/* ===== Design tokens ===== */
:root {
    /* Fonts */
    --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    /* Type scale */
    --text-xs: 12px;
    --text-sm: 14px;
    --text-md: 16px;
    --text-lg: 18px;
    --text-xl: 20px;
    --text-2xl: 24px;
    --text-3xl: 32px;
    --text-4xl: 40px;
    --text-5xl: 48px;
    /* Spacing */
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-24: 96px;
    /* Radius + shadow */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.12);
    /* Colours (adjust later) */
    --bg: #0b0f14;
    --surface: #111824;
    --text: #f3f5f7;
    --muted: rgba(243,245,247,0.75);
    --border: rgba(243,245,247,0.14);
    --accent: #5b8cff;
    --accent-contrast: #0b0f14;
    --danger: #ff5b6e;
    --focus: rgba(91, 140, 255, 0.55);
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: var(--text-md);
    line-height: 1.6;
    background: var(--bg);
    color: var(--text);
}

/* Accessibility */
.skip-link {
    position: absolute;
    left: -999px;
    top: 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    z-index: 10000;
}

    .skip-link:focus {
        left: 10px;
        outline: 3px solid var(--focus);
    }

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
}

/* ===== Layout primitives ===== */
.container {
    max-width: 1120px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

.section {
    padding-top: 96px;
    padding-bottom: 96px;
}

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

.section--hero {
    padding-top: 96px;
    padding-bottom: 72px;
}

.section--band {
    padding-top: 48px;
    padding-bottom: 48px;
}

.grid {
    display: grid;
    gap: 24px;
}

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

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

.grid--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 991px) {
    .container {
        padding-left: 20px;
        padding-right: 20px;
    }

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

    .section--tight {
        padding-top: 56px;
        padding-bottom: 56px;
    }

    .section--hero {
        padding-top: 72px;
        padding-bottom: 56px;
    }

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

    .grid--4 {
        grid-template-columns: repeat(2, minmax(0,1fr));
    }
}

@media (max-width: 767px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .section {
        padding-top: 56px;
        padding-bottom: 56px;
    }

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

    .section--hero {
        padding-top: 56px;
        padding-bottom: 56px;
    }

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

    .grid--2, .grid--3, .grid--4 {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

/* ===== Typography ===== */
.h1 {
    font-size: var(--text-5xl);
    line-height: 1.12;
    letter-spacing: -0.02em;
    font-weight: 700;
    margin: 0 0 var(--space-6);
    max-width: 22ch;
}

.h2 {
    font-size: var(--text-3xl);
    line-height: 1.2;
    font-weight: 700;
    margin: 0 0 var(--space-6);
}

.h3 {
    font-size: var(--text-xl);
    line-height: 1.25;
    font-weight: 700;
    margin: 0 0 var(--space-3);
}

.text-lg {
    font-size: var(--text-lg);
}

.text-md {
    font-size: var(--text-md);
}

.text-sm {
    font-size: var(--text-sm);
}

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

@media (max-width: 767px) {
    .h1 {
        font-size: 38px;
    }

    .h2 {
        font-size: 28px;
    }
}

/* ===== Links + buttons ===== */
.link {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid transparent;
}

    .link:hover {
        border-bottom-color: currentColor;
    }

    .link:focus-visible {
        outline: 3px solid var(--focus);
        outline-offset: 3px;
    }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    font-size: var(--text-md);
    font-weight: 600;
    text-decoration: none;
    border: 1px solid transparent;
    transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
    cursor: pointer;
    user-select: none;
}

.btn--primary {
    background: var(--accent);
    color: var(--accent-contrast);
}

    .btn--primary:hover {
        transform: translateY(-1px);
        box-shadow: var(--shadow-md);
    }

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

    .btn--secondary:hover {
        box-shadow: var(--shadow-sm);
    }

.btn--ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text);
    padding: 10px 12px;
}

.btn--full {
    width: 100%;
    justify-content: center;
}

/* ===== Cards ===== */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

@media (max-width: 767px) {
    .card {
        padding: 16px;
    }
}

/* ===== Header ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 4000;
    background: rgba(11,15,20,0.65);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(243,245,247,0.08);
}

    .header.is-scrolled {
        background: rgba(11,15,20,0.9);
        border-bottom-color: rgba(243,245,247,0.12);
    }

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    padding-bottom: 14px;
    gap: 16px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: inherit;
    text-decoration: none;
}

.logo__mark {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(91,140,255,0.18);
    border: 1px solid rgba(91,140,255,0.35);
    font-weight: 800;
    letter-spacing: -0.02em;
}

.logo__text {
    font-weight: 700;
}

.nav {
    display: flex;
    gap: 18px;
    align-items: center;
}

.nav__link {
    color: var(--muted);
    text-decoration: none;
    font-size: var(--text-sm);
    padding: 8px 10px;
    border-radius: 10px;
}

    .nav__link:hover {
        color: var(--text);
        background: rgba(243,245,247,0.06);
    }

    .nav__link.is-active {
        color: var(--text);
        background: rgba(243,245,247,0.08);
    }

.header__right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.menu-btn {
    display: none;
    align-items: center;
    gap: 10px;
    border: 1px solid var(--border);
    background: rgba(243,245,247,0.04);
    color: var(--text);
    border-radius: var(--radius-sm);
    min-height: 48px;
    padding: 10px 12px;
}

.menu-btn__icon {
    width: 18px;
    height: 12px;
    border-top: 2px solid var(--text);
    border-bottom: 2px solid var(--text);
    position: relative;
}

    .menu-btn__icon::before {
        content: "";
        position: absolute;
        left: 0;
        right: 0;
        top: 4px;
        border-top: 2px solid var(--text);
    }

.menu-btn__text {
    font-size: var(--text-sm);
    font-weight: 700;
}

@media (max-width: 991px) {
    .nav {
        display: none;
    }

    .menu-btn {
        display: inline-flex;
    }
}

/* ===== Mobile menu drawer ===== */
.menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 5000;
}

.menu-drawer {
    position: fixed;
    top: 0;
    right: 0;
    height: 100%;
    width: min(420px, 92vw);
    /*background: var(--bg);*/
    background: var(--surface);
    border-left: 1px solid var(--border);
    z-index: 5100;
    padding: 18px;
    transform: translateX(105%);
    transition: transform 200ms ease;
}

    .menu-drawer.is-open {
        transform: translateX(0);
    }

.menu-drawer__head {
    display: flex;
    align-items:center;
    justify-content: space-between;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.menu-drawer__title {
    font-weight: 800;
}

.menu-close {
    min-height: 44px;
    min-width: 44px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: rgba(243,245,247,0.04);
    color: var(--text);
}

.menu-drawer__links {
    display: flex;
    flex-direction: column;
    gap: 6px;
    /*padding: 8px 0 14px;*/
    background: rgba(243,245,247,0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 10px;
}

.menu-drawer__cta {
    margin-top: 10px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

/* Make menu links easier to scan/tap */
.menu-drawer .nav__link {
    color: var(--text);
    display: block;
    width: 100%;
    padding: 12px 12px;
    border-radius: 12px;
}

    .menu-drawer .nav__link:hover {
        background: rgba(243,245,247,0.06);
    }



/* ===== Mobile CTA bar ===== */
.cta-bar {
    display: none;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 10px 0;
    background: rgba(11,15,20,0.92);
    border-top: 1px solid rgba(243,245,247,0.12);
    z-index: 3500;
}

@media (max-width: 767px) {
    .cta-bar {
        display: block;
    }

    body {
        padding-bottom: 78px;
    }
    /* prevent overlap */
    .header__cta {
        display: none;
    }

    /* Optional: saves space so logo + hamburger always fit */
    .logo__text {
        display: none;
    }
}

/* ===== Footer ===== */
.footer {
    border-top: 1px solid rgba(243,245,247,0.10);
    padding: 48px 0;
}

.footer__top {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 20px;
}

.footer__blurb {
    margin: 0;
    max-width: 70ch;
}

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-top: 28px;
    flex-wrap: wrap;
}

.footer__links {
    display: flex;
    gap: 14px;
    align-items: center;
}

/* Utilities */
.mt-3 {
    margin-top: var(--space-3);
}


/* ===== Hero (M01) ===== */
.hero__grid {
    align-items: start;
}

.hero__subhead {
    max-width: 70ch;
    margin: 0 0 var(--space-6);
}

.hero__actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.hero__micro {
    margin: 10px 0 0;
}

.hero__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: var(--space-6);
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(243,245,247,0.03);
}

/* Scorecard */
.card--scorecard {
    padding: 22px;
}

.scorecard__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(243,245,247,0.10);
    margin-bottom: 8px;
}

.scorecard__title {
    margin: 0;
}

.scorecard__note {
    margin: 0;
    text-align: right;
}

.kpi {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 14px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(243,245,247,0.08);
}

.kpi--last {
    border-bottom: none;
    padding-bottom: 0;
}

.kpi__value {
    font-family: var(--font-mono);
    font-size: var(--text-2xl);
    line-height: 1.2;
}

.kpi__value--small {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--muted);
}

@media (max-width: 767px) {
    .hero__actions {
        flex-direction: column;
        align-items: stretch;
    }

    .hero__link {
        text-align: center;
        padding: 10px 0;
    }

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

    .scorecard__note {
        text-align: left;
    }
}


/* ===== Leak tiles (M02) ===== */
.leak__grid {
    margin-top: var(--space-6);
}

.leak__grid--second {
    margin-top: var(--space-4);
}

.tile {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 18px;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.tile__icon {
    width: 34px;
    height: 34px;
    border-radius: 12px;
    flex: 0 0 auto;
    background: rgba(91,140,255,0.18);
    border: 1px solid rgba(91,140,255,0.35);
    box-shadow: 0 0 0 6px rgba(91,140,255,0.06);
    margin-top: 2px;
}

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



/* ===== How it works (M03) ===== */
.how__grid {
    margin-top: var(--space-6);
}

/* Step cards */
.step-card {
    position: relative;
    padding-top: 18px; /* card already has padding; this just gives room for the number */
}

.step-card__num {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.step-card__title {
    margin-top: 0;
}

.step-card__text {
    margin: 0;
}

/* CTA band (reusable) */
.cta-band {
    margin-top: var(--space-10);
}

.cta-band__inner {
    background: rgba(243,245,247,0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.cta-band__title {
    margin: 0;
}

.cta-band__meta {
    margin: 8px 0 0;
}

@media (max-width: 767px) {
    .cta-band__inner {
        flex-direction: column;
        align-items: stretch;
    }

    .cta-band__action .btn {
        width: 100%;
        justify-content: center;
    }
}



/* ===== Outcomes (M04) ===== */
.outcomes__list {
    margin: var(--space-6) 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 12px;
    max-width: 80ch;
}

.outcomes__item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    background: rgba(243,245,247,0.03);
    border: 1px solid rgba(243,245,247,0.10);
    border-radius: var(--radius-md);
    padding: 14px 14px;
}

.outcomes__icon {
    width: 12px;
    height: 12px;
    border-radius: 999px;
    background: rgba(91,140,255,0.9);
    box-shadow: 0 0 0 6px rgba(91,140,255,0.12);
    margin-top: 4px;
    flex: 0 0 auto;
}

.note {
    margin-top: var(--space-6);
    max-width: 80ch;
}



/* ===== Systems cards (M05) ===== */
.systems__grid {
    margin-top: var(--space-6);
}

.card--system {
    transition: transform 170ms ease, box-shadow 170ms ease, border-color 170ms ease;
}

    .card--system:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
        border-color: rgba(91,140,255,0.35);
    }

.card__title {
    margin-top: 0;
}

.card__meta {
    display: grid;
    gap: 12px;
    margin-top: 10px;
    margin-bottom: 12px;
}

.meta-row {
    display: grid;
    gap: 6px;
}

.meta-label {
    font-weight: 700;
}

.meta-text {
    color: var(--text);
    line-height: 1.55;
}

/* Ghost link inside cards */
.card__link {
    padding-left: 0;
    padding-right: 0;
    justify-content: flex-start;
    border-radius: 10px;
}

    .card__link:hover {
        background: rgba(243,245,247,0.04);
    }