/* ============================================================
   Prysm8 — Design System
   Dark technical aesthetic for automotive software audience
   ============================================================ */

:root {
    color-scheme: dark;

    /* Color */
    --bg-base: #0a0e14;
    --bg-elevated: #131822;
    --bg-elevated-hover: #1a2030;
    --text-primary: #e8ecf1;
    --text-secondary: #8a93a3;
    --text-muted: #838c9c; /* lightened from #5c6573 to clear WCAG AA 4.5:1 on dark backgrounds */
    --accent-primary: #2b6cff;
    --accent-primary-hover: #4a80ff;
    --button-primary-hover: #1f57d6; /* darker than accent so white button text stays AA on hover */
    --accent-signal: #00d4a8;
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.16);
    --focus-ring: rgba(43, 108, 255, 0.5);
    --accent-warn: #e8b04f;
    --accent-warn-border: rgba(232, 176, 79, 0.35);
    --accent-warn-bg: rgba(232, 176, 79, 0.07);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;

    --text-12: 0.75rem;
    --text-14: 0.875rem;
    --text-16: 1rem;
    --text-20: 1.25rem;
    --text-28: 1.75rem;
    --text-44: 2.75rem;
    --text-hero: clamp(2.5rem, 6vw, 4rem);

    --leading-tight: 1.2;
    --leading-snug: 1.4;
    --leading-normal: 1.6;

    /* Spacing scale */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;
    --space-8: 64px;
    --space-9: 96px;

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Layout */
    --container: 1200px;
    --container-narrow: 880px;
    --header-h: 72px;
}

/* ============================================================
   Reset & base
   ============================================================ */

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

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: var(--text-16);
    line-height: var(--leading-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

main { padding-top: var(--header-h); }

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

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

button { font-family: inherit; cursor: pointer; }

:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Subtle ambient background — no rainbow */
.background-container {
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 80% 60% at 20% 0%, rgba(43, 108, 255, 0.08), transparent 60%),
        radial-gradient(ellipse 70% 50% at 80% 30%, rgba(0, 212, 168, 0.04), transparent 60%),
        var(--bg-base);
}

/* ============================================================
   Typography primitives
   ============================================================ */

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: var(--leading-tight);
    color: var(--text-primary);
    margin: 0 0 var(--space-4);
    letter-spacing: -0.02em;
}

h1 { font-size: var(--text-hero); letter-spacing: -0.03em; }
h2 { font-size: var(--text-44); }
h3 { font-size: var(--text-28); }
h4 { font-size: var(--text-20); }

h1, h2, h3, h4 { overflow-wrap: break-word; }

@media (max-width: 540px) {
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
}

p { margin: 0 0 var(--space-4); color: var(--text-secondary); }

.eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--text-12);
    font-weight: 500;
    color: var(--accent-signal);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: var(--space-3);
}

.lead {
    font-size: var(--text-20);
    color: var(--text-secondary);
    line-height: var(--leading-snug);
    max-width: 680px;
}

.mono { font-family: var(--font-mono); }

/* ============================================================
   Layout primitives
   ============================================================ */

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.container-narrow { max-width: var(--container-narrow); }

section { padding: var(--space-9) 0; }
section.section-sm { padding: var(--space-7) 0; }

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--space-7);
}
.section-header .lead { margin-inline: auto; }

/* ============================================================
   Header / Navigation
   ============================================================ */

#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    background: rgba(10, 14, 20, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 100;
}

#header nav {
    height: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--space-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
    text-decoration: none;
}
.logo-container:hover { color: var(--text-primary); }

.logo-image { height: 40px; width: auto; }

.logo {
    font-weight: 700;
    font-size: var(--text-20);
    letter-spacing: 0.04em;
    color: var(--text-primary);
}
/* Keep in sync with .footer-logo — the wordmark must track identically everywhere */

.nav-dropdown { position: relative; }

.nav-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-14);
    font-weight: 500;
    transition: background 0.15s, border-color 0.15s;
}
.nav-toggle:hover { background: var(--bg-elevated); border-color: var(--border-strong); }

.nav-favicon { width: 16px; height: 16px; }

.dropdown-arrow {
    font-size: 10px;
    transition: transform 0.2s;
}
.nav-toggle.active .dropdown-arrow { transform: rotate(180deg); }

.nav-links {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    min-width: 220px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-2);
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 0.15s, transform 0.15s, visibility 0.15s;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}
.nav-links.dropdown-active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-links li { margin: 0; }

.nav-links a {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--text-primary);
    font-size: var(--text-14);
    font-weight: 500;
    border-radius: var(--radius-sm);
}
.nav-links a:hover { background: var(--bg-elevated-hover); color: var(--accent-signal); }

.mobile-menu-toggle {
    transition: background 0.15s, border-color 0.15s;
    display: none;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    width: 40px;
    height: 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    padding: 0;
}

.hamburger-line {
    width: 18px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}
.mobile-menu-toggle:hover { background: var(--bg-elevated); border-color: var(--border-strong); }

.mobile-menu-toggle.active .hamburger-line:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.mobile-menu-toggle.active .hamburger-line:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active .hamburger-line:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-subtle);
    padding: var(--space-3);
    list-style: none;
    margin: 0;
    display: none;
}
.mobile-nav-links.mobile-active { display: block; }
.mobile-nav-links li { margin: 0; }
.mobile-nav-links a {
    display: block;
    padding: var(--space-4);
    color: var(--text-primary);
    font-size: var(--text-16);
    font-weight: 500;
    border-radius: var(--radius-sm);
}
.mobile-nav-links a:hover { background: var(--bg-elevated-hover); color: var(--accent-signal); }

@media (max-width: 768px) {
    .nav-dropdown { display: none; }
    .mobile-menu-toggle { display: flex; }
}

/* ============================================================
   Buttons
   ============================================================ */

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    font-size: var(--text-14);
    font-weight: 600;
    text-decoration: none;
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    cursor: pointer;
    line-height: 1;
    white-space: nowrap;
}

.button-primary {
    background: var(--accent-primary);
    color: #fff;
}
.button-primary:hover {
    background: var(--button-primary-hover);
    color: #fff;
}

.button-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-strong);
}
.button-secondary:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.button-lg {
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-16);
}

/* Long button labels must wrap on small screens instead of forcing overflow */
@media (max-width: 540px) {
    .button { white-space: normal; line-height: 1.3; }
    .hero-actions { flex-direction: column; align-items: stretch; }
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
    padding: var(--space-9) 0 var(--space-8);
}

.hero-content {
    max-width: 880px;
    margin: 0 auto;
    padding: 0 var(--space-5);
    text-align: center;
}

.hero-wordmark {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}
.hero-wordmark span {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--text-primary);
    line-height: 1;
}
.hero-wordmark img {
    height: clamp(64px, 9vw, 92px);
    width: auto;
}

.hero h1 {
    margin-bottom: var(--space-5);
}

.hero .subtitle {
    font-size: var(--text-20);
    color: var(--text-secondary);
    margin: 0 auto var(--space-6);
    max-width: 640px;
    line-height: var(--leading-snug);
}

.hero-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-6);
}

/* Sub-page hero variant (smaller) */
.hero.hero-sub { padding: calc(var(--space-9) - var(--space-3)) 0 var(--space-6); }
.hero.hero-sub h1 { font-size: clamp(2rem, 4.5vw, 3rem); }

/* ============================================================
   Cards (generic)
   ============================================================ */

.card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}

a.card { color: inherit; text-decoration: none; display: block; }

a.card:hover, .card.card-hover:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.card h3 { font-size: var(--text-20); margin-bottom: var(--space-3); }
.card p { color: var(--text-secondary); margin-bottom: 0; }


/* ============================================================
   Two-pillar split (homepage)
   ============================================================ */

.pillar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
}

.pillar-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-7);
    display: flex;
    flex-direction: column;
}
.pillar-card:hover { border-color: var(--accent-primary); }

.pillar-card .eyebrow { margin-bottom: var(--space-3); }
.pillar-card h3 { font-size: var(--text-28); margin-bottom: var(--space-3); }
.pillar-card p { margin-bottom: var(--space-5); }

.pillar-card .pillar-features {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-5);
    flex: 1;
}
.pillar-card .pillar-features li {
    color: var(--text-secondary);
    font-size: var(--text-14);
    padding: var(--space-3) 0;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}
.pillar-card .pillar-features li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent-signal);
    border-radius: 50%;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .pillar-grid { grid-template-columns: 1fr; gap: var(--space-4); }
    .pillar-card { padding: var(--space-5); }
}

/* ============================================================
   Grids
   ============================================================ */

.grid {
    display: grid;
    gap: var(--space-5);
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ============================================================
   Waitlist form
   ============================================================ */

.waitlist-form {
    display: flex;
    gap: var(--space-2);
    max-width: 480px;
    margin: 0 auto;
}

.waitlist-form input[type="email"] {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-base);
    border: 1px solid var(--border-strong);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--text-14);
    min-width: 0;
}
.waitlist-form input[type="email"]:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--focus-ring);
}
.waitlist-form input[type="email"]::placeholder { color: var(--text-muted); }

.waitlist-note {
    text-align: center;
}

.waitlist-form-card {
    background: linear-gradient(135deg, rgba(43, 108, 255, 0.12), rgba(0, 212, 168, 0.08));
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg);
    padding: var(--space-7);
    text-align: center;
}

@media (max-width: 540px) {
    .waitlist-form { flex-direction: column; }
}

/* ============================================================
   Process steps
   ============================================================ */

.process-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
    counter-reset: step;
}

.process-step {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    position: relative;
}

.process-step::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    font-family: var(--font-mono);
    font-size: var(--text-12);
    color: var(--accent-signal);
    letter-spacing: 0.12em;
    display: block;
    margin-bottom: var(--space-4);
}

.process-step h3 { font-size: var(--text-20); margin-bottom: var(--space-3); }
.process-step p { margin: 0; }

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

@media (max-width: 1024px) {
    .process-grid.process-grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .process-grid, .process-grid.process-grid-4 { grid-template-columns: 1fr; }
}

/* ============================================================
   Toolchain badges
   ============================================================ */

.toolchain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-3);
}

.toolchain-item {
    padding: var(--space-4);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    text-align: center;
    font-family: var(--font-mono);
    font-size: var(--text-14);
    color: var(--text-primary);
}

/* ============================================================
   Contact form
   ============================================================ */

.contact-form-wrap {
    max-width: 760px;
    margin: 0 auto;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-7);
}

.contact-form .form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}
@media (max-width: 640px) {
    .contact-form .form-grid { grid-template-columns: 1fr; }
    .contact-form-wrap { padding: var(--space-5); }
}

.form-field { margin-bottom: var(--space-4); }

.contact-form label {
    display: block;
    font-size: var(--text-14);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}
.contact-form label .optional {
    color: var(--text-muted);
    font-weight: 400;
    font-size: var(--text-12);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-base);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: var(--text-14);
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--focus-ring);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--text-muted); }
.contact-form textarea { min-height: 140px; resize: vertical; }

.form-note, .waitlist-note {
    font-family: var(--font-mono);
    font-size: var(--text-12);
    color: var(--text-muted);
    margin-top: var(--space-3);
}

.form-success {
    display: none;
    background: rgba(0, 212, 168, 0.1);
    border: 1px solid rgba(0, 212, 168, 0.4);
    border-radius: var(--radius-md);
    color: var(--accent-signal);
    padding: var(--space-4);
    margin-bottom: var(--space-5);
    font-size: var(--text-14);
}
.form-success.visible { display: block; }

.honeypot { position: absolute; left: -9999px; opacity: 0; }

/* ============================================================
   Partner highlight
   ============================================================ */

.partner-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--text-12);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent-signal);
    border: 1px solid rgba(0, 212, 168, 0.4);
    border-radius: var(--radius-sm);
    padding: var(--space-1) var(--space-2);
    vertical-align: middle;
}

.toolchain-partner {
    border-color: rgba(0, 212, 168, 0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

/* ============================================================
   Contact
   ============================================================ */

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
}

.contact-item {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
}

.contact-item h3 { font-size: var(--text-20); margin-bottom: var(--space-3); }
.contact-item a,
.contact-item .contact-action {
    display: block;
    color: var(--text-primary);
    font-size: var(--text-20);
    font-weight: 600;
    margin: var(--space-3) 0;
}
.contact-item a:hover { color: var(--accent-signal); }
.contact-item p { color: var(--text-secondary); font-size: var(--text-14); margin: var(--space-2) 0 0; }

/* Whole-card contact links get the same hover feedback as other card links */
a.contact-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(43, 108, 255, 0.25);
}
a.contact-item:hover .contact-action { color: var(--accent-signal); }

.contact-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--space-4);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(43, 108, 255, 0.1);
    border: 1px solid rgba(43, 108, 255, 0.25);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
}
.contact-icon svg { width: 20px; height: 20px; }

@media (max-width: 768px) { .contact-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; } }

/* ============================================================
   Value props (homepage "Why Prysm8")
   ============================================================ */

.value-props {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
}
@media (max-width: 768px) { .value-props { grid-template-columns: 1fr; } }

/* ============================================================
   FAQ
   ============================================================ */

.faq { max-width: var(--container-narrow); margin: 0 auto; }

.faq-item {
    border-bottom: 1px solid var(--border-subtle);
    padding: var(--space-5) 0;
}
.faq-item:first-child { border-top: 1px solid var(--border-subtle); }

.faq-item h3 {
    font-size: var(--text-20);
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}
.faq-item p { margin: 0; }

/* ============================================================
   Capability row (System Origin features)
   ============================================================ */

.capability-row {
    display: flex;
    align-items: flex-start;
    gap: var(--space-5);
    padding: var(--space-5) 0;
    border-bottom: 1px solid var(--border-subtle);
}
.capability-row:last-child { border-bottom: none; }
.capability-row .capability-body h3 { font-size: var(--text-20); margin-bottom: var(--space-2); }
.capability-row .capability-body p { margin: 0; }

@media (max-width: 540px) {
    .capability-row { flex-direction: column; gap: var(--space-3); }
}

/* ============================================================
   CTA banner
   ============================================================ */

.cta-banner {
    background: linear-gradient(135deg, rgba(43, 108, 255, 0.12), rgba(0, 212, 168, 0.08));
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg);
    padding: var(--space-7);
    text-align: center;
}
.cta-banner h2 { font-size: var(--text-28); margin-bottom: var(--space-3); }
.cta-banner p { max-width: 560px; margin: 0 auto var(--space-5); }

/* ============================================================
   Footer
   ============================================================ */

footer {
    border-top: 1px solid var(--border-subtle);
    padding: var(--space-7) 0;
    margin-top: var(--space-9);
}

.footer-content {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--space-5);
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    font-weight: 700;
    font-size: var(--text-20);
    letter-spacing: 0.04em;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}
.footer-mark { height: 26px; width: auto; }
footer p {
    color: var(--text-muted);
    font-size: var(--text-14);
    margin: var(--space-2) 0 0;
}

/* ============================================================
   Helpers
   ============================================================ */

.text-center { text-align: center; }
.text-mono { font-family: var(--font-mono); }
.text-signal { color: var(--accent-signal); }
.text-secondary { color: var(--text-secondary); }
.mb-0 { margin-bottom: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }

/* Screen-reader-only content */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

/* Whole-card links: suppress default link styling, inherit text color */
.link-quiet {
    text-decoration: none;
    color: inherit;
}

/* Skip-link for accessibility */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--accent-primary);
    color: #fff;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    z-index: 1000;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

/* ============================================================
   Motion layer — scroll reveal, micro-interactions, hero visuals
   Requires site.js. All motion disabled under prefers-reduced-motion.
   ============================================================ */

/* Header elevation once scrolled (class set by site.js) */
#header { transition: box-shadow 0.25s ease, background 0.25s ease; }
#header.scrolled {
    background: rgba(10, 14, 20, 0.95);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

/* Scroll reveal: add .reveal to any element; site.js flips .is-visible */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    will-change: opacity, transform;
}
.reveal.is-visible {
    opacity: 1;
    transform: none;
}

/* Stagger children: reveal delays for grids/lists */
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }
.reveal-delay-5 { transition-delay: 0.40s; }

/* Card + button micro-interactions */
.card, .pillar-card, .contact-item, .process-step, .toolchain-item {
    transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
a.card:hover, .card.card-hover:hover, .pillar-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(43, 108, 255, 0.25);
}

.button {
    transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.15s, box-shadow 0.15s;
}
.button-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(43, 108, 255, 0.35);
}
.button-primary:active { transform: translateY(0); box-shadow: none; }

/* ---- Keyframes for hero technical visuals ---- */

/* Signal flow along an SVG path: use with stroke-dasharray */
@keyframes dash-flow {
    to { stroke-dashoffset: -48; }
}
.anim-dash {
    stroke-dasharray: 6 6;
    animation: dash-flow 1.6s linear infinite;
}
.anim-dash-slow {
    stroke-dasharray: 4 8;
    animation: dash-flow 3.2s linear infinite;
}

/* Node pulse: use on SVG circles */
@keyframes node-pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}
.anim-pulse { animation: node-pulse 2s ease-in-out infinite; }
.anim-pulse-d1 { animation: node-pulse 2s ease-in-out infinite; animation-delay: 0.4s; }
.anim-pulse-d2 { animation: node-pulse 2s ease-in-out infinite; animation-delay: 0.8s; }
.anim-pulse-d3 { animation: node-pulse 2s ease-in-out infinite; animation-delay: 1.2s; }

/* Expanding ping ring: use on SVG circles with transform-box: fill-box */
@keyframes ping-ring {
    0% { transform: scale(0.5); opacity: 0.8; }
    100% { transform: scale(2.2); opacity: 0; }
}
.anim-ping {
    transform-box: fill-box;
    transform-origin: center;
    animation: ping-ring 2.4s cubic-bezier(0, 0, 0.2, 1) infinite;
}

/* Terminal cursor blink */
@keyframes cursor-blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}
.anim-cursor { animation: cursor-blink 1.1s step-end infinite; }

/* Hero visual container: sits under/beside hero copy */
.hero-visual {
    max-width: 720px;
    margin: var(--space-7) auto 0;
    padding: 0 var(--space-5);
}
.hero-visual svg { width: 100%; height: auto; display: block; }
.hero-visual canvas { width: 100%; height: auto; display: block; }
.h1-tagline { display: block; font-size: var(--text-20); font-weight: 400; color: var(--text-secondary); margin-top: var(--space-2); }
.hero-visual-wide { max-width: 860px; }
/* The canvas scene's labels become illegible below tablet width — the
   hero stays text + CTAs there. */
@media (max-width: 768px) { .hero-visual-wide { display: none; } }

/* Card mini-schematic — replaces icon bubbles on key sales cards.
   Small animated SVG diagram in the same blueprint style as hero visuals. */
.card-viz {
    margin-bottom: var(--space-4);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background: rgba(10, 14, 20, 0.5);
    overflow: hidden;
}
.card-viz svg,
.card-viz canvas { display: block; width: 100%; height: auto; }

/* Variant for capability rows (System Origin): fixed-width viz beside text */
.capability-viz {
    flex: 0 0 170px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background: rgba(10, 14, 20, 0.5);
    overflow: hidden;
}
.capability-viz svg,
.capability-viz canvas { display: block; width: 100%; height: auto; }
@media (max-width: 540px) {
    .capability-viz { flex: none; width: 100%; }
}

/* Comparison table (HIL vs VIL vs road test) */
.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    font-size: var(--text-14);
}
.compare-table th, .compare-table td {
    padding: var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
    vertical-align: top;
}
.compare-table thead th {
    font-family: var(--font-mono);
    font-size: var(--text-12);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
}
.compare-table tbody th {
    color: var(--text-primary);
    font-weight: 600;
    white-space: nowrap;
}
.compare-table td { color: var(--text-secondary); }
.compare-table .col-highlight {
    background: rgba(0, 212, 168, 0.05);
    color: var(--text-primary);
}
.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-scroll { overflow-x: auto; border-radius: var(--radius-lg); }

/* Case study block */
.case-study {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-left: 3px solid var(--accent-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}
.case-study .case-tag {
    font-family: var(--font-mono);
    font-size: var(--text-12);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-signal);
    margin-bottom: var(--space-3);
    display: block;
}
.case-study h3 { font-size: var(--text-20); }
.case-study .case-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-4);
}
.case-study .case-metric {
    font-family: var(--font-mono);
    font-size: var(--text-12);
    letter-spacing: 0.1em;
    padding: var(--space-1) var(--space-2);
    border: 1px solid rgba(0, 212, 168, 0.4);
    border-radius: var(--radius-sm);
    color: var(--accent-signal);
    background: rgba(0, 212, 168, 0.06);
}

/* Featured service card (services page lead offering) */
.featured-service {
    background: linear-gradient(135deg, rgba(43, 108, 255, 0.12), rgba(0, 212, 168, 0.08));
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg);
    padding: var(--space-7);
}
.featured-service .featured-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
    margin-top: var(--space-6);
}
@media (max-width: 768px) { .featured-service .featured-grid { grid-template-columns: 1fr; } }
.featured-service .featured-item {
    background: rgba(10, 14, 20, 0.5);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-5);
}
.featured-service .featured-item h3 { font-size: var(--text-16); margin-bottom: var(--space-2); }
.featured-service .featured-item p { font-size: var(--text-14); margin: 0; }

/* Reduced motion: disable all decorative animation */
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
    .anim-dash, .anim-dash-slow, .anim-pulse, .anim-pulse-d1, .anim-pulse-d2,
    .anim-pulse-d3, .anim-ping, .anim-cursor { animation: none; }
    .card, .pillar-card, .button,
    .contact-item, .process-step, .toolchain-item { transition: none; }
    html { scroll-behavior: auto; }
}