/* ============================================================
   GUÍA EPM HOGAR — Estilos
   Paleta inspirada en verde EPM · Guía educativa informativa
   ============================================================ */

:root {
  /* Verde EPM — paleta visible */
  --epm-green: #00a651;
  --epm-green-dark: #008542;
  --epm-green-darker: #006b35;
  --epm-green-light: #d4edda;
  --epm-green-pale: #edf7f0;
  --epm-lime: #7ab800;

  --color-bg: #edf7f0;
  --color-bg-alt: #d4edda;
  --color-surface: #ffffff;
  --color-text: #1b3d2f;
  --color-text-secondary: #3d5c4a;
  --color-text-muted: #6b8f7a;
  --color-border: #a8d5b5;
  --color-border-light: #c8e6d0;

  --color-primary: var(--epm-green);
  --color-primary-dark: var(--epm-green-dark);
  --color-primary-darker: var(--epm-green-darker);
  --color-primary-light: var(--epm-green-pale);
  --color-primary-soft: var(--epm-green-light);
  --color-accent: var(--epm-lime);
  --color-teal: #0d9488;

  /* Energía — acento ámbar para contraste */
  --color-energy: #e6a817;
  --color-energy-dark: #b45309;
  --color-energy-light: #fef9ec;

  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Source Serif 4', Georgia, serif;

  --container-max: 880px;
  --container-wide: 1040px;
  --header-height: 64px;

  --shadow-sm: 0 1px 3px rgba(0, 122, 61, 0.06);
  --shadow-md: 0 4px 20px rgba(0, 122, 61, 0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --duration: 300ms;
  --duration-slow: 600ms;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

.sr-only,
.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 9999;
  width: auto;
  height: auto;
  padding: 8px 16px;
  clip: auto;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: 720px;
}

/* --- Aviso superior --- */
.top-notice {
  background: var(--epm-green-darker);
  border-bottom: none;
  padding: 10px 0;
}

.top-notice__inner p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.92);
  text-align: center;
  line-height: 1.5;
}

.top-notice strong {
  font-weight: 700;
  color: #fff;
}

/* --- Header estilo EPM: barra verde sólida --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--epm-green);
  border-bottom: none;
  box-shadow: 0 2px 12px rgba(0, 107, 53, 0.35);
  transition: box-shadow var(--duration) var(--ease);
}

.header.is-scrolled {
  box-shadow: 0 4px 20px rgba(0, 107, 53, 0.45);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.header__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.header__brand-accent {
  color: var(--epm-lime);
}

.header__nav {
  display: flex;
}

.header__list {
  display: flex;
  gap: 28px;
}

.header__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.88);
  transition: color var(--duration);
}

.header__link:hover {
  color: #ffffff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.header__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.header__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #ffffff;
  border-radius: 1px;
  transition: all var(--duration) var(--ease);
}

.header__toggle.is-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
  background: #ffffff;
}

.header__toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.header__toggle.is-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
  background: #ffffff;
}

/* --- Hero verde EPM --- */
.hero {
  position: relative;
  padding: 72px 0 56px;
  background: linear-gradient(135deg, var(--epm-green) 0%, var(--epm-green-dark) 55%, var(--epm-green-darker) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(122, 184, 0, 0.25) 0%, transparent 65%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--epm-lime);
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero__eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--epm-lime);
  margin-bottom: 16px;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  max-width: 680px;
  color: #ffffff;
}

.hero__title em {
  font-style: italic;
  color: var(--epm-lime);
}

.hero__lead {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
  max-width: 600px;
  margin-bottom: 16px;
}

.hero__updated {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 28px;
}

.info-box {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.95);
  border: none;
  border-left: 5px solid var(--epm-lime);
  border-radius: var(--radius-md);
  max-width: 640px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.info-box__icon {
  flex-shrink: 0;
  font-size: 1.125rem;
  color: var(--epm-green);
  line-height: 1.4;
}

.info-box p {
  font-size: 0.9375rem;
  color: var(--epm-green-darker);
  line-height: 1.6;
}

/* --- EPM services grid --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.service-card {
  padding: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  transition: box-shadow var(--duration) var(--ease);
}

.service-card:hover {
  box-shadow: var(--shadow-md);
}

.service-card__icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 10px;
}

.service-card__title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.service-card p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

.service-card--energy {
  border-top: 3px solid var(--color-energy);
}

.service-card--water {
  border-top: 3px solid var(--color-primary);
}

.service-card--sewer {
  border-top: 3px solid var(--color-teal);
}

.service-card--gas {
  border-top: 3px solid #64748b;
}

/* --- Energy theme accents --- */
.section-label--energy {
  color: var(--color-energy-dark);
}

.compare-card--energy {
  border-top: 3px solid var(--color-energy);
}

.compare-card--energy .compare-card__tag {
  color: var(--color-energy-dark);
  background: var(--color-energy-light);
}

.compare-card--water {
  border-top: 3px solid var(--color-primary);
}

.compare-card--water .compare-card__tag {
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
}

.tip-card--energy .tip-card__num {
  color: var(--color-energy-dark);
}

.tip-card--energy:hover {
  border-color: #fde68a;
}

.bill-item--energy {
  border-left-color: var(--color-energy);
}

.subsection-title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 28px 0 16px;
  color: var(--color-text);
}

.subsection-title:first-of-type {
  margin-top: 0;
}

/* --- Emergency blocks --- */
.emergency-blocks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.emergency-block {
  padding: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
}

.emergency-block__title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.emergency-block__steps {
  list-style: decimal;
  padding-left: 20px;
}

.emergency-block__steps li {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 10px;
  padding-left: 4px;
}

/* --- Sections --- */
.section {
  padding: 72px 0;
}

.section--alt {
  background: var(--epm-green-light);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--epm-green-dark);
  margin-bottom: 12px;
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 166, 81, 0.12);
  border-radius: 999px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  color: var(--epm-green-darker);
}

.section-text {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 640px;
}

/* --- Stats row --- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.stat-chip {
  padding: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-bottom: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  transition: box-shadow var(--duration) var(--ease);
}

.stat-chip:hover {
  box-shadow: var(--shadow-md);
}

.stat-chip strong {
  display: block;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--epm-green);
  margin-bottom: 4px;
}

.stat-chip span {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* --- Compare cards --- */
.compare-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.compare-card {
  padding: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}

.compare-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.compare-card__tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.compare-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.compare-card__text {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
}

.compare-card__list li {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding: 6px 0;
  padding-left: 16px;
  position: relative;
}

.compare-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 5px;
  height: 5px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* --- Tips grid --- */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tip-card {
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  transition: all var(--duration) var(--ease);
}

.tip-card:hover {
  border-color: var(--color-primary-soft);
  box-shadow: var(--shadow-md);
}

.tip-card__num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.tip-card__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.tip-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- Directory --- */
.directory-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.directory-card {
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  transition: box-shadow var(--duration) var(--ease);
}

.directory-card:hover {
  box-shadow: var(--shadow-sm);
}

.directory-card__region {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.directory-card__name {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 8px 0;
  color: var(--color-text);
}

.directory-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- Bill items --- */
.bill-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.bill-item {
  padding: 20px 24px;
  background: var(--color-surface);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  box-shadow: var(--shadow-sm);
}

.bill-item__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.bill-item p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.tip-inline {
  padding: 16px 20px;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-soft);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  color: var(--color-primary-darker);
  line-height: 1.6;
}

.tip-inline strong {
  font-weight: 600;
}

/* --- Steps list --- */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 640px;
}

.steps-list__item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.steps-list__num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: white;
  font-weight: 700;
  font-size: 0.9375rem;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 166, 81, 0.25);
}

.steps-list__title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.steps-list__item p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* --- Rights grid --- */
.rights-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.rights-card {
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  transition: box-shadow var(--duration) var(--ease);
}

.rights-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-soft);
}

.rights-card__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-primary-dark);
}

.rights-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- FAQ --- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-item.is-open {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-primary-soft);
}

.faq-item.is-open .faq-item__question {
  color: var(--color-primary-dark);
}

.faq-item__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 0.9375rem;
  font-weight: 500;
  text-align: left;
  color: var(--color-text);
  transition: color var(--duration);
}

.faq-item__question:hover {
  color: var(--color-primary-dark);
}

.faq-item__icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  position: relative;
}

.faq-item__icon::before,
.faq-item__icon::after {
  content: '';
  position: absolute;
  background: var(--color-text-muted);
  border-radius: 1px;
  transition: transform var(--duration) var(--ease);
}

.faq-item__icon::before {
  width: 10px;
  height: 2px;
  top: 8px;
  left: 4px;
}

.faq-item__icon::after {
  width: 2px;
  height: 10px;
  top: 4px;
  left: 8px;
}

.faq-item.is-open .faq-item__icon::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq-item__answer {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--duration) var(--ease);
}

.faq-item.is-open .faq-item__answer {
  max-height: 200px;
}

.faq-item__answer p {
  padding: 0 22px 18px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* --- Closing --- */
.closing {
  padding: 64px 0 80px;
  text-align: center;
  background: var(--epm-green);
  color: #fff;
}

.closing__title {
  font-family: var(--font-serif);
  font-size: clamp(1.375rem, 3vw, 1.75rem);
  font-weight: 600;
  margin-bottom: 12px;
  color: #ffffff;
}

.closing__text {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.88);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- Footer --- */
.footer {
  padding: 48px 0 32px;
  background: var(--epm-green-darker);
  color: rgba(255, 255, 255, 0.78);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer__logo {
  display: block;
  font-size: 1.125rem;
  font-weight: 600;
  color: white;
  margin-bottom: 12px;
}

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

.footer__brand p {
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer__heading {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: white;
  margin-bottom: 16px;
}

.footer__links li {
  margin-bottom: 8px;
}

.footer__links a {
  font-size: 0.875rem;
  transition: color var(--duration);
}

.footer__links a:hover {
  color: white;
}

.footer__legal {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer__legal p {
  font-size: 0.8125rem;
}

.footer__disclaimer {
  margin-top: 8px;
  opacity: 0.7;
}

/* --- Reveal animations --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease),
              transform var(--duration-slow) var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay { transition-delay: 100ms; }
.reveal--delay-2 { transition-delay: 200ms; }
.reveal--delay-3 { transition-delay: 300ms; }

/* --- Responsive --- */
@media (max-width: 768px) {
  .header__nav {
    position: fixed;
    top: calc(var(--header-height) + 37px);
    left: 0;
    right: 0;
    background: var(--epm-green-dark);
    backdrop-filter: blur(16px);
    padding: 24px;
    border-bottom: 3px solid var(--epm-lime);
    transform: translateY(-120%);
    opacity: 0;
    transition: all var(--duration) var(--ease);
  }

  .header__nav.is-open .header__link {
    color: #ffffff;
    font-size: 1rem;
  }

  .header__nav.is-open {
    transform: translateY(0);
    opacity: 1;
  }

  .header__list {
    flex-direction: column;
    gap: 16px;
  }

  .header__toggle {
    display: flex;
  }

  .stats-row,
  .compare-cards,
  .tips-grid,
  .directory-grid,
  .bill-items,
  .rights-grid,
  .services-grid,
  .emergency-blocks {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 48px 0;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }

  .reveal {
    opacity: 1;
    transform: none;
  }
}