:root {
    --color-primary: #6d4aff;
    --color-primary-dark: #4f35cc;
    --color-secondary: #f04aa4;
    --color-accent: #ff8a3d;
    --color-teal: #12b8b3;
    --color-text: #15151f;
    --color-text-muted: #66667a;
    --color-background: #ffffff;
    --color-background-soft: #f7f5ff;
    --color-background-warm: #fff8f1;
    --color-background-dark: #12101f;
    --color-border: rgba(21, 21, 31, 0.1);
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 32px;
    --radius-pill: 999px;
    --shadow-sm: 0 10px 30px rgba(50, 35, 120, 0.08);
    --shadow-md: 0 20px 60px rgba(50, 35, 120, 0.14);
    --shadow-lg: 0 30px 100px rgba(50, 35, 120, 0.2);
    --container-width: 1180px;
    --transition-fast: 180ms ease;
    --transition-default: 320ms ease;
    --transition-slow: 600ms cubic-bezier(0.22, 1, 0.36, 1);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--color-text);
    background: var(--color-background);
    font-family: Inter, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

body.nav-open {
    overflow: hidden;
}

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

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

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    font: inherit;
}

:focus-visible {
    outline: 3px solid rgba(109, 74, 255, 0.45);
    outline-offset: 3px;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 2000;
    padding: 10px 14px;
    border-radius: var(--radius-pill);
    background: var(--color-text);
    color: #fff;
    transform: translateY(-160%);
}

.skip-link:focus {
    transform: translateY(0);
}

.container {
    width: min(100% - 40px, var(--container-width));
    margin: 0 auto;
}

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    padding: 18px 0;
    transition: background var(--transition-default), box-shadow var(--transition-default), padding var(--transition-default);
}

.site-header.is-scrolled,
.site-header.is-open {
    padding: 12px 0;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow-sm);
}

.site-header__content {
    display: flex;
    align-items: center;
    gap: 22px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text);
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0;
}

.brand__mark {
    display: grid;
    width: 40px;
    height: 40px;
    place-items: center;
    border-radius: 11px;
    color: #fff;
    font-size: 15px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    box-shadow: 0 10px 24px rgba(109, 74, 255, 0.25);
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 26px;
    margin-left: auto;
    color: var(--color-text-muted);
    font-size: 15px;
    font-weight: 700;
}

.site-nav a {
    transition: color var(--transition-fast);
}

.site-nav a:hover {
    color: var(--color-primary);
}

.site-header__cta {
    flex: 0 0 auto;
}

.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    background: #fff;
    color: var(--color-text);
}

.button {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    padding: 12px 22px;
    font-weight: 800;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.button:hover {
    transform: translateY(-2px);
}

.button--primary {
    color: #fff;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    box-shadow: 0 16px 36px rgba(109, 74, 255, 0.28);
}

.button--ghost {
    color: var(--color-primary-dark);
    background: rgba(255, 255, 255, 0.72);
    border-color: rgba(109, 74, 255, 0.18);
}

.button--secondary {
    color: var(--color-primary-dark);
    border-color: rgba(109, 74, 255, 0.22);
    background: #fff;
}

.hero {
    position: relative;
    min-height: calc(100vh - 72px);
    padding: 118px 0 42px;
    display: grid;
    align-items: center;
    overflow: hidden;
    background:
        radial-gradient(circle at 80% 18%, rgba(240, 74, 164, 0.18), transparent 30%),
        radial-gradient(circle at 15% 25%, rgba(18, 184, 179, 0.16), transparent 28%),
        linear-gradient(140deg, #fff 0%, #f7f5ff 54%, #fff8f1 100%);
}

.hero::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 140px;
    background: linear-gradient(180deg, transparent, var(--color-background));
    pointer-events: none;
}

.hero__grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.82fr);
    gap: 72px;
    align-items: center;
}

.eyebrow {
    margin: 0 0 14px;
    color: var(--color-primary-dark);
    font-size: 13px;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.download h2 {
    margin: 0;
    color: var(--color-text);
    line-height: 1.04;
    letter-spacing: 0;
}

.hero h1 {
    max-width: 760px;
    font-size: clamp(44px, 7vw, 82px);
}

.hero__lead {
    max-width: 620px;
    margin: 24px 0 0;
    color: var(--color-text-muted);
    font-size: 21px;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin: 34px 0 0;
}

.hero__proof {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 30px 0 0;
    padding: 0;
    list-style: none;
}

.hero__proof li {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 13px;
    border: 1px solid rgba(109, 74, 255, 0.14);
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.72);
    color: var(--color-text-muted);
    font-size: 14px;
    font-weight: 700;
}

.hero__proof i {
    color: var(--color-primary);
}

.hero__visual {
    position: relative;
    min-height: 640px;
    display: grid;
    place-items: center;
}

.phone-shell {
    position: relative;
    width: min(320px, 78vw);
    aspect-ratio: 390 / 844;
    border: 10px solid #15151f;
    border-radius: 42px;
    background: #15151f;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.phone-shell::before {
    content: "";
    position: absolute;
    top: 10px;
    left: 50%;
    z-index: 4;
    width: 92px;
    height: 24px;
    border-radius: var(--radius-pill);
    background: #15151f;
    transform: translateX(-50%);
}

.phone-screen {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transform: scale(1.018);
    transition: opacity var(--transition-default), transform var(--transition-slow);
}

.phone-screen.is-active {
    opacity: 1;
    transform: scale(1);
}

.hero-phone {
    transform: rotate(-4deg);
}

.hero-chip {
    position: absolute;
    z-index: 3;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-pill);
    padding: 11px 15px;
    background: rgba(255, 255, 255, 0.84);
    box-shadow: var(--shadow-sm);
    color: var(--color-text);
    font-size: 14px;
    font-weight: 900;
    backdrop-filter: blur(14px);
}

.hero-chip--xp {
    top: 88px;
    left: 4%;
}

.hero-chip--streak {
    right: 0;
    top: 170px;
}

.hero-chip--score {
    left: 0;
    bottom: 170px;
}

.hero-chip--review {
    right: 4%;
    bottom: 96px;
}

.metrics {
    padding: 34px 0 76px;
    background: var(--color-background);
}

.metrics__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.metric {
    padding: 22px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.metric strong {
    display: block;
    color: var(--color-primary-dark);
    font-size: 34px;
    line-height: 1;
}

.metric span {
    display: block;
    margin-top: 8px;
    color: var(--color-text-muted);
    font-weight: 700;
}

.section-heading {
    max-width: 780px;
    margin: 0 auto 54px;
    text-align: center;
}

.section-heading--left {
    margin-left: 0;
    text-align: left;
}

.section-heading h2,
.download h2 {
    font-size: clamp(34px, 5vw, 58px);
}

.section-heading p:not(.eyebrow),
.download p {
    margin: 18px 0 0;
    color: var(--color-text-muted);
    font-size: 18px;
}

.feature-showcase {
    padding: 90px 0 70px;
    background: linear-gradient(180deg, #fff 0%, var(--color-background-soft) 100%);
}

.feature-showcase__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 440px);
    gap: 72px;
    align-items: start;
}

.feature-showcase__visual {
    position: sticky;
    top: 90px;
    display: grid;
    height: calc(100vh - 140px);
    min-height: 560px;
    place-items: center;
}

.feature-step {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    opacity: 0.38;
    transform: translateY(24px);
    transition: opacity var(--transition-default), transform var(--transition-default);
}

.feature-step.is-active {
    opacity: 1;
    transform: translateY(0);
}

.feature-step span {
    color: var(--color-secondary);
    font-weight: 900;
}

.feature-step h3 {
    max-width: 540px;
    margin: 12px 0 12px;
    color: var(--color-text);
    font-size: clamp(32px, 4vw, 52px);
    line-height: 1.05;
}

.feature-step p {
    max-width: 500px;
    margin: 0;
    color: var(--color-text-muted);
    font-size: 19px;
}

.feature-step img {
    display: none;
}

.daily-routine,
.review-method,
.comparison {
    padding: 96px 0;
    background: #fff;
}

.daily-routine__grid,
.review-method__grid,
.personalized-content__grid {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 54px;
    align-items: center;
}

.daily-routine__grid > *,
.review-method__grid > *,
.personalized-content__grid > *,
.pricing__grid > * {
    min-width: 0;
}

.routine-steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: routine;
}

.routine-steps li {
    position: relative;
    min-height: 190px;
    padding: 22px;
    border-radius: var(--radius-md);
    background: var(--color-background-soft);
    overflow: hidden;
}

.routine-steps li::before {
    counter-increment: routine;
    content: "0" counter(routine);
    position: absolute;
    right: 14px;
    bottom: -8px;
    color: rgba(109, 74, 255, 0.1);
    font-size: 62px;
    font-weight: 900;
}

.routine-steps strong {
    display: block;
    color: var(--color-primary-dark);
    font-size: 28px;
}

.routine-steps span {
    display: block;
    margin-top: 12px;
    font-weight: 800;
}

.interactive-demos {
    padding: 96px 0;
    background:
        radial-gradient(circle at 10% 10%, rgba(18, 184, 179, 0.13), transparent 30%),
        var(--color-background-dark);
    color: #fff;
}

.interactive-demos .section-heading h2,
.interactive-demos .eyebrow {
    color: #fff;
}

.demos-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.demo-card {
    min-height: 300px;
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.08);
}

.demo-card h3 {
    margin: 0 0 18px;
    font-size: 20px;
}

.demo-card--flashcard {
    grid-column: span 2;
}

.flashcard-demo {
    width: 100%;
    height: 170px;
    border: 0;
    padding: 0;
    color: var(--color-text);
    background: transparent;
    perspective: 900px;
    cursor: pointer;
}

.flashcard-demo__inner {
    position: relative;
    display: block;
    width: 100%;
    height: 100%;
    transition: transform var(--transition-slow);
    transform-style: preserve-3d;
}

.flashcard-demo.is-flipped .flashcard-demo__inner {
    transform: rotateY(180deg);
}

.flashcard-demo__front,
.flashcard-demo__back {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 24px;
    border-radius: var(--radius-md);
    background: #fff;
    color: var(--color-text);
    font-size: 24px;
    font-weight: 900;
    backface-visibility: hidden;
}

.flashcard-demo__back {
    background: #fff8f1;
    transform: rotateY(180deg);
}

.review-buttons {
    display: flex;
    gap: 10px;
    margin-top: 14px;
}

.review-buttons button,
.word-order button,
.billing-tabs button,
.goal-tabs button {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    padding: 10px 14px;
    cursor: pointer;
    font-weight: 800;
}

.review-buttons button {
    flex: 1;
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.18);
}

.chat-demo {
    display: grid;
    gap: 12px;
}

.chat-demo p {
    margin: 0;
    padding: 14px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.09);
}

mark {
    border-radius: 6px;
    padding: 1px 5px;
    background: rgba(255, 138, 61, 0.35);
    color: #fff;
}

.voice-demo {
    display: grid;
    justify-items: start;
    gap: 14px;
}

.voice-demo button {
    display: grid;
    width: 56px;
    height: 56px;
    place-items: center;
    border: 0;
    border-radius: 50%;
    color: #fff;
    background: var(--color-secondary);
}

.wave {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 48px;
}

.wave span {
    width: 8px;
    height: 18px;
    border-radius: var(--radius-pill);
    background: var(--color-teal);
    animation: wave 900ms ease-in-out infinite;
}

.wave span:nth-child(2) { animation-delay: 100ms; }
.wave span:nth-child(3) { animation-delay: 200ms; }
.wave span:nth-child(4) { animation-delay: 300ms; }
.wave span:nth-child(5) { animation-delay: 400ms; }

@keyframes wave {
    50% {
        height: 42px;
    }
}

.word-order {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.word-order button {
    background: #fff;
    color: var(--color-text);
}

.word-order.is-sorted button {
    background: var(--color-teal);
    color: #fff;
}

.review-method {
    background: var(--color-background-warm);
}

.review-timeline {
    position: relative;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.review-timeline::before {
    content: "";
    position: absolute;
    top: 34px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.review-timeline li {
    position: relative;
    z-index: 1;
    display: grid;
    justify-items: center;
    gap: 8px;
    text-align: center;
}

.review-timeline li::before {
    content: "";
    width: 28px;
    height: 28px;
    border: 6px solid #fff;
    border-radius: 50%;
    background: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.review-timeline strong {
    color: var(--color-text);
}

.review-timeline span {
    color: var(--color-text-muted);
    font-weight: 700;
}

.personalized-content,
.progress-section,
.pricing {
    padding: 96px 0;
    background: var(--color-background-soft);
}

.goal-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 28px;
}

.goal-tabs button,
.billing-tabs button {
    color: var(--color-text-muted);
    background: #fff;
}

.goal-tabs button[aria-selected="true"],
.billing-tabs button[aria-selected="true"] {
    color: #fff;
    border-color: transparent;
    background: var(--color-primary);
}

.goal-preview {
    min-width: 0;
    min-height: 360px;
    padding: 34px;
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-md);
}

.goal-preview > span {
    color: var(--color-secondary);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.goal-preview h3 {
    margin: 14px 0 16px;
    font-size: 36px;
    line-height: 1.1;
}

.goal-preview p {
    color: var(--color-text-muted);
    font-size: 22px;
}

.goal-preview ul,
.price-card ul,
.comparison ul {
    margin: 22px 0 0;
    padding: 0;
    list-style: none;
}

.goal-preview li,
.price-card li,
.comparison li {
    position: relative;
    margin-top: 10px;
    padding-left: 24px;
}

.goal-preview li::before,
.price-card li::before,
.comparison li::before {
    content: "";
    position: absolute;
    top: 0.72em;
    left: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-teal);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1.4fr repeat(3, 1fr);
    gap: 18px;
}

.dashboard-card {
    min-height: 180px;
    padding: 24px;
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.dashboard-card--large {
    min-height: 250px;
}

.dashboard-card span {
    display: block;
    color: var(--color-text-muted);
    font-weight: 800;
}

.dashboard-card strong {
    display: block;
    margin-top: 12px;
    font-size: 44px;
    line-height: 1;
}

.mini-bars {
    display: flex;
    align-items: end;
    gap: 10px;
    height: 96px;
    margin-top: 38px;
}

.mini-bars i {
    flex: 1;
    min-width: 12px;
    border-radius: 10px 10px 0 0;
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
}

.mini-bars i:nth-child(1) { height: 35%; }
.mini-bars i:nth-child(2) { height: 48%; }
.mini-bars i:nth-child(3) { height: 42%; }
.mini-bars i:nth-child(4) { height: 70%; }
.mini-bars i:nth-child(5) { height: 58%; }
.mini-bars i:nth-child(6) { height: 82%; }
.mini-bars i:nth-child(7) { height: 100%; }

.comparison__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.comparison article {
    padding: 30px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #fff;
}

.comparison__highlight {
    box-shadow: var(--shadow-md);
}

.testimonials {
    padding: 96px 0;
    background: #fff;
}

.featured-content {
    padding: 96px 0;
    background: var(--color-background-soft);
}

.content-card-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.content-card {
    min-width: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.content-card__image-link {
    display: block;
    background: var(--color-background-soft);
}

.content-card img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.content-card__body {
    padding: 22px;
}

.content-card__category {
    color: var(--color-secondary);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.content-card h3 {
    margin: 10px 0;
    font-size: 21px;
    line-height: 1.2;
}

.content-card h3 a:hover {
    color: var(--color-primary);
}

.content-card p,
.content-card__meta {
    color: var(--color-text-muted);
}

.content-card__meta {
    display: block;
    margin-top: 16px;
    font-size: 14px;
    font-weight: 800;
}

.section-actions {
    display: flex;
    justify-content: center;
    margin-top: 34px;
}

.testimonials-track {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(280px, 380px);
    gap: 18px;
    max-width: 100%;
    overflow-x: auto;
    padding-bottom: 18px;
    scroll-snap-type: x mandatory;
}

.testimonial-card {
    scroll-snap-align: start;
    padding: 24px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-background-soft);
}

.rating {
    color: var(--color-accent);
    letter-spacing: 0;
}

.testimonial-card p {
    color: var(--color-text-muted);
}

.testimonial-card strong,
.testimonial-card span {
    display: block;
}

.testimonial-card span {
    color: var(--color-text-muted);
    font-size: 14px;
}

.pricing__grid {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 22px;
}

.price-card {
    min-width: 0;
    padding: 32px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.price-card--featured {
    border-color: rgba(109, 74, 255, 0.35);
    box-shadow: var(--shadow-md);
}

.price-card__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.price-card h3 {
    margin: 0;
    font-size: 30px;
}

.price-card__top span,
.saving {
    color: var(--color-secondary);
    font-weight: 900;
}

.price {
    margin: 24px 0 0;
    color: var(--color-text);
    font-size: 48px;
    font-weight: 900;
    line-height: 1;
}

.billing-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    max-width: 100%;
    min-width: 0;
    margin-top: 22px;
}

.saving {
    display: block;
    min-height: 24px;
    margin-top: 10px;
}

.download {
    padding: 104px 0;
    color: #fff;
    background:
        radial-gradient(circle at 80% 20%, rgba(255, 138, 61, 0.35), transparent 30%),
        linear-gradient(135deg, var(--color-primary-dark), var(--color-background-dark));
}

.download__content {
    max-width: 820px;
    text-align: center;
}

.download h2,
.download p {
    color: #fff;
}

.store-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-top: 30px;
}

.store-button {
    display: inline-flex;
    min-width: 210px;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.12);
    text-align: left;
    font-weight: 900;
}

.store-button i {
    font-size: 28px;
}

.store-button small {
    display: block;
    font-size: 12px;
    font-weight: 700;
    opacity: 0.82;
}

.site-footer {
    padding: 56px 0 28px;
    color: rgba(255, 255, 255, 0.74);
    background: #0d0b16;
}

.site-footer__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(150px, 0.55fr));
    gap: 34px;
}

.brand--footer {
    color: #fff;
}

.site-footer h2 {
    margin: 0 0 12px;
    color: #fff;
    font-size: 16px;
}

.site-footer nav a {
    display: block;
    margin-top: 8px;
}

.copyright {
    margin-top: 38px;
    padding-top: 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

@media (max-width: 1040px) {
    .site-nav {
        gap: 16px;
        font-size: 14px;
    }

    .hero__grid,
    .feature-showcase__grid,
    .daily-routine__grid,
    .review-method__grid,
    .personalized-content__grid,
    .pricing__grid {
        grid-template-columns: 1fr;
    }

    .hero__visual {
        min-height: 560px;
    }

    .feature-showcase__visual {
        display: none;
    }

    .feature-step {
        min-height: auto;
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
        gap: 28px;
        align-items: center;
        padding: 42px 0;
        opacity: 1;
        transform: none;
    }

    .feature-step img {
        display: block;
        width: min(280px, 100%);
        border: 8px solid #15151f;
        border-radius: 32px;
        box-shadow: var(--shadow-md);
    }

    .demos-grid,
    .dashboard-grid,
    .content-card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .demo-card--flashcard {
        grid-column: span 2;
    }
}

@media (max-width: 820px) {
    .container {
        width: min(100% - 28px, var(--container-width));
    }

    .site-header__content {
        gap: 12px;
    }

    .site-nav {
        position: fixed;
        inset: 70px 14px auto;
        display: grid;
        justify-content: stretch;
        gap: 0;
        padding: 14px;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        background: #fff;
        box-shadow: var(--shadow-md);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-10px);
        transition: opacity var(--transition-fast), transform var(--transition-fast);
    }

    .site-nav.is-open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .site-nav a {
        padding: 13px 10px;
    }

    .site-header__cta {
        margin-left: auto;
        padding-inline: 16px;
    }

    .menu-toggle {
        display: inline-grid;
        place-items: center;
    }

    .hero {
        min-height: auto;
        padding-top: 104px;
    }

    .hero__grid {
        gap: 42px;
    }

    .hero__lead {
        font-size: 18px;
    }

    .hero__visual {
        min-height: 520px;
    }

    .hero-chip--xp { left: 0; top: 40px; }
    .hero-chip--streak { right: 0; top: 118px; }
    .hero-chip--score { left: 0; bottom: 116px; }
    .hero-chip--review { right: 0; bottom: 44px; }

    .metrics__grid,
    .routine-steps,
    .comparison__grid,
    .site-footer__grid {
        grid-template-columns: 1fr 1fr;
    }

    .feature-step {
        grid-template-columns: 1fr;
    }

    .feature-step img {
        justify-self: center;
        margin-inline: auto;
    }

    .review-timeline {
        grid-template-columns: 1fr;
    }

    .review-timeline::before {
        top: 14px;
        bottom: 14px;
        left: 14px;
        right: auto;
        width: 3px;
        height: auto;
    }

    .review-timeline li {
        min-height: 70px;
        grid-template-columns: 28px 1fr;
        justify-items: start;
        column-gap: 16px;
        text-align: left;
    }

    .review-timeline li::before {
        grid-row: span 2;
    }
}

@media (max-width: 620px) {
    .brand {
        font-size: 0;
    }

    .site-header__cta {
        min-height: 42px;
        font-size: 14px;
    }

    .hero h1 {
        font-size: 42px;
    }

    .hero__actions .button,
    .store-button {
        width: 100%;
    }

    .hero__visual {
        min-height: 480px;
    }

    .phone-shell {
        width: min(270px, 72vw);
        border-width: 8px;
        border-radius: 34px;
    }

    .hero-chip {
        padding: 9px 11px;
        font-size: 12px;
    }

    .metrics__grid,
    .routine-steps,
    .demos-grid,
    .dashboard-grid,
    .comparison__grid,
    .content-card-grid,
    .site-footer__grid {
        grid-template-columns: 1fr;
    }

    .demo-card--flashcard {
        grid-column: span 1;
    }

    .price-card {
        padding: 24px;
        border-radius: var(--radius-md);
    }

    .price-card__top {
        align-items: flex-start;
        flex-direction: column;
    }

    .price-card h3 {
        font-size: 26px;
    }

    .price {
        font-size: 40px;
    }

    .billing-tabs {
        flex-wrap: wrap;
        overflow-x: visible;
    }

    .billing-tabs button {
        flex: 1 1 calc(50% - 8px);
        min-width: 0;
        padding: 9px 10px;
        font-size: 14px;
    }

    .testimonials-track {
        grid-auto-columns: minmax(0, calc(100vw - 28px));
    }

    .daily-routine,
    .interactive-demos,
    .review-method,
    .personalized-content,
    .progress-section,
    .comparison,
    .testimonials,
    .pricing,
    .download,
    .feature-showcase {
        padding: 72px 0;
    }

    .goal-tabs {
        flex-wrap: wrap;
        overflow-x: visible;
        max-width: 100%;
    }

    .goal-tabs button {
        flex: 1 1 calc(50% - 10px);
        min-width: 0;
        padding: 9px 10px;
        font-size: 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 1ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}