/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --dark: #0A0A0B;
    --accent-dark: #1A1A1E;
    --accent: #2563EB;
    --muted: #64748b;
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --emerald-600: #059669;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.08);
    --radius-sm: 4px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--dark);
    background: var(--bg-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ===== Utility ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}
.container--sm { max-width: 896px; }
.container--md { max-width: 1024px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ===== SVG Icons ===== */
.icon {
    width: 24px;
    height: 24px;
    display: inline-block;
    vertical-align: middle;
    flex-shrink: 0;
}
.icon--lg {
    width: 48px;
    height: 48px;
}

/* ===== NAV ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}
.nav__inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav__logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}
.nav__logo-icon {
    width: 40px;
    height: 40px;
    background: var(--dark);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}
.nav__logo-text {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.05em;
    color: var(--dark);
    text-transform: uppercase;
}
.nav__logo-text span { color: var(--accent); }

.nav__links {
    display: flex;
    align-items: center;
    gap: 40px;
}
.nav__link {
    text-decoration: none;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color 0.2s;
}
.nav__link:hover { color: var(--dark); }
.nav__cta {
    display: inline-block;
    background: var(--dark);
    color: #fff;
    padding: 10px 32px;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    text-transform: uppercase;
    transition: background 0.2s;
}
.nav__cta:hover { background: #333; }

/* Burger */
.nav__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav__burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}
.nav__burger.open span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }

/* Mobile menu */
.nav__mobile {
    display: none;
    flex-direction: column;
    gap: 16px;
    padding: 24px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-top: 1px solid rgba(0,0,0,0.05);
}
.nav__mobile.open { display: flex; }
.nav__mobile a {
    text-decoration: none;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 8px 0;
}
.nav__mobile a:hover { color: var(--dark); }
.nav__mobile .nav__cta { text-align: center; }

/* ===== HERO ===== */
.hero {
    position: relative;
    padding: 176px 0 128px;
    overflow: hidden;
    background: #fff;
}
.hero__bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 33%;
    height: 100%;
    background: var(--slate-50);
    transform: skewX(-12deg) translateX(50%);
}
.hero__grid {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.hero__content {
    position: relative;
    z-index: 10;
}
.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    background: var(--slate-100);
    border: 1px solid var(--slate-200);
    margin-bottom: 40px;
}
.hero__badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
}
.hero__badge-text {
    font-size: 11px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--slate-600);
}
.hero__title {
    font-size: clamp(56px, 8vw, 96px);
    font-weight: 900;
    line-height: 0.9;
    letter-spacing: -0.04em;
    color: var(--dark);
    margin-bottom: 40px;
}
.hero__title .gray { color: var(--slate-400); }
.hero__subtitle {
    font-size: 20px;
    color: var(--slate-500);
    line-height: 1.7;
    max-width: 512px;
    font-weight: 500;
    margin-bottom: 40px;
}
.hero__actions {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}
.hero__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 20px 40px;
    font-size: 18px;
    font-weight: 900;
    text-transform: uppercase;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: transform 0.2s, background 0.2s;
    border: none;
    cursor: pointer;
}
.hero__btn--primary {
    background: var(--dark);
    color: #fff;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}
.hero__btn--primary:hover { transform: translateY(-2px); }
.hero__btn--outline {
    background: transparent;
    color: var(--dark);
    border: 1px solid var(--slate-200);
}
.hero__btn--outline:hover { background: var(--slate-50); }

.hero__social {
    display: flex;
    align-items: center;
    gap: 24px;
    padding-top: 24px;
}
.hero__avatars {
    display: flex;
}
.hero__avatars > * {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 4px solid #fff;
    margin-left: -16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.hero__avatars > *:first-child { margin-left: 0; }
.hero__avatar-1 { background: linear-gradient(135deg, var(--slate-300), var(--slate-400)); }
.hero__avatar-2 { background: linear-gradient(135deg, var(--slate-400), var(--slate-500)); }
.hero__avatar-3 { background: linear-gradient(135deg, var(--slate-500), var(--slate-600)); }
.hero__social-text p:first-child { font-size: 14px; font-weight: 700; color: var(--dark); }
.hero__social-text p:last-child { font-size: 14px; font-weight: 500; color: var(--slate-400); }

/* Phone mockup */
.hero__phone-area {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}
.phone {
    position: relative;
    z-index: 20;
    width: 280px;
    aspect-ratio: 9 / 18.5;
    background: var(--dark);
    border-radius: 48px;
    padding: 12px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.2);
    outline: 4px solid var(--slate-100);
}
.phone__notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 112px;
    height: 20px;
    background: var(--dark);
    border-radius: 0 0 16px 16px;
    z-index: 40;
}
.phone__screen {
    width: 100%;
    height: 100%;
    background: #fff;
    border-radius: 38px;
    overflow: hidden;
    border: 1px solid var(--slate-200);
    padding: 20px;
    display: flex;
    flex-direction: column;
}
.phone__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.phone__header .icon { color: var(--slate-400); width: 20px; height: 20px; }
.phone__avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--slate-300), var(--slate-500));
}
.phone__exercise-label {
    font-size: 10px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--slate-400);
}
.phone__exercise-name {
    font-size: 20px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 20px;
}
.phone__image {
    flex: 1;
    background: var(--slate-100);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    border: 1px solid var(--slate-100);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.phone__image .icon { width: 48px; height: 48px; color: var(--slate-300); }
.phone__image-badge {
    position: absolute;
    bottom: 12px;
    left: 12px;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(4px);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(0,0,0,0.05);
    font-size: 9px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--dark);
}
.phone__stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
}
.phone__stat {
    background: var(--slate-50);
    padding: 12px;
    border-radius: var(--radius);
    border: 1px solid var(--slate-100);
    text-align: center;
}
.phone__stat-label {
    font-size: 8px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--slate-400);
}
.phone__stat-value {
    font-size: 16px;
    font-weight: 900;
    color: var(--dark);
}
.phone__button {
    background: var(--dark);
    height: 44px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* Glass cards */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.04);
    padding: 20px;
    border-radius: var(--radius-lg);
    position: absolute;
    z-index: 30;
}
.glass-card--progress {
    left: -48px;
    top: 40px;
    width: 208px;
    border-left: 4px solid var(--accent);
}
.glass-card--anthro {
    right: -40px;
    top: 25%;
    width: 224px;
    border-left: 4px solid var(--dark);
}
.glass-card--endurance {
    bottom: -24px;
    left: 25%;
    width: 192px;
    border-left: 4px solid var(--slate-400);
}
.glass-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}
.glass-card__label {
    font-size: 10px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--slate-400);
}
.glass-card__value {
    font-size: 24px;
    font-weight: 900;
    color: var(--dark);
}
.glass-card__icon { color: var(--accent); }
.glass-card__row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
}
.glass-card__row-label { font-size: 12px; font-weight: 700; color: var(--dark); }
.glass-card__row-value { font-size: 12px; font-weight: 900; color: var(--emerald-600); }
.glass-card__bars {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 48px;
}
.glass-card__bars > div { flex: 1; border-radius: 2px; }
.glass-card__bars .b1 { height: 40%; background: var(--slate-200); }
.glass-card__bars .b2 { height: 60%; background: var(--slate-300); }
.glass-card__bars .b3 { height: 55%; background: var(--slate-400); }
.glass-card__bars .b4 { height: 85%; background: var(--dark); }
.glass-card__bars .b5 { height: 100%; background: var(--accent); }

/* ===== FEATURES ===== */
.features {
    padding: 128px 0;
    background: var(--slate-50);
}
.features__header {
    max-width: 768px;
    margin-bottom: 96px;
}
.features__title {
    font-size: 48px;
    font-weight: 900;
    letter-spacing: -0.025em;
    color: var(--dark);
    text-transform: uppercase;
    margin-bottom: 24px;
}
.features__subtitle {
    font-size: 20px;
    font-weight: 500;
    color: var(--slate-500);
}
.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.feature-card {
    padding: 40px;
    border-radius: var(--radius-xl);
    transition: transform 0.5s, border-color 0.5s;
}
.feature-card:hover { transform: translateY(-8px); }
.feature-card--dark {
    background: var(--accent-dark);
    color: #fff;
}
.feature-card--light {
    background: #fff;
    border: 1px solid var(--slate-200);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.feature-card--light:hover { border-color: var(--dark); }
.feature-card__icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
}
.feature-card--dark .feature-card__icon {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.1);
}
.feature-card--dark:hover .feature-card__icon { background: var(--accent); }
.feature-card--light .feature-card__icon {
    background: var(--slate-100);
    color: var(--dark);
    border: 1px solid var(--slate-200);
}
.feature-card__icon .icon { width: 30px; height: 30px; }
.feature-card__title {
    font-size: 24px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.025em;
    margin-bottom: 16px;
}
.feature-card--light .feature-card__title { color: var(--dark); }
.feature-card__text {
    line-height: 1.7;
    font-weight: 500;
}
.feature-card--dark .feature-card__text { color: var(--slate-300); }
.feature-card--light .feature-card__text { color: var(--slate-500); }

/* ===== FAQ ===== */
.faq { padding: 128px 0; }
.faq__header {
    text-align: center;
    margin-bottom: 80px;
}
.faq__title {
    font-size: 48px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.025em;
    color: var(--dark);
    margin-bottom: 16px;
}
.faq__subtitle {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--slate-400);
}
.faq__list {
    max-width: 896px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.faq__item {
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--slate-200);
    overflow: hidden;
    transition: all 0.3s;
}
.faq__question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 32px;
    cursor: pointer;
    font-size: 20px;
    font-weight: 900;
    user-select: none;
    text-transform: uppercase;
    list-style: none;
}
.faq__question::-webkit-details-marker { display: none; }
.faq__question::marker { content: ''; }
.faq__question .faq__chevron {
    color: var(--slate-400);
    transition: transform 0.3s;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}
.faq__item[open] .faq__question { color: var(--accent); }
.faq__item[open] .faq__question .faq__chevron { transform: rotate(180deg); }
.faq__answer {
    padding: 0 32px 32px;
    color: var(--slate-500);
    font-weight: 500;
    line-height: 1.7;
}

/* ===== CTA ===== */
.cta { padding: 128px 24px; }
.cta__card {
    max-width: 1152px;
    margin: 0 auto;
    border-radius: 48px;
    background: var(--accent-dark);
    color: #fff;
    padding: 64px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0,0,0,0.15);
}
.cta__gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(37,99,235,0.2), transparent);
    opacity: 0.5;
}
.cta__inner {
    position: relative;
    z-index: 10;
}
.cta__title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 900;
    letter-spacing: -0.025em;
    line-height: 1;
    text-transform: uppercase;
    margin-bottom: 24px;
}
.cta__title .gray { color: var(--slate-400); }
.cta__text {
    font-size: 20px;
    color: var(--slate-300);
    max-width: 640px;
    margin: 0 auto 48px;
    font-weight: 500;
}
.cta__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}
.cta__btn {
    display: inline-block;
    padding: 20px 48px;
    border-radius: var(--radius-lg);
    font-size: 20px;
    font-weight: 900;
    text-transform: uppercase;
    text-decoration: none;
    transition: transform 0.2s, background 0.2s;
}
.cta__btn--white {
    background: #fff;
    color: var(--dark);
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}
.cta__btn--white:hover { transform: scale(1.05); }
.cta__btn--ghost {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
}
.cta__btn--ghost:hover { background: rgba(255,255,255,0.2); }

/* ===== FOOTER ===== */
.footer {
    padding: 80px 0;
    border-top: 1px solid var(--slate-200);
    background: #fff;
}
.footer__inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 48px;
}
.footer__logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}
.footer__logo-icon {
    width: 32px;
    height: 32px;
    background: var(--dark);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}
.footer__logo-icon .icon { width: 14px; height: 14px; }
.footer__logo-text {
    font-size: 20px;
    font-weight: 900;
    letter-spacing: -0.05em;
    color: var(--dark);
    text-transform: uppercase;
}
.footer__links {
    display: flex;
    gap: 40px;
}
.footer__link {
    font-size: 12px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--slate-400);
    text-decoration: none;
    transition: color 0.2s;
}
.footer__link:hover { color: var(--dark); }
.footer__copy {
    font-size: 12px;
    font-weight: 700;
    color: var(--slate-400);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* ===== MOBILE ===== */
@media (max-width: 1023px) {
    .hero__grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    .hero__phone-area { display: none; }
    .hero { padding: 140px 0 80px; }
}

@media (max-width: 767px) {
    .nav__links { display: none; }
    .nav__burger { display: flex; }

    .hero { padding: 120px 0 60px; }
    .hero__title { margin-bottom: 24px; }
    .hero__subtitle { font-size: 16px; margin-bottom: 24px; }
    .hero__actions { flex-direction: column; }
    .hero__btn { padding: 16px 24px; font-size: 16px; }
    .hero__social { padding-top: 16px; }

    .features { padding: 80px 0; }
    .features__header { margin-bottom: 48px; }
    .features__title { font-size: 32px; }
    .features__grid { grid-template-columns: 1fr; }
    .feature-card { padding: 32px; }

    .faq { padding: 80px 0; }
    .faq__title { font-size: 32px; }
    .faq__question { padding: 24px; font-size: 16px; }
    .faq__answer { padding: 0 24px 24px; }

    .cta { padding: 80px 24px; }
    .cta__card { padding: 48px 24px; border-radius: 32px; }
    .cta__title { font-size: 32px; }
    .cta__text { font-size: 16px; }
    .cta__btn { padding: 16px 32px; font-size: 16px; }
    .cta__actions { flex-direction: column; align-items: center; }

    .footer__inner { flex-direction: column; text-align: center; }
    .footer__links { flex-direction: column; gap: 16px; align-items: center; }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .features__grid { grid-template-columns: repeat(2, 1fr); }
    .features__grid > :last-child { grid-column: span 2; max-width: 50%; margin: 0 auto; }
}