/* PCM marketing site - ZLDA-aligned design system */

:root {
    /* Light mode (ZLDA palette) */
    --color-bg-rgb: 248 250 252;
    --color-bg-secondary-rgb: 241 245 249;
    --color-surface-rgb: 255 255 255;
    --color-text-rgb: 10 10 10;
    --color-text-muted-rgb: 82 82 91;
    --color-border-rgb: 15 23 42;
    --color-accent-rgb: 14 116 144;
    --color-accent-dark-rgb: 21 94 117;

    --font-sans: "Inter Tight", Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    --container: 1180px;
    --radius: 14px;
    --radius-sm: 8px;
}

/* Dark mode opt-in only (no automatic OS preference flip). */
[data-theme="dark"] {
    --color-bg-rgb: 10 10 10;
    --color-bg-secondary-rgb: 22 22 22;
    --color-surface-rgb: 26 26 26;
    --color-text-rgb: 250 250 250;
    --color-text-muted-rgb: 161 161 170;
    --color-border-rgb: 250 250 250;
    --color-accent-rgb: 34 211 238;
    --color-accent-dark-rgb: 103 232 249;
}

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

html, body { margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: rgb(var(--color-bg-rgb));
    background-image: radial-gradient(rgb(var(--color-border-rgb) / .05) 1px, transparent 1px);
    background-size: 22px 22px;
    background-position: 0 0;
    color: rgb(var(--color-text-rgb));
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

[data-theme="dark"] body {
    background-image: radial-gradient(rgb(var(--color-border-rgb) / .035) 1px, transparent 1px);
}

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

/* Layout */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Nav */
.nav {
    border-bottom: 1px solid rgb(var(--color-border-rgb) / .08);
    background: rgb(var(--color-bg-rgb) / .92);
    backdrop-filter: saturate(180%) blur(8px);
    position: sticky;
    top: 0;
    z-index: 50;
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.wordmark {
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -.01em;
    color: rgb(var(--color-text-rgb));
    display: inline-flex;
    align-items: center;
    gap: .5rem;
}
.wordmark .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgb(var(--color-accent-rgb));
    display: inline-block;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.nav-link {
    font-size: .9rem;
    color: rgb(var(--color-text-muted-rgb));
    transition: color .15s ease;
}
.nav-link:hover { color: rgb(var(--color-text-rgb)); }

/* Theme toggle */
.theme-toggle {
    background: transparent;
    border: 1px solid rgb(var(--color-border-rgb) / .15);
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: rgb(var(--color-text-rgb));
    transition: border-color .15s ease, color .15s ease;
}
.theme-toggle:hover {
    border-color: rgb(var(--color-accent-rgb));
    color: rgb(var(--color-accent-rgb));
}
.theme-toggle svg {
    width: 16px;
    height: 16px;
    display: block;
}
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Buttons */
.btn {
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .75rem 1.25rem;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: .95rem;
    font-weight: 500;
    line-height: 1;
    cursor: pointer;
    border: 1px solid transparent;
    transform: translateY(0);
    transition: background-color .15s ease, color .15s ease, border-color .15s ease, box-shadow .18s ease, transform .18s ease;
    text-decoration: none;
}
.btn:hover {
    transform: translateY(-1px);
}
.btn:active {
    transform: translateY(0) scale(.985);
}
.btn-primary {
    background: rgb(var(--color-accent-rgb));
    color: rgb(var(--color-surface-rgb));
    box-shadow: 0 10px 24px rgb(var(--color-accent-rgb) / .16);
}
.btn-primary:hover {
    background: rgb(var(--color-accent-dark-rgb));
    color: rgb(var(--color-surface-rgb));
    box-shadow: 0 12px 28px rgb(var(--color-accent-rgb) / .22);
}
.btn-secondary {
    background: transparent;
    color: rgb(var(--color-text-rgb));
    border-color: rgb(var(--color-border-rgb) / .15);
}
.btn-secondary:hover {
    border-color: rgb(var(--color-accent-rgb));
    color: rgb(var(--color-accent-rgb));
}
.btn-ghost {
    background: transparent;
    color: rgb(var(--color-accent-rgb));
    padding: .75rem 0;
}
.btn-ghost:hover { color: rgb(var(--color-accent-dark-rgb)); }
.btn-ghost::after {
    content: " \2192";
    transition: transform .15s ease;
    display: inline-block;
}
.btn-ghost:hover::after { transform: translateX(3px); }

/* Hero */
.hero {
    padding: 3.5rem 0 2.5rem;
    position: relative;
    isolation: isolate;
}
.hero::before {
    content: "";
    position: absolute;
    top: -120px;
    left: 50%;
    transform: translateX(-50%);
    width: min(1100px, 110%);
    height: 520px;
    background: radial-gradient(ellipse at center, rgb(var(--color-accent-rgb) / .08), transparent 60%);
    pointer-events: none;
    z-index: -1;
}
[data-theme="dark"] .hero::before {
    background: radial-gradient(ellipse at center, rgb(var(--color-accent-rgb) / .12), transparent 65%);
}
.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: .75rem;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: rgb(var(--color-accent-rgb));
    margin-bottom: .75rem;
}
.hero h1 {
    font-size: clamp(2.25rem, 5.5vw, 3.75rem);
    line-height: 1.05;
    letter-spacing: -.025em;
    font-weight: 600;
    margin: 0 0 .875rem;
    max-width: 22ch;
}
.hero h1 .accent {
    color: rgb(var(--color-accent-rgb));
}
.hero-sub {
    font-size: 1.125rem;
    color: rgb(var(--color-text-muted-rgb));
    max-width: 56ch;
    margin: 0 0 1.25rem;
}
.hero-cta {
    display: flex;
    gap: .75rem;
    flex-wrap: wrap;
}

/* Section spacing */
.section {
    padding: 2.5rem 0;
    border-top: 1px solid rgb(var(--color-border-rgb) / .06);
}
.section-eyebrow {
    font-family: var(--font-mono);
    font-size: .7rem;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: rgb(var(--color-text-muted-rgb));
    margin: 0 0 .5rem;
}
.section h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.25rem);
    line-height: 1.15;
    letter-spacing: -.02em;
    font-weight: 600;
    margin: 0 0 1.25rem;
    max-width: 28ch;
}

/* Demo card */
.demo {
    position: relative;
    overflow: hidden;
    background: rgb(var(--color-surface-rgb));
    border: 1px solid rgb(var(--color-border-rgb) / .08);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    box-shadow: 0 18px 54px rgb(var(--color-border-rgb) / .04);
    transition: border-color .24s ease, box-shadow .24s ease, transform .24s ease;
}
.demo.is-spotlight {
    animation: demo-spotlight 1.1s cubic-bezier(.2, .8, .2, 1);
}
@media (min-width: 768px) {
    .demo { grid-template-columns: 1fr 1fr; }
}
.demo-inputs h3, .demo-outputs h3 {
    font-size: .8rem;
    font-family: var(--font-mono);
    letter-spacing: .08em;
    text-transform: uppercase;
    color: rgb(var(--color-text-muted-rgb));
    margin: 0 0 .875rem;
    font-weight: 500;
}
.demo-field {
    margin-bottom: .75rem;
}
.demo-field label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: .875rem;
    color: rgb(var(--color-text-rgb));
    margin-bottom: .375rem;
    font-weight: 500;
}
.demo-field label .hint {
    font-size: .75rem;
    color: rgb(var(--color-text-muted-rgb));
    font-weight: 400;
}
.demo-field input[type="number"],
.demo-field input[type="text"] {
    width: 100%;
    padding: .625rem .75rem;
    font: inherit;
    font-size: .95rem;
    border: 1px solid rgb(var(--color-border-rgb) / .12);
    border-radius: var(--radius-sm);
    background: rgb(var(--color-bg-rgb));
    color: rgb(var(--color-text-rgb));
    transition: background-color .15s ease, border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}
.demo-field input:focus {
    outline: none;
    border-color: rgb(var(--color-accent-rgb));
    box-shadow: 0 0 0 3px rgb(var(--color-accent-rgb) / .12);
    transform: translateY(-1px);
}
.demo-field-row {
    display: flex;
    align-items: center;
    gap: .5rem;
}
.demo-field-row .prefix {
    color: rgb(var(--color-text-muted-rgb));
    font-family: var(--font-mono);
    font-size: .9rem;
}

.demo-outputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 1.25rem;
    row-gap: .25rem;
    align-content: start;
}
.demo-outputs h3 { grid-column: 1 / -1; }
.demo-kpi {
    padding: .875rem 0;
}
.demo-kpi-label {
    font-size: .8rem;
    color: rgb(var(--color-text-muted-rgb));
    margin-bottom: .25rem;
}
.demo-kpi-value {
    font-size: 1.875rem;
    font-weight: 600;
    letter-spacing: -.02em;
    font-variant-numeric: tabular-nums;
    color: rgb(var(--color-text-rgb));
    transform-origin: left center;
}
.demo-kpi-value.is-updating {
    animation: kpi-settle .34s cubic-bezier(.2, .8, .2, 1);
}
.demo-kpi-value.accent { color: rgb(var(--color-accent-rgb)); }
.demo-kpi-sub {
    font-size: .8rem;
    font-family: var(--font-mono);
    color: rgb(var(--color-text-muted-rgb));
    margin-top: .25rem;
}

.demo-callout {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: .5rem;
    padding-top: .875rem;
    border-top: 1px solid rgb(var(--color-border-rgb) / .08);
}
.demo-callout-text {
    margin: 0;
    color: rgb(var(--color-text-muted-rgb));
    font-size: .85rem;
    flex: 1;
}
.demo-callout-link {
    flex-shrink: 0;
    white-space: nowrap;
    padding: .5rem .9rem;
    border-radius: var(--radius-sm);
    background: rgb(var(--color-accent-rgb));
    color: rgb(var(--color-surface-rgb));
    font-size: .875rem;
    font-weight: 500;
    text-decoration: none;
    transform: translateY(0);
    transition: background-color .15s ease, box-shadow .18s ease, transform .18s ease;
}
.demo-callout-link:hover {
    background: rgb(var(--color-accent-dark-rgb));
    color: rgb(var(--color-surface-rgb));
    box-shadow: 0 10px 22px rgb(var(--color-accent-rgb) / .16);
    transform: translateY(-1px);
}
.demo-callout-link:active {
    transform: translateY(0) scale(.985);
}

@keyframes demo-spotlight {
    0% {
        border-color: rgb(var(--color-border-rgb) / .08);
        box-shadow: 0 18px 54px rgb(var(--color-border-rgb) / .04);
        transform: translateY(0);
    }
    28% {
        border-color: rgb(var(--color-accent-rgb) / .48);
        box-shadow: 0 24px 60px rgb(var(--color-accent-rgb) / .16);
        transform: translateY(-3px);
    }
    100% {
        border-color: rgb(var(--color-border-rgb) / .08);
        box-shadow: 0 18px 54px rgb(var(--color-border-rgb) / .04);
        transform: translateY(0);
    }
}

@keyframes kpi-settle {
    0% { transform: translateY(2px); opacity: .76; }
    100% { transform: translateY(0); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    .btn,
    .btn-ghost::after,
    .demo,
    .demo-field input[type="number"],
    .demo-field input[type="text"],
    .demo-callout-link {
        transition: none;
    }
    .btn:hover,
    .btn:active,
    .demo-field input:focus,
    .btn-ghost:hover::after,
    .demo-callout-link:hover,
    .demo-callout-link:active {
        transform: none;
    }
    .demo.is-spotlight,
    .demo-kpi-value.is-updating {
        animation: none;
    }
}
@media (max-width: 640px) {
    .demo-callout {
        flex-direction: column;
        align-items: flex-start;
        gap: .75rem;
    }
}

/* Feature grid */
.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}
@media (min-width: 700px) {
    .feature-grid { grid-template-columns: repeat(3, 1fr); }
}
.feature {
    border-top: 1px solid rgb(var(--color-border-rgb) / .12);
    padding-top: 1rem;
}
.feature h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 0 0 .5rem;
    letter-spacing: -.01em;
}
.feature p {
    margin: 0;
    color: rgb(var(--color-text-muted-rgb));
    font-size: .95rem;
}

/* Screenshot */
.screenshot {
    border: 1px solid rgb(var(--color-border-rgb) / .08);
    border-radius: var(--radius);
    overflow: hidden;
    background: rgb(var(--color-surface-rgb));
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgb(var(--color-text-muted-rgb));
    font-family: var(--font-mono);
    font-size: .85rem;
}
.screenshot a {
    display: block;
    text-align: center;
}
.screenshot img {
    width: 100%;
    height: auto;
    display: block;
}

/* CTA strip */
.cta-strip {
    text-align: center;
    padding: 3rem 0;
}
.cta-strip h2 {
    margin: 0 auto 1rem;
    max-width: 22ch;
}
.cta-strip .hero-sub {
    margin: 0 auto 1.25rem;
}
.cta-strip .hero-cta {
    justify-content: center;
}

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    margin-top: 1.25rem;
}
@media (min-width: 900px) {
    .pricing-grid { grid-template-columns: repeat(3, 1fr); }
}
.tier {
    background: rgb(var(--color-surface-rgb));
    border: 1px solid rgb(var(--color-border-rgb) / .08);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}
.tier.featured {
    border-color: rgb(var(--color-accent-rgb));
}
.tier-name {
    font-size: .8rem;
    font-family: var(--font-mono);
    letter-spacing: .08em;
    text-transform: uppercase;
    color: rgb(var(--color-accent-rgb));
    margin-bottom: .75rem;
    font-weight: 500;
}
.tier-positioning {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -.01em;
    margin: 0 0 1rem;
}
.tier-includes {
    list-style: none;
    padding: 0;
    margin: 0 0 1.25rem;
    flex: 1;
}
.tier-includes li {
    padding: .5rem 0;
    border-bottom: 1px solid rgb(var(--color-border-rgb) / .06);
    color: rgb(var(--color-text-rgb));
    font-size: .925rem;
    display: flex;
    align-items: flex-start;
    gap: .625rem;
}
.tier-includes li::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgb(var(--color-accent-rgb));
    margin-top: .55rem;
    flex-shrink: 0;
}
.tier .btn { width: 100%; }

/* Form */
.form-card {
    background: rgb(var(--color-surface-rgb));
    border: 1px solid rgb(var(--color-border-rgb) / .08);
    border-radius: var(--radius);
    padding: 1.5rem;
    max-width: 560px;
    margin: 1.25rem auto 0;
}
.form-field {
    margin-bottom: 1rem;
}
.form-field label {
    display: block;
    font-size: .875rem;
    font-weight: 500;
    margin-bottom: .375rem;
}
.form-field input,
.form-field select,
.form-field textarea {
    width: 100%;
    padding: .625rem .75rem;
    font: inherit;
    font-size: .95rem;
    border: 1px solid rgb(var(--color-border-rgb) / .12);
    border-radius: var(--radius-sm);
    background: rgb(var(--color-bg-rgb));
    color: rgb(var(--color-text-rgb));
}
.form-field textarea { min-height: 120px; resize: vertical; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    outline: none;
    border-color: rgb(var(--color-accent-rgb));
}
.form-honeypot {
    position: absolute;
    left: -9999px;
}
.form-success {
    background: rgb(var(--color-accent-rgb) / .08);
    border: 1px solid rgb(var(--color-accent-rgb) / .25);
    color: rgb(var(--color-accent-dark-rgb));
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    max-width: 560px;
    margin: 1.25rem auto 0;
}

/* Footer */
.footer {
    border-top: 1px solid rgb(var(--color-border-rgb) / .08);
    padding: 2rem 0 1.5rem;
    color: rgb(var(--color-text-muted-rgb));
    font-size: .875rem;
}
.footer-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: space-between;
    align-items: center;
}
.footer-links {
    display: flex;
    gap: 1.25rem;
}
.footer-links a {
    color: rgb(var(--color-text-muted-rgb));
}
.footer-links a:hover { color: rgb(var(--color-text-rgb)); }

/* Mobile tweaks */
@media (max-width: 480px) {
    .hero { padding: 2.5rem 0 2rem; }
    .section { padding: 2rem 0; }
    .cta-strip { padding: 2.5rem 0; }
    .demo { padding: 1.25rem; }
    .tier { padding: 1.25rem; }
    .nav-link.hide-sm { display: none; }
}