/* ==========================================================================
   ĐỒNG HÀNH CÙNG CON — design tokens
   Ý tưởng: mực chàm (indigo dye) + giấy dó (mulberry paper) + hành trình
   cùng đi. Không dùng bộ màu kem-đất nung mặc định của AI.
   ========================================================================== */

:root {
  /* Màu nền — giấy dó ngả xanh nhẹ, khác hẳn tông kem ấm quen thuộc */
  --paper: #EEF3EF;
  --paper-deep: #E2EAE3;
  --card: #FBFAF6;

  /* Mực chàm — màu chủ đạo, đậm, tĩnh, đáng tin */
  --ink: #22384A;
  --ink-soft: #3C5568;
  --ink-faint: #6E8494;

  /* Điểm nhấn — hồng san hô dịu (không phải cam đất nung) và vàng nghệ */
  --coral: #E2846C;
  --coral-deep: #C96A52;
  --ochre: #CC9A3C;

  --line: #C9D4C9;
  --shadow: 0 8px 24px rgba(34, 56, 74, 0.08);

  --font-display: "Fraunces", "Times New Roman", serif;
  --font-body: "Be Vietnam Pro", -apple-system, "Segoe UI", sans-serif;

  --radius: 4px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

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

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

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--ink);
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Header ---------- */

.site-header {
  padding: 28px 0 24px;
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand .mark {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--coral);
  transform: translateY(-2px);
}

.brand .tail {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 13px;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
}

.main-nav {
  display: flex;
  gap: 28px;
  font-size: 15px;
}

.main-nav a {
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--coral-deep);
  border-color: var(--coral-deep);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-size: 15px;
  color: var(--ink);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 76px 0 88px;
  overflow: hidden;
}

.hero-path {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.55;
  pointer-events: none;
}

.hero .wrap {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--coral-deep);
  font-weight: 600;
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--coral-deep);
}

.hero h1 {
  font-size: clamp(34px, 4.4vw, 52px);
  max-width: 15ch;
}

.hero h1 em {
  font-style: normal;
  color: var(--coral-deep);
}

.hero p.lede {
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 18px 0 30px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--ink);
  color: var(--card);
}
.btn-primary:hover { background: var(--ink-soft); }

.btn-ghost {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { background: var(--ink); color: var(--card); }

/* the "trang nhật ký" card in the hero */
.hero-note {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  box-shadow: var(--shadow);
  transform: rotate(1.2deg);
  position: relative;
}

.hero-note::before {
  content: "";
  position: absolute;
  top: 22px;
  left: -1px;
  width: 4px;
  height: calc(100% - 44px);
  background: var(--coral);
  border-radius: 0 3px 3px 0;
}

.hero-note .label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin-bottom: 10px;
}

.hero-note p {
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.5;
  margin: 0 0 14px;
  color: var(--ink);
}

.hero-note .signed {
  font-size: 14px;
  color: var(--ink-faint);
  font-style: italic;
}

/* ---------- Section scaffolding ---------- */

section { padding: 64px 0; }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.section-head h2 {
  font-size: clamp(24px, 3vw, 32px);
}

.section-head p {
  color: var(--ink-faint);
  font-size: 15px;
  max-width: 40ch;
}

/* ---------- Filters ---------- */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 34px;
}

.filter-btn {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-soft);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-btn:hover { border-color: var(--coral-deep); color: var(--coral-deep); }

.filter-btn.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--card);
}

/* ---------- Situation cards ---------- */

.trail {
  position: relative;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.situation-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.situation-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.situation-card .tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  border: 1px solid var(--line);
  padding: 3px 9px;
  border-radius: 999px;
}

.tag.age { color: var(--coral-deep); border-color: var(--coral); }

.situation-card h3 {
  font-size: 20px;
  margin: 4px 0 2px;
}

.situation-card .excerpt {
  color: var(--ink-soft);
  font-size: 14.5px;
  flex: 1;
}

.situation-card .read-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.situation-card .read-more .arrow {
  transition: transform 0.2s ease;
}

.situation-card:hover .read-more .arrow { transform: translateX(4px); }

/* ---------- About / values band ---------- */

.band {
  background: var(--ink);
  color: var(--paper);
}

.band h2 { color: var(--card); }
.band p { color: #C9D6D6; }

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 30px;
}

.value-grid .value h3 {
  color: var(--card);
  font-size: 18px;
}

.value-grid .value p {
  font-size: 14.5px;
  color: #B9C7C7;
}

.value-grid .value .num {
  font-family: var(--font-display);
  color: var(--coral);
  font-size: 15px;
  margin-bottom: 8px;
  display: block;
}

/* ---------- Newsletter / CTA strip ---------- */

.cta-strip {
  background: var(--paper-deep);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cta-strip .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding: 46px 28px;
}

.cta-strip h2 { font-size: 24px; margin-bottom: 6px; }
.cta-strip p { color: var(--ink-faint); font-size: 15px; margin: 0; }

/* ---------- Footer ---------- */

.site-footer {
  padding: 48px 0 40px;
  border-top: 1px solid var(--line);
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--ink-faint);
}

.site-footer .foot-links {
  display: flex;
  gap: 20px;
}

/* ---------- Article page ---------- */

.article-hero {
  padding: 52px 0 20px;
  border-bottom: 1px solid var(--line);
}

.article-hero .tags { display: flex; gap: 8px; margin-bottom: 18px; }

.article-hero h1 {
  font-size: clamp(28px, 4vw, 40px);
  max-width: 20ch;
}

.article-meta {
  color: var(--ink-faint);
  font-size: 14px;
  margin-top: 10px;
}

.article-body {
  max-width: 700px;
  margin: 0 auto;
  padding: 48px 28px 20px;
}

.article-body h2 {
  font-size: 24px;
  margin-top: 2.2em;
}

.article-body p { margin: 0 0 1.3em; color: var(--ink-soft); font-size: 17px; }

.article-body .lead {
  font-family: var(--font-display);
  font-size: 21px;
  color: var(--ink);
  line-height: 1.6;
}

.callout {
  background: var(--card);
  border-left: 3px solid var(--coral);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 20px 24px;
  margin: 2em 0;
  font-size: 15.5px;
  color: var(--ink-soft);
}

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

.article-cta {
  max-width: 700px;
  margin: 40px auto 0;
  padding: 0 28px 60px;
}

.article-cta .box {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  padding: 30px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.article-cta .box p { color: #C9D6D6; margin: 4px 0 0; font-size: 14.5px; }
.article-cta .box h3 { color: var(--card); margin: 0; font-size: 19px; }

/* ---------- Responsive ---------- */

@media (max-width: 880px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-note { transform: none; order: -1; }
  .card-grid { grid-template-columns: 1fr 1fr; }
  .value-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .main-nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .main-nav.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card);
    flex-direction: column;
    padding: 18px 28px;
    border-bottom: 1px solid var(--line);
    gap: 14px;
    z-index: 20;
  }
  .site-header .wrap { position: relative; }
  .card-grid { grid-template-columns: 1fr; }
  .cta-strip .wrap { flex-direction: column; align-items: flex-start; }
  .article-cta .box { flex-direction: column; align-items: flex-start; }
}
/* ============================================================
   PRACTICE BOX — "Thực hành trong 5 phút"
   ============================================================ */

.practice-box {
  background: #F4F7F4;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0;
  margin: 3em 0 2em;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.practice-header {
  background: var(--ink);
  color: var(--card);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  border-bottom: 3px solid var(--coral);
}

.practice-icon {
  font-size: 22px;
  line-height: 1;
}

.practice-header h3 {
  margin: 0;
  color: var(--card);
  font-size: 19px;
  font-family: var(--font-display);
  font-weight: 600;
  flex: 1;
}

.practice-time {
  background: rgba(255,255,255,0.15);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #d0dcdc;
}

.practice-content {
  padding: 24px 28px 28px;
}

.practice-content > p {
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--ink);
  margin-bottom: 20px;
  font-weight: 500;
}

.practice-content ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.practice-content ol li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 14px 18px;
  background: var(--card);
  border-radius: var(--radius);
  border-left: 3px solid var(--coral);
  transition: background 0.15s ease;
}

.practice-content ol li:hover {
  background: #fcfcfa;
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--coral);
  color: white;
  font-weight: 700;
  font-size: 15px;
  font-family: var(--font-display);
  margin-top: 2px;
}

.practice-content ol li div {
  flex: 1;
}

.practice-content ol li strong {
  display: block;
  color: var(--ink);
  font-size: 15px;
  margin-bottom: 2px;
}

.practice-content ol li p {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-soft);
  line-height: 1.5;
}

.practice-content ol li em {
  color: var(--coral-deep);
  font-style: italic;
  background: rgba(226, 132, 108, 0.08);
  padding: 0 4px;
  border-radius: 2px;
}

.practice-note {
  margin-top: 22px;
  padding: 16px 20px;
  background: #EEF3EF;
  border-radius: var(--radius);
  font-size: 14.5px;
  color: var(--ink-soft);
  border-left: 3px solid var(--ink-faint);
}

.practice-note strong {
  color: var(--ink);
}

/* Responsive cho mobile */
@media (max-width: 640px) {
  .practice-header {
    padding: 14px 18px;
    gap: 10px;
  }
  .practice-header h3 {
    font-size: 17px;
    width: 100%;
  }
  .practice-time {
    font-size: 12px;
  }
  .practice-content {
    padding: 18px 16px 22px;
  }
  .practice-content ol li {
    padding: 12px 14px;
    gap: 12px;
    flex-wrap: wrap;
  }
  .step-num {
    width: 28px;
    height: 28px;
    font-size: 13px;
  }
  .practice-content ol li strong {
    font-size: 14px;
  }
  .practice-content ol li p {
    font-size: 13.5px;
  }
  .practice-note {
    font-size: 13.5px;
    padding: 14px 16px;
  }
}
.practice-box {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.filters-wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.filters-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-soft);
}

.filter-count {
  font-size: 13px;
  color: var(--ink-faint);
  margin-left: auto;
}

@media (max-width: 640px) {
  .filters-wrap {
    flex-direction: column;
    align-items: stretch;
  }
  .filter-count {
    text-align: right;
  }
}