/* ==========================================================================
   LANDING — secciones y mockups de producto
   ========================================================================== */

/* --------------------------------------------------------------------------
   Header / navbar
   -------------------------------------------------------------------------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: var(--color-glass);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header.is-stuck {
    border-bottom-color: var(--color-border);
    box-shadow: 0 1px 3px var(--color-shadow-sm);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    height: 4.5rem;
}

.brand > a {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1.063rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-ink);
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background-color: var(--color-brand);
    color: var(--color-invert);
}

.brand-mark svg {
    width: 19px;
    height: 19px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
    flex: 1;
    justify-content: space-between;
}

.nav ul {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    font-size: 0.938rem;
    font-weight: 500;
}

.nav ul a {
    color: var(--color-body);
    transition: color 0.15s ease;
}

.nav ul a:hover {
    color: var(--color-ink);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.nav-toggle {
    display: none;
}

.nav-toggle button {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 0 0.688rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background-color: var(--color-surface);
}

.nav-toggle span {
    display: block;
    height: 2px;
    border-radius: 2px;
    background-color: var(--color-ink);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle button[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle button[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle button[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.section-hero {
    position: relative;
    padding: 5.5rem 0 7rem;
    overflow: hidden;
}

.section-hero::before {
    content: "";
    position: absolute;
    top: -18rem;
    left: 50%;
    width: 72rem;
    height: 42rem;
    transform: translateX(-50%);
    background: radial-gradient(closest-side, var(--color-brand-soft), transparent 70%);
    pointer-events: none;
}

.hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
    gap: 4rem;
}

.hero-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
}

.hero-title {
    max-width: 14ch;
}

.hero-title span {
    color: var(--color-brand);
}

.hero-subtitle {
    max-width: 46ch;
    font-size: 1.188rem;
}

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

/* --------------------------------------------------------------------------
   Hero — mockup de navegador + teléfono
   -------------------------------------------------------------------------- */

.hero-visual {
    position: relative;
    padding: 0 0 2rem 0;
}

.mockup-browser {
    border: 1px solid var(--color-border);
    border-radius: 16px;
    background-color: var(--color-surface);
    box-shadow: 0 2px 6px var(--color-shadow-sm), 0 40px 80px -40px var(--color-shadow-lg);
    overflow: hidden;
}

.mockup-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-surface-alt);
}

.mockup-dots {
    display: flex;
    gap: 0.375rem;
}

.mockup-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--color-border-strong);
}

.mockup-url {
    flex: 1;
    padding: 0.313rem 0.75rem;
    border-radius: 999px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mockup-url b {
    color: var(--color-ink);
    font-weight: 600;
}

.mockup-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.25rem;
}

.shop-head {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.shop-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background-color: var(--color-ink);
    color: var(--color-invert);
    font-size: 0.938rem;
    font-weight: 700;
}

.shop-meta {
    display: flex;
    flex-direction: column;
}

.shop-meta h3 {
    font-size: 1rem;
}

.shop-meta p {
    font-size: 0.75rem;
    color: var(--color-muted);
}

.chip-row,
.chip-row ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.chip-row li {
    padding: 0.25rem 0.688rem;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: 0.75rem;
    color: var(--color-body);
}

.chip-row li:first-child {
    background-color: var(--color-ink);
    border-color: var(--color-ink);
    color: var(--color-invert);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.product-card {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-bottom: 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    background-color: var(--color-surface);
}

.product-thumb {
    position: relative;
    aspect-ratio: 4 / 3;
    background-color: var(--color-surface-sunken);
    background-image: linear-gradient(135deg, var(--color-surface-sunken), var(--color-brand-soft));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-border-strong);
}

.product-thumb svg {
    width: 30%;
    height: auto;
}

.product-tag {
    position: absolute;
    top: 0.375rem;
    left: 0.375rem;
    padding: 0.125rem 0.438rem;
    border-radius: 999px;
    background-color: var(--color-ink);
    color: var(--color-invert);
    font-size: 0.625rem;
    font-weight: 600;
}

.product-info {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    padding: 0 0.625rem;
}

.product-info h4 {
    font-size: 0.75rem;
    font-weight: 600;
}

.product-info p {
    font-size: 0.813rem;
    font-weight: 700;
    color: var(--color-brand-strong);
}

.product-action {
    padding: 0 0.625rem;
}

.product-action span {
    display: block;
    padding: 0.25rem;
    border-radius: 8px;
    background-color: var(--color-whatsapp);
    color: var(--color-invert);
    font-size: 0.625rem;
    font-weight: 600;
    text-align: center;
}

.mockup-phone {
    position: absolute;
    right: -1.5rem;
    bottom: 0;
    width: 168px;
    padding: 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: 26px;
    background-color: var(--color-surface);
    box-shadow: 0 2px 6px var(--color-shadow-sm), 0 30px 60px -30px var(--color-shadow-lg);
}

.phone-screen {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.75rem 0.5rem 0.5rem;
    border-radius: 20px;
    background-color: var(--color-surface-alt);
}

.phone-notch {
    width: 42px;
    height: 4px;
    margin: 0 auto;
    border-radius: 999px;
    background-color: var(--color-border-strong);
}

.phone-screen .product-grid {
    grid-template-columns: 1fr;
}

.hero-chips {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-chip {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background-color: var(--color-surface);
    box-shadow: 0 8px 24px -12px var(--color-shadow-lg);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-ink);
    white-space: nowrap;
    animation: chip-float 6s ease-in-out infinite;
}

.hero-chip span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 7px;
    background-color: var(--color-brand-soft);
    color: var(--color-brand-strong);
}

.hero-chip span svg {
    width: 13px;
    height: 13px;
}

.hero-chip-a {
    top: 1.5rem;
    left: -2.5rem;
    animation-delay: 0s;
}

.hero-chip-b {
    top: 45%;
    left: -3.5rem;
    animation-delay: 1.2s;
}

.hero-chip-c {
    right: -1rem;
    top: -1rem;
    animation-delay: 2.4s;
}

@keyframes chip-float {
    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-8px);
    }
}

/* --------------------------------------------------------------------------
   Social proof
   -------------------------------------------------------------------------- */

.proof {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
    text-align: center;
}

.proof-label h2 {
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-muted);
}

.stat-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    width: 100%;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1.25rem 1rem;
    border-radius: 16px;
    background-color: var(--color-surface-alt);
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-ink);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-body);
}

/* --------------------------------------------------------------------------
   Beneficios
   -------------------------------------------------------------------------- */

.benefit-card {
    gap: 1.25rem;
}

.benefit-card h3 {
    font-size: 1.063rem;
}

/* --------------------------------------------------------------------------
   Demo del producto
   -------------------------------------------------------------------------- */

.demo {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.demo-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.375rem;
    border: 1px solid var(--color-invert-line);
    border-radius: 14px;
    background-color: var(--color-glass-dark);
    align-self: center;
}

.demo-tabs button {
    padding: 0.563rem 1rem;
    border-radius: 10px;
    color: var(--color-invert-soft);
    font-size: 0.875rem;
    font-weight: 600;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.demo-tabs button:hover {
    color: var(--color-invert);
}

.demo-tabs button[aria-selected="true"] {
    background-color: var(--color-invert);
    color: var(--color-ink);
}

.demo-stage {
    border: 1px solid var(--color-invert-line);
    border-radius: 20px;
    background-color: var(--color-surface);
    box-shadow: 0 40px 90px -50px rgba(0, 0, 0, 0.9);
    overflow: hidden;
}

.demo-panel[hidden] {
    display: none !important;
}

.demo-flow,
.demo-flow ul {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.demo-flow {
    color: var(--color-invert-soft);
    font-size: 0.875rem;
}

.demo-flow li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.demo-flow li:not(:last-child)::after {
    content: "→";
    color: var(--color-brand);
}

/* Mockup de la aplicación (dashboard) */

.mockup-app {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    min-height: 420px;
}

.app-side {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding: 1.25rem 1rem;
    border-right: 1px solid var(--color-border);
    background-color: var(--color-surface-alt);
}

.app-side-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-ink);
}

.app-side-brand .brand-mark {
    width: 26px;
    height: 26px;
    border-radius: 8px;
}

.app-side-brand .brand-mark svg {
    width: 15px;
    height: 15px;
}

.app-menu,
.app-menu ul {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.app-menu {
    font-size: 0.813rem;
}

.app-menu li {
    padding: 0.5rem 0.688rem;
    border-radius: 9px;
    color: var(--color-body);
}

.app-menu li[aria-current] {
    background-color: var(--color-surface);
    color: var(--color-ink);
    font-weight: 600;
    box-shadow: 0 1px 2px var(--color-shadow-sm);
}

.app-main {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding: 1.5rem;
}

.app-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.app-head h3 {
    font-size: 1.125rem;
}

.app-head p {
    font-size: 0.813rem;
    color: var(--color-muted);
}

.app-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
}

.app-stat {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    padding: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
}

.app-stat h4 {
    font-size: 1.25rem;
}

.app-stat p {
    font-size: 0.75rem;
    color: var(--color-muted);
}

.app-table {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    font-size: 0.813rem;
}

.app-row {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.75rem;
    padding: 0.688rem 0.875rem;
    border-bottom: 1px solid var(--color-border);
}

.app-row:last-child {
    border-bottom: 0;
}

.app-row-head {
    background-color: var(--color-surface-alt);
    color: var(--color-muted);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.app-row-product {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    min-width: 0;
}

.app-thumb {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background-image: linear-gradient(135deg, var(--color-surface-sunken), var(--color-brand-soft));
}

.app-row-product h4 {
    font-size: 0.813rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.app-form {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 1.25rem;
}

.app-fields {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.app-field {
    display: flex;
    flex-direction: column;
    gap: 0.313rem;
}

.app-field h5 {
    font-size: 0.75rem;
    color: var(--color-muted);
    font-weight: 600;
}

.app-input {
    padding: 0.563rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 9px;
    background-color: var(--color-surface-alt);
    font-size: 0.813rem;
    color: var(--color-ink);
}

.app-input-tall {
    min-height: 4.5rem;
}

.app-uploader {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.app-upload-slot {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1 / 1;
    border: 1px dashed var(--color-border-strong);
    border-radius: 10px;
    color: var(--color-muted);
    background-image: linear-gradient(135deg, var(--color-surface-sunken), var(--color-brand-soft));
}

.app-upload-slot svg {
    width: 20px;
    height: 20px;
}

.app-upload-empty {
    background-image: none;
}

/* --------------------------------------------------------------------------
   Cómo funciona
   -------------------------------------------------------------------------- */

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    counter-reset: paso;
}

.step {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-top: 2rem;
    border-top: 2px solid var(--color-border);
}

.step-number {
    position: absolute;
    top: -0.938rem;
    left: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2rem;
    height: 1.875rem;
    padding: 0 0.625rem;
    border-radius: 999px;
    background-color: var(--color-ink);
    color: var(--color-invert);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
}

.step-text {
    font-size: 0.938rem;
}

/* --------------------------------------------------------------------------
   WhatsApp
   -------------------------------------------------------------------------- */

.section-whatsapp {
    background-color: var(--color-surface-alt);
}

.split {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
    gap: 4rem;
}

.split-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
}

.wa-flow {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.5rem;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    background-color: var(--color-surface);
    box-shadow: 0 30px 60px -40px var(--color-shadow-lg);
}

.wa-head {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.wa-head h3 {
    font-size: 0.938rem;
}

.wa-head p {
    font-size: 0.75rem;
    color: var(--color-brand);
}

.wa-thread {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    padding: 0.5rem 0;
}

.wa-msg {
    max-width: 82%;
    padding: 0.625rem 0.813rem;
    border-radius: 14px;
    background-color: var(--color-surface-alt);
    font-size: 0.875rem;
}

.wa-msg-out {
    align-self: flex-end;
    background-color: var(--color-brand-soft);
}

.wa-link {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-top: 0.5rem;
    padding: 0.625rem;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background-color: var(--color-surface);
}

.wa-link-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 9px;
    background-color: var(--color-ink);
    color: var(--color-invert);
    font-size: 0.75rem;
    font-weight: 700;
}

.wa-link-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.wa-link-text h4 {
    font-size: 0.813rem;
}

.wa-link-text p {
    font-size: 0.75rem;
    color: var(--color-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.wa-share {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem;
    border-radius: 10px;
    background-color: var(--color-whatsapp);
    color: var(--color-invert);
    font-size: 0.875rem;
    font-weight: 600;
}

.wa-share svg {
    width: 17px;
    height: 17px;
}

/* --------------------------------------------------------------------------
   Para quién es
   -------------------------------------------------------------------------- */

.audience-card {
    gap: 0.875rem;
    background-color: var(--color-surface);
}

.audience-card h3 {
    font-size: 1rem;
}

/* --------------------------------------------------------------------------
   Características
   -------------------------------------------------------------------------- */

.feature-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem 2rem;
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
    padding: 1rem 0;
    border-top: 1px solid var(--color-border);
}

.feature-icon {
    flex-shrink: 0;
    color: var(--color-brand);
}

.feature-icon svg {
    width: 20px;
    height: 20px;
}

.feature-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.feature-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.feature-head h3 {
    font-size: 0.938rem;
}

.feature-text p {
    font-size: 0.875rem;
}

.feature-soon .feature-icon {
    color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   Precios
   -------------------------------------------------------------------------- */

.plans {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
    gap: 1.5rem;
}

.plan {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 2rem;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    background-color: var(--color-surface);
}

.plan-featured {
    border-color: var(--color-ink);
    box-shadow: 0 2px 6px var(--color-shadow-sm), 0 30px 60px -40px var(--color-shadow-lg);
}

.plan-head {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.plan-name {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.plan-name h3 {
    font-size: 1.125rem;
}

.plan-tagline {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.plan-price {
    display: flex;
    align-items: baseline;
    gap: 0.375rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.plan-amount {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    color: var(--color-ink);
}

.plan-period {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.plan-features {
    flex: 1;
}

.plan-note {
    font-size: 0.75rem;
    color: var(--color-muted);
    text-align: center;
}

.pricing-note {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-muted);
    text-align: center;
}

/* --------------------------------------------------------------------------
   Testimonios
   -------------------------------------------------------------------------- */

.quote-card {
    gap: 1.25rem;
    justify-content: space-between;
}

.quote-text {
    font-size: 1rem;
    color: var(--color-ink);
}

.quote-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-brand-soft);
    color: var(--color-brand-strong);
    font-size: 0.875rem;
    font-weight: 700;
    flex-shrink: 0;
}

.quote-author h4 {
    font-size: 0.875rem;
}

.quote-author p {
    font-size: 0.813rem;
    color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */

.faq {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: 14px;
    background-color: var(--color-surface);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item[open] {
    border-color: var(--color-border-strong);
    box-shadow: 0 1px 2px var(--color-shadow-sm);
}

.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.125rem 1.25rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-ink);
}

.faq-item summary::after {
    content: "";
    flex-shrink: 0;
    width: 12px;
    height: 12px;
    border-right: 2px solid var(--color-muted);
    border-bottom: 2px solid var(--color-muted);
    transform: rotate(45deg) translate(-2px, -2px);
    transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
    transform: rotate(225deg) translate(-2px, -2px);
}

.faq-answer {
    padding: 0 1.25rem 1.25rem;
    font-size: 0.938rem;
}

/* --------------------------------------------------------------------------
   CTA final
   -------------------------------------------------------------------------- */

.section-cta {
    background-color: var(--color-ink);
}

.cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.cta h2 {
    max-width: 18ch;
    color: var(--color-invert);
}

.cta-text {
    max-width: 52ch;
    font-size: 1.125rem;
    color: var(--color-invert-soft);
}

.cta-note {
    font-size: 0.875rem;
    color: var(--color-invert-soft);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
    padding: 4rem 0 2rem;
    background-color: var(--color-surface-alt);
    border-top: 1px solid var(--color-border);
}

.footer-top {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) repeat(4, minmax(0, 1fr));
    gap: 2.5rem;
    padding-bottom: 3rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 34ch;
}

.footer-brand p {
    font-size: 0.875rem;
}

.footer-social {
    display: flex;
    gap: 0.5rem;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background-color: var(--color-surface);
    color: var(--color-body);
    transition: color 0.15s ease, border-color 0.15s ease;
}

.footer-social a:hover {
    color: var(--color-ink);
    border-color: var(--color-border-strong);
}

.footer-social svg {
    width: 17px;
    height: 17px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.footer-col h3 {
    font-size: 0.813rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-muted);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    font-size: 0.875rem;
}

.footer-col a:hover {
    color: var(--color-ink);
}

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.813rem;
    color: var(--color-muted);
}

.footer-legal {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
}

.footer-legal a:hover {
    color: var(--color-ink);
}

/* --------------------------------------------------------------------------
   Scroll reveal
   -------------------------------------------------------------------------- */

.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* --------------------------------------------------------------------------
   Back to top
   -------------------------------------------------------------------------- */

.back-to-top {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 40;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background-color: var(--color-brand);
    color: var(--color-invert);
    box-shadow: 0 8px 24px var(--color-shadow-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(0.5rem);
    transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.15s ease, visibility 0s linear 0.2s;
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.15s ease, visibility 0s;
}

.back-to-top:hover {
    background-color: var(--color-brand-strong);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* --------------------------------------------------------------------------
   Responsive — notebook
   -------------------------------------------------------------------------- */

@media (max-width: 1199px) {
    .hero {
        gap: 3rem;
    }

    .hero-chip-a,
    .hero-chip-b {
        left: -1rem;
    }

    .mockup-phone {
        right: -0.5rem;
        width: 148px;
    }
}

/* --------------------------------------------------------------------------
   Responsive — tablet
   -------------------------------------------------------------------------- */

@media (max-width: 991px) {
    .nav {
        position: fixed;
        top: 4.5rem;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 1.5rem;
        max-height: calc(100vh - 4.5rem);
        padding: 1.5rem;
        border-bottom: 1px solid var(--color-border);
        background-color: var(--color-surface);
        box-shadow: 0 20px 40px -30px var(--color-shadow-lg);
        overflow-y: auto;
        transform: translateY(-8px);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    }

    .nav.is-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
        font-size: 1rem;
    }

    .nav ul a {
        display: block;
        padding: 0.625rem 0.5rem;
        border-radius: 10px;
    }

    .nav ul a:hover {
        background-color: var(--color-surface-alt);
    }

    .nav-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .nav-actions .btn,
    .nav-actions .btn > a {
        width: 100%;
    }

    .nav-toggle {
        display: block;
    }

    .hero {
        grid-template-columns: 1fr;
        gap: 3.5rem;
    }

    .hero-copy {
        align-items: center;
        text-align: center;
    }

    .hero-title,
    .hero-subtitle {
        max-width: none;
    }

    .hero-visual {
        max-width: 560px;
        width: 100%;
        margin: 0 auto;
    }

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

    .steps,
    .plans,
    .feature-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .split {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .split-copy {
        align-items: flex-start;
    }

    .mockup-app {
        grid-template-columns: 1fr;
        min-height: 0;
    }

    .app-side {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        border-right: 0;
        border-bottom: 1px solid var(--color-border);
        padding: 0.875rem 1rem;
        overflow-x: auto;
    }

    .app-menu,
    .app-menu ul {
        flex-direction: row;
        gap: 0.25rem;
    }

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

    .app-form {
        grid-template-columns: 1fr;
    }

    .footer-top {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 2rem;
    }

    .footer-brand {
        grid-column: 1 / -1;
        max-width: none;
    }
}

/* --------------------------------------------------------------------------
   Responsive — mobile
   -------------------------------------------------------------------------- */

@media (max-width: 767px) {
    .site-header {
        background-color: var(--color-surface);
    }

    .navbar {
        height: 4rem;
    }

    .nav {
        top: 4rem;
        max-height: calc(100vh - 4rem);
    }

    .section-hero {
        padding: 2.5rem 0 4rem;
    }

    .hero {
        gap: 2.5rem;
    }

    .hero-copy {
        gap: 1.25rem;
    }

    .hero-subtitle {
        font-size: 1.063rem;
    }

    .hero-visual {
        padding-bottom: 3.5rem;
    }

    .btn-group {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .btn-group .btn,
    .btn-group .btn > a {
        width: 100%;
    }

    .mockup-body {
        padding: 0.875rem;
        gap: 0.75rem;
    }

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

    .mockup-phone {
        right: 0;
        width: 118px;
        border-radius: 20px;
    }

    .hero-chip {
        font-size: 0.688rem;
        padding: 0.375rem 0.563rem;
    }

    .hero-chip-a {
        top: -0.75rem;
        left: -0.25rem;
    }

    .hero-chip-b {
        display: none;
    }

    .hero-chip-c {
        top: auto;
        bottom: 0.5rem;
        right: auto;
        left: 0;
    }

    .stat {
        padding: 1rem 0.75rem;
    }

    .stat-value {
        font-size: 1.375rem;
    }

    .demo {
        gap: 1.75rem;
    }

    .demo-tabs {
        align-self: stretch;
        overflow-x: auto;
        flex-wrap: nowrap;
    }

    .demo-tabs button {
        white-space: nowrap;
    }

    .app-main {
        padding: 1rem;
    }

    .app-row {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    .app-row span:nth-child(2),
    .app-row span:nth-child(3) {
        display: none;
    }

    .steps,
    .plans,
    .feature-list {
        grid-template-columns: 1fr;
    }

    .steps {
        gap: 2.5rem;
    }

    .plan {
        padding: 1.5rem;
    }

    .wa-flow {
        padding: 1rem;
    }

    .faq-item summary {
        padding: 1rem;
        font-size: 0.938rem;
    }

    .faq-answer {
        padding: 0 1rem 1rem;
    }

    .site-footer {
        padding: 3rem 0 1.5rem;
    }

    .footer-top {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding-bottom: 2rem;
    }

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

@media (max-width: 359px) {
    .product-grid {
        grid-template-columns: 1fr;
    }

    .mockup-phone {
        display: none;
    }
}