html {
    scroll-behavior: smooth;
}

/* Skip links — visible only on focus for keyboard users */
.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 9999;
    padding: 12px 24px;
    background: var(--color-primary, #005c53);
    color: #fff;
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: 0 0 8px 8px;
    text-decoration: none;
    transition: top 0.15s ease;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--color-primary-lighter, #dbf227);
    outline-offset: 2px;
}

:root {
    --nav-link-default: #0f0f0f;
    --nav-link-hover: #71717a;
    --nav-link-active: #005c53;

    /* Page-level tokens */
    --bg-page: #fff;
    --bg-section: rgb(248 247 238 / 80%);
    --bg-card: #fff;
    --bg-nav: transparent;
    --bg-surface: #fafaf9;
    --bg-cta-section: #042940;

    /* Text tokens */
    --text-heading: #042940;
    --text-body: #52525b;
    --text-muted: #71717a;
    --text-faint: #a1a1aa;

    /* Border tokens */
    --border: #e8e7d8;
    --border-card: #e5e7eb;
    --border-nav: #e5e7eb;

    /* Brand tokens */
    --color-primary: #005c53;
    --color-negative: #DC2626;
    --cta-bg: #dbf227;
    --cta-bg-hover: #c8df20;
    --cta-text: #042940;

    /* Theme pill tokens */
    --theme-pill-track: #f3f4f6;
    --theme-btn-active-bg: #fff;

    /* Gradient tokens */
    --gradient-dark-surface: linear-gradient(
        135deg,
        var(--bg-cta-section),
        color-mix(in srgb, var(--bg-cta-section) 80%, #000)
    );
}

[data-theme="dark"] {
    --bg-page: #021824;
    --bg-section: rgb(4 41 64 / 90%);
    --bg-card: #042940;
    --bg-nav: transparent;
    --bg-surface: #031220;
    --bg-cta-section: #010f18;
    --text-heading: #fff;
    --text-body: #b0cdd8;
    --text-muted: #7aadbd;
    --text-faint: #4a7a8a;
    --border: #0a3550;
    --border-card: #0a3550;
    --border-nav: #0a3550;
    --color-primary: #4aada0;
    --color-negative: #ff6b6b;
    --cta-bg: #dbf227;
    --cta-bg-hover: #c8df20;
    --cta-text: #042940;
    --theme-pill-track: #021824;
    --theme-btn-active-bg: #042940;
    --nav-link-default: #b0cdd8;
    --nav-link-hover: #7aadbd;
    --nav-link-active: #4aada0;
}

[data-theme="bw"] {
    --bg-page: #fff;
    --bg-section: #fff;
    --bg-card: #fff;
    --bg-nav: #fff;
    --bg-surface: #fff;
    --bg-cta-section: #000;
    --text-heading: #000;
    --text-body: #000;
    --text-muted: #000;
    --text-faint: #000;
    --border: #000;
    --border-card: #000;
    --border-nav: #000;
    --color-primary: #000;
    --color-negative: #000;
    --cta-bg: #000;
    --cta-bg-hover: #000;
    --cta-text: #fff;
    --theme-pill-track: #f0f0f0;
    --theme-btn-active-bg: #fff;
    --nav-link-default: #000;
    --nav-link-hover: #000;
    --nav-link-active: #000;
    --card-color: #000;
}

body {
    background-color: var(--bg-page);
    color: var(--text-body);
}

/* Semantic color utilities */
html .text-heading {
    color: var(--text-heading);
}

html .text-body {
    color: var(--text-body);
}

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

html .text-faint {
    color: var(--text-faint);
}

html .bg-surface {
    background-color: var(--bg-surface);
}

html .bg-card {
    background-color: var(--bg-card);
}

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

html .bg-white {
    background-color: var(--bg-card);
}

html .border-card {
    border-color: var(--border-card);
}

html .border-nav {
    border-color: var(--border-nav);
}

/* Primary color overrides */
html .text-primary {
    color: var(--color-primary);
}

html .text-primary-70 {
    color: color-mix(in srgb, var(--color-primary) 70%, transparent);
}

html .text-primary-80 {
    color: color-mix(in srgb, var(--color-primary) 80%, transparent);
}

html .text-primary-90 {
    color: color-mix(in srgb, var(--color-primary) 90%, transparent);
}

html .bg-primary {
    background-color: var(--color-primary);
}

html .border-primary {
    border-color: var(--color-primary);
}

/* Override Tailwind's primary-light hover */
html .hover\:bg-primary-light:hover {
    background-color: color-mix(in srgb, var(--color-primary) 85%, #fff);
}

html .hover\:text-primary-light:hover {
    color: color-mix(in srgb, var(--color-primary) 85%, #fff);
}

/* Tailwind body text classes → theme tokens */
html .text-zinc-600 {
    color: var(--text-body);
}

html .text-zinc-500 {
    color: var(--text-muted);
}

html .text-zinc-400 {
    color: var(--text-faint);
}

html .text-stone-400 {
    color: var(--text-faint);
}

/* Tailwind border classes → theme tokens */
html .border-stone-200 {
    border-color: var(--border-card);
}

html .border-stone-200\/60 {
    border-color: var(--border-card);
}

html .border-stone-100 {
    border-color: var(--border);
}

html .hover\:bg-stone-50:hover {
    background-color: var(--bg-surface);
}

html .hover\:border-stone-300:hover {
    border-color: var(--border-card);
}

/* CTA button tokens */
html .bg-cta {
    background-color: var(--cta-bg);
}

html .text-cta {
    color: var(--cta-text);
}

html .hover-bg-cta-hover:hover {
    background-color: var(--cta-bg-hover);
}

/* B&W mode: CTA hover via opacity instead of color change */
[data-theme="bw"] .hover-bg-cta-hover:hover {
    background-color: var(--cta-bg);
    opacity: 0.85;
}

/* Feature/step/integration icon gradient background */
.gradient-icon-bg {
    background: linear-gradient(
        135deg,
        var(--bg-cta-section),
        color-mix(in srgb, var(--bg-cta-section) 70%, rgb(219 242 39 / 25%))
    );
}

.step-circle {
    border: 2px solid #dbf227;
}

[data-theme="bw"] .step-circle {
    border-color: #000;
}

[data-theme="dark"] .gradient-icon-bg {
    background: linear-gradient(
        135deg,
        #0a2a3c,
        color-mix(in srgb, #0a2a3c 70%, rgb(219 242 39 / 25%))
    );
}

[data-theme="bw"] .gradient-icon-bg {
    background: #000;
}

/* Hero entrance animations (page load, CSS-driven) */
@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-reveal {
    opacity: 0;
    animation: fade-up 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero-delay-1 {
    animation-delay: 0.06s;
}

.hero-delay-2 {
    animation-delay: 0.18s;
}

.hero-delay-3 {
    animation-delay: 0.3s;
}

.hero-delay-4 {
    animation-delay: 0.44s;
}

.hero-delay-5 {
    animation-delay: 0.58s;
}

.hero-delay-6 {
    animation-delay: 0.26s;
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition:
        opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delay helpers for scroll reveal */
.reveal-delay-1 {
    transition-delay: 0.1s;
}

.reveal-delay-2 {
    transition-delay: 0.2s;
}

.reveal-delay-3 {
    transition-delay: 0.3s;
}

.reveal-delay-4 {
    transition-delay: 0.4s;
}

/* Typing indicator */
@keyframes typing-dot {
    0%,
    60%,
    100% {
        opacity: 0.3;
    }

    30% {
        opacity: 1;
    }
}

.typing-dot {
    animation: typing-dot 1.4s infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

/* Modal */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgb(8 8 8 / 70%);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition:
        opacity 0.2s ease,
        visibility 0.2s ease;
    backdrop-filter: blur(8px);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-surface);
    border-radius: 16px;
    max-width: 480px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(12px);
    transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1);
    box-shadow:
        0 32px 80px rgb(0 0 0 / 35%),
        0 0 0 1px rgb(0 0 0 / 5%);
}

.modal-backdrop.active .modal-content {
    transform: translateY(0);
}

/* Use-case demo modal — wider */
.modal-content.demo-modal {
    max-width: 720px;
}

/* FAQ animation */
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition:
        max-height 0.35s ease,
        padding 0.35s ease;
    padding-top: 0;
    padding-bottom: 0;
}

.faq-answer.open {
    max-height: 500px;
    padding-bottom: 18px;
}

/* FAQ icon rotation when open */
.faq-toggle[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

/* Use case card — corner ribbon tab */
.usecase-bubble {
    display: flex;
    flex-direction: column;
}

.usecase-bubble > div:first-child {
    position: relative;
    overflow: hidden;
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    align-items: flex-start;
}

.usecase-card-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin-top: 0.5rem;
    margin-left: auto;
    transform: translateY(0);
    align-self: flex-end;
    padding: 0.55rem 0.9rem;
    border: 1px solid color-mix(in srgb, var(--card-color, var(--text-muted)) 30%, white);
    border-radius: 9999px;
    background: color-mix(in srgb, var(--card-color, var(--text-muted)) 10%, white);
    color: var(--card-color, var(--text-muted));
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
}

.usecase-bubble:hover .usecase-card-cta {
    background: var(--card-color, var(--text-muted));
    border-color: var(--card-color, var(--text-muted));
    color: #fff;
    transform: translateX(2px);
}

/* B&W mode: collapse per-card accent colors */
[data-theme="bw"] .usecase-card-cta {
    background: #000 !important;
    color: #fff !important;
    border-color: #000 !important;
}

/* Dark mode: feature card backgrounds */
[data-theme="dark"] #features .bg-card {
    background-color: #071723;
}

/* Dark mode: use-case subtitle badge */
[data-theme="dark"] #usecases .rounded-full {
    background-color: #091b26;
    border-color: var(--border-card);
    color: var(--text-body);
}

/* Dark mode: use-case card backgrounds */
[data-theme="dark"] .usecase-bubble > div:first-child {
    background-color: #071723;
    border-color: var(--border-card);
}

[data-theme="dark"] .usecase-bubble > div:first-child:hover {
    background-color: #0a1f2e;
}

[data-theme="bw"] .usecase-bubble {
    --card-color: #000 !important;

    background: #fff !important;
}

/* B&W mode: disable glass effect on nav */
[data-theme="bw"] .nav-glass {
    backdrop-filter: none;
}

/* B&W mode: hide hero background crystal */
[data-theme="bw"] #hero svg[data-crystal] {
    display: none;
}

/* B&W mode: remove lime glow from CTA buttons */
[data-theme="bw"] .demo-request-btn {
    box-shadow: none !important;
}

/* B&W mode: invert CTA button in dark CTA section */
[data-theme="bw"] #cta .demo-request-btn {
    background-color: #fff;
    color: #000;
}

/* FAQ divider color & theme transition */
.faq-list-divider > :not(:last-child) {
    border-color: var(--border);
    transition:
        background-color 0.2s ease,
        color 0.2s ease,
        border-color 0.2s ease;
}

/* Comparison cards — theme-aware colors */
.comparison-bad {
    border-color: color-mix(in srgb, var(--color-negative) 20%, transparent);
    background: color-mix(in srgb, var(--color-negative) 5%, var(--bg-card));
}

.comparison-bad h3,
.comparison-bad svg {
    color: var(--color-negative);
}

.comparison-bad .comparison-icon {
    background: color-mix(in srgb, var(--color-negative) 10%, var(--bg-card));
}

.comparison-good {
    border-color: color-mix(in srgb, var(--color-primary) 25%, transparent);
    background: color-mix(in srgb, var(--color-primary) 6%, var(--bg-card));
}

.comparison-good h3,
.comparison-good svg {
    color: var(--color-primary);
}

.comparison-good .comparison-icon {
    background: color-mix(in srgb, var(--color-primary) 15%, var(--bg-card));
}

/* B&W mode: comparison cards — use border weight to distinguish */
[data-theme="bw"] .comparison-bad {
    border-color: #000;
    border-style: dashed;
    background: var(--bg-card);
}

[data-theme="bw"] .comparison-good {
    border-color: #000;
    border-width: 2px;
    background: var(--bg-card);
}

[data-theme="bw"] .comparison-bad h3,
[data-theme="bw"] .comparison-bad svg,
[data-theme="bw"] .comparison-good h3,
[data-theme="bw"] .comparison-good svg {
    color: #000;
}

[data-theme="bw"] .comparison-bad .comparison-icon,
[data-theme="bw"] .comparison-good .comparison-icon {
    background: #f0f0f0;
}

/* Pricing check icons in B&W */
[data-theme="bw"] #pricing svg {
    color: #000;
}

/* Pricing outline buttons (Starter + Enterprise) */
.pricing-outline-btn {
    border-color: var(--text-heading);
    color: var(--text-heading);
}

.pricing-outline-btn:hover {
    background-color: var(--text-heading);
    color: var(--bg-page);
}

/* Growth plan highlight card */
.pricing-highlight-card {
    background: var(--gradient-dark-surface);
}

/* Navigation glass effect */
.nav-glass {
    background-color: var(--bg-nav);
    border: 1px solid var(--border-nav);
    will-change: transform;
    isolation: isolate;
}

/* Navigation scrolled state — works with floating nav */
.nav-link {
    color: var(--nav-link-default);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    background: transparent;
}

.nav-link:hover {
    color: var(--nav-link-hover);
}

.nav-link.is-active,
.nav-link[aria-current="location"] {
    color: var(--nav-link-active);
    background-color: var(--bg-card);
}

.nav-link.is-active:hover,
.nav-link[aria-current="location"]:hover {
    color: var(--nav-link-active);
}

.mobile-nav-link {
    display: block;
}

nav.scrolled {
    padding-top: 0.5rem;
}

nav.scrolled > div > div:first-child {
    box-shadow: 0 8px 24px rgb(0 0 0 / 10%);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .hero-reveal,
    .reveal {
        animation: none;
        opacity: 1;
        transform: none;
        transition: none;
    }

    .crystal-bg-rotate {
        animation: none;
        will-change: auto;
    }
}

@keyframes crystal-bg-spin {
    from {
        transform: rotate(180deg);
    }

    to {
        transform: rotate(-180deg);
    }
}

.crystal-bg-rotate {
    animation: crystal-bg-spin 120s linear infinite;
    will-change: transform;
}

/* Theme switcher pill */
.theme-pill {
    display: flex;
    background: var(--theme-pill-track);
    border-radius: 9999px;
    padding: 3px;
    gap: 2px;
}

.theme-btn {
    background: none;
    border: none;
    border-radius: 9999px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-heading);
    opacity: 0.45;
    transition:
        opacity 0.15s,
        background-color 0.15s,
        box-shadow 0.15s;
}

.theme-btn--active {
    background: var(--theme-btn-active-bg);
    box-shadow: 0 1px 4px rgb(0 0 0 / 15%);
    opacity: 1;
}

/* Theme color transition — targeted instead of wildcard (*) to avoid the browser
   tracking transition state on hundreds of elements. Saved ~5-10% idle CPU over the wildcard when applied. */
body,
footer,
.nav-glass,
.nav-link,
.bg-card,
.bg-section,
.demo-request-btn,
.pricing-highlight-card,
.usecase-bubble,
.usecase-bubble > div:first-child,
.usecase-card-cta,
.comparison-bad,
.comparison-good,
.demo-msg-advisor,
.demo-msg-customer,
.demo-product-card,
#usecases .rounded-full {
    transition:
        background-color 0.2s ease,
        color 0.2s ease,
        border-color 0.2s ease,
        transform 0.2s ease;
}

/* Dark mode: comparison cards inside demo chat */
[data-theme="dark"] .demo-msg-advisor .bg-white\/60 {
    background-color: #071723;
}

[data-theme="dark"] .demo-msg-advisor .text-stone-500 {
    color: #8a9baa;
}

/* Demo chat message theming */
.demo-msg-advisor {
    background-color: color-mix(
        in srgb,
        var(--color-primary) 10%,
        var(--bg-card)
    );
    color: var(--text-heading);
}

.demo-msg-customer {
    background-color: var(--bg-surface);
    color: var(--text-body);
}

.demo-product-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-card);
}

/* Mobile product slider */
#demo-product-list-mobile {
    scrollbar-width: none;
}

#demo-product-list-mobile > div {
    flex: 0 0 120px;
    scroll-snap-align: start;
}

@media (width <= 768px) {
    .crystal-bg-rotate {
        animation: none;
        will-change: auto;
    }
}

@media (width <= 767px) {
    .modal-content {
        width: 95%;
        max-height: 85vh;
    }

    .modal-content.demo-modal {
        max-width: 95%;
    }
}