/* ============================================
   style.css — Termopaneles del Sur
   ============================================ */

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

:root {
  --blue: #1a3a6b;
  --blue-light: #2a5298;
  --blue-dark: #0d1f3c;
  --red: #c0392b;
  --bg: #f5f6fa;
  --dark: #1a1a2e;
  --text: #333;
  --muted: #666;
  --card: #fff;
  --radius: 14px;
  --shadow: 0 2px 12px rgba(0,0,0,0.07);
  --shadow-hover: 0 8px 28px rgba(0,0,0,0.13);
}

html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; color: var(--text); background: #fff; }

/* ── NAV ── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e8e8e8;
  padding: 0 5%;
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--dark);
  font-weight: 800; font-size: 1.25rem;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  text-decoration: none; color: var(--text);
  font-size: 0.92rem; font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--blue); }
.btn-nav {
  background: var(--blue); color: #fff !important;
  padding: 9px 20px; border-radius: 8px;
  font-weight: 600 !important; font-size: 0.88rem !important;
  transition: background .2s !important;
}
.btn-nav:hover { background: var(--blue-light) !important; }

/* hamburger */
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s; }
.mobile-menu {
  display: none; position: fixed; top: 68px; left: 0; right: 0; z-index: 99;
  background: #fff; border-bottom: 1px solid #e8e8e8;
  flex-direction: column; padding: 20px 5%; gap: 16px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a { text-decoration: none; color: var(--text); font-size: 1rem; font-weight: 500; }
.mobile-menu .btn-nav { text-align: center; background: var(--blue); color: #fff !important; padding: 12px; border-radius: 8px; }

/* ── HERO ── */
#inicio {
  position: relative; min-height: 600px;
  display: flex; align-items: center; justify-content: center;
  text-align: center; overflow: hidden;
  background: linear-gradient(160deg, #0d1f3c 0%, #1a3a6b 50%, #2a5298 100%);
}
@media (min-width: 769px) { #inicio { min-height: 88vh; } }
.hero-overlay {
  position: absolute; inset: 0;
  background: url('https://images.unsplash.com/photo-1487958449943-2429e8be8625?w=1600&q=80') center/cover no-repeat;
  opacity: 0.25;
}
.hero-content { position: relative; z-index: 2; max-width: 780px; padding: 0 24px; }
.hero-content h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800; color: #fff; line-height: 1.15; margin-bottom: 20px;
}
.hero-content p {
  font-size: clamp(1rem, 2vw, 1.18rem);
  color: rgba(255,255,255,0.88); margin-bottom: 36px; line-height: 1.6;
}
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ── BOTONES ── */
.btn-primary {
  background: var(--blue); color: #fff;
  padding: 14px 28px; border-radius: 10px;
  font-weight: 700; font-size: 1rem;
  text-decoration: none; border: none; cursor: pointer;
  transition: background .2s, transform .15s;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary:hover { background: var(--blue-light); transform: translateY(-1px); }
.btn-outline {
  color: var(--blue); background: transparent;
  padding: 11px 26px; border-radius: 10px;
  font-weight: 600; font-size: 0.95rem;
  text-decoration: none; border: 2px solid var(--blue); cursor: pointer;
  transition: background .2s, color .2s, transform .15s;
  display: inline-flex; align-items: center; gap: 6px;
}
.btn-outline:hover { background: var(--blue); color: #fff; transform: translateY(-1px); }
.btn-secondary {
  background: rgba(255,255,255,0.15); color: #fff;
  padding: 14px 28px; border-radius: 10px;
  font-weight: 700; font-size: 1rem;
  text-decoration: none; border: 2px solid rgba(255,255,255,0.6); cursor: pointer;
  transition: background .2s, transform .15s;
  display: inline-flex; align-items: center; gap: 8px;
  backdrop-filter: blur(4px);
}
.btn-secondary:hover { background: rgba(255,255,255,0.25); transform: translateY(-1px); }

/* ── PAGE HEADER (páginas internas) ── */
.page-header {
  background: linear-gradient(160deg, #0d1f3c 0%, #1a3a6b 60%, #2a5298 100%);
  padding: 70px 5% 60px;
  text-align: center;
}
.page-header h1 { font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 800; color: #fff; margin-bottom: 12px; }
.page-header p { font-size: 1.05rem; color: rgba(255,255,255,0.82); }

/* ── SECTIONS ── */
section { padding: 80px 5%; }
.section-title { text-align: center; margin-bottom: 12px; }
.section-title h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800; color: var(--dark); }
.section-subtitle { text-align: center; color: var(--muted); font-size: 1rem; margin-bottom: 52px; }

/* ── SERVICIOS ── */
#servicios { background: var(--bg); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px; max-width: 1100px; margin: 0 auto;
}
.service-card {
  background: var(--card); border-radius: var(--radius);
  padding: 32px 28px; box-shadow: var(--shadow);
  transition: box-shadow .2s, transform .2s;
}
.service-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.service-icon {
  width: 52px; height: 52px; border-radius: 12px;
  background: var(--blue); display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.service-icon svg { width: 26px; height: 26px; stroke: #fff; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.service-card h3 { font-size: 1.08rem; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.service-card p { font-size: 0.92rem; color: var(--muted); line-height: 1.6; }

/* ── GALERÍA PÚBLICA ── */
.galeria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px; max-width: 1200px; margin: 0 auto;
}
.galeria-item {
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); background: var(--card);
  transition: transform .2s, box-shadow .2s;
}
.galeria-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.galeria-item img {
  width: 100%; height: 220px; object-fit: cover; display: block;
}
.galeria-item-info { padding: 16px 18px; }
.galeria-item-info h3 { font-size: 0.95rem; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
.galeria-item-info p { font-size: 0.85rem; color: var(--muted); }

/* ── PRODUCTOS PÚBLICO ── */
.productos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px; max-width: 1200px; margin: 0 auto;
}
.producto-card {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
  transition: transform .2s, box-shadow .2s;
  display: flex; flex-direction: column;
}
.producto-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.producto-card-img {
  width: 100%; height: 200px; object-fit: cover; background: var(--bg);
  display: flex; align-items: center; justify-content: center;
}
.producto-card-img img { width: 100%; height: 100%; object-fit: cover; }
.producto-card-img .sin-imagen {
  color: #bbb; font-size: 0.85rem; text-align: center; padding: 20px;
}
.producto-card-img svg { width: 48px; height: 48px; stroke: #ccc; fill: none; }
.producto-card-body { padding: 22px 24px; flex: 1; display: flex; flex-direction: column; }
.producto-sku { font-size: 0.75rem; font-weight: 600; color: var(--blue-light); letter-spacing: 0.05em; margin-bottom: 6px; }
.producto-nombre { font-size: 1.1rem; font-weight: 800; color: var(--dark); margin-bottom: 8px; }
.producto-desc { font-size: 0.88rem; color: var(--muted); line-height: 1.6; margin-bottom: 14px; flex: 1; }
.producto-caract { list-style: none; margin-bottom: 18px; }
.producto-caract li {
  font-size: 0.84rem; color: var(--text); padding: 4px 0;
  display: flex; align-items: center; gap: 8px;
}
.producto-caract li::before { content: '✓'; color: var(--blue); font-weight: 700; }
.producto-precio {
  display: flex; align-items: baseline; gap: 6px;
  border-top: 1px solid #eee; padding-top: 14px; margin-top: auto;
}
.precio-valor { font-size: 1.4rem; font-weight: 800; color: var(--blue); }
.precio-iva { font-size: 0.82rem; color: var(--muted); font-weight: 500; }
.btn-cotizar {
  margin-top: 14px; width: 100%;
  background: var(--blue); color: #fff;
  border: none; border-radius: 8px;
  padding: 12px; font-size: 0.92rem; font-weight: 700;
  cursor: pointer; font-family: inherit;
  transition: background .2s;
  text-align: center; text-decoration: none; display: block;
}
.btn-cotizar:hover { background: var(--blue-light); }

/* ── NOSOTROS ── */
#nosotros { background: #fff; }
.nosotros-inner { max-width: 900px; margin: 0 auto; }
.nosotros-desc { text-align: center; color: var(--muted); font-size: 1rem; line-height: 1.7; margin-bottom: 44px; }
.features-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 16px; max-width: 700px; margin: 0 auto;
}
.feature-item {
  display: flex; align-items: flex-start; gap: 14px;
  background: var(--bg); border-radius: 12px; padding: 20px 22px;
}
.feature-check {
  width: 26px; height: 26px; border-radius: 50%;
  border: 2px solid var(--blue); display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 1px;
}
.feature-check svg { width: 14px; height: 14px; stroke: var(--blue); fill: none; stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.feature-item p { font-size: 0.94rem; color: var(--text); font-weight: 500; line-height: 1.4; }

/* ── CONTACTO ── */
#contacto { background: var(--bg); }
.form-wrap { max-width: 700px; margin: 0 auto; background: #fff; border-radius: var(--radius); padding: 44px 40px; box-shadow: 0 4px 24px rgba(0,0,0,0.07); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 0.88rem; font-weight: 600; color: var(--dark); }
.form-group input, .form-group select, .form-group textarea {
  border: 1.5px solid #e0e0e0; border-radius: 9px;
  padding: 12px 15px; font-size: 0.95rem; font-family: inherit;
  color: var(--text); background: #fafafa; transition: border-color .2s; outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--blue); background: #fff; }
.form-group textarea { resize: vertical; min-height: 120px; }
.btn-submit {
  width: 100%; margin-top: 8px;
  background: linear-gradient(135deg, #1a3a6b, #2a5298);
  color: #fff; border: none; border-radius: 10px;
  padding: 15px; font-size: 1rem; font-weight: 700;
  cursor: pointer; font-family: inherit;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  transition: opacity .2s, transform .15s;
}
.btn-submit:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-submit svg { width: 18px; height: 18px; stroke: #fff; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.form-success { display: none; text-align: center; padding: 32px 0; }
.form-success .check-big { font-size: 3rem; margin-bottom: 12px; }
.form-success h3 { color: var(--blue); font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
.form-success p { color: var(--muted); }

/* ── FOOTER ── */
footer { background: #0d1f3c; color: #ccc; padding: 56px 5% 28px; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px; max-width: 1000px; margin: 0 auto 40px;
}
.footer-brand { display: flex; flex-direction: column; gap: 14px; }
.footer-logo-link { display: flex; align-items: center; gap: 10px; text-decoration: none; color: #fff; font-weight: 800; font-size: 1.15rem; }
.footer-brand p { font-size: 0.88rem; color: #9ca3af; line-height: 1.6; }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li { font-size: 0.88rem; color: #9ca3af; }
.footer-col ul li a { color: #9ca3af; text-decoration: none; transition: color .2s; }
.footer-col ul li a:hover { color: #fff; }
.contact-item { display: flex; align-items: center; gap: 10px; font-size: 0.88rem; color: #9ca3af; }
.contact-item svg { width: 16px; height: 16px; stroke: #6b9bd2; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.footer-bottom { border-top: 1px solid #1f2937; padding-top: 22px; text-align: center; font-size: 0.82rem; color: #6b7280; max-width: 1000px; margin: 0 auto; }

/* ── WHATSAPP ── */
.wa-bubble {
  position: fixed; bottom: 28px; right: 28px; z-index: 200;
  width: 56px; height: 56px; border-radius: 50%;
  background: #25d366; box-shadow: 0 4px 16px rgba(37,211,102,0.45);
  display: flex; align-items: center; justify-content: center;
  text-decoration: none; transition: transform .2s, box-shadow .2s;
}
.wa-bubble:hover { transform: scale(1.08); box-shadow: 0 6px 22px rgba(37,211,102,0.55); }
.wa-bubble svg { width: 30px; height: 30px; fill: #fff; }

/* ── TOAST ── */
.toast {
  position: fixed; bottom: 96px; right: 28px; z-index: 300;
  background: var(--blue); color: #fff;
  padding: 14px 22px; border-radius: 10px;
  font-size: 0.9rem; font-weight: 600;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  transform: translateY(20px); opacity: 0;
  transition: all .3s; pointer-events: none;
}
.toast.show { transform: translateY(0); opacity: 1; }

/* ── ADMIN ── */
.admin-body { background: #f0f2f5; min-height: 100vh; }
.admin-nav {
  background: var(--blue-dark); color: #fff;
  padding: 0 24px; height: 60px;
  display: flex; align-items: center; justify-content: space-between;
}
.admin-nav-brand { font-weight: 800; font-size: 1.1rem; color: #fff; text-decoration: none; }
.admin-nav-links { display: flex; gap: 8px; align-items: center; }
.admin-nav-links a {
  color: rgba(255,255,255,0.75); text-decoration: none;
  padding: 6px 14px; border-radius: 6px; font-size: 0.88rem;
  transition: background .2s, color .2s;
}
.admin-nav-links a:hover, .admin-nav-links a.active { background: rgba(255,255,255,0.12); color: #fff; }
.admin-nav-links a.logout { color: #f87171; }
.admin-container { max-width: 1100px; margin: 32px auto; padding: 0 20px; }
.admin-card {
  background: #fff; border-radius: 12px;
  box-shadow: 0 1px 8px rgba(0,0,0,0.08);
  padding: 28px 32px; margin-bottom: 24px;
}
.admin-card h2 { font-size: 1.2rem; font-weight: 700; color: var(--dark); margin-bottom: 20px; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th {
  text-align: left; padding: 10px 14px;
  font-size: 0.82rem; font-weight: 600; color: var(--muted);
  border-bottom: 2px solid #eee; text-transform: uppercase; letter-spacing: 0.04em;
}
.admin-table td { padding: 12px 14px; border-bottom: 1px solid #f0f0f0; font-size: 0.9rem; vertical-align: middle; }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table img { width: 60px; height: 50px; object-fit: cover; border-radius: 6px; }
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-green { background: #dcfce7; color: #166534; }
.badge-gray { background: #f1f5f9; color: #64748b; }
.btn-sm {
  padding: 5px 12px; border-radius: 6px; font-size: 0.8rem; font-weight: 600;
  border: none; cursor: pointer; text-decoration: none; display: inline-block;
  transition: opacity .2s;
}
.btn-sm:hover { opacity: 0.82; }
.btn-edit { background: #dbeafe; color: #1d4ed8; }
.btn-delete { background: #fee2e2; color: #b91c1c; }
.btn-add { background: var(--blue); color: #fff; padding: 9px 20px; border-radius: 8px; font-size: 0.88rem; font-weight: 600; border: none; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; transition: background .2s; }
.btn-add:hover { background: var(--blue-light); }
.admin-form label { display: block; font-size: 0.88rem; font-weight: 600; color: var(--dark); margin-bottom: 6px; }
.admin-form input[type=text], .admin-form input[type=number], .admin-form input[type=password],
.admin-form textarea, .admin-form select {
  width: 100%; padding: 10px 14px; border: 1.5px solid #e0e0e0;
  border-radius: 8px; font-size: 0.95rem; font-family: inherit;
  background: #fafafa; outline: none; transition: border-color .2s;
  margin-bottom: 16px;
}
.admin-form input:focus, .admin-form textarea:focus, .admin-form select:focus { border-color: var(--blue); background: #fff; }
.admin-form textarea { min-height: 100px; resize: vertical; }
.admin-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.admin-form-row { margin-bottom: 16px; }
.admin-form input[type=checkbox] { width: auto; margin-right: 8px; }
.admin-alert { padding: 12px 18px; border-radius: 8px; margin-bottom: 20px; font-size: 0.9rem; font-weight: 500; }
.admin-alert-ok { background: #dcfce7; color: #166534; }
.admin-alert-err { background: #fee2e2; color: #b91c1c; }
.preview-img { width: 100px; height: 80px; object-fit: cover; border-radius: 8px; border: 1px solid #eee; margin-top: 6px; }

/* ── LIGHTBOX ── */
.lightbox { display: none; position: fixed; inset: 0; z-index: 1000; background: rgba(0,0,0,0.88); align-items: center; justify-content: center; }
.lightbox.open { display: flex; }
.lightbox img { max-width: 90vw; max-height: 88vh; border-radius: 8px; box-shadow: 0 8px 40px rgba(0,0,0,0.5); }
.lightbox-close { position: absolute; top: 20px; right: 28px; color: #fff; font-size: 2rem; cursor: pointer; background: none; border: none; line-height: 1; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .form-grid { grid-template-columns: 1fr; }
  .form-wrap { padding: 28px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .features-grid { grid-template-columns: 1fr; }
  section { padding: 60px 5%; }
  .admin-form-grid { grid-template-columns: 1fr; }
  .admin-table { font-size: 0.82rem; }
}