/* =========================================================
   AhorroLab — Design System
   ========================================================= */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --bg-soft-2: #fbfbfd;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --border: #d2d2d7;
  --border-soft: #e8e8ed;

  --accent: #0071e3;
  --accent-dark: #0058b0;
  --accent-soft: #e8f2fd;
  --accent-contrast: #ffffff;

  --danger: #d64545;
  --danger-soft: #fbeaea;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 1px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;

  --container: 1180px;
  --header-h: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  font-weight: 600;
}

h1 { font-size: clamp(2rem, 4vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.05rem; }

p {
  margin: 0 0 16px;
  color: var(--text);
}

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

.text-secondary { color: var(--text-secondary); }

section {
  padding: 72px 0;
}

.section-head {
  max-width: 640px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-dark);
  background: var(--accent-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}

/* =========================================================
   Buttons
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 0.98rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--accent-dark);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--bg-soft);
  color: var(--text);
  border-color: var(--border-soft);
}

.btn-secondary:hover {
  background: var(--border-soft);
}

.btn-block { width: 100%; }

/* =========================================================
   Header / Nav
   ========================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.logo svg { flex-shrink: 0; }

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  position: relative;
  padding: 4px 0;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text);
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border-soft);
    box-shadow: var(--shadow-md);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s ease;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 24px;
    gap: 4px;
  }

  .main-nav a {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-soft);
  }

  .nav-toggle { display: inline-flex; }
  .header-actions .btn { display: none; }
}

/* =========================================================
   Breadcrumb
   ========================================================= */

.breadcrumb {
  padding: 20px 0 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent-dark); }
.breadcrumb span { margin: 0 6px; }

/* =========================================================
   Hero
   ========================================================= */

.hero {
  padding: 88px 0 72px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-soft-2) 0%, var(--bg) 100%);
}

.hero h1 {
  max-width: 780px;
  margin: 0 auto 20px;
}

.hero .lead {
  max-width: 620px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--text-secondary);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.hero-stat strong {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-dark);
}

.hero-stat span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* =========================================================
   Cards / Grids
   ========================================================= */

.grid {
  display: grid;
  gap: 24px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

/* Post / comparison card */

.post-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.post-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.post-card-media {
  aspect-ratio: 16 / 9;
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--border);
  overflow: hidden;
}

.post-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.post-card-body {
  padding: 22px;
}

.post-card .tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-dark);
  margin-bottom: 10px;
}

.post-card h3 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.post-card h3 a {
  color: var(--text);
}

.post-card h3 a:hover {
  color: var(--accent-dark);
}

.post-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 18px;
}

.post-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-dark);
  border: 1px solid var(--border-soft);
  padding: 8px 16px;
  border-radius: 999px;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.post-card-cta svg {
  transition: transform 0.15s ease;
}

.post-card-cta:hover {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
}

.post-card-cta:hover svg {
  transform: translateX(2px);
}

/* =========================================================
   Article
   ========================================================= */

.article-header {
  padding: 32px 0 40px;
  max-width: 820px;
  margin: 0 auto;
  text-align: left;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 18px;
}

.article-meta .dot::before {
  content: "\2022";
  margin: 0 8px;
}

.article-cover {
  aspect-ratio: 21 / 9;
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--border);
  margin-bottom: 8px;
  overflow: hidden;
}

.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.article-body {
  max-width: 780px;
  margin: 0 auto;
  padding-bottom: 24px;
}

.article-body h2 {
  margin-top: 48px;
}

.article-body h3 {
  margin-top: 32px;
}

.article-body p {
  color: var(--text-secondary);
  font-size: 1.02rem;
}

/* Table of contents */

.toc {
  background: var(--bg-soft-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 32px 0;
}

.toc h4 {
  margin-bottom: 12px;
}

.toc ol {
  padding-left: 20px;
  margin: 0;
}

.toc li {
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.toc a { color: var(--accent-dark); }

/* Callout / tip box */

.callout {
  display: flex;
  gap: 14px;
  background: var(--accent-soft);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 28px 0;
}

.callout svg {
  flex-shrink: 0;
  color: var(--accent-dark);
  margin-top: 2px;
}

.callout p {
  margin: 0;
  color: var(--text);
  font-size: 0.96rem;
}

.callout strong {
  color: var(--accent-dark);
}

/* =========================================================
   Comparison table
   ========================================================= */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  margin: 32px 0;
}

table.compare {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
  font-size: 0.95rem;
}

table.compare th,
table.compare td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-soft);
}

table.compare thead th {
  background: var(--bg-soft-2);
  font-weight: 600;
  position: sticky;
  top: var(--header-h);
}

table.compare thead th:first-child {
  background: var(--bg-soft-2);
}

table.compare tbody tr:last-child td {
  border-bottom: none;
}

table.compare tbody tr:hover {
  background: var(--bg-soft-2);
}

table.compare td:first-child {
  color: var(--text-secondary);
  font-weight: 500;
}

th.highlight,
td.highlight {
  background: var(--accent-soft);
}

.recommended-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent-contrast);
  background: var(--accent);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 6px;
}

/* =========================================================
   Pros / Cons
   ========================================================= */

.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 32px 0;
}

@media (max-width: 640px) {
  .pros-cons { grid-template-columns: 1fr; }
}

.pc-card {
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-soft);
}

.pc-card.pros { background: var(--accent-soft); }
.pc-card.cons { background: var(--danger-soft); }

.pc-card h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.pc-card ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.94rem;
}

.pc-card ul li svg { flex-shrink: 0; margin-top: 2px; }

.pc-card.pros svg { color: var(--accent-dark); }
.pc-card.cons svg { color: var(--danger); }

/* =========================================================
   FAQ Accordion
   ========================================================= */

.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border-soft);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  border: none;
  text-align: left;
  padding: 22px 4px;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  font-family: var(--font);
}

.faq-question .chevron {
  flex-shrink: 0;
  transition: transform 0.2s ease;
  color: var(--text-secondary);
}

.faq-item.open .faq-question .chevron {
  transform: rotate(180deg);
  color: var(--accent-dark);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}

.faq-answer-inner {
  padding: 0 4px 22px;
  color: var(--text-secondary);
}

/* =========================================================
   Forms
   ========================================================= */

.form-field {
  margin-bottom: 20px;
  text-align: left;
}

.form-field label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-family: var(--font);
  font-size: 0.98rem;
  background: var(--bg);
  color: var(--text);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-field textarea {
  min-height: 140px;
  resize: vertical;
}

.form-note {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 12px;
}

.thank-you-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

/* =========================================================
   Legal pages
   ========================================================= */

.legal-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 48px 0 96px;
}

.legal-content h2 {
  margin-top: 40px;
}

.legal-content p, .legal-content li {
  color: var(--text-secondary);
}

.legal-content ul {
  padding-left: 20px;
  list-style: disc;
  margin-bottom: 16px;
}

.legal-updated {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 40px;
}

/* =========================================================
   Footer
   ========================================================= */

.site-footer {
  background: var(--bg-soft-2);
  border-top: 1px solid var(--border-soft);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 48px;
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 0.92rem;
  color: var(--text);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid var(--border-soft);
  padding: 24px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.disclaimer {
  max-width: 560px;
  text-align: right;
}

@media (max-width: 640px) {
  .footer-bottom { flex-direction: column; text-align: center; }
  .disclaimer { text-align: center; }
}