:root {
  color-scheme: light;
  --bg: #f6f4ef; --ink: #14213d; --muted: #5c6577; --accent: #e85d04; --accent-btn: #e85d04;
  --card: #ffffff; --line: #e3dfd6; --line-soft: #f0ede6; --good: #2a7f62; --good-bg: #e6f4ee;
  --soft-bg: #fff4ea; --bad: #8a1c12; --bad-bg: #fdecea; --err: #b42318; --code-bg: #efece4;
  --chip-bg: #f1f1ee; --hover-line: #fed7aa; --shadow: 20,33,61;
}
/* Modo oscuro: elegido con el botón (data-theme) o, si no se eligió, el del sistema */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f1621; --ink: #e7ecf3; --muted: #9ba7b9; --accent: #ff8a3d; --accent-btn: #e85d04;
  --card: #18212f; --line: #2b3648; --line-soft: #243042; --good: #5cd0a5; --good-bg: #163a2f;
  --soft-bg: #33261b; --bad: #ffb4a8; --bad-bg: #3d1f1c; --err: #ff8f80; --code-bg: #243042;
  --chip-bg: #243042; --hover-line: #8a4a1c; --shadow: 0,0,0;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0f1621; --ink: #e7ecf3; --muted: #9ba7b9; --accent: #ff8a3d; --accent-btn: #e85d04;
    --card: #18212f; --line: #2b3648; --line-soft: #243042; --good: #5cd0a5; --good-bg: #163a2f;
    --soft-bg: #33261b; --bad: #ffb4a8; --bad-bg: #3d1f1c; --err: #ff8f80; --code-bg: #243042;
    --chip-bg: #243042; --hover-line: #8a4a1c; --shadow: 0,0,0;
  }
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
       background: var(--bg); color: var(--ink); line-height: 1.5; }
a { color: inherit; text-decoration: none; }
.top { display: flex; flex-wrap: wrap; gap: .25rem 1rem; align-items: baseline;
       padding: 1rem 1.25rem; border-bottom: 1px solid var(--line); background: var(--card); }
.brand { font-weight: 800; font-size: 1.15rem; }
.tag { color: var(--muted); font-size: .9rem; }
main { max-width: 1040px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
.hero h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); margin: .5rem 0 .25rem; letter-spacing: -.02em; }
.hero p { color: var(--muted); margin: 0 0 1.5rem; max-width: 60ch; }
.grid { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem;
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.card a { display: block; background: var(--card); border: 1px solid var(--line);
          border-radius: 14px; padding: 1.1rem; transition: transform .15s, box-shadow .15s; }
.card a:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(var(--shadow),.08); }
.route { font-weight: 700; font-size: 1.05rem; }
.route span { color: var(--accent); }
.price { font-size: 1.9rem; font-weight: 800; color: var(--accent); margin: .3rem 0; }
.price small { font-size: .8rem; font-weight: 500; color: var(--muted); }
.price.big { font-size: 2.8rem; }
.badge { display: inline-block; background: var(--good-bg); color: var(--good); font-weight: 600;
         font-size: .8rem; padding: .15rem .55rem; border-radius: 999px; }
.meta { color: var(--muted); font-size: .9rem; margin-top: .5rem; }
.empty { color: var(--muted); }
.deal { background: var(--card); border: 1px solid var(--line); border-radius: 16px;
        padding: 1.5rem; max-width: 640px; }
.deal h1 { margin: .5rem 0 0; }
.back { color: var(--muted); font-size: .9rem; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: .3rem 1rem; margin: 1.25rem 0; }
dt { color: var(--muted); }
dd { margin: 0; font-weight: 600; }
.cta { display: inline-block; margin-top: .5rem; background: var(--accent-btn); color: #fff;
       font-weight: 700; padding: .8rem 1.3rem; border-radius: 10px; }
.cta:hover { filter: brightness(1.08); }
footer { max-width: 1040px; margin: 0 auto; padding: 0 1.25rem 2rem; font-size: .85rem; color: var(--muted); }
.muted { opacity: .8; }

/* Países */
.chips { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 2rem; }
.chips a { background: var(--card); border: 1px solid var(--line); border-radius: 999px;
           padding: .35rem .8rem; font-size: .9rem; white-space: nowrap; }
.chips a b { color: var(--accent); margin-left: .2rem; }
.chips a:hover, .chips a.on { border-color: var(--accent); }
.country { margin-bottom: 2.5rem; }
.sec-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
            margin-bottom: .75rem; }
.sec-head h2 { margin: 0; font-size: 1.3rem; }
.sec-head a { color: var(--accent); font-weight: 600; font-size: .9rem; white-space: nowrap; }
.from { color: var(--muted); font-size: .85rem; }
.route .ctry { color: var(--muted); font-weight: 500; font-size: .9rem; }
.sub { color: var(--muted); margin: .1rem 0 0; }

/* Alertas */
.top .nav-alert { margin-left: auto; font-weight: 700; color: var(--accent); }
.alert-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); margin-bottom: 1.5rem; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 1.4rem; }
.panel h2 { margin: 0 0 .75rem; font-size: 1.2rem; }
.panel label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: .9rem; }
.panel input, .panel select { display: block; width: 100%; margin-top: .3rem; padding: .65rem .75rem;
  border: 1px solid var(--line); border-radius: 10px; font: inherit; background: var(--card); color: var(--ink); }
.panel input:focus, .panel select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.panel button.cta { border: 0; cursor: pointer; font: inherit; font-weight: 700; }
.panel button.cta:disabled { opacity: .6; cursor: wait; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; }
.form-msg { min-height: 1.2em; font-weight: 600; }
.form-msg.ok { color: var(--good); }
.form-msg.err { color: var(--err); }
.notice { background: var(--good-bg); color: var(--good); border-radius: 12px; padding: .9rem 1.1rem; font-weight: 600; margin-bottom: 1.25rem; }
.small { font-size: .85rem; }
code { background: var(--code-bg); padding: .05rem .35rem; border-radius: 5px; font-size: .9em; }
.alert-link { display: inline-block; margin: .75rem 0 0 .75rem; color: var(--accent); font-weight: 600; }

/* País del visitante */
.mine { font-size: .75rem; font-weight: 700; color: var(--good); background: var(--good-bg);
        padding: .15rem .5rem; border-radius: 999px; vertical-align: middle; }
.chips a.mine-chip { border-color: var(--accent); font-weight: 700; }
.notice.soft { background: var(--soft-bg); color: var(--ink); font-weight: 500; }
.notice.soft a { color: var(--accent); font-weight: 700; }

/* Ventana emergente */
.popup { border: 0; border-radius: 18px; padding: 1.8rem 1.6rem 1.4rem; max-width: 400px; width: calc(100% - 2rem);
         text-align: center; color: var(--ink); background: var(--card); box-shadow: 0 20px 60px rgba(var(--shadow),.25); }
.popup::backdrop { background: rgba(var(--shadow),.45); }
.popup-icon { font-size: 2.6rem; line-height: 1; }
.popup h2 { margin: .6rem 0 .4rem; }
.popup p { color: var(--muted); margin: 0 0 1.3rem; }
.popup-actions { display: flex; flex-direction: column; align-items: center; gap: .6rem; }
.popup .cta { border: 0; cursor: pointer; font: inherit; font-weight: 700; margin: 0; }
.popup-link { color: var(--accent); font-weight: 600; font-size: .9rem; }
.popup .cta:focus { outline: none; }
.popup .cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* Banderas (imágenes: Windows no muestra los emojis de banderas) */
.flag { width: 20px; height: 15px; border-radius: 2px; vertical-align: -2px; object-fit: cover;
        box-shadow: 0 0 0 1px rgba(var(--shadow),.12); }
h1 .flag { width: 32px; height: 24px; vertical-align: 0; }
h2 .flag { width: 26px; height: 19px; vertical-align: -1px; }

/* Frescura y ofertas terminadas */
.seen { color: var(--muted); font-size: .8rem; margin-top: .35rem; }
.ended { background: var(--bad-bg); color: var(--bad); border-radius: 12px; padding: .8rem 1rem; margin: .5rem 0 1rem; }
.ended a { color: var(--bad); font-weight: 700; margin-left: .25rem; }
.alert-link.strong { display: inline-block; margin: .5rem 0 0; background: var(--accent-btn); color: #fff;
                     padding: .7rem 1.1rem; border-radius: 10px; }

/* Unirse al canal de Telegram */
.tg-join { display: inline-block; margin: 0 0 1rem; background: #229ED9; color: #fff; font-weight: 700;
           padding: .55rem 1rem; border-radius: 999px; font-size: .95rem; }
.tg-join:hover { filter: brightness(1.07); }
.deal.is-ended .price { color: var(--muted); text-decoration: line-through; }
.deal.is-ended .badge { display: none; }
.seen.ok { color: var(--good); font-weight: 600; }

/* Campana de alertas: suena un momento cada 20 s y al pasar el mouse */
.bell { display: inline-block; transform-origin: 50% 10%; animation: bell-ring 20s ease-in-out 1.5s infinite; }
a:hover .bell, a:focus-visible .bell { animation: bell-ring-once .9s ease-in-out; }
@keyframes bell-ring {
  /* el balanceo dura ~0,7 s (3,6% de 20 s); el resto del ciclo queda quieta */
  0%, 3.6%, 100% { transform: rotate(0); }
  0.6% { transform: rotate(16deg); }  1.2% { transform: rotate(-14deg); }
  1.8% { transform: rotate(10deg); }  2.4% { transform: rotate(-6deg); }  3% { transform: rotate(3deg); }
}
@keyframes bell-ring-once {
  0%, 100% { transform: rotate(0); }
  15% { transform: rotate(16deg); }  30% { transform: rotate(-14deg); }
  45% { transform: rotate(10deg); }  60% { transform: rotate(-6deg); }  75% { transform: rotate(3deg); }
}
@media (prefers-reduced-motion: reduce) { .bell { animation: none !important; } }

/* Tarjetas estilo postal: foto (o degradado) del destino arriba */
.card a { padding: 0; overflow: hidden; display: flex; flex-direction: column; height: 100%;
          transition: transform .25s, box-shadow .25s, border-color .25s; }
.card a:hover { transform: translateY(-4px); box-shadow: 0 14px 30px rgba(var(--shadow),.14); border-color: var(--hover-line); }
.card-img { position: relative; height: 150px; overflow: hidden; display: flex; align-items: flex-end; }
.card-img::after { content: ""; position: absolute; inset: 0; pointer-events: none;
                   background: linear-gradient(to top, rgba(0,0,0,.55), rgba(0,0,0,.1) 55%, transparent); }
.card-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.card a:hover .card-img img { transform: scale(1.05); }
.card-img img ~ .card-city { display: none; }  /* con foto no hace falta el nombre grande */
.card-city { position: relative; z-index: 1; color: #fff; font-weight: 800; font-size: 1.6rem; line-height: 1.1;
             padding: 0 1rem .9rem; max-width: 70%; letter-spacing: -.01em; }
.card-ctry { position: absolute; z-index: 1; top: .75rem; left: .75rem; background: rgba(0,0,0,.45); color: #fff;
             font-size: .7rem; font-weight: 600; padding: .25rem .6rem; border-radius: 999px; }
.card-pill { position: absolute; z-index: 1; right: .75rem; bottom: .75rem; background: rgba(255,255,255,.95);
             color: var(--accent); font-weight: 800; font-size: .9rem; padding: .25rem .75rem; border-radius: 999px;
             box-shadow: 0 2px 8px rgba(0,0,0,.15); }
.tone-0 { background: linear-gradient(135deg, #d97706, #ea580c, #be123c); }
.tone-1 { background: linear-gradient(135deg, #0369a1, #4338ca, #1e293b); }
.tone-2 { background: linear-gradient(135deg, #06b6d4, #14b8a6, #2563eb); }
.tone-3 { background: linear-gradient(135deg, #059669, #0d9488, #134e4a); }
.tone-4 { background: linear-gradient(135deg, #9333ea, #c026d3, #4c1d95); }
.tone-5 { background: linear-gradient(135deg, #b45309, #92400e, #44403c); }
.card-body { padding: 1rem 1.1rem 1.1rem; display: flex; flex-direction: column; flex: 1; }
.card-body .route { margin: 0; font-size: 1rem; line-height: 1.35; }
.card-body .price { font-size: 1.6rem; margin: .45rem 0 .2rem; }
.card-body .badge { align-self: flex-start; }
.card-body .meta { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; font-size: .82rem; }
.stops { background: var(--chip-bg); color: var(--muted); font-weight: 500; font-size: .75rem; padding: .1rem .55rem; border-radius: 999px; }
.stops.direct { background: var(--good-bg); color: var(--good); font-weight: 600; }
.card-body .seen { margin-top: auto; padding-top: .7rem; border-top: 1px solid var(--line-soft); }
.card-body .meta { margin-bottom: .8rem; }
@media (prefers-reduced-motion: reduce) { .card a, .card-img img { transition: none; } .card a:hover { transform: none; } }

/* Logo SVG en el encabezado */
.top { align-items: center; padding-top: .5rem; padding-bottom: .5rem; }
.brand img { display: block; height: 64px; width: auto; }
@media (max-width: 480px) { .brand img { height: 50px; } }

/* Botón de modo claro / oscuro */
.theme-toggle { border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 999px;
                width: 2.4rem; height: 2.4rem; font-size: 1.1rem; line-height: 1; cursor: pointer; padding: 0;
                display: inline-grid; place-items: center; transition: border-color .2s, transform .2s; }
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle:active { transform: scale(.92); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.theme-toggle .moon, :root[data-theme="dark"] .theme-toggle .sun { display: inline; }
.theme-toggle .sun, :root[data-theme="dark"] .theme-toggle .moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .sun { display: inline; }
  :root:not([data-theme="light"]) .theme-toggle .moon { display: none; }
}
/* Logo: versión clara u oscura según el modo */
.brand .logo-dark, :root[data-theme="dark"] .brand .logo-light { display: none; }
:root[data-theme="dark"] .brand .logo-dark { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .brand .logo-light { display: none; }
  :root:not([data-theme="light"]) .brand .logo-dark { display: block; }
}

/* Páginas por ruta (/vuelos/...) */
.crumbs { font-size: .85rem; color: var(--muted); margin-bottom: .5rem; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--accent); }
.stats { display: grid; gap: .75rem; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); margin: 0 0 1.25rem; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: .9rem 1rem; }
.stat span { display: block; color: var(--muted); font-size: .8rem; }
.stat b { display: block; font-size: 1.5rem; color: var(--accent); margin: .15rem 0; }
.stat small { color: var(--muted); font-size: .8rem; }
.panel + .panel, .panel + section, section + .panel { margin-top: 1rem; }
.deal-now .price { margin: .3rem 0 .8rem; }
.chart { width: 100%; height: auto; color: var(--accent); }
.chart .axis { font-size: 12px; fill: var(--muted); }
table.months { width: 100%; border-collapse: collapse; }
table.months th, table.months td { text-align: left; padding: .45rem .3rem; border-bottom: 1px solid var(--line); }
table.months th { color: var(--muted); font-weight: 600; font-size: .85rem; }
table.months tr.best td { color: var(--good); font-weight: 700; }
.faq details { border-bottom: 1px solid var(--line); padding: .6rem 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { margin: .5rem 0 0; color: var(--muted); }
.related { margin-top: 1.5rem; }
.related h2 { font-size: 1.15rem; }
.related ul { list-style: none; padding: 0; display: grid; gap: .5rem; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.related a { display: flex; justify-content: space-between; gap: .5rem; background: var(--card); border: 1px solid var(--line);
             border-radius: 10px; padding: .55rem .8rem; }
.related a:hover { border-color: var(--accent); }
.related a span { color: var(--muted); font-size: .85rem; white-space: nowrap; }