:root {
    --bg: #0a1020;
    --panel: #10192f;
    --panel-alt: #141f39;
    --surface: #f5f7fb;
    --text: #e8eefc;
    --muted: #a7b3d1;
    --line: rgba(255, 255, 255, 0.08);
    --accent: #73e0a9;
    --accent-strong: #5ac691;
    --accent-soft: rgba(115, 224, 169, 0.12);
    --shadow: 0 24px 80px rgba(6, 12, 26, 0.35);
    --radius: 24px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', 'Noto Sans SC', 'Noto Sans TC', 'PingFang SC', 'PingFang TC', 'Microsoft YaHei', 'Heiti SC', sans-serif;
    background: linear-gradient(180deg, #09111f 0%, #0f1730 40%, #f5f7fb 40%, #f5f7fb 100%);
    color: #0f172a;
}

body.dashboard-body {
    background: #09111f;
    color: var(--text);
}

.container {
    width: min(1180px, calc(100% - 48px));
    margin: 0 auto;
}

.legal-shell {
    min-height: 100vh;
    padding: 32px 0 64px;
}

.legal-brand {
    display: inline-block;
    margin-bottom: 24px;
    color: #e8eefc;
}

.legal-panel {
    max-width: 860px;
    padding: 32px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #10192f;
    color: var(--text);
    box-shadow: var(--shadow);
}

.legal-panel h1,
.legal-panel h2 {
    color: #ffffff;
}

.legal-panel h1 {
    margin: 0 0 16px;
    font-size: 2rem;
}

.legal-panel h2 {
    margin: 28px 0 10px;
    font-size: 1.05rem;
}

.legal-panel p {
    margin: 0 0 14px;
    color: var(--muted);
    line-height: 1.75;
}

.legal-panel a {
    color: var(--accent);
}

.hero-shell {
    color: var(--text);
    padding-bottom: 72px;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
}

.brand {
    color: inherit;
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.auth-link {
    font-weight: 700;
}

.user-chip {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.05);
    color: var(--text);
}

summary.user-chip {
    list-style: none;
    cursor: pointer;
}

summary.user-chip::after {
    content: '';
    width: 8px;
    height: 8px;
    margin-left: 6px;
    border-right: 2px solid var(--muted);
    border-bottom: 2px solid var(--muted);
    transform: rotate(45deg);
    flex: 0 0 auto;
}

summary.user-chip::-webkit-details-marker {
    display: none;
}

.account-menu[open] summary.user-chip::after {
    transform: rotate(-135deg);
    margin-top: 4px;
}

.user-chip strong,
.user-chip span {
    display: block;
}

.user-chip span:last-child {
    font-size: 0.8rem;
    color: var(--muted);
}

.user-chip-inline {
    margin-top: 12px;
}

.sidebar-user {
    margin-top: 20px;
    margin-bottom: 16px;
}

.account-menu {
    position: relative;
}

.account-menu-panel {
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    min-width: 240px;
    display: grid;
    gap: 8px;
    padding: 12px;
    border-radius: 16px;
    border: 1px solid var(--line);
    background: #10192f;
    box-shadow: var(--shadow);
    z-index: 20;
}

.sidebar-user .account-menu-panel {
    left: 0;
    right: auto;
}

.account-menu-panel a,
.account-menu-panel button {
    width: 100%;
    text-align: left;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text);
    font: inherit;
    text-decoration: none;
    cursor: pointer;
}

.account-menu-panel a:hover,
.account-menu-logout:hover {
    background: rgba(255,255,255,0.06);
}

.account-menu-disabled {
    opacity: 0.6;
    cursor: not-allowed !important;
}

.account-menu-panel small {
    padding: 0 12px;
    color: var(--muted);
}

.account-menu-panel form {
    margin: 0;
}

.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent);
    color: #04111e;
    font-weight: 800;
}

.locale-switcher {
    display: inline-flex;
    align-items: center;
}

.locale-switcher select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background: rgba(255,255,255,0.04);
    color: var(--text);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 10px 36px 10px 14px;
    font: inherit;
    cursor: pointer;
}

.locale-switcher-inline select {
    background: transparent;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.nav-links a,
.sidebar nav a,
.project-card a {
    color: inherit;
    text-decoration: none;
    opacity: 0.9;
}

.hero {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 32px;
    align-items: center;
    padding-top: 48px;
}

.eyebrow,
.section-tag {
    display: inline-flex;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.hero h1,
.dashboard-header h1,
.brief-page h1 {
    font-size: clamp(2.8rem, 6vw, 4.8rem);
    line-height: 1.05;
    margin: 16px 0;
}

.hero p,
.feature-grid p,
.workflow-grid p,
.dashboard-header p,
.brief-page p,
.panel p {
    color: var(--muted);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin: 28px 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 22px;
    border-radius: 14px;
    text-decoration: none;
    font-weight: 700;
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    color: #04111e;
}

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

.btn-secondary {
    color: var(--text);
    border-color: rgba(255,255,255,0.18);
    background: transparent;
}

.btn-disabled {
    opacity: 0.55;
    pointer-events: none;
}

.hero-metrics,
.score-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.hero-metrics div,
.score-grid div,
.project-card,
.stat-card,
.panel,
.sidebar,
.competitor-grid article,
.recommendation-card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero-metrics div,
.score-grid div {
    padding: 20px;
    background: rgba(255, 255, 255, 0.04);
}

.hero-metrics strong,
.score-grid strong {
    display: block;
    font-size: 1.8rem;
    margin-bottom: 6px;
}

.hero-card {
    display: grid;
    gap: 16px;
}

.stat-card,
.panel,
.sidebar,
.competitor-grid article,
.recommendation-card,
.project-card {
    background: var(--panel);
    padding: 24px;
    color: var(--text);
}

.stat-card.accent {
    background: linear-gradient(180deg, rgba(115,224,169,0.15), rgba(115,224,169,0.05));
}

.section {
    padding: 72px 0;
}

.feature-grid,
.workflow-grid,
.brief-layout,
.brief-two-column {
    display: grid;
    gap: 28px;
}

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

.feature-grid article {
    background: white;
    padding: 28px;
    border-radius: 24px;
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.08);
}

.feature-grid h2,
.workflow-grid h2,
.panel h2,
.brief-layout h2 {
    margin: 16px 0 12px;
    font-size: 1.7rem;
}

.section-dark {
    background: #0b1328;
    color: var(--text);
}

.workflow-grid {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: start;
}

.workflow-steps {
    display: grid;
    gap: 16px;
}

.workflow-steps div {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 16px;
    padding: 22px;
    background: rgba(255,255,255,0.04);
    border-radius: 20px;
    border: 1px solid var(--line);
}

.workflow-steps strong {
    font-size: 1.5rem;
    color: var(--accent);
}

.brief-layout,
.brief-two-column {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: start;
}

.brief-form {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    background: white;
    padding: 28px;
    border-radius: 24px;
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.08);
}

.brief-form label {
    display: grid;
    gap: 8px;
    grid-column: span 2;
    font-weight: 600;
    color: #0f172a;
}

.choice-grid > .choice-card,
.stacked-selects > label {
    grid-column: auto;
}

.brief-form input,
.brief-form select,
.brief-form textarea {
    width: 100%;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid rgba(15, 23, 42, 0.12);
    font: inherit;
}

.brief-form small {
    color: #d14343;
}

.selection-group {
    display: grid;
    gap: 12px;
    grid-column: 1 / -1;
    margin: 0;
    padding: 0;
    border: 0;
}

.field-third {
    grid-column: span 1;
}

.field-half {
    grid-column: span 2;
}

.field-two-thirds {
    grid-column: span 3;
}

.field-two-fifths {
    grid-column: span 2;
}

.full-width-field {
    grid-column: 1 / -1;
}

.force-full-row {
    grid-column: 1 / -1 !important;
}

.checkbox-row {
    display: flex !important;
    align-items: center;
    gap: 10px;
}

.checkbox-row input {
    width: auto;
}

.auth-page {
    color: var(--text);
}

.auth-shell {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 28px;
    align-items: start;
}

.auth-shell-signup {
    grid-template-columns: 0.8fr 1.2fr;
}

.auth-shell-single {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
}

.auth-locale-switcher {
    justify-self: end;
}

.auth-copy,
.auth-result {
    color: var(--text);
}

.auth-form {
    background: var(--panel);
    color: var(--text);
    border: 1px solid var(--line);
    grid-template-columns: 1fr;
    gap: 18px;
}

.auth-form label {
    grid-column: 1 / -1;
    color: var(--text);
}

.auth-form input {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--line);
    color: var(--text);
}

.auth-form h2,
.auth-form .auth-error,
.auth-form .auth-footnote,
.auth-form .auth-button,
.auth-form > button {
    grid-column: 1 / -1;
}

.auth-form .checkbox-row {
    grid-column: 1 / -1;
}

.auth-copy {
    display: grid;
    gap: 16px;
    align-content: start;
}

.auth-copy h1,
.auth-result h1 {
    margin: 0;
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    line-height: 1.1;
}

.auth-copy p,
.auth-result p {
    margin: 0;
}

.auth-footnote,
.panel-subsection p,
.auth-result p {
    color: var(--muted);
}

.auth-footnote a {
    color: var(--accent);
}

.auth-error {
    color: #ffb2b2;
    margin: 0;
}

.auth-button {
    width: 100%;
    margin-bottom: 18px;
}

.field-hint {
    margin: 0;
    font-size: 0.95rem;
    color: #5b677d;
}

.field-error {
    display: block;
    margin: 0;
    font-size: 0.9rem;
    color: #be123c;
}

.form-requirements-note {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(255,255,255,0.04);
}

.form-requirements-note p {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.field-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    width: 100%;
}

.field-label-row-compact {
    gap: 8px;
}

.requirement-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.requirement-badge-mandatory {
    color: #fff1f2;
    background: #be123c;
}

.requirement-badge-optional {
    color: #dbeafe;
    background: #1d4ed8;
}

.choice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.choice-grid-five-up {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.choice-grid-six-up {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

.brief-form-section {
    display: grid;
    gap: 20px;
    padding-top: 8px;
}

.brief-form-section + .brief-form-section {
    padding-top: 28px;
    border-top: 1px solid var(--line);
}

.brief-form-section-header {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
    align-items: start;
}

.brief-form-section-header h2 {
    margin: 0;
    font-size: 1.05rem;
}

.brief-form-section-header p {
    margin: 6px 0 0;
    color: var(--muted);
}

.brief-form-section-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 16px;
}

.stacked-select-group {
    gap: 14px;
}

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

.choice-card {
    display: grid;
    gap: 4px;
    padding: 8px 10px;
    border-radius: 12px;
    border: 1px solid rgba(15, 23, 42, 0.12);
    background: rgba(245, 247, 251, 0.9);
    align-content: start;
}

.choice-card input {
    width: auto;
    margin: 0;
}

.choice-name {
    font-size: 0.85rem;
    font-weight: 700;
    line-height: 1.25;
}

.choice-price {
    color: #0f5d3b;
    font-size: 0.76rem;
    font-weight: 600;
}

.project-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
}

.project-card {
    background: #0f1730;
}

.dashboard-shell {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
    padding: 32px 0;
}

.sidebar {
    position: sticky;
    top: 24px;
    height: fit-content;
}

.sidebar nav {
    display: grid;
    gap: 14px;
    margin-top: 24px;
}

.dashboard-main {
    display: grid;
    gap: 24px;
}

.dashboard-header,
.panel-heading,
.competitor-topline,
.brief-page-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: start;
}

.panel-heading {
    margin-bottom: 18px;
}

.panel table {
    width: 100%;
    border-collapse: collapse;
}

.panel th,
.panel td {
    text-align: left;
    padding: 14px 12px;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}

.card-grid,
.competitor-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.ai-provider-columns {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 24px;
    margin-top: 24px;
}

.ai-config-grid {
    margin-bottom: 24px;
}

.top-spaced {
    margin-top: 24px;
}

.full-width {
    grid-column: 1 / -1;
}

.stack {
    display: grid;
    gap: 16px;
}

.admin-edit-list {
    display: grid;
    gap: 12px;
}

.admin-page {
    color: var(--text);
    display: grid;
    gap: 24px;
}

.admin-header {
    margin-top: 32px;
}

.admin-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.admin-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.admin-content {
    display: grid;
    gap: 24px;
}

.admin-toc {
    position: sticky;
    top: 24px;
}

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

.admin-toc-nav a {
    display: block;
    padding: 10px 12px;
    border-radius: 10px;
    color: var(--text);
    text-decoration: none;
    background: rgba(255,255,255,0.03);
    border: 1px solid transparent;
}

.admin-toc-nav a:hover {
    border-color: var(--line);
    background: rgba(255,255,255,0.06);
}

.inline-form,
.admin-form-grid {
    display: grid;
    gap: 12px;
}

.inline-form {
    grid-template-columns: minmax(140px, 1fr) auto;
    align-items: center;
}

.admin-form-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

.admin-form-grid-wide {
    grid-template-columns: repeat(11, minmax(0, 1fr));
}

.admin-form-grid input,
.admin-form-grid select,
.admin-inline-input,
.inline-form select {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--line);
    color: var(--text);
    padding: 10px 12px;
    border-radius: 12px;
    font: inherit;
}

.admin-inline-input {
    width: 100%;
    min-width: 0;
}

.admin-actions-cell {
    display: grid;
    gap: 8px;
    min-width: 120px;
}

.admin-actions-cell-inline {
    grid-template-columns: repeat(2, max-content);
    align-items: start;
}

.admin-actions-cell form {
    margin: 0;
}

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

.admin-notice {
    color: var(--accent);
}

.admin-error {
    color: #ffb4b4;
}

.brief-page {
    color: var(--text);
}

.brief-page-wide {
    width: min(1880px, calc(100% - 32px));
}

.brief-page .brief-two-column {
    grid-template-columns: minmax(0, 1.7fr) minmax(320px, 0.8fr);
}

.brief-page .brief-form {
    background: var(--panel);
    color: var(--text);
    border: 1px solid var(--line);
}

.brief-submit {
    justify-self: start;
}

.brief-page .brief-form label {
    color: var(--text);
}

.brief-page .brief-form input,
.brief-page .brief-form select,
.brief-page .brief-form textarea {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--line);
    color: var(--text);
    padding: 10px 12px;
    border-radius: 12px;
    font-size: 0.95rem;
}

.brief-page .brief-form textarea {
    min-height: 96px;
}

.brief-page .brief-form-section-grid {
    gap: 12px;
}

.brief-page .choice-grid {
    gap: 8px;
}

.brief-page .field-hint {
    color: var(--muted);
}

.brief-page .form-requirements-note {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--line);
}

.brief-page .choice-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--line);
}

.brief-page .choice-price {
    color: var(--accent);
}

.brief-page .brief-form-section-header p {
    color: var(--muted);
}

.brief-output ul {
    padding-left: 18px;
    color: var(--muted);
}

.progress-dialog {
    width: min(420px, calc(100% - 32px));
    padding: 0;
    border: 0;
    border-radius: 16px;
    background: transparent;
    color: var(--text);
}

.progress-dialog::backdrop {
    background: rgba(4, 12, 24, 0.68);
    backdrop-filter: blur(4px);
}

.progress-dialog-card {
    display: grid;
    gap: 14px;
    justify-items: center;
    padding: 28px 24px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #10192f;
    box-shadow: var(--shadow);
    text-align: center;
}

.progress-dialog-title {
    margin: 0;
    font-size: 1.15rem;
}

.progress-dialog-body {
    margin: 0;
    color: var(--muted);
}

.progress-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255,255,255,0.16);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: progress-spin 0.8s linear infinite;
}

@keyframes progress-spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 980px) {
    .hero,
    .feature-grid,
    .workflow-grid,
    .brief-layout,
    .brief-two-column,
    .stacked-selects,
    .auth-shell,
    .dashboard-shell,
    .card-grid,
    .competitor-grid {
        grid-template-columns: 1fr;
    }

    .nav,
    .dashboard-header,
    .brief-page-header,
    .panel-heading {
        flex-direction: column;
    }

    .sidebar {
        position: static;
    }

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

    .admin-toc {
        position: static;
    }

    .brief-form label,
    .field-third,
    .field-half,
    .field-two-thirds,
    .field-two-fifths {
        grid-column: span 2;
    }

    .admin-form-grid,
    .admin-form-grid-wide,
    .inline-form {
        grid-template-columns: 1fr;
    }

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

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

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

@media (max-width: 720px) {
    .container {
        width: min(100% - 32px, 1180px);
    }

    .hero-metrics,
    .score-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
    }

    .brief-page-wide {
        width: min(100% - 24px, 1880px);
    }

    .brief-form {
        grid-template-columns: 1fr;
    }

    .brief-form-section-header,
    .brief-form-section-grid {
        grid-template-columns: 1fr;
    }

    .brief-form label,
    .selection-group,
    .field-third,
    .field-half,
    .field-two-thirds,
    .field-two-fifths,
    .full-width-field {
        grid-column: 1 / -1;
    }

    .choice-grid-five-up {
        grid-template-columns: 1fr;
    }

    .choice-grid-six-up {
        grid-template-columns: 1fr;
    }
}