/* ===================================
   INSONO HOGAR - Insonorización para el Hogar
   CSS3 - Mobile First - Minimalista
   =================================== */

/* Reset y Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #1a3a4a;
    --color-secondary: #2d6a7a;
    --color-accent: #4ecdc4;
    --color-warm: #f39c12;
    --color-bg: #f8fafb;
    --color-white: #ffffff;
    --color-text: #2c3e50;
    --color-text-light: #5a6c7d;
    --color-border: #e1e8ed;
    --color-card-shadow: rgba(26, 58, 74, 0.08);
    --font-main: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --max-width: 1200px;
    --content-width: 780px;
    --radius: 8px;
    --transition: 0.3s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-accent);
}

/* Header */
.site-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 4px var(--color-card-shadow);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

.site-logo span {
    color: var(--color-accent);
}

.nav-toggle {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    margin: 5px 0;
    transition: var(--transition);
}

.main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem;
}

.main-nav.active {
    display: block;
}

.main-nav ul {
    list-style: none;
}

.main-nav li {
    margin-bottom: 0.75rem;
}

.main-nav a {
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.4rem 0;
    display: block;
}

.main-nav a:hover {
    color: var(--color-accent);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    padding: 3rem 1.5rem;
    text-align: center;
}

.hero h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.hero p {
    font-size: 1.05rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 1.5rem;
    line-height: 1.6;
}

.hero-cta {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-primary);
    padding: 0.75rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: transform var(--transition), box-shadow var(--transition);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(78, 205, 196, 0.4);
    color: var(--color-primary);
}

/* Articles Grid */
.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.articles-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.article-card {
    background: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 2px 8px var(--color-card-shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.article-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26, 58, 74, 0.12);
}

.card-image {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.card-image::after {
    content: attr(data-icon);
    font-size: 3rem;
    opacity: 0.3;
}

.card-category {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    background: var(--color-accent);
    color: var(--color-primary);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-body {
    padding: 1.25rem;
}

.card-body h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.6rem;
    line-height: 1.4;
}

.card-body p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.card-link {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-secondary);
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 2px;
}

.card-link:hover {
    color: var(--color-accent);
}

/* Single Article Layout */
.article-layout {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.article-content {
    max-width: var(--content-width);
}

.article-breadcrumb {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

.article-breadcrumb a {
    color: var(--color-text-light);
}

.article-breadcrumb a:hover {
    color: var(--color-accent);
}

.article-content h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.3;
    margin-bottom: 1rem;
}

.article-meta {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.article-content h2 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-top: 0.5rem;
}

.article-content h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-secondary);
    margin-top: 1.8rem;
    margin-bottom: 0.75rem;
}

.article-content p {
    margin-bottom: 1.2rem;
    font-size: 1.02rem;
    line-height: 1.8;
}

.article-content ul,
.article-content ol {
    margin-bottom: 1.2rem;
    padding-left: 1.5rem;
}

.article-content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.article-content strong {
    color: var(--color-primary);
}

.article-content blockquote {
    border-left: 4px solid var(--color-accent);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: rgba(78, 205, 196, 0.05);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style: italic;
    color: var(--color-text-light);
}

/* Ad Placeholders */
.ad-block {
    background: #f0f2f5;
    border: 2px dashed #ccd1d9;
    border-radius: var(--radius);
    padding: 2rem 1rem;
    text-align: center;
    margin: 2rem 0;
    color: #8b95a2;
    font-size: 0.8rem;
    font-weight: 500;
}

.ad-block-sidebar {
    background: #f0f2f5;
    border: 2px dashed #ccd1d9;
    border-radius: var(--radius);
    padding: 3rem 1rem;
    text-align: center;
    margin-bottom: 1.5rem;
    color: #8b95a2;
    font-size: 0.8rem;
}

/* Sidebar */
.article-sidebar {
    display: none;
}

.sidebar-widget {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px var(--color-card-shadow);
}

.sidebar-widget h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent);
}

.sidebar-widget ul {
    list-style: none;
}

.sidebar-widget li {
    margin-bottom: 0.75rem;
}

.sidebar-widget li a {
    font-size: 0.88rem;
    color: var(--color-text);
    display: block;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-widget li:last-child a {
    border-bottom: none;
}

.sidebar-widget li a:hover {
    color: var(--color-accent);
    padding-left: 5px;
}

/* Info Box */
.info-box {
    background: linear-gradient(135deg, rgba(78, 205, 196, 0.08), rgba(45, 106, 122, 0.05));
    border: 1px solid rgba(78, 205, 196, 0.3);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.info-box h4 {
    color: var(--color-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.info-box p {
    font-size: 0.92rem;
    margin-bottom: 0;
}

/* Table */
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
    overflow-x: auto;
    display: block;
}

.article-content th,
.article-content td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.article-content th {
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
    font-size: 0.85rem;
}

.article-content tr:hover td {
    background: rgba(78, 205, 196, 0.05);
}

/* Footer */
.site-footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
    padding: 2rem 1.5rem;
    margin-top: 3rem;
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    margin: 0 1rem;
    font-size: 0.85rem;
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-copy {
    font-size: 0.8rem;
    opacity: 0.6;
}

/* Back to top / Navigation */
.back-home {
    display: inline-block;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-secondary);
}

/* Filter Bar */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding: 0 1.5rem;
}

.filter-btn {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-text-light);
    cursor: pointer;
    transition: all var(--transition);
}

.filter-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-secondary);
}

.filter-btn.active {
    background: var(--color-accent);
    color: var(--color-primary);
    border-color: var(--color-accent);
    font-weight: 600;
}

/* Search */
.search-wrapper {
    position: relative;
    flex: 1;
    max-width: 280px;
    margin: 0 1rem;
    display: none;
}

.search-input {
    width: 100%;
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.85rem;
    outline: none;
    transition: border-color var(--transition);
}

.search-input:focus {
    border-color: var(--color-accent);
}

.search-results {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-top: 0.5rem;
    box-shadow: 0 8px 25px var(--color-card-shadow);
    z-index: 200;
    max-height: 300px;
    overflow-y: auto;
}

.search-result-item {
    display: block;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.85rem;
    color: var(--color-text);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background: rgba(78, 205, 196, 0.05);
}

.search-result-cat {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-primary);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    margin-right: 0.5rem;
    text-transform: uppercase;
}

.search-no-results {
    padding: 1rem;
    color: var(--color-text-light);
    font-size: 0.85rem;
    text-align: center;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 90;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-accent);
    color: var(--color-primary);
    transform: translateY(-3px);
}

/* Cookie Banner */
.cookie-banner {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-primary);
    color: rgba(255,255,255,0.9);
    padding: 1rem 1.5rem;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    z-index: 1000;
    font-size: 0.85rem;
    flex-wrap: wrap;
    text-align: center;
}

.cookie-banner p {
    margin: 0;
}

.cookie-accept {
    background: var(--color-accent);
    color: var(--color-primary);
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: transform var(--transition);
}

.cookie-accept:hover {
    transform: scale(1.05);
}

/* Reading Progress */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--color-accent);
    z-index: 1001;
    width: 0;
    transition: width 0.1s linear;
}

/* ===================================
   RESPONSIVE - Tablet (768px+)
   =================================== */
@media (min-width: 768px) {
    .hero h1 {
        font-size: 2.4rem;
    }

    .hero {
        padding: 4rem 2rem;
    }

    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .nav-toggle {
        display: none;
    }

    .search-wrapper {
        display: block;
    }

    .main-nav {
        display: block;
        position: static;
        background: none;
        border: none;
        padding: 0;
    }

    .main-nav ul {
        display: flex;
        gap: 1.5rem;
    }

    .main-nav li {
        margin-bottom: 0;
    }

    .article-layout {
        grid-template-columns: 1fr 280px;
        gap: 3rem;
    }

    .article-sidebar {
        display: block;
        position: sticky;
        top: 80px;
        align-self: start;
    }
}

/* ===================================
   RESPONSIVE - Desktop (1024px+)
   =================================== */
@media (min-width: 1024px) {
    .hero h1 {
        font-size: 2.8rem;
    }

    .articles-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .article-layout {
        grid-template-columns: 1fr 320px;
        padding: 2.5rem 2rem;
    }

    .article-content h1 {
        font-size: 2.2rem;
    }
}

/* ===================================
   LEGAL PAGES
   =================================== */
.legal-page {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.legal-page h1 {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.legal-updated {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 2rem;
}

.legal-page h2 {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.legal-page h3 {
    font-size: 1.05rem;
    color: var(--color-secondary);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.legal-page p,
.legal-page li {
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.legal-page ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.legal-page table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.88rem;
}

.legal-page th,
.legal-page td {
    padding: 0.6rem 0.8rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.legal-page th {
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
}

/* ===================================
   CONTACT FORM
   =================================== */
.contact-form {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 2rem;
    margin: 1.5rem 0;
    box-shadow: 0 2px 8px var(--color-card-shadow);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: var(--font-main);
    transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.form-checkbox input {
    width: auto;
    margin-top: 0.2rem;
}

.form-checkbox label {
    font-weight: 400;
    font-size: 0.85rem;
}

.form-submit {
    background: var(--color-accent);
    color: var(--color-primary);
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(78, 205, 196, 0.3);
}

.form-success {
    margin-top: 1.5rem;
    padding: 1rem 1.5rem;
    background: rgba(78, 205, 196, 0.1);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius);
    color: var(--color-secondary);
    font-weight: 500;
}

.contact-info {
    margin-top: 2rem;
}

.contact-info h2 {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}