/* ==========================================================================
   IPTV System — hoja de estilos de la página de producto
   --------------------------------------------------------------------------
   La paleta es exactamente la de las aplicaciones (desktop/ui/theme.py y
   mobile/ui/theme/Theme.kt). No es decoración: quien llega desde la página al
   programa instalado tiene que reconocer que es el mismo producto.

   Sin dependencias externas: ni fuentes de Google ni frameworks. La página
   tiene que abrirse igual desde un servidor, desde un pendrive o desde el
   escritorio de quien la revisa.
   ========================================================================== */

:root {
    /* Paleta compartida con las aplicaciones */
    --bg: #0d1117;
    --bg-soft: #10161f;
    --surface: #161b22;
    --surface-alt: #1c232d;
    --surface-hover: #232c38;
    --border: #2a323d;
    --border-soft: #212932;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --text-dim: #6e7781;
    --accent: #2f81f7;
    --accent-hover: #4d95f8;
    --accent-press: #1f6feb;
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;

    --radius: 14px;
    --radius-sm: 9px;
    --maxw: 1180px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
        Arial, "Noto Sans", sans-serif;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 650; }
h3 { font-size: 1.18rem; font-weight: 600; }
p { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section--tight { padding: 56px 0; }
.section--alt { background: var(--bg-soft); border-block: 1px solid var(--border-soft); }

.lead { font-size: 1.13rem; color: var(--text-muted); max-width: 62ch; }
.muted { color: var(--text-muted); }
.small { font-size: .88rem; }
.mono { font-family: var(--mono); font-size: .82rem; }

code {
    font-family: var(--mono);
    font-size: .85em;
    background: var(--surface-alt);
    border: 1px solid var(--border);
    padding: 2px 7px;
    border-radius: 5px;
    color: var(--text);
    white-space: nowrap;
}

.eyebrow {
    display: inline-block;
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 14px;
}

.section-head { max-width: 62ch; margin-bottom: 42px; }

/* ------------------------------------------------------------------ cabecera */

.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(13, 17, 23, .82);
    backdrop-filter: saturate(160%) blur(12px);
    border-bottom: 1px solid var(--border-soft);
}

.header__inner {
    display: flex;
    align-items: center;
    gap: 28px;
    height: 68px;
}

.brand { display: flex; align-items: center; gap: 11px; color: var(--text); font-weight: 650; }
.brand:hover { color: var(--text); }
.brand__mark { width: 32px; height: 32px; border-radius: 8px; }
.brand__name { font-size: 1.05rem; letter-spacing: -.01em; }

.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a { color: var(--text-muted); font-size: .95rem; font-weight: 500; }
.nav a:hover { color: var(--text); }

.header__actions { display: flex; align-items: center; gap: 12px; }

.lang {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: 999px;
    overflow: hidden;
    background: var(--surface);
}
.lang button {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--text-muted);
    font: inherit;
    font-size: .84rem;
    font-weight: 600;
    padding: 6px 13px;
    cursor: pointer;
}
.lang button[aria-pressed="true"] { background: var(--accent); color: #fff; }

/* -------------------------------------------------------------------- botones */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 13px 22px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-weight: 600;
    font-size: .97rem;
    cursor: pointer;
    transition: transform .12s ease, background .15s ease, border-color .15s ease;
    white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-hover); color: #fff; }
.btn--ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn--ghost:hover { background: var(--surface-hover); color: var(--text); border-color: #3a4552; }
.btn--sm { padding: 9px 16px; font-size: .9rem; }
.btn__meta { font-weight: 500; opacity: .75; font-size: .82rem; }

/* ---------------------------------------------------------------------- hero */

.hero {
    position: relative;
    overflow: hidden;
    padding: 84px 0 72px;
    border-bottom: 1px solid var(--border-soft);
}
.hero::before {
    content: "";
    position: absolute;
    inset: -40% 30% auto -10%;
    height: 620px;
    background: radial-gradient(closest-side, rgba(47, 129, 247, .22), transparent 70%);
    pointer-events: none;
}
.hero__grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 56px;
    align-items: center;
}
.hero h1 { margin-bottom: 18px; }
.hero h1 .accent { color: var(--accent); }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 18px; }
.hero__note { font-size: .87rem; color: var(--text-dim); }

.stats { display: flex; flex-wrap: wrap; gap: 30px; margin-top: 34px; }
.stat__value { font-size: 1.5rem; font-weight: 700; color: var(--text); }
.stat__label { font-size: .82rem; color: var(--text-muted); }

/* ------------------------------------------------------------------- tarjetas */

.grid { display: grid; gap: 20px; }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: #3a4552; transform: translateY(-2px); }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--text-muted); margin: 0; font-size: .96rem; }

.card__icon {
    width: 40px; height: 40px;
    display: grid; place-items: center;
    border-radius: 10px;
    background: rgba(47, 129, 247, .14);
    color: var(--accent);
    margin-bottom: 16px;
}
.card__icon svg { width: 21px; height: 21px; }

.platform-card { display: flex; flex-direction: column; }
.platform-card__tag {
    align-self: flex-start;
    font-size: .74rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
    color: var(--text-muted);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 3px 10px;
    margin-bottom: 14px;
}
.platform-card__tag--new { color: var(--accent); border-color: rgba(47, 129, 247, .5); }
.platform-card ul { margin: 14px 0 22px; padding-left: 18px; color: var(--text-muted); font-size: .94rem; }
.platform-card li { margin-bottom: 5px; }
.platform-card .btn { margin-top: auto; }

/* ------------------------------------------------------------------- maquetas */

.mock {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 24px 60px rgba(0, 0, 0, .45);
}
.mock__bar {
    display: flex; align-items: center; gap: 7px;
    padding: 10px 14px;
    background: var(--surface-alt);
    border-bottom: 1px solid var(--border);
}
.mock__dot { width: 10px; height: 10px; border-radius: 50%; background: #39414d; }
.mock__title { margin-left: 8px; font-size: .8rem; color: var(--text-muted); }
.mock__body { display: block; background: #0a0d12; }
.mock__body svg { display: block; width: 100%; height: auto; }

.tv-frame {
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 12px;
    background: linear-gradient(180deg, #1a212b, #10151c);
    box-shadow: 0 30px 70px rgba(0, 0, 0, .5);
}
.tv-frame__screen { border-radius: 8px; overflow: hidden; background: #000; }
.tv-frame__stand {
    width: 24%; height: 10px; margin: 12px auto 0;
    border-radius: 0 0 6px 6px;
    background: linear-gradient(180deg, #262f3a, #171d25);
}

/* ------------------------------------------------------------------ descargas */

.download-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    font-size: .94rem;
}
.download-table th, .download-table td {
    text-align: left;
    padding: 15px 18px;
    border-bottom: 1px solid var(--border-soft);
    vertical-align: middle;
}
.download-table th {
    font-size: .78rem; letter-spacing: .08em; text-transform: uppercase;
    color: var(--text-muted); font-weight: 600;
    background: var(--surface-alt);
}
.download-table tr:last-child td { border-bottom: 0; }
.download-table .hash { font-family: var(--mono); font-size: .74rem; color: var(--text-dim); word-break: break-all; }

.file-name { display: flex; align-items: center; gap: 12px; font-weight: 600; }
.file-name small { display: block; font-weight: 400; color: var(--text-muted); font-size: .84rem; }

/* --------------------------------------------------------------------- pasos */

.steps { counter-reset: step; display: grid; gap: 16px; }
.step {
    display: grid;
    grid-template-columns: 34px 1fr;
    gap: 16px;
    align-items: start;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 18px 20px;
}
.step::before {
    counter-increment: step;
    content: counter(step);
    display: grid; place-items: center;
    width: 34px; height: 34px;
    border-radius: 50%;
    background: rgba(47, 129, 247, .16);
    color: var(--accent);
    font-weight: 700; font-size: .95rem;
}
.step p { margin: 0; color: var(--text-muted); font-size: .95rem; }
.step strong { color: var(--text); }
/* --------------------------------------------------------------------- teclas */

.keys { display: grid; gap: 10px; }
.key-row { display: grid; grid-template-columns: 132px 1fr; gap: 16px; align-items: center; }
.kbd {
    display: inline-block;
    font-family: var(--mono); font-size: .78rem; font-weight: 600;
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-bottom-width: 3px;
    border-radius: 7px;
    padding: 5px 10px;
    color: var(--text);
    text-align: center;
    min-width: 100%;
}
.key-row span { color: var(--text-muted); font-size: .95rem; }

/* ------------------------------------------------------------------------ faq */

.faq { border-top: 1px solid var(--border-soft); }
.faq details {
    border-bottom: 1px solid var(--border-soft);
    padding: 18px 0;
}
.faq summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 1.02rem;
    list-style: none;
    display: flex;
    justify-content: space-between;
    gap: 20px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-weight: 700; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 12px 0 0; color: var(--text-muted); max-width: 78ch; }

/* -------------------------------------------------------------------- avisos */

.notice {
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 3px solid var(--warning);
    border-radius: var(--radius-sm);
    padding: 20px 24px;
}
.notice h3 { color: var(--warning); font-size: 1rem; margin-bottom: 6px; }
.notice p { margin: 0; color: var(--text-muted); font-size: .95rem; }

/* --------------------------------------------------------------------- footer */

.footer {
    border-top: 1px solid var(--border-soft);
    padding: 44px 0 56px;
    color: var(--text-dim);
    font-size: .9rem;
}
.footer__inner { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: center; }
.footer a { color: var(--text-muted); }
.footer a:hover { color: var(--text); }
.footer__links { display: flex; flex-wrap: wrap; gap: 20px; }

/* ------------------------------------------------------------- aparición suave */

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
    .card:hover { transform: none; }
}

/* ------------------------------------------------------------------ adaptable */

@media (max-width: 980px) {
    .hero__grid { grid-template-columns: 1fr; gap: 40px; }
    .grid--3 { grid-template-columns: 1fr 1fr; }
    .nav { display: none; }
}

@media (max-width: 720px) {
    .section { padding: 60px 0; }
    .grid--3, .grid--2 { grid-template-columns: 1fr; }
    .key-row { grid-template-columns: 108px 1fr; }
    .download-table thead { display: none; }
    .download-table, .download-table tbody, .download-table tr, .download-table td { display: block; width: 100%; }
    .download-table tr { border-bottom: 1px solid var(--border); }
    .download-table td { border: 0; padding: 8px 18px; }
    .download-table td:first-child { padding-top: 18px; }
    .download-table td:last-child { padding-bottom: 18px; }
}