/* === GOOGLE FONTS === */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&family=Roboto:wght@400;500&display=swap');

/* === VARIABLES CSS === */
:root {
  --primary-color: #A91D3A;
  --primary-color-dark: #8A142B;
  --accent-color: #BDBDBD;
  --text-color: #212121;
  --background-color: #F5F7FA;
  --surface-color: #FFFFFF;
  --text-color-light: #6c757d;
  --border-color: #dee2e6;
  --error-color: #D32F2F;
  --success-color: #4CAF50;
  --warning-color: #FFC107;
  --font-family-headings: 'Poppins', sans-serif;
  --font-family-body: 'Roboto', sans-serif;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --border-radius: 8px;
  --header-height: 70px;
}

/* === RESET Y ESTILOS GENERALES === */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-family-body); background-color: var(--background-color); color: var(--text-color); line-height: 1.6; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-family-headings); color: var(--text-color); font-weight: 600; margin-bottom: 0.75rem; }
h1 { color: var(--primary-color); }
p { margin-bottom: 1rem; }
a { text-decoration: none; color: var(--primary-color); transition: color 0.3s ease; }
a:hover { color: var(--primary-color-dark); }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1100px; margin: 0 auto; padding: 3rem 1rem; }

/* === HEADER Y NAVEGACIÓN === */
.header { position: fixed; top: 0; left: 0; width: 100%; height: var(--header-height); background-color: var(--surface-color); box-shadow: var(--box-shadow); display: flex; justify-content: center; z-index: 1000; }
.nav-container { display: flex; justify-content: space-between; align-items: center; width: 100%; max-width: 1100px; padding: 0 1rem; height: 100%; }
.logo { font-family: var(--font-family-headings); font-weight: 700; font-size: 1.5rem; color: var(--text-color); text-decoration: none; }
.logo span { color: var(--primary-color); }
.nav-links { display: flex; list-style: none; gap: 2rem; }
.nav-links a { font-family: var(--font-family-headings); font-weight: 500; color: var(--text-color); position: relative; padding: 5px 0; }
.nav-links a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background-color: var(--primary-color); transition: width 0.3s ease; }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-toggle { display: none; font-size: 1.8rem; cursor: pointer; color: var(--text-color); }

/* === SECCIÓN HERO (PÁGINA DE INICIO) === */
.hero-section { background-color: var(--surface-color); }
.hero-container { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 3rem; min-height: calc(100vh - var(--header-height)); padding-top: 2rem; padding-bottom: 2rem; }
.hero-text .subtitle { display: block; font-family: var(--font-family-headings); font-weight: 600; color: var(--primary-color); margin-bottom: 0.5rem; }
.hero-text h1 { font-size: 3.2rem; line-height: 1.2; margin-bottom: 1.5rem; }
.hero-text p { font-size: 1.1rem; color: var(--text-color-light); margin-bottom: 2rem; }
.hero-image { text-align: center; }
.hero-image img { max-width: 100%; height: auto; border-radius: var(--border-radius); }

/* === MAIN CONTENT & SECCIONES === */
main { padding-top: var(--header-height); }
.section-heading { text-align: center; margin-bottom: 3rem; }
.section-heading h2 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.divider { width: 80px; height: 4px; background-color: var(--primary-color); margin: 0 auto 1rem; border-radius: 2px; }
.keyword { font-weight: 600; color: var(--primary-color); }

/* === PÁGINA DE LOGIN === */
.login-page-body { display: flex; justify-content: center; align-items: center; min-height: 100vh; background-color: #f3f4f6; }
.login-container { width: 100%; max-width: 420px; padding: 2rem; }
.login-box { background-color: var(--surface-color); padding: 2.5rem; border-radius: var(--border-radius); box-shadow: 0 10px 25px rgba(0,0,0,0.1); text-align: center; }
.login-logo { margin-bottom: 1.5rem; }
.login-logo a { font-family: var(--font-family-headings); font-weight: 700; font-size: 1.8rem; color: var(--text-color); }
.login-logo span { color: var(--primary-color); }
.login-box h2 { font-size: 1.5rem; margin-bottom: 2rem; color: var(--text-color-light); }
.form-group label { display: flex; align-items: center; gap: 0.5rem; font-weight: 500; margin-bottom: 0.5rem; color: var(--text-color); text-align: left; }
.form-group input { width: 100%; padding: 12px; border: 1px solid var(--border-color); border-radius: var(--border-radius); font-size: 1rem; }
.form-group input:focus { border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(169, 29, 58, 0.1); outline: none; }
#loginForm .btn-submit { width: 100%; margin-top: 1rem; }
.error-message { background-color: rgba(211, 47, 47, 0.1); color: var(--error-color); border: 1px solid rgba(211, 47, 47, 0.2); padding: 10px; border-radius: var(--border-radius); margin-top: 1rem; font-size: 0.9rem; }
.back-to-home { margin-top: 2rem; }
.back-to-home a { color: var(--text-color-light); text-decoration: none; font-size: 0.9rem; transition: color 0.3s; }
.back-to-home a:hover { color: var(--primary-color); }
.back-to-home i { margin-right: 0.5rem; }

/* === PÁGINA 'CÓMO FUNCIONA' (ESPECIFICACIONES) === */
.comparison-section { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-bottom: 4rem; }
.tech-card { background-color: var(--surface-color); padding: 2rem; border-radius: var(--border-radius); box-shadow: var(--box-shadow); border-top: 5px solid; }
.tech-card.dtf { border-color: #3498db; }
.tech-card.sublimation { border-color: #e74c3c; }
.tech-card-header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; }
.tech-card-header i { font-size: 2rem; }
.tech-card.dtf .tech-card-header i { color: #3498db; }
.tech-card.sublimation .tech-card-header i { color: #e74c3c; }
.tech-card-header h3 { font-size: 1.5rem; margin-bottom: 0; }
.tech-card-description { margin-bottom: 1.5rem; }
.tech-list { list-style: none; padding: 0; }
.tech-list li { display: flex; align-items: flex-start; gap: 0.75rem; margin-bottom: 0.75rem; }
.tech-list i { color: var(--success-color); margin-top: 5px; }
.file-reqs-section { background-color: var(--surface-color); padding: 3rem 0; margin-bottom: 4rem; }
.reqs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; max-width: 1000px; margin: 0 auto; text-align: center; }
.req-item i { font-size: 3rem; color: var(--primary-color); margin-bottom: 1rem; }
.req-item h4 { font-size: 1.2rem; margin-bottom: 0.5rem; }

/* === FORMULARIO DE COTIZACIÓN === */
.form-layout { display: grid; grid-template-columns: 2fr 1fr; gap: 2.5rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.form-column { display: flex; flex-direction: column; gap: 1.5rem; }
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-weight: 500; margin-bottom: 0.5rem; color: var(--text-color); }
.form-group input[type="text"], .form-group input[type="email"], .form-group input[type="tel"], .form-group input[type="number"], .form-group input[type="date"], .form-group textarea {
    width: 100%; padding: 12px; border: 1px solid var(--border-color); border-radius: var(--border-radius); font-size: 1rem; font-family: var(--font-family-body); transition: border-color 0.3s, box-shadow 0.3s;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(169, 29, 58, 0.1); outline: none; }
.file-upload input[type="file"] { display: none; }
.file-upload-label { display: inline-flex; align-items: center; gap: 0.75rem; padding: 12px 20px; background-color: #f0f0f0; border: 1px dashed var(--border-color); border-radius: var(--border-radius); cursor: pointer; transition: background-color 0.3s; }
.file-upload-label:hover { background-color: #e9e9e9; }
.file-upload-label i { font-size: 1.2rem; color: var(--primary-color); }
.file-name { margin-left: 1rem; font-style: italic; color: var(--text-color-light); }
.form-actions { text-align: center; margin-top: 2rem; }
.btn-submit { background-color: var(--primary-color); color: #fff; border: none; padding: 15px 30px; font-size: 1.1rem; font-family: var(--font-family-headings); border-radius: var(--border-radius); cursor: pointer; transition: background-color 0.3s, transform 0.2s; }
.btn-submit:hover { background-color: var(--primary-color-dark); transform: translateY(-2px); }
.btn-submit:disabled { background-color: var(--accent-color); cursor: not-allowed; }

/* === PÁGINA "ACERCA DE" === */
.about-section { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 3rem; }
.about-image img { border-radius: var(--border-radius); box-shadow: var(--box-shadow); }
.values-list { list-style: none; margin-top: 2rem; }
.values-list li { display: flex; align-items: flex-start; margin-bottom: 1rem; }
.values-list i { color: var(--success-color); font-size: 1.2rem; margin-right: 1rem; margin-top: 4px; }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; text-align: center; }
.feature-item i { font-size: 2.5rem; color: var(--primary-color); margin-bottom: 1rem; }
.feature-item h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }

/* === GALERÍA DE DISEÑOS (MODAL CORREGIDO) === */
.filter-buttons { display: flex; justify-content: center; flex-wrap: wrap; gap: 1rem; margin-bottom: 3rem; }
.filter-btn { background: none; border: 1px solid var(--border-color); border-radius: 20px; padding: 8px 20px; font-family: var(--font-family-headings); font-weight: 500; cursor: pointer; transition: all 0.3s ease; }
.filter-btn:hover { background-color: var(--primary-color-dark); color: #fff; border-color: var(--primary-color-dark); }
.filter-btn.active { background-color: var(--primary-color); color: #fff; border-color: var(--primary-color); }
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.design-card { background-color: var(--surface-color); border-radius: var(--border-radius); box-shadow: var(--box-shadow); overflow: hidden; cursor: pointer; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.design-card:hover { transform: translateY(-5px); box-shadow: 0 8px 20px rgba(0,0,0,0.12); }
.card-image { width: 100%; height: 250px; object-fit: cover; }
.card-info { padding: 1.5rem; }
.card-info h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.card-info p { font-size: 0.9rem; color: var(--text-color-light); }

/* === MODAL LIGHTBOX PARA GALERÍA === */
.modal-lightbox { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.85); display: none; justify-content: center; align-items: center; z-index: 2000; padding: 1rem; opacity: 0; transition: opacity 0.3s ease; }
.modal-lightbox.active { display: flex; opacity: 1; }
.modal-lightbox-content { position: relative; background-color: var(--surface-color); max-width: 600px; width: 100%; max-height: 90vh; border-radius: var(--border-radius); box-shadow: 0 10px 30px rgba(0,0,0,0.3); display: flex; flex-direction: column; overflow: hidden; }
.modal-image-container { overflow-y: auto; }
.modal-lightbox-content img { width: 100%; height: auto; display: block; }
.modal-info { padding: 1.5rem 2rem; text-align: center; border-top: 1px solid var(--border-color); }
.modal-info h3 { font-size: 1.5rem; margin-bottom: 1rem; color: var(--text-color); }
.modal-whatsapp-btn { display: inline-flex; align-items: center; gap: 0.75rem; background-color: #25D366; color: #fff !important; padding: 12px 25px; border-radius: var(--border-radius); font-family: var(--font-family-headings); font-weight: 500; font-size: 1rem; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; }
.modal-whatsapp-btn:hover { background-color: #1EBE57; transform: translateY(-2px); }
.modal-whatsapp-btn i { font-size: 1.3rem; }
.modal-close-btn { position: absolute; top: 10px; right: 10px; font-size: 1.5rem; color: #fff; background-color: rgba(0, 0, 0, 0.5); border-radius: 50%; width: 35px; height: 35px; display: flex; justify-content: center; align-items: center; cursor: pointer; transition: background-color 0.3s ease; z-index: 10; }
.modal-close-btn:hover { background-color: rgba(0, 0, 0, 0.8); }

/* === PANEL DE ADMINISTRACIÓN === */
.admin-grid-container { display: grid; grid-template-columns: 260px 1fr; min-height: calc(100vh - var(--header-height)); }
.admin-sidebar { background-color: var(--surface-color); box-shadow: var(--box-shadow); display: flex; flex-direction: column; padding: 1.5rem; border-right: 1px solid var(--border-color); }
.sidebar-header h3 { font-size: 1.5rem; text-align: center; margin-bottom: 2rem; color: var(--primary-color); }
.sidebar-nav ul { list-style: none; }
.sidebar-nav li a { display: flex; align-items: center; gap: 1rem; padding: 1rem; margin-bottom: 0.5rem; border-radius: var(--border-radius); color: var(--text-color-light); font-weight: 500; transition: background-color 0.3s, color 0.3s; }
.sidebar-nav li a:hover { background-color: var(--background-color); color: var(--primary-color); }
.sidebar-nav li.active a { background-color: var(--primary-color); color: #fff; }
.sidebar-footer { margin-top: auto; padding-top: 1.5rem; border-top: 1px solid var(--border-color); }
.logout-btn { display: flex; align-items: center; justify-content: center; gap: 1rem; width: 100%; padding: 1rem; border-radius: var(--border-radius); background-color: transparent; border: 1px solid var(--error-color); color: var(--error-color); font-weight: 500; text-align: center; transition: background-color 0.3s, color 0.3s; }
.logout-btn:hover { background-color: var(--error-color); color: #fff; }
.admin-main-content { padding: 2rem 3rem; }
.dashboard-cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; }
.admin-card { background-color: var(--surface-color); padding: 1.5rem; border-radius: var(--border-radius); box-shadow: var(--box-shadow); display: flex; align-items: center; gap: 1.5rem; transition: transform 0.3s, box-shadow 0.3s; }
.admin-card:hover { transform: translateY(-5px); box-shadow: 0 8px 20px rgba(0,0,0,0.1); }
.admin-card .card-icon { font-size: 2.5rem; color: var(--primary-color); }
.admin-card .card-content h4 { font-size: 1rem; color: var(--text-color-light); margin-bottom: 0.25rem; }
.admin-card .card-content p { font-size: 1.5rem; font-weight: 600; margin-bottom: 0; }

/* === PÁGINA DE INVENTARIO === */
.inventory-controls { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; gap: 1rem; }
.search-input { width: 100%; max-width: 400px; padding: 12px; border: 1px solid var(--border-color); border-radius: var(--border-radius); font-size: 1rem; }
.inventory-table-container { overflow-x: auto; background-color: var(--surface-color); border-radius: var(--border-radius); box-shadow: var(--box-shadow); }
.inventory-table { width: 100%; border-collapse: collapse; }
.inventory-table th, .inventory-table td { padding: 1rem 1.25rem; text-align: left; border-bottom: 1px solid var(--border-color); }
.inventory-table thead th { background-color: var(--background-color); font-family: var(--font-family-headings); font-weight: 600; color: var(--text-color); }
.inventory-table tbody tr:last-child td { border-bottom: none; }
.inventory-table tbody tr:hover { background-color: #f9f9f9; }
.inventory-table .stock-low { color: var(--error-color); font-weight: 600; }
.inventory-table .stock-ok { color: var(--success-color); }
.table-actions { display: flex; gap: 0.75rem; }
.btn-edit, .btn-delete { background: none; border: none; cursor: pointer; font-size: 1.1rem; padding: 5px; border-radius: 50%; transition: background-color 0.3s; }
.btn-edit { color: var(--primary-color); }
.btn-edit:hover { background-color: rgba(169, 29, 58, 0.1); }
.btn-delete { color: var(--error-color); }
.btn-delete:hover { background-color: rgba(211, 47, 47, 0.1); }

/* === MODAL PARA INVENTARIO === */
.modal { display: none; position: fixed; z-index: 1001; left: 0; top: 0; width: 100%; height: 100%; overflow: auto; background-color: rgba(0,0,0,0.6); animation: fadeIn 0.3s ease-out; }
.modal.active { display: flex; justify-content: center; align-items: center; }
.modal-content { background-color: var(--surface-color); margin: auto; padding: 2rem; border-radius: var(--border-radius); width: 90%; max-width: 700px; box-shadow: 0 5px 20px rgba(0,0,0,0.2); animation: slideIn 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
.modal-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border-color); padding-bottom: 1rem; margin-bottom: 2rem; }
.modal-header h2 { margin: 0; font-size: 1.8rem; }
.close-btn { color: var(--text-color-light); font-size: 2rem; font-weight: bold; cursor: pointer; transition: color 0.3s; }
.close-btn:hover { color: var(--error-color); }
#productForm .form-actions { margin-top: 1rem; }

/* === FOOTER === */
.footer { background-color: #212121; color: #fff; text-align: center; padding: 2.5rem 1rem; margin-top: 3rem; }
.footer-content h2 { font-size: 2rem; font-weight: 700; margin-bottom: 0.5rem; color: #fff; }
.footer-content h2 span { color: var(--accent-color); }
.footer-content h5 { font-size: 1rem; font-weight: 400; margin-bottom: 1.5rem; color: #fff; opacity: 0.8; }
.social-networks { display: flex; justify-content: center; gap: 1.5rem; }
.social-networks a { color: #fff; font-size: 1.5rem; transition: transform 0.3s ease, color 0.3s ease; }
.social-networks a:hover { transform: translateY(-3px); color: var(--primary-color); }

/* === ANIMACIONES === */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideIn { from { transform: translateY(-50px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* === RESPONSIVE DESIGN === */
@media (max-width: 992px) { 
    .gallery-grid { grid-template-columns: repeat(2, 1fr); } 
    .form-layout, .comparison-section, .reqs-grid, .hero-container { grid-template-columns: 1fr; } 
    .hero-container { text-align: center; min-height: auto; padding-top: 4rem; padding-bottom: 4rem; } 
    .hero-text h1 { font-size: 2.5rem; } 
    .hero-image { order: -1; margin-bottom: 2rem; }
    .admin-grid-container { grid-template-columns: 1fr; }
    .admin-sidebar { position: fixed; left: -100%; top: var(--header-height); height: calc(100% - var(--header-height)); z-index: 999; transition: left 0.4s ease-in-out; background-color: var(--surface-color); }
    .admin-sidebar.active { left: 0; }
    .inventory-controls { flex-direction: column; align-items: stretch; }
}

@media (max-width: 768px) {
  .nav-links { position: fixed; top: var(--header-height); right: -100%; width: 60%; height: calc(100vh - var(--header-height)); background-color: var(--surface-color); flex-direction: column; align-items: center; padding-top: 2rem; gap: 1.5rem; transition: right 0.4s ease-in-out; box-shadow: -5px 0px 15px rgba(0,0,0,0.1); }
  .nav-links.active { right: 0; }
  .nav-toggle { display: block; }
  .about-section, .features-grid, .gallery-grid, .form-grid { grid-template-columns: 1fr; }
  .about-image { order: -1; }
  .form-sidebar { order: -1; }
  .hero-text h1 { font-size: 2rem; }
  .admin-main-content { padding: 2rem 1rem; }
  .modal-content { padding: 1.5rem; }
  .modal-header h2 { font-size: 1.5rem; }
}