/* ============================================================
   Athletic-bold light theme
   White base · electric-orange accent · heavy grotesk display
   ============================================================ */

:root {
    /* Surfaces */
    --c-bg:        #FFFFFF;   /* fondo principal, blanco limpio */
    --c-bg-alt:    #F4F5F7;   /* gris muy claro para alternar secciones */
    --c-surface:   #FFFFFF;   /* tarjetas */
    --c-ink:       #0B0D10;   /* casi negro — texto e ink sections */
    --c-bg-dark:   #0B0D10;   /* superficies oscuras (chat/coach) */
    --c-ink-2:     #3A3F45;
    --c-ink-dim:   #6B7075;
    --c-line:      #E4E6EA;
    --c-line-soft: #EEF0F3;

    /* Accent — naranja eléctrico */
    --c-accent:    #FF4D00;
    --c-accent-2:  #FF6A26;
    --c-accent-ink:#E23F00;
    --c-lime:      #C6FF3D;   /* pop secundario, energía */

    --c-on-dark:   #F5F6F8;
    --c-on-accent: #FFFFFF;
    --c-danger:    #D93025;
    --c-ok:        #12B76A;

    /* Type */
    --ff-sans:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --ff-display: 'Archivo', 'Arial Narrow', sans-serif;

    --fs-xs:   0.75rem;
    --fs-sm:   0.875rem;
    --fs-base: 1rem;
    --fs-md:   1.125rem;
    --fs-lg:   1.375rem;
    --fs-xl:   clamp(1.6rem, 1.1rem + 1.8vw, 2.4rem);
    --fs-2xl:  clamp(2.4rem, 1.4rem + 4vw, 4rem);
    --fs-3xl:  clamp(3rem, 1.6rem + 6vw, 6.5rem);

    --sp-1: .25rem; --sp-2: .5rem; --sp-3: .75rem; --sp-4: 1rem;
    --sp-5: 1.5rem; --sp-6: 2rem; --sp-7: 3rem; --sp-8: 4rem;
    --sp-9: 6rem;  --sp-10: 8rem;

    --container: 1180px;
    --radius-sm: 8px;
    --radius:    14px;
    --radius-lg: 22px;
    --shadow:    0 10px 30px rgba(11,13,16,.08);
    --shadow-lg: 0 24px 60px rgba(11,13,16,.16);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    font-family: var(--ff-sans);
    font-size: var(--fs-base);
    line-height: 1.6;
    color: var(--c-ink);
    background: var(--c-bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
h1, h2, h3, h4 { line-height: 1.02; font-weight: 800; letter-spacing: -.01em; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--sp-5); }

/* Display headings */
.display {
    font-family: var(--ff-display);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -.02em;
    line-height: .92;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
    padding: .8rem 1.4rem;
    border: 2px solid transparent;
    border-radius: 999px;
    font-weight: 700;
    font-size: var(--fs-sm);
    letter-spacing: .01em;
    transition: transform .12s ease, background .18s ease, color .18s ease, border-color .18s ease;
    white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--c-accent); color: var(--c-on-accent); }
.btn--primary:hover { background: var(--c-accent-ink); }
.btn--dark { background: var(--c-ink); color: var(--c-on-dark); }
.btn--dark:hover { background: #000; }
.btn--ghost { background: transparent; color: var(--c-ink); border-color: var(--c-ink); }
.btn--ghost:hover { background: var(--c-ink); color: var(--c-on-dark); }
.btn--lime { background: var(--c-lime); color: var(--c-ink); }
.btn--lg { padding: 1rem 1.8rem; font-size: var(--fs-md); }
.btn--sm { padding: .55rem 1rem; font-size: var(--fs-xs); }
.btn--block { width: 100%; }

/* ============================================================
   Header
   ============================================================ */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255,255,255,.86);
    backdrop-filter: saturate(140%) blur(12px);
    border-bottom: 1px solid var(--c-line);
}
.site-header__inner { display: flex; align-items: center; gap: var(--sp-5); height: 68px; }
.brand { display: inline-flex; align-items: center; gap: .55rem; }
.brand__mark { width: 30px; height: 30px; }
.brand__name {
    font-family: var(--ff-display); font-weight: 900; text-transform: uppercase;
    font-size: 1.35rem; letter-spacing: -.02em;
}
.brand__name em { color: var(--c-accent); font-style: normal; }

.nav--desktop { display: flex; align-items: center; gap: var(--sp-5); margin-inline-start: var(--sp-4); }
.nav__link {
    position: relative; font-weight: 600; font-size: var(--fs-sm); color: var(--c-ink-2);
    padding: .35rem 0;
}
.nav__link:hover { color: var(--c-ink); }
.nav__link.is-active { color: var(--c-ink); }
.nav__link.is-active::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 3px;
    background: var(--c-accent); border-radius: 2px;
}

.header-actions { display: flex; align-items: center; gap: var(--sp-3); margin-inline-start: auto; }
.user-pill { display: inline-flex; align-items: center; gap: .5rem; background: var(--c-bg-alt);
    border: 1px solid var(--c-line); border-radius: 999px; padding: .3rem .3rem .3rem .8rem; }
.user-pill__name { font-size: var(--fs-xs); font-weight: 600; color: var(--c-ink-2); }
.user-pill__logout { font-size: var(--fs-xs); font-weight: 700; background: var(--c-ink); color: #fff;
    padding: .35rem .7rem; border-radius: 999px; }

.hamburger { display: none; flex-direction: column; gap: 4px; width: 42px; height: 42px;
    align-items: center; justify-content: center; background: transparent; border: 1px solid var(--c-line);
    border-radius: 10px; }
.hamburger span { width: 18px; height: 2px; background: var(--c-ink); border-radius: 2px; }

.nav--mobile { display: none; flex-direction: column; gap: .25rem; padding: var(--sp-4) var(--sp-5);
    border-top: 1px solid var(--c-line); background: var(--c-bg); }
.nav--mobile .nav__link { padding: .7rem 0; font-size: var(--fs-md); border-bottom: 1px solid var(--c-line-soft); }
.nav--mobile .nav__cta { margin-top: var(--sp-3); }

@media (max-width: 860px) {
    .nav--desktop { display: none; }
    .hamburger { display: flex; }
    .nav--mobile:not([hidden]) { display: flex; }
    .header-cta { display: none; }
}

/* ============================================================
   Hero
   ============================================================ */
.hero { position: relative; background: var(--c-ink); color: var(--c-on-dark); overflow: hidden; }
.hero__inner { padding-block: clamp(3.5rem, 8vw, 7rem); position: relative; z-index: 2; }
.hero__eyebrow { display: inline-flex; align-items: center; gap: .5rem; font-size: var(--fs-xs);
    font-weight: 800; letter-spacing: .18em; text-transform: uppercase; color: var(--c-lime); }
.hero__title { font-family: var(--ff-display); font-weight: 900; text-transform: uppercase;
    font-size: var(--fs-3xl); letter-spacing: -.02em; line-height: .9; margin-top: var(--sp-4); }
.hero__title em { color: var(--c-accent); font-style: normal; }
.hero__sub { max-width: 46ch; margin-top: var(--sp-5); font-size: var(--fs-md); color: #C7CBD1; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-top: var(--sp-6); }
.hero__glow { position: absolute; inset: 0; z-index: 1;
    background: radial-gradient(60% 80% at 85% 20%, rgba(255,77,0,.55), transparent 60%),
                radial-gradient(50% 60% at 10% 90%, rgba(198,255,61,.18), transparent 60%); }
.hero__stats { display: flex; flex-wrap: wrap; gap: var(--sp-7); margin-top: var(--sp-7);
    border-top: 1px solid rgba(255,255,255,.12); padding-top: var(--sp-5); }
.stat__num { font-family: var(--ff-display); font-weight: 900; font-size: 2.2rem; color: #fff; }
.stat__label { font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: .12em; color: #9aa0a6; }

/* ============================================================
   Sections
   ============================================================ */
.section { padding-block: clamp(3rem, 7vw, 6rem); }
.section--alt { background: var(--c-bg-alt); }
.section--ink { background: var(--c-ink); color: var(--c-on-dark); }
.section__head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--sp-5);
    margin-bottom: var(--sp-6); flex-wrap: wrap; }
.section__eyebrow { font-size: var(--fs-xs); font-weight: 800; letter-spacing: .16em; text-transform: uppercase;
    color: var(--c-accent); }
.section__title { font-family: var(--ff-display); font-weight: 900; text-transform: uppercase;
    font-size: var(--fs-2xl); letter-spacing: -.02em; margin-top: var(--sp-2); }
.section__lead { max-width: 54ch; color: var(--c-ink-dim); margin-top: var(--sp-3); }

/* Feature tiles */
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-5); }
.tile { background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-lg);
    padding: var(--sp-6); transition: transform .15s ease, box-shadow .2s ease; }
.tile:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.tile__icon { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
    background: var(--c-ink); color: var(--c-lime); margin-bottom: var(--sp-4); }
.tile__icon svg { width: 26px; height: 26px; }
.tile--accent .tile__icon { background: var(--c-accent); color: #fff; }
.tile__title { font-size: var(--fs-lg); font-weight: 800; }
.tile__text { color: var(--c-ink-dim); margin-top: var(--sp-2); font-size: var(--fs-sm); }
.tile__link { display: inline-flex; align-items: center; gap: .4rem; margin-top: var(--sp-4);
    font-weight: 700; color: var(--c-accent); font-size: var(--fs-sm); }

/* ============================================================
   Trainer + workout cards
   ============================================================ */
.trainer-strip { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: var(--sp-5); }
.trainer { text-align: center; }
.trainer__avatar { width: 100%; aspect-ratio: 1; border-radius: var(--radius-lg); object-fit: cover;
    background: var(--c-bg-alt); border: 1px solid var(--c-line); }
.trainer__name { font-weight: 800; margin-top: var(--sp-3); }
.trainer__spec { font-size: var(--fs-xs); color: var(--c-ink-dim); text-transform: uppercase; letter-spacing: .08em; }

.carousel { margin-bottom: var(--sp-7); }
.carousel__head { display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-4); }
.carousel__avatar { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; border: 1px solid var(--c-line); }
.carousel__name { font-weight: 800; }
.carousel__spec { font-size: var(--fs-xs); color: var(--c-ink-dim); }
.rail { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(230px, 1fr);
    gap: var(--sp-4); overflow-x: auto; padding-bottom: var(--sp-3); scroll-snap-type: x mandatory; }
.rail::-webkit-scrollbar { height: 8px; }
.rail::-webkit-scrollbar-thumb { background: var(--c-line); border-radius: 8px; }

.workout-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--sp-5); }
.wcard { scroll-snap-align: start; background: var(--c-surface); border: 1px solid var(--c-line);
    border-radius: var(--radius); overflow: hidden; transition: transform .15s ease, box-shadow .2s ease; }
.wcard:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.wcard__media { position: relative; aspect-ratio: 16/10; background: var(--c-bg-alt); overflow: hidden; }
.wcard__media img { width: 100%; height: 100%; object-fit: cover; }
.wcard__play { position: absolute; inset: 0; display: grid; place-items: center; }
.wcard__play span { width: 54px; height: 54px; border-radius: 50%; background: rgba(11,13,16,.55);
    display: grid; place-items: center; backdrop-filter: blur(4px); }
.wcard__play svg { width: 22px; height: 22px; fill: #fff; margin-left: 3px; }
.wcard__body { padding: var(--sp-4); }
.wcard__cat { font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: .1em; color: var(--c-accent);
    font-weight: 800; }
.wcard__title { font-weight: 700; margin-top: var(--sp-1); line-height: 1.25; }
.badge { display: inline-block; background: var(--c-lime); color: var(--c-ink); font-size: var(--fs-xs);
    font-weight: 800; padding: .2rem .55rem; border-radius: 999px; }

/* ============================================================
   Video detail / player
   ============================================================ */
.player-wrap { background: #000; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.player-wrap video { width: 100%; display: block; aspect-ratio: 16/9; background: #000; }
.detail-meta { margin-top: var(--sp-5); }
.detail-meta__cat { color: var(--c-accent); font-weight: 800; text-transform: uppercase; letter-spacing: .1em;
    font-size: var(--fs-xs); }
.detail-meta__title { font-family: var(--ff-display); font-weight: 900; text-transform: uppercase;
    font-size: var(--fs-xl); margin-top: var(--sp-2); }

/* ============================================================
   Power-ups
   ============================================================ */
.topic { margin-bottom: var(--sp-7); }
.topic__head { display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-4); }
.topic__dot { width: 14px; height: 14px; border-radius: 4px; }
.topic__title { font-family: var(--ff-display); font-weight: 900; text-transform: uppercase; font-size: var(--fs-lg); }
.topic__sub { font-size: var(--fs-sm); color: var(--c-ink-dim); }
.pu-card { scroll-snap-align: start; border-radius: var(--radius); overflow: hidden; background: #000;
    position: relative; aspect-ratio: 9/16; border: 1px solid var(--c-line); }
.pu-card video { width: 100%; height: 100%; object-fit: cover; }
.pu-card__cap { position: absolute; left: 0; right: 0; bottom: 0; padding: var(--sp-4);
    background: linear-gradient(to top, rgba(0,0,0,.85), transparent); color: #fff; }
.pu-card__title { font-weight: 800; font-size: var(--fs-sm); }
.pu-card__author { font-size: var(--fs-xs); opacity: .8; }

/* ============================================================
   Plan form
   ============================================================ */
.plan-form { display: grid; gap: var(--sp-5); background: var(--c-surface); border: 1px solid var(--c-line);
    border-radius: var(--radius-lg); padding: var(--sp-6); box-shadow: var(--shadow); }
.field { display: grid; gap: .4rem; }
.field label { font-weight: 700; font-size: var(--fs-sm); }
.field input, .field select, .field textarea { width: 100%; padding: .8rem 1rem; border: 1px solid var(--c-line);
    border-radius: var(--radius-sm); font: inherit; background: var(--c-bg); }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--c-accent); border-color: transparent; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
.chip-group { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.chip { border: 1px solid var(--c-line); border-radius: 999px; padding: .5rem 1rem; font-size: var(--fs-sm);
    font-weight: 600; background: var(--c-bg); }
.chip input { position: absolute; opacity: 0; }
.chip:has(input:checked) { background: var(--c-ink); color: #fff; border-color: var(--c-ink); }

.plan-output { margin-top: var(--sp-6); }
.week { border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; margin-bottom: var(--sp-4); }
.week__head { background: var(--c-bg-alt); padding: var(--sp-4); font-family: var(--ff-display);
    text-transform: uppercase; font-weight: 900; }
.week__body { padding: var(--sp-4); display: grid; gap: var(--sp-3); }
.day { border-bottom: 1px solid var(--c-line-soft); padding-bottom: var(--sp-3); }
.day:last-child { border-bottom: 0; padding-bottom: 0; }
.day__title { font-weight: 800; }

/* ============================================================
   Footer
   ============================================================ */
.site-footer { background: var(--c-ink); color: var(--c-on-dark); margin-top: var(--sp-9); }
.site-footer__inner { display: grid; grid-template-columns: 2fr 1fr; gap: var(--sp-6); padding-block: var(--sp-8); }
.brand--footer .brand__name { color: #fff; }
.site-footer__tagline { color: #A7ADB4; margin-top: var(--sp-3); max-width: 40ch; }
.site-footer__meta { color: #6B7075; font-size: var(--fs-sm); margin-top: var(--sp-2); }
.site-footer__links { display: flex; flex-direction: column; gap: var(--sp-3); }
.site-footer__links a { color: #C7CBD1; font-weight: 600; }
.site-footer__links a:hover { color: var(--c-accent); }
.site-footer__bottom { border-top: 1px solid rgba(255,255,255,.1); padding-block: var(--sp-4); color: #6B7075; }

/* ============================================================
   Utilities & responsive
   ============================================================ */
.center { text-align: center; }
.muted { color: var(--c-ink-dim); }
.mt-6 { margin-top: var(--sp-6); }
.empty-state { text-align: center; padding: var(--sp-8) var(--sp-4); color: var(--c-ink-dim); }
.empty-state svg { width: 48px; height: 48px; margin: 0 auto var(--sp-4); opacity: .4; }

@media (max-width: 720px) {
    .tiles { grid-template-columns: 1fr; }
    .field-row { grid-template-columns: 1fr; }
    .site-footer__inner { grid-template-columns: 1fr; }
    .hero__stats { gap: var(--sp-5); }
}