:root {
    --bg: #f3f6fb;
    --surface: #ffffff;
    --text: #0f172a;
    --muted: #5b6b80;
    --primary: #1148b6;
    --primary-600: #0e3f9f;
    --primary-700: #0c3588;
    --accent: #0f9a8a;
    --accent-600: #0b7e71;
    --border: #dce3ec;
    --shadow: 0 10px 24px rgba(15, 23, 42, 0.07);
    --radius: 12px;
    --radius-lg: 16px;
    --container-max: 1060px;
    --space-1: 6px;
    --space-2: 10px;
    --space-3: 16px;
    --space-4: 24px;
    --space-5: 32px;
    --space-6: 48px;
    --input-bg: #ffffff;
    --input-border: #c7d2e3;
    --input-border-hover: #aebed6;
    --input-border-focus: #0f9a8a;
    --input-text: #0f172a;
    --input-placeholder: #8092aa;
    --focus-ring: rgba(15, 154, 138, 0.24);
}

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

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.62;
}

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

a:hover {
    color: var(--primary-600);
    text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid rgba(15, 154, 138, 0.32);
    outline-offset: 2px;
}

h1,
h2,
h3 {
    color: var(--text);
    line-height: 1.24;
    margin-top: 0;
}

h1 {
    font-size: clamp(2.05rem, 4vw, 2.95rem);
    margin-bottom: 0.58rem;
}

h2 {
    font-size: clamp(1.42rem, 2.4vw, 1.9rem);
    margin-bottom: 0.45rem;
}

h3 {
    font-size: 1.16rem;
}

small {
    color: var(--muted);
    font-size: 0.86rem;
}

.container {
    width: min(100%, var(--container-max));
    margin-inline: auto;
    padding-inline: 20px;
}

.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 70;
}

.topbar-inner {
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    padding-block: 8px;
}

.brand {
    color: var(--text);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.18rem;
    letter-spacing: 0.01em;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: 0;
}

.brand-logo {
    width: 72px;
    height: 72px;
    border-radius: 8px;
    object-fit: contain;
}

.brand:hover {
    color: var(--text);
    text-decoration: none;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    flex-wrap: wrap;
}

.nav a {
    color: #2a3951;
    text-decoration: none;
    font-weight: 600;
    padding: 8px 10px;
    border-bottom: 2px solid transparent;
    border-radius: 8px;
    line-height: 1;
}

.nav a:hover {
    color: var(--primary);
    text-decoration: none;
    background: rgba(17, 72, 182, 0.06);
}

.nav a.is-active {
    color: #12233f;
    border-bottom-color: var(--primary);
    background: transparent;
}

.main-shell {
    padding-block: var(--space-5) 120px;
}

.footer {
    background: #111827;
    color: #d7deea;
    padding-top: var(--space-6);
    margin-top: var(--space-5);
}

.footer-grid {
    display: grid;
    gap: var(--space-4);
    grid-template-columns: 1fr;
}

.footer-col h3 {
    color: #f5f8ff;
    font-size: 1rem;
    margin-bottom: var(--space-2);
}

.footer-col p {
    margin: 0;
    color: #b6c0d3;
}

.footer-col ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.footer-col li + li {
    margin-top: var(--space-2);
}

.footer a {
    color: #dce8ff;
    text-decoration: none;
}

.footer a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.footer-bottom {
    margin-top: var(--space-4);
    border-top: 1px solid rgba(220, 232, 255, 0.2);
    padding: var(--space-3) 0 var(--space-4);
    color: #b6c0d3;
    font-size: 0.9rem;
}

.hero {
    background: linear-gradient(165deg, #f8fbff 0%, #eef4ff 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: var(--space-5) var(--space-4);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
}

.hero-title {
    margin-bottom: 0.5rem;
}

.hero-text {
    color: var(--muted);
    font-size: 1.06rem;
    margin-bottom: var(--space-3);
    max-width: 62ch;
}

.hero-actions {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.trust-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-3);
}

.trust-card h3 {
    margin-bottom: 8px;
}

.trust-card ul {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
}

.section {
    margin-top: var(--space-5);
}

.section-title {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.grid {
    display: grid;
    gap: var(--space-3);
}

.grid-2 {
    grid-template-columns: 1fr;
}

.grid-3 {
    grid-template-columns: 1fr;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: var(--space-3);
}

.card:hover {
    border-color: #c6d3e4;
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.09);
}

.card-title {
    margin-bottom: var(--space-2);
}

.card-text {
    color: var(--muted);
    margin-bottom: var(--space-3);
}

.card-meta {
    color: var(--muted);
    font-size: 0.9rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    border: 1px solid transparent;
    text-decoration: none;
    font-weight: 600;
    padding: 10px 14px;
    cursor: pointer;
    transition: 0.16s ease;
    transition-property: background-color, border-color, color, transform, box-shadow;
}

.btn:hover {
    transform: translateY(-1px);
    text-decoration: none;
}

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

.btn:focus-visible {
    box-shadow: 0 0 0 3px rgba(15, 154, 138, 0.3);
}

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

.btn-primary:hover {
    background: var(--primary-600);
    border-color: var(--primary-600);
    color: #fff;
    box-shadow: 0 8px 18px rgba(17, 72, 182, 0.22);
}

.btn-ghost {
    background: var(--surface);
    border-color: var(--border);
    color: #21334f;
}

.btn-ghost:hover {
    background: #f8fbff;
    border-color: #c8d5e8;
}

.btn-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--primary-600);
    font-weight: 600;
    padding: 4px 0;
}

.btn-sm {
    min-height: 36px;
    padding: 7px 11px;
    font-size: 0.9rem;
}

.btn-link:hover {
    color: var(--primary-700);
}

.link-inline {
    text-decoration: underline;
    text-decoration-color: rgba(17, 72, 182, 0.4);
    text-underline-offset: 2px;
}

.link-inline:hover {
    color: var(--primary-700);
    text-decoration-color: rgba(12, 53, 136, 0.55);
}

.toolbar {
    display: grid;
    gap: var(--space-2);
}

.toolbar-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2);
    align-items: end;
}

.form {
    display: grid;
    gap: var(--space-3);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
    align-items: start;
}

.field {
    display: grid;
    gap: var(--space-1);
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding-top: 4px;
}

.label {
    display: inline-block;
    font-weight: 600;
    margin-bottom: 6px;
}

.input,
.select {
    width: 100%;
    min-height: 45px;
    border: 1px solid var(--input-border);
    border-radius: var(--radius);
    background: var(--input-bg);
    padding: 12px 14px;
    color: var(--input-text);
    font: inherit;
}

.input::placeholder {
    color: var(--input-placeholder);
}

.input:hover,
.select:hover {
    border-color: var(--input-border-hover);
}

.input:focus-visible,
.select:focus-visible {
    border-color: var(--input-border-focus);
    box-shadow: 0 0 0 3px var(--focus-ring);
}

.input[readonly],
.input:disabled,
.select:disabled {
    background: #f2f5fa;
    color: #66778f;
    cursor: not-allowed;
}

.help {
    margin-top: var(--space-1);
    color: var(--muted);
    font-size: 0.9rem;
}

.alert {
    border-radius: var(--radius);
    padding: 12px 14px;
    border: 1px solid transparent;
    margin: var(--space-3) 0;
}

.alert-error {
    border-color: #f1b6b6;
    background: #fff2f2;
    color: #912d2d;
}

.alert-info {
    border-color: #b9dfdb;
    background: #ecfbf9;
    color: #0f6f64;
}

.result-box {
    background: #f8fbff;
    border: 1px solid #d0dff3;
    border-top: 4px solid rgba(15, 154, 138, 0.38);
    border-radius: var(--radius);
    padding: var(--space-4);
}

.result-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.badge {
    display: inline-flex;
    align-items: center;
    border: 1px solid #b6d8d3;
    background: #ecfbf9;
    color: #116d62;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 3px 9px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    gap: var(--space-2);
    padding: 11px 0;
    border-top: 1px dashed #d0dbeb;
}

.result-value {
    font-weight: 700;
    font-size: 1.2rem;
}

.result-value-emphasis {
    font-weight: 800;
    font-size: 1.3rem;
}

.result-unit {
    color: var(--muted);
    font-weight: 500;
}

.result-label {
    color: var(--muted);
}

.result-row:first-of-type {
    border-top: 0;
}

.layout-tool {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

.sidebar-stack > * + * {
    margin-top: 0;
}

.sidebar-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.sidebar-card-title {
    font-size: 1.03rem;
    margin: 0;
}

.compact-list {
    display: grid;
    gap: var(--space-1);
    line-height: 1.35;
}

.compact-list a {
    color: #24364f;
}

.compact-list a:hover {
    color: var(--primary);
    text-decoration: none;
}

.share-bar {
    padding: var(--space-2) var(--space-3);
}

.share-bar .label {
    font-size: 0.85rem;
    color: var(--muted);
}

.share-row {
    display: grid;
    gap: var(--space-2);
    grid-template-columns: 1fr auto;
    align-items: center;
}

.share-input {
    background: #f6f9ff;
}

.prose {
    max-width: 70ch;
    line-height: 1.7;
}

.article {
    max-width: 70ch;
}

.prose p,
.prose ul,
.prose ol {
    margin-bottom: var(--space-3);
}

.prose h2 {
    margin-top: var(--space-5);
    margin-bottom: var(--space-2);
}

.prose ul,
.prose ol {
    padding-left: 1.25rem;
}

.ad-slot {
    min-height: var(--ad-height, 160px);
    max-width: var(--ad-max-width, 100%);
    width: 100%;
    margin: var(--space-4) auto;
    border: 1px dashed #d5deeb;
    border-radius: 10px;
    background: #f6f8fc;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-inline {
    grid-column: 1 / -1;
}

.ad-desktop-only {
    display: none;
}

.ad-mobile-only {
    display: block;
}

.ad-slot-label {
    color: #91a0b3;
    font-size: 0.73rem;
}

.consent-banner {
    position: fixed;
    inset: auto 0 0 0;
    z-index: 80;
    background: rgba(15, 23, 42, 0.97);
    color: #fff;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.consent-inner {
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    padding-block: var(--space-1);
    font-size: 0.92rem;
}

.consent-actions {
    display: flex;
    gap: var(--space-1);
    flex-shrink: 0;
}

.btn-consent {
    padding: 6px 10px;
}

.btn-consent-muted {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.45);
    color: #fff;
}

.btn-consent-muted:hover {
    background: rgba(255, 255, 255, 0.1);
}

@media (min-width: 720px) {
    .toolbar-row {
        grid-template-columns: 1fr auto auto;
    }

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

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

    .ad-desktop-only {
        display: block;
    }

    .ad-mobile-only {
        display: none;
    }
}

@media (min-width: 900px) {
    .hero-grid {
        grid-template-columns: 1.4fr 1fr;
        align-items: start;
    }

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

    .layout-tool {
        grid-template-columns: minmax(0, 1.7fr) minmax(260px, 1fr);
        align-items: start;
    }

    .footer-grid {
        grid-template-columns: 1.3fr 1fr 1fr 1.2fr;
    }
}

@media (max-width: 719px) {
    .topbar-inner {
        min-height: 58px;
    }

    .brand {
        font-size: 1.06rem;
    }

    .brand-logo {
        width: 72px;
        height: 72px;
    }

    .nav {
        gap: 6px;
    }

    .nav a {
        padding: 7px 8px;
        font-size: 0.95rem;
    }

    .main-shell {
        padding-top: 20px;
        padding-bottom: 98px;
    }

    .share-row {
        grid-template-columns: 1fr;
    }

    .consent-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}