:root {
    --color-white: #ffffff;
    --color-gray-900: #111827;
    --color-gray-700: #374151;
    --color-gray-500: #6b7280;
    --color-gray-400: #9ca3af;
    --color-gray-300: #d1d5db;
    --color-gray-200: #e5e7eb;
    --color-gray-100: #f3f4f6;
    --color-gray-50: #f9fafb;
    --color-accent: #2563eb;
    --color-gray-900-rgb: 17, 24, 39;
    --color-nav-bg: rgba(255, 255, 255, 0.85);
    --color-nav-border: rgba(241, 245, 249, 0.9);

    --container-padding-x: 48px;
    --label-col-width: 200px;
    --page-grid-gap: 40px;
    --page-grid-label-offset: 240px;
    --body-rail-shift: 110px;
    --btn-group-width: 331px;
    --body-text-max: 56rem;
    --hero-subtitle-max: 40rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Geist", sans-serif;
    background: var(--color-white);
    color: var(--color-gray-900);
    -webkit-font-smoothing: antialiased;
}

/* ---------- Layout ---------- */

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--container-padding-x);

    container-type: inline-size;
    --content-inner-width: calc(100cqw - var(--container-padding-x) * 2);
    --content-rail-start: calc((var(--content-inner-width) - var(--btn-group-width)) / 2);
}

.page-grid {
    display: grid;
    grid-template-columns: var(--label-col-width) 1fr;
    gap: var(--page-grid-gap);
    align-items: start;
    text-align: left;
}

.section {
    padding: 72px 0;
}

.section.about {
    padding-top: 52px;
    padding-bottom: 40px;
}

.section.philosophy {
    padding-top: 40px;
    padding-bottom: 72px;
}

section[id],
footer[id] {
    scroll-margin-top: 96px;
}

/* ---------- Animation ---------- */

.fade-up {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ---------- Navigation ---------- */

nav {
    position: sticky;
    top: 0;
    z-index: 100;

    width: 100%;

    background: var(--color-nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    border-bottom: 1px solid var(--color-nav-border);
}

.nav-inner {
    height: 80px;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;

    font-family: "Geist Mono", monospace;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.01em;
    text-decoration: none;
    color: var(--color-gray-900);
}

.logo-mark {
    display: block;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-toggle {
    display: inline-flex;
    align-items: center;
    padding: 3px;
    gap: 2px;

    border: 1px solid var(--color-gray-100);
    border-radius: 8px;
    background: var(--color-gray-50);
}

.lang-toggle__btn {
    appearance: none;
    margin: 0;
    padding: 6px 10px;

    border: none;
    border-radius: 6px;
    background: transparent;

    font-family: "Geist Mono", monospace;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    line-height: 1;
    color: var(--color-gray-500);

    cursor: pointer;
    transition: color 0.15s ease, background 0.15s ease;
}

.lang-toggle__btn:hover {
    color: var(--color-gray-900);
}

.lang-toggle__btn.is-active {
    background: var(--color-white);
    color: var(--color-gray-900);
    box-shadow: 0 1px 2px rgba(var(--color-gray-900-rgb), 0.06);
}

.lang-toggle__btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;

    list-style: none;
}

.nav-links > li {
    position: relative;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-gray-500);
    font-size: 14px;
    font-weight: 500;

    transition: color 0.2s;
}

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

.nav-links a.is-active,
.nav-links a.is-active:hover {
    color: var(--color-gray-900);
}

.nav-item--products .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.nav-submenu {
    position: absolute;
    top: calc(100% + 14px);
    left: 50%;
    transform: translateX(-50%) translateY(-4px);

    min-width: 236px;
    margin: 0;
    padding: 8px;

    list-style: none;

    background: var(--color-white);
    border: 1px solid var(--color-gray-100);
    border-radius: 10px;
    box-shadow: 0 14px 36px rgba(var(--color-gray-900-rgb), 0.08);

    opacity: 0;
    visibility: hidden;
    pointer-events: none;

    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
    z-index: 120;
}

.nav-submenu::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: -14px;
    height: 14px;
}

.nav-item--products:hover .nav-submenu,
.nav-item--products:focus-within .nav-submenu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.nav-submenu a {
    display: block;
    padding: 10px 12px;
    border-radius: 7px;
    white-space: nowrap;
    color: var(--color-gray-700);
}

.nav-submenu a:hover {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
}

.nav-submenu a.is-active {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    background: var(--color-gray-900);
    color: var(--color-white);
    text-decoration: none;

    border: none;

    padding: 10px 18px;

    border-radius: 8px;

    cursor: pointer;

    font-family: inherit;
    font-size: 14px;
    font-weight: 500;

    transition: background 0.2s;
}

.nav-cta:hover {
    background: var(--color-gray-700);
}

/* ---------- Hero ---------- */

.hero {
    position: relative;
    overflow: hidden;

    min-height: auto;

    display: flex;
    flex-direction: column;

    justify-content: flex-start;
    align-items: center;

    padding: 80px 0 48px;
}

.hero--product {
    padding-bottom: 24px;
}

.hero--product .hero-content h1 {
    margin-bottom: 0;
}

.hero-atmosphere {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;

    background:
        radial-gradient(ellipse 80% 55% at 50% -10%, rgba(37, 99, 235, 0.07), transparent 55%),
        radial-gradient(ellipse 60% 40% at 90% 30%, rgba(148, 163, 184, 0.12), transparent 50%),
        radial-gradient(ellipse 50% 35% at 10% 40%, rgba(226, 232, 240, 0.55), transparent 45%),
        linear-gradient(180deg, #f8fafc 0%, #ffffff 42%, #ffffff 100%);
}

.hero-content {
    position: relative;
    z-index: 1;

    text-align: center;
}

.hero h1 {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.035em;

    margin-bottom: 28px;
}

.hero-content > p {
    font-size: 18px;
    font-weight: 400;
    line-height: 1.65;
    color: var(--color-gray-500);

    max-width: var(--hero-subtitle-max);
    margin: 0 auto 44px;
}

.hero-visual,
.product-visual {
    position: relative;
    z-index: 1;

    width: 100%;
    max-width: 1080px;
    margin: 24px auto 48px;
    padding: 0 var(--container-padding-x);
}

.hero-mockup-img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--color-gray-200);
    box-shadow: 0 16px 48px rgba(var(--color-gray-900-rgb), 0.08);
}

/* CSS product UI mockup */
.ui-mock {
    border-radius: 12px;
    border: 1px solid var(--color-gray-200);
    background: var(--color-white);
    box-shadow: 0 16px 48px rgba(var(--color-gray-900-rgb), 0.08);
    overflow: hidden;
    text-align: left;
}

.ui-mock-chrome {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    background: var(--color-gray-50);
    border-bottom: 1px solid var(--color-gray-100);
}

.ui-mock-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-gray-300);
}

.ui-mock-dot:nth-child(1) { background: #fca5a5; }
.ui-mock-dot:nth-child(2) { background: #fcd34d; }
.ui-mock-dot:nth-child(3) { background: #86efac; }

.ui-mock-title {
    margin-left: 10px;
    font-family: "Geist Mono", monospace;
    font-size: 11px;
    font-weight: 500;
    color: var(--color-gray-400);
    letter-spacing: 0.02em;
}

.ui-mock-body {
    display: grid;
    grid-template-columns: 56px 1fr 200px;
    min-height: 280px;
}

.ui-mock-sidebar {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 18px 14px;
    border-right: 1px solid var(--color-gray-100);
    background: var(--color-gray-50);
}

.ui-mock-nav {
    display: block;
    height: 8px;
    border-radius: 4px;
    background: var(--color-gray-200);
}

.ui-mock-nav.is-active {
    background: var(--color-accent);
    opacity: 0.85;
}

.ui-mock-main {
    padding: 18px 20px 24px;
}

.ui-mock-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
}

.ui-mock-heading {
    display: block;
    width: 120px;
    height: 12px;
    border-radius: 4px;
    background: var(--color-gray-900);
    opacity: 0.75;
}

.ui-mock-pill {
    display: block;
    width: 72px;
    height: 22px;
    border-radius: 6px;
    background: var(--color-gray-900);
}

.ui-mock-table {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ui-mock-row {
    display: grid;
    grid-template-columns: 28px 1fr 0.7fr 56px;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-gray-100);
}

.ui-mock-row:last-child {
    border-bottom: none;
}

.ui-mock-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, #cbd5e1, #94a3b8);
}

.ui-mock-row:nth-child(2) .ui-mock-avatar {
    background: linear-gradient(135deg, #93c5fd, #60a5fa);
}

.ui-mock-row:nth-child(3) .ui-mock-avatar {
    background: linear-gradient(135deg, #7dd3fc, #38bdf8);
}

.ui-mock-row:nth-child(4) .ui-mock-avatar {
    background: linear-gradient(135deg, #99f6e4, #5eead4);
}

.ui-mock-line {
    display: block;
    height: 8px;
    border-radius: 4px;
    background: var(--color-gray-200);
}

.ui-mock-line--lg { width: 78%; }
.ui-mock-line--md { width: 64%; }
.ui-mock-line--sm { width: 55%; }
.ui-mock-line--half { width: 48%; }
.ui-mock-line--full { width: 100%; }

.ui-mock-badge {
    display: block;
    height: 18px;
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.12);
}

.ui-mock-badge--muted {
    background: var(--color-gray-100);
}

.ui-mock-panel {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 22px 18px;
    border-left: 1px solid var(--color-gray-100);
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.ui-mock-panel-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    margin-bottom: 4px;
    background: linear-gradient(135deg, #60a5fa, #2563eb);
}

.ui-mock-divider {
    display: block;
    width: 100%;
    height: 1px;
    margin: 6px 0;
    background: var(--color-gray-100);
}

@media (min-width: 901px) {
    .hero h1 br {
        display: none;
    }

    .hero-content > p br {
        display: none;
    }

    .hero-content > p {
        max-width: none;
    }

    .hero-buttons {
        width: var(--btn-group-width);
        margin-left: var(--content-rail-start);
        margin-right: auto;
        justify-content: flex-start;
    }

    .about-body,
    .who-body,
    .philosophy-steps,
    .footer-body {
        max-width: min(var(--body-text-max), 100%);
        margin-left: 0;
        margin-right: 0;
    }

    .ui-mock-body {
        grid-template-columns: 64px 1fr 220px;
        min-height: 320px;
    }
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 14px;
}

/* Product snapshot (legacy spacing helper if reused) */
.product-snapshot {
    padding-top: 64px;
    padding-bottom: 32px;
    border-top: 1px solid var(--color-gray-100);
}

.hero-trust {
    margin-top: 48px;
}

.hero-trust-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-gray-500);
    letter-spacing: 0.01em;

    margin-bottom: 20px;
}

.trust-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 32px;

    list-style: none;
}

.trust-logos li {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: -0.01em;
    color: var(--color-gray-500);
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    padding: 14px 24px;

    border-radius: 8px;

    cursor: pointer;

    font-family: inherit;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;

    transition:
        background 0.25s ease,
        transform 0.25s ease,
        box-shadow 0.25s ease,
        border-color 0.25s ease;
}

.btn-primary {
    background: var(--color-gray-900);
    color: var(--color-white);
    border: none;
}

.btn-primary:hover {
    background: var(--color-gray-700);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(var(--color-gray-900-rgb), 0.12);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-gray-900);
    border: 1px solid var(--color-gray-200);
}

.btn-secondary:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-300);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}

.btn-secondary:active {
    transform: translateY(0);
    box-shadow: none;
}

/* ---------- Mono labels ---------- */

.mono-label,
.about-title,
.who-title,
.philosophy-title,
.philosophy-step h3,
.footer-label {
    font-family: "Geist Mono", monospace;
    font-size: 17px;
    font-weight: 500;
    line-height: 1.7;
    letter-spacing: 0;
    color: var(--color-gray-500);
}

.mono-label::before,
.about-title::before,
.who-title::before,
.philosophy-title::before,
.philosophy-step h3::before,
.footer-label::before {
    content: "> ";
}

/* ---------- About ---------- */

.about-title,
.who-title {
    padding-top: 1px;
}

.about-body p,
.who-body p {
    font-size: 18px;
    line-height: 1.625;
    letter-spacing: -0.015em;
    color: var(--color-gray-500);
}

.about-body p + p {
    margin-top: 22px;
}

.brand-visual {
    display: block;
    width: 100%;
    max-width: 480px;
    height: auto;
    margin-bottom: 28px;
    border-radius: 12px;
}

.brand-visual--name {
    max-width: 560px;
    margin-bottom: 22px;
}

.brand-lockups {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 16px;
}

.brand-visual--lockup {
    max-width: 300px;
    margin-bottom: 0;
}

/* ---------- Philosophy ---------- */

.philosophy-title {
    padding-top: 1px;
}

.philosophy-step {
    padding: 28px 0;
}

.philosophy-step:first-child {
    padding-top: 1px;
}

.philosophy-step h3 {
    margin-bottom: 6px;
}

.philosophy-step p {
    font-size: 17px;
    line-height: 1.625;
    letter-spacing: -0.01em;
    color: var(--color-gray-500);
}

.philosophy-step p + p {
    margin-top: 14px;
}

.step-visual {
    display: block;
    width: 96px;
    height: 96px;
    margin-bottom: 20px;
}

.text-link {
    font-weight: 500;
    color: var(--color-gray-900);
    text-decoration: none;
    transition: color 0.2s;
}

.text-link:hover {
    color: var(--color-accent);
}

.text-link--prominent {
    font-size: 19px;
}

.philosophy-divider {
    display: flex;
    align-items: center;
    padding: 2px 0;

    border-top: 1px solid var(--color-gray-100);
}

.philosophy-divider span {
    font-size: 13px;
    color: var(--color-gray-400);
    line-height: 1;

    padding-top: 14px;
}

/* ---------- Footer ---------- */

.site-footer {
    padding: 72px 0 96px;

    border-top: 1px solid var(--color-gray-100);
}

.footer-label {
    padding-top: 1px;
}

.footer-body p {
    font-size: 19px;
    line-height: 1.625;
    letter-spacing: -0.015em;
    color: var(--color-gray-500);

    margin-bottom: 12px;
}

.footer-body a {
    font-size: 17px;
    font-weight: 500;
    color: var(--color-gray-900);
    text-decoration: none;

    transition: color 0.2s;
}

.footer-body a:hover {
    color: var(--color-accent);
}

.footer-legal {
    margin-top: 56px;
    padding-top: 28px;

    border-top: 1px solid var(--color-gray-100);
}

.footer-legal-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-copyright {
    font-size: 13px;
    color: var(--color-gray-400);
}

.footer-legal-links {
    display: flex;
    gap: 24px;

    list-style: none;
}

.footer-legal-links a {
    font-size: 13px;
    color: var(--color-gray-500);
    text-decoration: none;

    transition: color 0.2s;
}

.footer-legal-links a:hover {
    color: var(--color-accent);
}

.footer-company {
    margin-top: 16px;

    font-size: 12px;
    line-height: 1.6;
    color: var(--color-gray-400);
}

/* ---------- Legal pages ---------- */

.hero-content .legal-meta {
    font-size: 14px;
    color: var(--color-gray-400);

    max-width: none;
    margin: -24px auto 0;
}

.legal-lang-divider {
    padding-top: 8px;
}

.legal-lang-divider hr {
    border: none;
    border-top: 1px solid var(--color-gray-100);
}

.about-body .legal-note {
    font-size: 14px;
    color: var(--color-gray-400);
}

.about-body ul {
    margin: 10px 0 0;
    padding-left: 18px;
}

.about-body li {
    font-size: 18px;
    line-height: 1.625;
    letter-spacing: -0.015em;
    color: var(--color-gray-500);
}

.about-body li + li {
    margin-top: 6px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 32px;
        --container-padding-x: 32px;
    }

    .page-grid {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    .about-body,
    .who-body,
    .philosophy-steps,
    .footer-body {
        max-width: none;
        margin: 0;
    }

    .section {
        padding: 64px 0;
    }

    .section.about {
        padding-top: 44px;
        padding-bottom: 32px;
    }

    .section.philosophy {
        padding-top: 32px;
        padding-bottom: 64px;
    }

    .hero {
        min-height: auto;
        padding: 64px 0 40px;
    }

    .hero--product {
        padding-bottom: 16px;
    }

    .hero h1 {
        font-size: 44px;
    }

    .hero-content > p {
        font-size: 17px;
    }

    .hero-visual,
    .product-visual {
        margin-top: 16px;
        margin-bottom: 40px;
        padding: 0 16px;
    }

    .ui-mock-body {
        grid-template-columns: 44px 1fr;
        min-height: 220px;
    }

    .ui-mock-panel {
        display: none;
    }

    .ui-mock-row {
        grid-template-columns: 24px 1fr 48px;
        gap: 8px;
    }

    .ui-mock-row .ui-mock-line--sm {
        display: none;
    }

    .product-snapshot {
        padding-top: 48px;
        padding-bottom: 24px;
    }

    .hero-trust {
        margin-top: 40px;
    }

    .trust-logos {
        gap: 24px;
    }

    .trust-logos li {
        font-size: 13px;
    }

    .about-body p,
    .who-body p {
        font-size: 17px;
        line-height: 1.625;
    }

    .philosophy-step {
        padding: 24px 0;
    }

    .philosophy-step p {
        font-size: 16px;
    }

    .site-footer {
        padding: 64px 0 80px;
    }

    .footer-body p {
        font-size: 17px;
    }

    .footer-legal-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

    .footer-legal-links {
        gap: 20px;
    }
}

@media (max-width: 900px) and (min-width: 769px) {
    .page-grid {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }

    .about-body,
    .who-body,
    .philosophy-steps,
    .footer-body {
        max-width: none;
        margin: 0;
    }
}