;
}

.admin-note {
    margin-top: 1rem;
}

/* Phase 4: Public marketing pages */
.layout-public .main-content {
    padding-bottom: 3rem;
}

.hero-large {
    background: linear-gradient(135deg, #eef1ff 0%, #f8f9fb 60%);
    padding: 4rem 0;
    margin-bottom: 2rem;
}

.hero-large h1 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    margin-bottom: 0.75rem;
}

.page-hero {
    padding: 2.5rem 0 1rem;
}

.page-hero h1 {
    margin-bottom: 0.5rem;
}

.lead {
    font-size: 1.125rem;
    color: var(--color-muted);
    max-width: 42rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
}

.feature-list {
    display: grid;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.feature-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
}

.cta-band {
    background: var(--color-primary);
    color: #fff;
    padding: 2.5rem 0;
    margin-top: 2rem;
}

.cta-band a {
    color: #fff;
}

.cta-inner {
    text-align: center;
}

.cta-inner h2 {
    margin-top: 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.pricing-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
}

.pricing-card-current {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(45, 58, 140, 0.15);
}

.pricing-card .price {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0.5rem 0 1rem;
}

.plan-features {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
    font-size: 0.9375rem;
    color: var(--color-muted);
}

.plan-features li {
    padding: 0.25rem 0;
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

.public-nav {
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
}

.public-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.5rem;
    padding: 1.5rem 0;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.footer-links a {
    color: var(--color-muted);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: 1rem 0;
    color: var(--color-muted);
    font-size: 0.875rem;
}

.faq-list {
    max-width: 720px;
}

.faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    margin-bottom: 0.75rem;
}

.faq-item summary {
    cursor: pointer;
    font-weight: 600;
}

.muted-note {
    color: var(--color-muted);
    font-size: 0.9375rem;
    margin-bottom: 2rem;
}

.billing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.plan-name {
    font-size: 1.125rem;
    font-weight: 600;
}

.usage-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.usage-list li {
    padding: 0.35rem 0;
}

.referral-box {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0;
}

.referral-input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.875rem;
}

.upgrade-note {
    font-size: 0.875rem;
    margin-top: 1.5rem;
}

.form-card {
    max-width: 520px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
}