/* ============================================================
   Landing page.

   Imports the design tokens so the page and the measurement window
   look like one product. Its own class names are prefixed `lp-`,
   so nothing here can collide with the `ssm-` measurement module.
   ============================================================ */

@import "./base.css";


html {
    scroll-behavior: smooth;

    /* A sticky header would otherwise cover the heading it jumps to. */
    scroll-padding-top: 84px;
}


@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}


body {
    background: var(--ssm-color-surface);
}


.lp-container {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 var(--ssm-space-lg);
}


.lp-container--narrow {
    max-width: 760px;
}


/* Visible only when tabbed to - lets keyboard users skip the navigation. */
.lp-skip {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 100;
    padding: 12px 20px;
    background: var(--ssm-color-accent);
    color: #fff;
    border-radius: 0 0 var(--ssm-radius-sm) 0;
}


.lp-skip:focus {
    left: 0;
}


/* ------------------------------------------------------------
   Header
   ------------------------------------------------------------ */

.lp-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: saturate(180%) blur(10px);
    -webkit-backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid var(--ssm-color-border);
}


.lp-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--ssm-space-md);
    height: 64px;
}


.lp-brand {
    display: inline-flex;
    align-items: center;
    gap: var(--ssm-space-sm);
    font-weight: 700;
    font-size: 17px;
    color: var(--ssm-color-text);
    text-decoration: none;
}


.lp-brand__mark {
    font-size: 22px;
}


.lp-nav {
    display: flex;
    gap: var(--ssm-space-lg);
}


.lp-nav a {
    color: var(--ssm-color-text-muted);
    text-decoration: none;
    font-size: 15px;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
}


.lp-nav a:hover,
.lp-nav a:focus-visible {
    color: var(--ssm-color-text);
    border-bottom-color: var(--ssm-color-accent);
}


/* The navigation is a convenience, not the way in: on a phone the page is
   short enough to scroll, and the button must own the screen. */
@media (max-width: 620px) {
    .lp-nav {
        display: none;
    }
}


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

.lp-hero {
    background:
        radial-gradient(1100px 460px at 50% -8%, var(--ssm-color-accent-soft), transparent 70%),
        var(--ssm-color-surface);
    border-bottom: 1px solid var(--ssm-color-border);
}


.lp-hero__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--ssm-space-lg);
    padding-top: clamp(48px, 9vw, 96px);
    padding-bottom: clamp(48px, 9vw, 96px);
}


.lp-hero__title {
    font-size: clamp(32px, 6.2vw, 56px);
    line-height: 1.08;
    letter-spacing: -0.025em;
    max-width: 16ch;
}


.lp-hero__lead {
    font-size: clamp(16px, 2.1vw, 19px);
    color: var(--ssm-color-text-muted);
    max-width: 58ch;
}


.lp-fallback {
    padding: var(--ssm-space-md);
    border: 1px solid var(--ssm-color-border);
    border-radius: var(--ssm-radius-md);
    background: var(--ssm-color-surface-muted);
}


/* The call to action. Large, high contrast, and thumb-sized on a phone. */
.lp-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--ssm-space-sm);
    min-height: 56px;
    padding: 16px 40px;
    border: 0;
    border-radius: 999px;
    background: var(--ssm-color-accent);
    color: #fff;
    font-size: 18px;
    font-weight: 650;
    cursor: pointer;
    box-shadow: 0 10px 24px rgba(0, 122, 255, 0.28);
    transition: background 0.15s ease, transform 0.12s ease, box-shadow 0.15s ease;
}


.lp-cta:hover:not(:disabled) {
    background: var(--ssm-color-accent-strong);
    transform: translateY(-1px);
    box-shadow: 0 14px 30px rgba(0, 122, 255, 0.34);
}


.lp-cta:active:not(:disabled) {
    transform: translateY(1px);
    box-shadow: 0 6px 16px rgba(0, 122, 255, 0.28);
}


.lp-cta:disabled {
    opacity: 0.6;
    cursor: default;
    box-shadow: none;
}


.lp-measure {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--ssm-space-md);
}


.lp-measure__hint {
    font-size: 14px;
    color: var(--ssm-color-text-muted);
}


.lp-result {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: var(--ssm-space-md) var(--ssm-space-lg);
    border: 1px solid var(--ssm-color-accent);
    border-radius: var(--ssm-radius-md);
    background: var(--ssm-color-surface);
}


.lp-result__label {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ssm-color-text-muted);
}


.lp-result__value {
    font-size: 30px;
    font-weight: 700;
}


/* Spinner inside the button while a measurement is running. */
.lp-cta__spinner {
    display: none;
    width: 17px;
    height: 17px;
    border: 2px solid rgba(255, 255, 255, 0.45);
    border-top-color: #fff;
    border-radius: 50%;
    animation: lp-spin 0.7s linear infinite;
}


.is-measuring .lp-cta__spinner {
    display: block;
}


@keyframes lp-spin {
    to { transform: rotate(360deg); }
}


@media (prefers-reduced-motion: reduce) {
    .lp-cta__spinner {
        animation-duration: 2.4s;
    }
}


/* ------------------------------------------------------------
   Result card
   ------------------------------------------------------------ */

.lp-result-card {
    width: 100%;
    max-width: 420px;
    padding: var(--ssm-space-lg);
    background: var(--ssm-color-surface);
    border: 1px solid var(--ssm-color-border);
    border-radius: var(--ssm-radius-lg);
    box-shadow: 0 16px 40px rgba(12, 20, 33, 0.10);
    text-align: center;

    /* Starts slightly low and transparent so the answer arrives rather than
       simply appearing. `[hidden]` keeps it out of the layout until then. */
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.25s ease, transform 0.25s ease;
}


.lp-result-card.is-visible {
    opacity: 1;
    transform: none;
}


@media (prefers-reduced-motion: reduce) {
    .lp-result-card {
        transition: none;
    }
}


.lp-result-card__label {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--ssm-color-text-muted);
}


.lp-result-card__value {
    margin-top: var(--ssm-space-xs);
    font-size: clamp(38px, 7vw, 48px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.02em;

    /* Digits keep the same width, so the number does not jitter. */
    font-variant-numeric: tabular-nums;
}


.lp-result-card__unit {
    margin-left: 6px;
    font-size: 0.42em;
    font-weight: 600;
    color: var(--ssm-color-text-muted);
}


.lp-sizes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--ssm-space-sm);
    margin-top: var(--ssm-space-lg);
}


.lp-size {
    padding: var(--ssm-space-sm);
    background: var(--ssm-color-accent-soft);
    border-radius: var(--ssm-radius-md);
}


.lp-size__system {
    display: block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--ssm-color-accent-strong);
}


.lp-size__value {
    display: block;
    margin-top: 2px;
    font-size: 20px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}


.lp-result-card__note {
    margin-top: var(--ssm-space-md);
    font-size: 13px;
    line-height: 1.55;
    color: var(--ssm-color-text-muted);
}


.lp-result-card__ref {
    margin-top: var(--ssm-space-sm);
    font-size: 12px;
    color: var(--ssm-color-text-muted);
}


.lp-result-card__ref code {
    font-size: 12px;
    background: var(--ssm-color-surface-muted);
    border: 1px solid var(--ssm-color-border);
    border-radius: var(--ssm-radius-sm);
    padding: 1px 5px;
}


.lp-button-secondary {
    margin-top: var(--ssm-space-lg);
    padding: 11px 22px;
    border: 1px solid var(--ssm-color-border);
    border-radius: var(--ssm-radius-sm);
    background: var(--ssm-color-surface);
    color: var(--ssm-color-text);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}


.lp-button-secondary:hover {
    background: var(--ssm-color-accent-soft);
    border-color: var(--ssm-color-accent);
}


.lp-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--ssm-space-sm) var(--ssm-space-lg);
    list-style: none;
    margin: 0;
    padding: 0;
    color: var(--ssm-color-text-muted);
    font-size: 14px;
}


.lp-badges li::before {
    content: "\2713";
    color: var(--ssm-color-accent);
    font-weight: 700;
    margin-right: 6px;
}


/* ------------------------------------------------------------
   Sections
   ------------------------------------------------------------ */

.lp-section {
    padding: clamp(48px, 8vw, 88px) 0;
}


.lp-section--muted {
    background: var(--ssm-color-surface-muted);
    border-top: 1px solid var(--ssm-color-border);
    border-bottom: 1px solid var(--ssm-color-border);
}


.lp-section__title {
    font-size: clamp(24px, 3.6vw, 34px);
    line-height: 1.15;
    letter-spacing: -0.015em;
}


.lp-section__lead {
    margin-top: var(--ssm-space-sm);
    color: var(--ssm-color-text-muted);
    max-width: 60ch;
}


/* ------------------------------------------------------------
   Steps
   ------------------------------------------------------------ */

.lp-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--ssm-space-lg);
    margin: var(--ssm-space-xl) 0 0;
    padding: 0;
    list-style: none;
    counter-reset: none;
}


.lp-step {
    padding: var(--ssm-space-lg);
    background: var(--ssm-color-surface);
    border: 1px solid var(--ssm-color-border);
    border-radius: var(--ssm-radius-lg);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}


.lp-step:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(12, 20, 33, 0.08);
}


.lp-step__number {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--ssm-color-accent-soft);
    color: var(--ssm-color-accent-strong);
    font-weight: 700;
}


.lp-step__title {
    margin-top: var(--ssm-space-md);
    font-size: 19px;
}


.lp-step p {
    margin-top: var(--ssm-space-sm);
    color: var(--ssm-color-text-muted);
    font-size: 15px;
}


.lp-cta-row {
    margin-top: var(--ssm-space-xl);
}


.lp-link-cta {
    font-weight: 600;
    color: var(--ssm-color-accent-strong);
    text-decoration: none;
}


.lp-link-cta:hover {
    text-decoration: underline;
}


/* ------------------------------------------------------------
   Cards
   ------------------------------------------------------------ */

.lp-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--ssm-space-lg);
    margin-top: var(--ssm-space-xl);
}


.lp-card {
    padding: var(--ssm-space-lg);
    background: var(--ssm-color-surface);
    border: 1px solid var(--ssm-color-border);
    border-radius: var(--ssm-radius-lg);
}


.lp-card h3 {
    font-size: 18px;
}


.lp-card p {
    margin-top: var(--ssm-space-sm);
    color: var(--ssm-color-text-muted);
    font-size: 15px;
}


/* ------------------------------------------------------------
   FAQ - native <details>, no JavaScript needed
   ------------------------------------------------------------ */

.lp-faq {
    margin-top: var(--ssm-space-md);
    border: 1px solid var(--ssm-color-border);
    border-radius: var(--ssm-radius-md);
    background: var(--ssm-color-surface);
    overflow: hidden;
}


.lp-faq summary {
    padding: var(--ssm-space-md);
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--ssm-space-md);
}


.lp-faq summary::-webkit-details-marker {
    display: none;
}


.lp-faq summary::after {
    content: "+";
    font-size: 22px;
    font-weight: 400;
    color: var(--ssm-color-accent);
    line-height: 1;
}


.lp-faq[open] summary::after {
    content: "\2212";
}


.lp-faq summary:hover {
    background: var(--ssm-color-surface-muted);
}


.lp-faq p {
    padding: 0 var(--ssm-space-md) var(--ssm-space-md);
    color: var(--ssm-color-text-muted);
    font-size: 15px;
}


/* ------------------------------------------------------------
   Legal pages - long-form text, built for reading
   ------------------------------------------------------------ */

.lp-legal {
    padding: clamp(40px, 6vw, 72px) 0 clamp(48px, 8vw, 88px);
}


.lp-legal h1 {
    font-size: clamp(28px, 4.4vw, 40px);
    line-height: 1.15;
    letter-spacing: -0.02em;
}


.lp-legal h2 {
    margin-top: var(--ssm-space-xl);
    font-size: 20px;
    line-height: 1.3;
}


.lp-legal p,
.lp-legal ul {
    margin-top: var(--ssm-space-md);
    /* Long text is easier to read a little larger and looser. */
    font-size: 16px;
    line-height: 1.7;
    color: var(--ssm-color-text-muted);
}


.lp-legal ul {
    padding-left: 1.3em;
}


.lp-legal li + li {
    margin-top: var(--ssm-space-sm);
}


.lp-legal strong {
    color: var(--ssm-color-text);
}


.lp-legal a {
    color: var(--ssm-color-accent-strong);
}


.lp-legal__intro {
    margin-top: var(--ssm-space-lg);
    padding: var(--ssm-space-md) var(--ssm-space-lg);
    border-left: 3px solid var(--ssm-color-accent);
    background: var(--ssm-color-accent-soft);
    border-radius: 0 var(--ssm-radius-md) var(--ssm-radius-md) 0;
    color: var(--ssm-color-text);
}


.lp-legal__date {
    margin-top: var(--ssm-space-xl);
    padding-top: var(--ssm-space-md);
    border-top: 1px solid var(--ssm-color-border);
    font-size: 14px;
}


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

.lp-footer {
    background: var(--ssm-color-text);
    color: #e8ecf2;
    padding: clamp(40px, 6vw, 64px) 0 var(--ssm-space-lg);
}


.lp-footer__inner {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: var(--ssm-space-xl);
}


.lp-footer__brand {
    font-weight: 700;
    font-size: 17px;
    color: #fff;
}


.lp-footer__note {
    margin-top: var(--ssm-space-sm);
    color: #9aa6b6;
    font-size: 14px;
    max-width: 32ch;
}


.lp-footer__title {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #9aa6b6;
}


.lp-footer__address,
.lp-footer__list {
    margin-top: var(--ssm-space-sm);
    font-size: 14px;
    font-style: normal;
    line-height: 1.9;
    list-style: none;
    padding: 0;
}


.lp-footer a {
    color: #e8ecf2;
    text-decoration: none;
}


.lp-footer a:hover {
    text-decoration: underline;
}


.lp-footer__bottom {
    margin-top: var(--ssm-space-xl);
    padding-top: var(--ssm-space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    color: #9aa6b6;
    font-size: 13px;
}


@media (max-width: 620px) {

    .lp-container {
        padding: 0 var(--ssm-space-md);
    }

    .lp-cta {
        width: 100%;
    }

    .lp-measure {
        width: 100%;
    }

}