/* =============================================
   Tu Primer Celular — Landing Page
   Aesthetic: Warm Illustrated Editorial
   ============================================= */

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

:root {
  /* Warm parchment palette — pulled from the book cover */
  --parchment: #f2ebe0;
  --parchment-deep: #e8dfd0;
  --parchment-light: #f9f5ee;
  --ink: #2c241c;
  --ink-soft: #5a4e40;
  --ink-faint: #8a7d6d;
  --teal: #1e6e63;
  --teal-deep: #145049;
  --teal-glow: #2a8f80;
  --teal-wash: #d4efea;
  --terracotta: #c4583a;
  --terracotta-soft: #e8a08a;
  --cream: #fffcf5;
  --shadow-warm: rgba(44, 36, 28, 0.08);
  --shadow-deep: rgba(44, 36, 28, 0.16);

  --font-display: 'Fraunces', 'Georgia', serif;
  --font-body: 'Nunito', 'Segoe UI', sans-serif;
  --max-w: 1140px;
  --radius: 14px;
}

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

body {
  font-family: var(--font-body);
  background: var(--parchment);
  color: var(--ink);
  line-height: 1.75;
  font-size: 17px;
  overflow-x: hidden;
}

/* Paper grain texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.028;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-size: 200px;
}

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

a {
  color: var(--teal);
  text-decoration: none;
  transition: color 0.25s ease;
}

a:hover {
  color: var(--teal-deep);
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

/* --- Scroll reveal animations --- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-stagger.visible > *:nth-child(1)  { transition-delay: 0.04s; }
.reveal-stagger.visible > *:nth-child(2)  { transition-delay: 0.08s; }
.reveal-stagger.visible > *:nth-child(3)  { transition-delay: 0.12s; }
.reveal-stagger.visible > *:nth-child(4)  { transition-delay: 0.16s; }
.reveal-stagger.visible > *:nth-child(5)  { transition-delay: 0.20s; }
.reveal-stagger.visible > *:nth-child(6)  { transition-delay: 0.24s; }
.reveal-stagger.visible > *:nth-child(7)  { transition-delay: 0.28s; }
.reveal-stagger.visible > *:nth-child(8)  { transition-delay: 0.32s; }
.reveal-stagger.visible > *:nth-child(9)  { transition-delay: 0.36s; }
.reveal-stagger.visible > *:nth-child(10) { transition-delay: 0.40s; }
.reveal-stagger.visible > *:nth-child(11) { transition-delay: 0.44s; }
.reveal-stagger.visible > *:nth-child(12) { transition-delay: 0.48s; }
.reveal-stagger.visible > *:nth-child(13) { transition-delay: 0.52s; }
.reveal-stagger.visible > *:nth-child(14) { transition-delay: 0.56s; }

.reveal-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================
   HEADER
   ========================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  transition: background 0.35s ease, box-shadow 0.35s ease, padding 0.35s ease;
}

.site-header.scrolled {
  background: rgba(242, 235, 224, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--shadow-warm);
  padding: 0.6rem 0;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.01em;
  font-variation-settings: 'opsz' 36;
}

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

nav {
  display: flex;
  gap: 0.3rem;
}

nav a {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 0.45rem 0.9rem;
  border-radius: 100px;
  transition: color 0.2s, background 0.2s;
}

nav a:hover {
  color: var(--teal);
  background: var(--teal-wash);
}

/* ==========================================
   HERO
   ========================================== */
.hero {
  padding: 5.5rem 0 2rem;
  min-height: 92vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

/* Large decorative blob */
.hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--teal-wash) 0%, transparent 70%);
  top: -100px;
  right: -150px;
  opacity: 0.5;
  animation: float-slow 18s ease-in-out infinite alternate;
}

.hero::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--terracotta-soft) 0%, transparent 70%);
  bottom: 50px;
  left: -100px;
  opacity: 0.25;
  animation: float-slow 14s ease-in-out infinite alternate-reverse;
}

@keyframes float-slow {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(20px, -30px) scale(1.08); }
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

/* Hero text */
.hero-text {
  padding-top: 1rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal);
  background: var(--teal-wash);
  padding: 0.45rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
  animation: fade-down 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}

.hero-badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
}

.hero-text h1 {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5vw, 3.8rem);
  line-height: 1.08;
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
  font-variation-settings: 'opsz' 72;
  animation: fade-down 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.hero-text h1 em {
  font-style: normal;
  color: var(--teal);
  position: relative;
}

.hero-text h1 em::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--terracotta-soft);
  border-radius: 3px;
  opacity: 0.5;
  z-index: -1;
}

.hero-subtitle {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  color: var(--teal);
  font-style: italic;
  font-weight: 400;
  margin-bottom: 1.8rem;
  font-variation-settings: 'opsz' 24;
  animation: fade-down 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.35s both;
}

.hero-desc {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 480px;
  margin-bottom: 2.2rem;
  animation: fade-down 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fade-down 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.55s both;
}

/* Hero subscribe form */
.hero-subscribe {
  max-width: 440px;
  animation: fade-down 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.55s both;
}

.hero-subscribe .subscribe-field input[type="email"] {
  background: var(--cream);
  border: 2px solid var(--parchment-deep);
  color: var(--ink);
}

.hero-subscribe .subscribe-field input[type="email"]::placeholder {
  color: var(--ink-faint);
}

.hero-subscribe .subscribe-field input[type="email"]:focus {
  border-color: var(--teal);
  background: var(--cream);
}

.hero-subscribe .subscribe-ok {
  color: var(--teal);
}

.hero-subscribe .subscribe-err {
  color: var(--terracotta);
}

.hero-learn-more {
  display: inline-block;
  margin-top: 1.2rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-soft);
  animation: fade-down 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.65s both;
}

.hero-learn-more:hover {
  color: var(--teal);
}

@keyframes fade-down {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero illustration */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  animation: fade-down 1s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both;
}

.hero-illustration {
  max-width: 380px;
  width: 100%;
}

.hero-character {
  border-radius: var(--radius);
  box-shadow: 0 16px 50px var(--shadow-deep);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-character:hover {
  transform: translateY(-6px) rotate(1deg);
}

/* Authors illustration */
.authors-illustration {
  text-align: center;
  margin-bottom: 2.5rem;
}

.authors-img {
  max-width: 520px;
  margin: 0 auto;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px var(--shadow-deep);
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border-radius: 100px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}

.btn-primary {
  background: var(--teal);
  color: var(--cream);
  border-color: var(--teal);
}

.btn-primary:hover {
  background: var(--teal-deep);
  border-color: var(--teal-deep);
  color: var(--cream);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 110, 99, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--teal);
  border-color: var(--teal);
}

.btn-secondary:hover {
  background: var(--teal);
  color: var(--cream);
  transform: translateY(-2px);
}

.btn-white {
  background: var(--cream);
  color: var(--teal);
  border-color: var(--cream);
  font-weight: 800;
}

.btn-white:hover {
  background: var(--parchment);
  border-color: var(--parchment);
  color: var(--teal-deep);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.12);
}

.btn svg {
  width: 18px;
  height: 18px;
}

/* ==========================================
   SECTIONS — shared
   ========================================== */
section {
  padding: 6rem 0;
  position: relative;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--teal);
  margin-bottom: 0.8rem;
}

.section-label::before {
  content: '';
  width: 28px;
  height: 2px;
  background: var(--teal);
  border-radius: 2px;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: 1rem;
  font-variation-settings: 'opsz' 48;
}

.section-desc {
  color: var(--ink-soft);
  max-width: 560px;
  font-size: 1.05rem;
  margin-bottom: 3rem;
}

.section-center {
  text-align: center;
}

.section-center .section-label {
  justify-content: center;
}

.section-center .section-desc {
  margin-left: auto;
  margin-right: auto;
}

/* Wave divider between sections */
.wave-divider {
  width: 100%;
  height: 60px;
  background: var(--parchment-deep);
  position: relative;
  overflow: hidden;
}

.wave-divider::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--parchment);
  clip-path: ellipse(55% 100% at 50% 100%);
}

/* ==========================================
   ABOUT SECTION
   ========================================== */
.about {
  background: var(--parchment-deep);
}

.about-illustration {
  text-align: center;
  margin-bottom: 3rem;
}

.about-img {
  max-width: 700px;
  width: 100%;
  margin: 0 auto;
  border-radius: var(--radius);
  box-shadow: 0 8px 36px var(--shadow-deep);
}

.about-content {
  max-width: 700px;
  margin: 0 auto 3rem;
  text-align: center;
}

.about-content p {
  font-size: 1.05rem;
  margin-bottom: 1.3rem;
  color: var(--ink-soft);
}

.about-content p:first-of-type {
  font-size: 1.15rem;
  color: var(--ink);
}

.about-content .section-label {
  justify-content: center;
}

.pullquote {
  position: relative;
  padding: 2.2rem 2.5rem;
  background: var(--cream);
  border-radius: var(--radius);
  margin-top: 0.5rem;
  box-shadow: 0 2px 20px var(--shadow-warm);
}

.pullquote::before {
  content: '\201C';
  font-family: var(--font-display);
  font-size: 5rem;
  line-height: 1;
  color: var(--teal);
  opacity: 0.15;
  position: absolute;
  top: 4px;
  left: 16px;
}

.pullquote p {
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.6;
  font-style: italic;
  color: var(--ink);
  font-variation-settings: 'opsz' 18;
  position: relative;
  z-index: 1;
}

.pullquote .attribution {
  font-family: var(--font-body);
  font-style: normal;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--teal);
  margin-top: 1rem;
  display: block;
}

/* About — three perspectives as cards */
.about-perspectives {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.perspective-card {
  background: var(--cream);
  border-radius: var(--radius);
  padding: 2rem 1.8rem;
  box-shadow: 0 2px 16px var(--shadow-warm);
  border-top: 3px solid transparent;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s ease;
}

.perspective-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px var(--shadow-deep);
}

.perspective-card:nth-child(1) { border-top-color: var(--teal); }
.perspective-card:nth-child(2) { border-top-color: var(--terracotta); }
.perspective-card:nth-child(3) { border-top-color: #9a7b2f; }

.perspective-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  font-variation-settings: 'opsz' 24;
}

.perspective-card:nth-child(1) h3 { color: var(--teal); }
.perspective-card:nth-child(2) h3 { color: var(--terracotta); }
.perspective-card:nth-child(3) h3 { color: #9a7b2f; }

.perspective-card p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

.about > .container > .pullquote {
  max-width: 700px;
  margin: 0 auto;
}

/* ==========================================
   TOPICS / CHAPTERS
   ========================================== */
/* ==========================================
   INTRODUCTION
   ========================================== */
.intro {
  background: var(--parchment);
}

.intro-illustration {
  text-align: center;
  margin-bottom: 3rem;
}

.intro-img {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  border-radius: var(--radius);
  box-shadow: 0 6px 28px var(--shadow-warm);
}

.intro-content {
  max-width: 700px;
  margin: 0 auto;
}

.intro-content p {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin-bottom: 1.3rem;
}

.intro-content h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--teal);
  margin-top: 2.2rem;
  margin-bottom: 0.8rem;
  font-variation-settings: 'opsz' 24;
}

.intro-content .pullquote {
  margin: 2rem 0;
}

.intro-closing {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.15rem !important;
  color: var(--ink) !important;
  margin-top: 2rem;
  font-variation-settings: 'opsz' 18;
}

/* ==========================================
   AUTHORS
   ========================================== */
.authors {
  background: var(--parchment-deep);
}

.authors-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  max-width: 820px;
  margin: 0 auto;
}

.author-card {
  background: var(--cream);
  border-radius: var(--radius);
  padding: 2.5rem 2rem 2rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 16px var(--shadow-warm);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s ease;
}

.author-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 36px var(--shadow-deep);
}

/* Decorative corner accent */
.author-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  border-radius: 0 var(--radius) 0 80px;
}

.author-card:first-child::before {
  background: #fce8e0;
}

.author-card:last-child::before {
  background: var(--teal-wash);
}

.author-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.3rem;
  position: relative;
  z-index: 1;
}

.author-card:first-child .author-icon {
  background: #fce8e0;
}

.author-card:last-child .author-icon {
  background: var(--teal-wash);
}

.author-card h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.2rem;
  font-variation-settings: 'opsz' 24;
}

.author-role {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: block;
}

.author-card:first-child .author-role { color: var(--terracotta); }
.author-card:last-child .author-role { color: var(--teal); }

.author-card p.bio {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.65;
}

/* ==========================================
   CTA SECTION
   ========================================== */
.cta {
  background: var(--parchment);
  padding: 5rem 0 6rem;
}

.cta-box {
  background: linear-gradient(135deg, var(--teal) 0%, var(--teal-deep) 100%);
  border-radius: 20px;
  padding: 4rem 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  max-width: 780px;
  margin: 0 auto;
}

/* Decorative circles in CTA */
.cta-box::before {
  content: '';
  position: absolute;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  top: -80px;
  right: -60px;
}

.cta-box::after {
  content: '';
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  bottom: -60px;
  left: -40px;
}

.cta-box h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--cream);
  margin-bottom: 0.8rem;
  position: relative;
  z-index: 1;
  font-variation-settings: 'opsz' 48;
}

.cta-box .cta-desc {
  color: rgba(255,252,245,0.85);
  font-size: 1.08rem;
  max-width: 480px;
  margin: 0 auto 2rem;
  position: relative;
  z-index: 1;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* Subscribe form inside CTA */
.subscribe-form {
  position: relative;
  z-index: 1;
  max-width: 480px;
  margin: 0 auto;
}

.subscribe-field {
  display: flex;
  gap: 0.6rem;
  align-items: stretch;
}

.subscribe-field input[type="email"] {
  flex: 1;
  min-width: 0;
  padding: 0.85rem 1.2rem;
  border: 2px solid rgba(255,252,245,0.3);
  border-radius: 100px;
  background: rgba(255,252,245,0.12);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.25s, background 0.25s;
}

.subscribe-field input[type="email"]::placeholder {
  color: rgba(255,252,245,0.5);
}

.subscribe-field input[type="email"]:focus {
  border-color: rgba(255,252,245,0.6);
  background: rgba(255,252,245,0.18);
}

.subscribe-field button {
  white-space: nowrap;
  flex-shrink: 0;
}

.subscribe-field button:disabled {
  opacity: 0.7;
  cursor: wait;
}

.subscribe-msg {
  margin-top: 1rem;
  font-size: 0.92rem;
  font-weight: 600;
  text-align: center;
}

.subscribe-ok {
  color: var(--cream);
}

.subscribe-err {
  color: var(--terracotta-soft);
}

/* Confirmation page */
.confirm-page {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 0 4rem;
}

.confirm-box {
  text-align: center;
  max-width: 500px;
  margin: 0 auto;
}

.confirm-icon {
  color: var(--teal);
  margin-bottom: 1.5rem;
}

.confirm-box h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 1rem;
  font-variation-settings: 'opsz' 48;
}

.confirm-box p {
  color: var(--ink-soft);
  font-size: 1.08rem;
  margin-bottom: 0.5rem;
}

.confirm-box .btn {
  margin-top: 2rem;
}

/* ==========================================
   FOOTER
   ========================================== */
.site-footer {
  background: var(--ink);
  color: rgba(255,252,245,0.55);
  padding: 3rem 0 2.5rem;
  font-size: 0.88rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: rgba(255,252,245,0.8);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: rgba(255,252,245,0.55);
  font-size: 0.88rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: rgba(255,252,245,0.9);
}

.footer-copy {
  width: 100%;
  text-align: center;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 900px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }

  .hero-text {
    order: 2;
  }

  .hero-visual {
    order: 1;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-subscribe {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-learn-more {
    display: block;
    text-align: center;
  }

  .hero-illustration {
    max-width: 280px;
    margin: 0 auto;
  }

  .about-perspectives {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

  .authors-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
  }
}

@media (max-width: 768px) {
  nav {
    display: none;
  }

  .hero {
    padding: 5.5rem 0 2rem;
    min-height: auto;
  }

  section {
    padding: 4.5rem 0;
  }

  .topics-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cta-box {
    padding: 3rem 1.5rem;
  }

  .subscribe-field {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 16px;
  }

  .container {
    padding: 0 1.25rem;
  }

  .hero-text h1 {
    font-size: 2.2rem;
  }

  .topics-grid {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .topic-card {
    padding: 1.3rem;
  }

  .topic-number {
    font-size: 1.8rem;
  }

  .pullquote {
    padding: 1.5rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
  }
}