/* Numbio landing — app UI (blue, brackets, whitespace) + Koslowsky.net (Outfit, JetBrains Mono, teal breath) */

:root {
    --app-blue: #2563eb;
    --app-blue-hover: #1d4ed8;
    --site-teal: #06b6d4;
    --accent: var(--app-blue);
    --accent-mix: color-mix(in srgb, var(--app-blue) 85%, var(--site-teal) 15%);

    --bg: #fafbfc;
    --bg-elevated: #ffffff;
    --bg-muted: #f1f5f9;
    --text: #0f172a;
    --text-soft: #475569;
    --text-faint: #94a3b8;
    --line: rgba(15, 23, 42, 0.08);
    --bracket: var(--app-blue);
    --shadow: 0 32px 64px -24px rgba(15, 23, 42, 0.12);
    --shadow-soft: 0 12px 40px -20px rgba(37, 99, 235, 0.15);

    --font-sans: 'Outfit', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, monospace;
    --max: 1180px;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --corner-arm: 22px;
    --corner-thick: 2px;
}

[data-theme='dark'] {
    --bg: #05080d;
    --bg-elevated: #0c1017;
    --bg-muted: #111820;
    --text: #f1f5f9;
    --text-soft: #94a3b8;
    --text-faint: #64748b;
    --line: rgba(148, 163, 184, 0.12);
    --bracket: #3b82f6;
    --shadow: 0 40px 80px -30px rgba(0, 0, 0, 0.55);
    --shadow-soft: 0 20px 50px -20px rgba(37, 99, 235, 0.25);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 1.0625rem;
    line-height: 1.55;
    color: var(--text);
    background: var(--bg);
}

/* Subtle grid + glow (portfolio-adjacent, still minimal) */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(ellipse 70% 45% at 50% -15%, color-mix(in srgb, var(--site-teal) 12%, transparent), transparent 55%),
        radial-gradient(ellipse 50% 40% at 100% 0%, color-mix(in srgb, var(--app-blue) 8%, transparent), transparent 50%),
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: auto, auto, 56px 56px, 56px 56px;
    opacity: 0.9;
}

[data-theme='dark'] body::before {
    background:
        radial-gradient(ellipse 70% 45% at 50% -15%, color-mix(in srgb, var(--site-teal) 18%, transparent), transparent 55%),
        radial-gradient(ellipse 45% 35% at 95% 5%, color-mix(in srgb, var(--app-blue) 12%, transparent), transparent 45%),
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: auto, auto, 56px 56px, 56px 56px;
}

.page-shell {
    position: relative;
    z-index: 1;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

/* —— Nav —— */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 40;
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.nav-inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    letter-spacing: -0.03em;
}

.brand-mark {
    font-size: 1.125rem;
}

.brand-dot {
    color: var(--site-teal);
}

.brand-slash {
    width: 1px;
    height: 1.1rem;
    background: var(--line);
}

.brand-product {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-soft);
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.theme-toggle {
    border: 0;
    padding: 0;
    background: transparent;
    cursor: pointer;
}

.theme-toggle-track {
    display: block;
    width: 48px;
    height: 26px;
    background: var(--bg-muted);
    border: 1px solid var(--line);
    position: relative;
    transition: background 0.2s var(--ease);
}

.theme-toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: var(--bg-elevated);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
    transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

[data-theme='dark'] .theme-toggle-track {
    background: #1e293b;
}

[data-theme='dark'] .theme-toggle-thumb {
    background: #334155;
}

.theme-toggle[aria-pressed='true'] .theme-toggle-thumb {
    transform: translateX(22px);
    background: var(--app-blue);
}

[data-theme='dark'] .theme-toggle[aria-pressed='true'] .theme-toggle-thumb {
    background: var(--site-teal);
}

.nav-cta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.65rem 1rem;
    background: var(--accent);
    color: #fff;
    transition: transform 0.15s var(--ease), background 0.15s var(--ease), box-shadow 0.15s var(--ease);
    box-shadow: 0 4px 20px color-mix(in srgb, var(--app-blue) 35%, transparent);
}

.nav-cta:hover {
    background: var(--app-blue-hover);
    transform: translateY(-1px);
}

/* —— Hero —— */
.hero {
    padding: clamp(2.5rem, 8vw, 5rem) 1.5rem 3rem;
}

.hero-inner {
    max-width: var(--max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(300px, 1.12fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
}

.kicker {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin: 0 0 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-faint);
}

.kicker-bar {
    width: 3px;
    height: 1rem;
    background: linear-gradient(180deg, var(--app-blue), var(--site-teal));
}

.hero h1 {
    margin: 0;
    font-size: clamp(2.35rem, 5.5vw, 3.75rem);
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.045em;
}

.hero h1 em {
    font-style: normal;
    color: var(--accent);
}

.hero-lead {
    margin: 1.25rem 0 0;
    max-width: 36ch;
    color: var(--text-soft);
    font-size: 1.05rem;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.75rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 1.35rem;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transition: transform 0.15s var(--ease), background 0.15s var(--ease), border-color 0.15s var(--ease), color 0.15s var(--ease);
}

.btn-solid {
    background: var(--accent);
    color: #fff;
    border: 1px solid transparent;
    box-shadow: 0 8px 28px color-mix(in srgb, var(--app-blue) 30%, transparent);
}

.btn-solid:hover {
    background: var(--app-blue-hover);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--line);
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.hero-meta {
    margin: 1.5rem 0 0;
    font-size: 0.875rem;
    color: var(--text-soft);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.live-dot {
    width: 8px;
    height: 8px;
    flex-shrink: 0;
    background: #10b981;
    box-shadow: 0 0 0 2px color-mix(in srgb, #10b981 28%, transparent);
}

/* Sharp L-bracket corners (matches in-app HUD) */
.hud-corners {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
}

.hud-c {
    position: absolute;
    width: var(--corner-arm);
    height: var(--corner-arm);
    border-color: var(--bracket);
    border-style: solid;
    border-width: 0;
}

.hud-c-tl {
    top: 0;
    left: 0;
    border-top-width: var(--corner-thick);
    border-left-width: var(--corner-thick);
}

.hud-c-tr {
    top: 0;
    right: 0;
    border-top-width: var(--corner-thick);
    border-right-width: var(--corner-thick);
}

.hud-c-bl {
    bottom: 0;
    left: 0;
    border-bottom-width: var(--corner-thick);
    border-left-width: var(--corner-thick);
}

.hud-c-br {
    bottom: 0;
    right: 0;
    border-bottom-width: var(--corner-thick);
    border-right-width: var(--corner-thick);
}

.hud-corners--inner {
    inset: 10px;
}

.hud-corners--footer {
    inset: 14px;
}

.hud-box {
    position: relative;
}

.hud-box--footer .hud-corners {
    z-index: 0;
}

.hud-box--footer .footer-copy,
.hud-box--footer .footer-actions {
    position: relative;
    z-index: 1;
}

/* Device + brackets */
.hero-device {
    position: relative;
    padding: clamp(0.25rem, 1.5vw, 0.75rem) 0 0;
}

.device-panel {
    position: relative;
    padding: clamp(0.5rem, 1.5vw, 1rem) clamp(0.75rem, 2vw, 1.25rem) clamp(0.35rem, 1vw, 0.65rem);
}

/*
 * Stage height follows the *active* slide only (PNG mockups are not full 390×844 fills).
 * Inactive slides are absolute so they don't stretch a bogus aspect-ratio box.
 */
.device-stage {
    position: relative;
    width: min(520px, 92vw);
    max-width: 100%;
    margin: 0 auto;
}

.slide {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    opacity: 0;
    transform: translateY(12px) scale(0.98);
    transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
    pointer-events: none;
}

.slide.is-active {
    position: relative;
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
    z-index: 1;
}

.slide img {
    width: 100%;
    max-width: 100%;
    height: auto;
    max-height: min(88vh, 920px);
    object-fit: contain;
    object-position: top center;
    filter: drop-shadow(var(--shadow-soft));
}

.device-caption {
    margin-top: 0.65rem;
    padding-top: 0.85rem;
    border-top: 1px solid var(--line);
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem 1.5rem;
    flex-wrap: wrap;
}

@media (max-width: 640px) {
    .device-caption {
        flex-direction: column;
        align-items: stretch;
    }

    .carousel-controls {
        width: 100%;
        justify-content: center;
    }
}

.caption-title {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.caption-text {
    margin: 0.35rem 0 0;
    font-size: 0.9rem;
    color: var(--text-soft);
    max-width: 28ch;
}

.carousel-controls {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.carousel-arrow {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    padding: 0;
    border: var(--corner-thick) solid var(--line);
    background: var(--bg-elevated);
    color: var(--text);
    cursor: pointer;
    display: grid;
    place-items: center;
    transition: border-color 0.15s var(--ease), color 0.15s var(--ease), background 0.15s var(--ease);
    touch-action: manipulation;
}

.carousel-arrow:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.carousel-arrow:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.carousel-arrow-inner {
    display: block;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 7px 10px 7px 0;
    border-color: transparent currentColor transparent transparent;
}

.carousel-arrow-inner.is-next {
    border-width: 7px 0 7px 10px;
    border-color: transparent transparent transparent currentColor;
}

.carousel-dots {
    display: flex;
    align-items: center;
    gap: 2px;
}

.dot {
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    display: grid;
    place-items: center;
    touch-action: manipulation;
    transition: opacity 0.15s var(--ease);
}

.dot:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.dot-hit {
    width: 11px;
    height: 11px;
    background: var(--bg-muted);
    border: var(--corner-thick) solid var(--line);
    transition: background 0.15s var(--ease), border-color 0.15s var(--ease);
}

.dot.is-active .dot-hit {
    background: var(--accent);
    border-color: var(--accent);
}

/* —— Band —— */
.band {
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--bg-elevated);
}

.band-tight .band-inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 1.25rem 1.5rem;
}

.pill-row {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-soft);
}

.pill-label {
    color: var(--accent);
    margin-right: 0.35rem;
}

/* —— Sections —— */
.section {
    padding: clamp(3rem, 8vw, 5rem) 1.5rem;
}

.section-inner {
    max-width: var(--max);
    margin: 0 auto;
}

.section-muted {
    background: var(--bg-muted);
}

.section-title {
    margin: 0 0 1.5rem;
    font-size: clamp(1.65rem, 3.2vw, 2.25rem);
    font-weight: 600;
    letter-spacing: -0.035em;
    line-height: 1.15;
}

.section-title.center {
    text-align: center;
    margin-bottom: 2.25rem;
}

.split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(240px, 0.85fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
}

.prose p {
    margin: 0;
    color: var(--text-soft);
    max-width: 42ch;
}

.prose-shot {
    position: relative;
    padding: 1rem;
    background: var(--bg-elevated);
    box-shadow: var(--shadow);
    border: 1px solid var(--line);
}

.prose-shot img {
    position: relative;
    z-index: 1;
    margin: 0 auto;
    width: min(100%, min(420px, 88vw));
    max-height: min(78vh, 820px);
    height: auto;
    object-fit: contain;
}

.pillar-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.pillar {
    padding: 1.5rem 1.25rem;
    border: 1px solid var(--line);
    background: var(--bg-elevated);
    transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.pillar:hover {
    border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
    box-shadow: var(--shadow-soft);
}

.pillar-idx {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    color: var(--accent);
}

.pillar h3 {
    margin: 0.75rem 0 0.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.pillar p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-soft);
    line-height: 1.5;
}

/* Loop */
.loop-steps {
    list-style: none;
    margin: 0 0 2.5rem;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
    max-width: 820px;
    margin-left: auto;
    margin-right: auto;
}

.loop-steps li {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.25rem;
    border: 1px solid var(--line);
    background: var(--bg-elevated);
}

.loop-num {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    display: grid;
    place-items: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
}

.loop-steps strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.loop-steps span:last-child {
    font-size: 0.875rem;
    color: var(--text-soft);
}

.loop-shots {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(1rem, 3vw, 1.75rem);
    max-width: min(960px, 100%);
    margin: 0 auto;
}

.loop-shot {
    position: relative;
    padding: 0.75rem;
    background: var(--bg-muted);
    border: 1px solid var(--line);
}

.loop-shot img {
    position: relative;
    z-index: 1;
    margin: 0 auto;
    width: min(100%, min(420px, 92vw));
    max-height: min(70vh, 720px);
    height: auto;
    object-fit: contain;
}

/* Privacy page */
.legal-hero {
    padding: clamp(4rem, 9vw, 6rem) 1.5rem 1.5rem;
}

.legal-inner,
.legal-card,
.legal-grid {
    max-width: var(--max);
    margin: 0 auto;
}

.legal-title {
    margin: 0;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 0.95;
    letter-spacing: -0.05em;
}

.legal-lead {
    max-width: 44rem;
    margin: 1rem 0 0;
    font-size: 1.125rem;
    color: var(--text-soft);
}

.legal-meta {
    margin: 1rem 0 0;
    color: var(--text-faint);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.legal-section {
    padding-top: 0;
}

.legal-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
}

.legal-card {
    padding: clamp(1.5rem, 3vw, 2rem);
    background: var(--bg-elevated);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.legal-card h2 {
    margin: 0 0 1rem;
    font-size: 1.35rem;
    letter-spacing: -0.03em;
}

.legal-card p {
    margin: 0;
    color: var(--text-soft);
}

.legal-card p + p {
    margin-top: 0.9rem;
}

.legal-card a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.legal-list {
    margin: 0;
    padding-left: 1.2rem;
    color: var(--text-soft);
}

.legal-list li + li {
    margin-top: 0.6rem;
}

/* Footer */
.site-footer {
    padding: 0 1.5rem 4rem;
}

.footer-inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: clamp(2rem, 5vw, 3rem);
    background: var(--bg-elevated);
    border: 1px solid var(--line);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    position: relative;
    box-shadow: var(--shadow);
}

.footer-logo {
    margin: 0 0 0.5rem;
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--accent);
}

.footer-logo span {
    display: inline-block;
}

.footer-copy h2 {
    margin: 0 0 0.5rem;
    font-size: clamp(1.35rem, 2.5vw, 1.75rem);
    font-weight: 600;
    letter-spacing: -0.03em;
}

.footer-copy p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-soft);
}

.footer-copy a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.footer-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    position: relative;
    z-index: 1;
}

/* Reveal */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.is-in {
    opacity: 1;
    transform: translateY(0);
}

@media (min-width: 1100px) {
    .device-stage {
        width: min(580px, 92vw);
    }
}

/* Responsive */
@media (max-width: 900px) {
    .hero-inner {
        grid-template-columns: 1fr;
    }

    .hero-device {
        order: -1;
        max-width: min(560px, 100%);
        margin: 0 auto;
        width: 100%;
    }

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

    .prose-shot {
        max-width: min(480px, 100%);
        margin: 0 auto;
    }

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

    .loop-steps {
        grid-template-columns: 1fr;
    }

    .loop-shots {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .nav-inner {
        padding: 0.875rem 1rem;
    }

    .hero {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .pill-row {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }

    .footer-inner {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .footer-actions {
        justify-content: center;
    }
}