/* ==========================================================
   AgroSaber — Hoja de estilos
   Paleta verde/tierra, diseño limpio y responsive.
   ========================================================== */

:root {
  --verde: #2f7d32;
  --verde-osc: #1b5e20;
  --verde-claro: #66bb6a;
  --verde-suave: #e8f2e6;
  --tierra: #7a5230;
  --tierra-claro: #a1662f;
  --crema: #f7f6f1;
  --crema-2: #fbfaf5;
  --tinta: #1f2a24;
  --gris: #5c6b60;
  --gris-claro: #8a978c;
  --linea: #e4e6df;
  --blanco: #ffffff;
  --amarillo: #f4b400;
  --rojo: #c0392b;
  --rojo-bg: #fdecea;
  --verde-bg: #eaf6ea;
  --radio: 14px;
  --radio-sm: 9px;
  --sombra: 0 6px 24px rgba(30, 50, 30, 0.08);
  --sombra-lg: 0 14px 40px rgba(30, 50, 30, 0.14);
  --ancho: 1120px;
  --fuente: 'Segoe UI', system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--fuente);
  color: var(--tinta);
  background: var(--crema);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--verde-osc); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.2; color: var(--tinta); font-weight: 700; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); }
h3 { font-size: 1.25rem; }

.container { width: 100%; max-width: var(--ancho); margin: 0 auto; padding: 0 20px; }

.muted { color: var(--gris); }
.section { padding: 72px 0; }
.section-tight { padding: 48px 0; }
.text-center { text-align: center; }
.lead { font-size: 1.15rem; color: var(--gris); max-width: 640px; }
.section-head { max-width: 680px; margin: 0 auto 44px; text-align: center; }
.section-head .lead { margin: 12px auto 0; }
.eyebrow {
  display: inline-block; text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 0.78rem; font-weight: 700; color: var(--verde);
  background: var(--verde-suave); padding: 5px 12px; border-radius: 999px; margin-bottom: 14px;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: inherit; font-size: 0.98rem; font-weight: 600; cursor: pointer;
  padding: 12px 22px; border-radius: var(--radio-sm); border: 1.5px solid transparent;
  transition: transform .08s ease, box-shadow .15s ease, background .15s ease; text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-sm { padding: 8px 15px; font-size: 0.88rem; }
.btn-lg { padding: 15px 30px; font-size: 1.05rem; }
.btn-block { width: 100%; }
.btn-primary { background: var(--verde); color: #fff; box-shadow: 0 6px 16px rgba(47,125,50,.28); }
.btn-primary:hover { background: var(--verde-osc); color: #fff; }
.btn-tierra { background: var(--tierra); color: #fff; }
.btn-tierra:hover { background: var(--tierra-claro); color: #fff; }
.btn-outline { background: transparent; color: var(--verde-osc); border-color: var(--verde); }
.btn-outline:hover { background: var(--verde-suave); color: var(--verde-osc); }
.btn-ghost { background: transparent; color: var(--tinta); border-color: var(--linea); }
.btn-ghost:hover { background: var(--crema); }
.btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }
.inline-form { display: inline; }

/* ---------- Header ---------- */
.site-header, .admin-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251,250,245,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--linea);
}
.admin-header { background: var(--verde-osc); border-bottom: none; }
.admin-header .brand-name, .admin-header .muted { color: #eafaf0; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 800; font-size: 1.3rem; }
.brand:hover { text-decoration: none; }
.brand-mark { font-size: 1.4rem; }
.brand-name { color: var(--tinta); }
.brand-name span { color: var(--verde); }
.main-nav { display: flex; align-items: center; gap: 22px; }
.main-nav a { color: var(--tinta); font-weight: 500; }
.main-nav a.active { color: var(--verde); font-weight: 700; }
.main-nav a:hover { color: var(--verde); text-decoration: none; }

.nav-toggle, .nav-toggle-label { display: none; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(102,187,106,.20), transparent 60%),
    linear-gradient(180deg, var(--verde-suave), var(--crema) 70%);
  padding: 80px 0 70px;
}
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero h1 { margin-bottom: 18px; }
.hero h1 .hl { color: var(--verde-osc); }
.hero p.lead { margin-bottom: 28px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-badges { display: flex; gap: 22px; margin-top: 30px; flex-wrap: wrap; }
.hero-badge { display: flex; align-items: center; gap: 9px; font-size: .92rem; color: var(--gris); }
.hero-badge b { color: var(--tinta); }
.hero-art {
  background: linear-gradient(155deg, var(--verde) 0%, var(--verde-osc) 100%);
  border-radius: 24px; padding: 34px; color: #fff; box-shadow: var(--sombra-lg);
  position: relative; overflow: hidden;
}
.hero-art::after {
  content: "🌾"; position: absolute; right: -10px; bottom: -20px; font-size: 8rem; opacity: .15;
}
.hero-art h3 { color: #fff; font-size: 1.15rem; margin-bottom: 18px; }
.hero-stat-row { display: flex; gap: 26px; flex-wrap: wrap; }
.hero-stat b { display: block; font-size: 2rem; line-height: 1; }
.hero-stat span { font-size: .85rem; opacity: .9; }
.hero-list { list-style: none; margin-top: 22px; display: grid; gap: 10px; }
.hero-list li { display: flex; gap: 10px; align-items: flex-start; font-size: .95rem; }
.hero-list li::before { content: "✓"; font-weight: 800; color: #d9f2d0; }

/* ---------- Stats band ---------- */
.stats-band { background: var(--verde-osc); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat b { display: block; font-size: 2.4rem; line-height: 1; color: #fff; }
.stat span { font-size: .95rem; opacity: .88; }

/* ---------- Áreas ---------- */
.areas-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; }
.area-card {
  background: #fff; border: 1px solid var(--linea); border-radius: var(--radio);
  padding: 26px 22px; text-align: center; transition: .15s; box-shadow: var(--sombra);
}
.area-card:hover { transform: translateY(-4px); box-shadow: var(--sombra-lg); text-decoration: none; }
.area-icon {
  width: 58px; height: 58px; margin: 0 auto 14px; border-radius: 16px;
  display: grid; place-items: center; font-size: 1.7rem; background: var(--verde-suave);
}
.area-card h3 { font-size: 1.08rem; margin-bottom: 6px; }
.area-card p { font-size: .9rem; color: var(--gris); }

/* ---------- Cards / grids ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.course-card {
  background: #fff; border: 1px solid var(--linea); border-radius: var(--radio);
  overflow: hidden; display: flex; flex-direction: column; box-shadow: var(--sombra); transition: .15s;
}
.course-card:hover { transform: translateY(-4px); box-shadow: var(--sombra-lg); }
.course-thumb {
  height: 148px; background: linear-gradient(135deg, var(--verde-claro), var(--verde-osc));
  display: grid; place-items: center; font-size: 3.4rem; color: #fff; position: relative;
}
.course-thumb .area-tag {
  position: absolute; top: 12px; left: 12px; background: rgba(255,255,255,.92);
  color: var(--verde-osc); font-size: .74rem; font-weight: 700; padding: 4px 10px; border-radius: 999px;
}
.course-body { padding: 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.course-body h3 { font-size: 1.12rem; }
.course-meta { display: flex; gap: 14px; font-size: .82rem; color: var(--gris-claro); flex-wrap: wrap; }
.course-body p { font-size: .92rem; color: var(--gris); flex: 1; }
.course-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 6px; }
.price-from { font-size: .78rem; color: var(--gris-claro); }
.price-from b { display: block; font-size: 1.25rem; color: var(--verde-osc); }

/* ---------- Filtros ---------- */
.filters { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 38px; }
.chip {
  padding: 8px 16px; border-radius: 999px; border: 1.5px solid var(--linea);
  background: #fff; font-size: .9rem; font-weight: 600; color: var(--tinta); cursor: pointer;
}
.chip:hover { border-color: var(--verde-claro); text-decoration: none; }
.chip.active { background: var(--verde); color: #fff; border-color: var(--verde); }

/* ---------- Detalle de curso ---------- */
.detail-hero { background: linear-gradient(180deg, var(--verde-suave), var(--crema)); padding: 44px 0; }
.detail-grid { display: grid; grid-template-columns: 1.4fr .9fr; gap: 40px; align-items: start; }
.breadcrumb { font-size: .85rem; color: var(--gris); margin-bottom: 14px; }
.breadcrumb a { color: var(--gris); }
.detail-side {
  background: #fff; border: 1px solid var(--linea); border-radius: var(--radio);
  padding: 24px; box-shadow: var(--sombra); position: sticky; top: 88px;
}
.detail-side .thumb {
  height: 130px; border-radius: var(--radio-sm); background: linear-gradient(135deg, var(--verde-claro), var(--verde-osc));
  display: grid; place-items: center; font-size: 3rem; color: #fff; margin-bottom: 16px;
}
.meta-list { list-style: none; display: grid; gap: 10px; margin: 6px 0 0; }
.meta-list li { display: flex; justify-content: space-between; font-size: .92rem; border-bottom: 1px dashed var(--linea); padding-bottom: 8px; }
.meta-list li span:first-child { color: var(--gris); }

/* ---------- Precios / niveles ---------- */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 10px; }
.tier {
  background: #fff; border: 1.5px solid var(--linea); border-radius: var(--radio);
  padding: 26px 22px; display: flex; flex-direction: column; position: relative;
}
.tier.destacado { border-color: var(--verde); box-shadow: var(--sombra-lg); }
.tier .badge-top {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--verde); color: #fff; font-size: .74rem; font-weight: 700;
  padding: 5px 14px; border-radius: 999px; white-space: nowrap;
}
.tier h3 { font-size: 1.2rem; }
.tier .price { font-size: 2rem; font-weight: 800; color: var(--verde-osc); margin: 10px 0 2px; }
.tier .price small { font-size: .8rem; color: var(--gris); font-weight: 500; }
.tier ul { list-style: none; margin: 16px 0 22px; display: grid; gap: 10px; flex: 1; }
.tier ul li { display: flex; gap: 9px; font-size: .92rem; align-items: flex-start; }
.tier ul li::before { content: "✓"; color: var(--verde); font-weight: 800; }

/* ---------- Testimonios ---------- */
.testi-card {
  background: #fff; border: 1px solid var(--linea); border-radius: var(--radio);
  padding: 26px; box-shadow: var(--sombra); display: flex; flex-direction: column; gap: 14px;
}
.testi-card .stars { color: var(--amarillo); letter-spacing: 2px; }
.testi-card p { font-size: .98rem; }
.testi-who { display: flex; align-items: center; gap: 12px; margin-top: auto; }
.testi-avatar {
  width: 44px; height: 44px; border-radius: 50%; background: var(--verde-suave);
  color: var(--verde-osc); display: grid; place-items: center; font-weight: 800;
}
.testi-who b { display: block; font-size: .95rem; }
.testi-who span { font-size: .82rem; color: var(--gris); }

/* ---------- Blog ---------- */
.post-card {
  background: #fff; border: 1px solid var(--linea); border-radius: var(--radio);
  overflow: hidden; display: flex; flex-direction: column; box-shadow: var(--sombra); transition: .15s;
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--sombra-lg); }
.post-cover { height: 140px; background: linear-gradient(135deg, var(--tierra-claro), var(--tierra)); display: grid; place-items: center; font-size: 3rem; }
.post-body { padding: 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.post-tag { font-size: .76rem; font-weight: 700; color: var(--tierra); text-transform: uppercase; letter-spacing: .04em; }
.post-body h3 { font-size: 1.1rem; }
.post-body p { font-size: .9rem; color: var(--gris); flex: 1; }
.post-meta { font-size: .8rem; color: var(--gris-claro); }

.article { max-width: 760px; margin: 0 auto; }
.article h1 { margin: 12px 0 10px; }
.article .article-meta { color: var(--gris); font-size: .9rem; margin-bottom: 26px; }
.article p { margin-bottom: 18px; font-size: 1.05rem; }
.article-cover { height: 260px; border-radius: var(--radio); background: linear-gradient(135deg, var(--tierra-claro), var(--tierra)); display: grid; place-items: center; font-size: 5rem; margin-bottom: 26px; }

/* ---------- Formularios ---------- */
.form-wrap { max-width: 460px; margin: 56px auto; }
.card {
  background: #fff; border: 1px solid var(--linea); border-radius: var(--radio);
  padding: 32px; box-shadow: var(--sombra);
}
.card-lg { padding: 36px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: .9rem; font-weight: 600; margin-bottom: 6px; }
.form-control {
  width: 100%; padding: 11px 13px; font-family: inherit; font-size: 1rem;
  border: 1.5px solid var(--linea); border-radius: var(--radio-sm); background: #fff; color: var(--tinta);
}
.form-control:focus { outline: none; border-color: var(--verde-claro); box-shadow: 0 0 0 3px var(--verde-suave); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-hint { font-size: .82rem; color: var(--gris); margin-top: 5px; }
.form-foot { margin-top: 22px; }
.form-alt { text-align: center; margin-top: 18px; font-size: .92rem; color: var(--gris); }

/* ---------- Alertas ---------- */
.alert { border-radius: var(--radio-sm); padding: 14px 16px; margin-bottom: 18px; font-size: .92rem; }
.alert-error { background: var(--rojo-bg); color: var(--rojo); border: 1px solid #f5c6c0; }
.alert-success { background: var(--verde-bg); color: var(--verde-osc); border: 1px solid #bfe3bf; }
.alert-info { background: #eef4fb; color: #2c5d8f; border: 1px solid #cfe0f2; }
.alert ul { margin: 6px 0 0 18px; }

/* ---------- Badges ---------- */
.badge { display: inline-block; font-size: .74rem; font-weight: 700; padding: 3px 10px; border-radius: 999px; }
.badge-green { background: var(--verde-suave); color: var(--verde-osc); }
.badge-tierra { background: #f1e6da; color: var(--tierra); }
.badge-gray { background: #eceee9; color: var(--gris); }
.badge-amber { background: #fdf3d6; color: #9a6b00; }

/* ---------- Checkout ---------- */
.checkout-grid { display: grid; grid-template-columns: 1.3fr .9fr; gap: 32px; align-items: start; }
.summary {
  background: #fff; border: 1px solid var(--linea); border-radius: var(--radio);
  padding: 24px; box-shadow: var(--sombra); position: sticky; top: 88px;
}
.summary-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--linea); }
.summary-total { display: flex; justify-content: space-between; padding-top: 14px; font-size: 1.3rem; font-weight: 800; color: var(--verde-osc); }
.card-brands { display: flex; gap: 8px; margin-top: 4px; font-size: 1.5rem; }
.sandbox-note { font-size: .82rem; }
.test-card-box { background: var(--crema); border: 1px dashed var(--linea); border-radius: var(--radio-sm); padding: 12px 14px; font-size: .82rem; margin-top: 14px; }
.test-card-box code { background: #fff; padding: 1px 6px; border-radius: 4px; border: 1px solid var(--linea); }

/* ---------- Panel cliente ---------- */
.panel-hero { background: linear-gradient(180deg, var(--verde-suave), var(--crema)); padding: 40px 0; }
.panel-tabs-title { display: flex; align-items: center; gap: 10px; margin: 34px 0 18px; }
.panel-tabs-title h2 { font-size: 1.4rem; }
.mini-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.mini-stat { background: #fff; border: 1px solid var(--linea); border-radius: var(--radio); padding: 18px 20px; box-shadow: var(--sombra); }
.mini-stat b { display: block; font-size: 1.8rem; color: var(--verde-osc); }
.mini-stat span { font-size: .88rem; color: var(--gris); }

.item-row {
  display: flex; align-items: center; gap: 16px; background: #fff; border: 1px solid var(--linea);
  border-radius: var(--radio); padding: 16px 20px; box-shadow: var(--sombra); margin-bottom: 14px; flex-wrap: wrap;
}
.item-icon { width: 50px; height: 50px; border-radius: 12px; background: var(--verde-suave); display: grid; place-items: center; font-size: 1.5rem; flex-shrink: 0; }
.item-main { flex: 1; min-width: 200px; }
.item-main h4 { font-size: 1.05rem; }
.item-main .item-sub { font-size: .86rem; color: var(--gris); }
.item-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.empty-state { text-align: center; padding: 40px 20px; color: var(--gris); background: #fff; border: 1px dashed var(--linea); border-radius: var(--radio); }
.empty-state .em { font-size: 2.4rem; display: block; margin-bottom: 8px; }

/* ---------- Tablas admin ---------- */
.admin-body { background: #f2f4f0; }
.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--linea); border-radius: var(--radio); box-shadow: var(--sombra); }
table.data { width: 100%; border-collapse: collapse; min-width: 560px; }
table.data th, table.data td { text-align: left; padding: 13px 16px; font-size: .9rem; border-bottom: 1px solid var(--linea); }
table.data th { background: var(--crema); font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--gris); }
table.data tr:last-child td { border-bottom: none; }
table.data tbody tr:hover { background: #fafbf8; }
.admin-footer { padding: 24px 0; text-align: center; }
.admin-section-title { margin: 36px 0 14px; font-size: 1.25rem; }
.admin-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.admin-stat { background: #fff; border: 1px solid var(--linea); border-radius: var(--radio); padding: 22px; box-shadow: var(--sombra); }
.admin-stat .ico { font-size: 1.6rem; }
.admin-stat b { display: block; font-size: 1.9rem; color: var(--verde-osc); margin-top: 6px; }
.admin-stat span { color: var(--gris); font-size: .9rem; }

/* ---------- Éxito ---------- */
.success-wrap { max-width: 620px; margin: 60px auto; text-align: center; }
.success-check { width: 84px; height: 84px; border-radius: 50%; background: var(--verde-bg); color: var(--verde); display: grid; place-items: center; font-size: 2.6rem; margin: 0 auto 20px; }

/* ---------- CTA band ---------- */
.cta-band { background: linear-gradient(120deg, var(--tierra), var(--tierra-claro)); color: #fff; border-radius: 22px; padding: 46px; text-align: center; box-shadow: var(--sombra-lg); }
.cta-band h2 { color: #fff; margin-bottom: 12px; }
.cta-band p { opacity: .95; max-width: 560px; margin: 0 auto 24px; }

/* ---------- Error ---------- */
.error-wrap { max-width: 520px; margin: 90px auto; text-align: center; }
.error-code { font-size: 5rem; font-weight: 800; color: var(--verde-claro); line-height: 1; }

/* ---------- Footer ---------- */
.site-footer { background: #14261a; color: #cfe0d3; margin-top: 60px; padding: 54px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 30px; }
.site-footer h4 { color: #fff; font-size: .95rem; margin-bottom: 14px; }
.site-footer a { display: block; color: #cfe0d3; font-size: .92rem; margin-bottom: 8px; }
.site-footer a:hover { color: #fff; }
.site-footer .brand-name { color: #fff; }
.site-footer .muted { color: #9db3a2; }
.brand-footer { margin-bottom: 12px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 36px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); font-size: .82rem; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .detail-grid, .checkout-grid { grid-template-columns: 1fr; }
  .detail-side, .summary { position: static; }
  .grid-3, .pricing-grid, .admin-cards { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle-label {
    display: inline-flex; flex-direction: column; justify-content: center;
    width: 42px; height: 40px; cursor: pointer; gap: 5px;
  }
  .nav-toggle-label span, .nav-toggle-label::before, .nav-toggle-label::after {
    content: ""; height: 2.5px; width: 24px; background: var(--tinta); border-radius: 2px; transition: .2s;
  }
  .admin-header .nav-toggle-label span, .admin-header .nav-toggle-label::before, .admin-header .nav-toggle-label::after { background: #fff; }
  .main-nav {
    position: absolute; top: 68px; left: 0; right: 0; background: var(--crema-2);
    flex-direction: column; align-items: stretch; gap: 0; padding: 8px 16px 16px;
    border-bottom: 1px solid var(--linea); box-shadow: var(--sombra); display: none;
  }
  .main-nav a, .main-nav .inline-form { padding: 12px 4px; border-bottom: 1px solid var(--linea); }
  .main-nav .btn { margin-top: 10px; }
  .nav-toggle:checked ~ .main-nav { display: flex; }
}

@media (max-width: 560px) {
  .grid-3, .grid-2, .pricing-grid, .admin-cards, .mini-stats, .form-row, .stats-grid, .footer-grid {
    grid-template-columns: 1fr;
  }
  .section { padding: 52px 0; }
  .cta-band { padding: 32px 22px; }
  .footer-bottom { flex-direction: column; }
}