/* ═══════════════════════════════════════════════════════════════════════════
   FELIPE SÁ FERREIRA - SITE PESSOAL
   Design Editorial Premium | SEO Optimized | Accessibility First
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   CSS CUSTOM PROPERTIES (Design Tokens)
   ───────────────────────────────────────────────────────────────────────────── */
:root {
  /* Primary Palette - Aulus Tech Teal/Blue */
  --color-primary: #0D9488;
  --color-primary-light: #14B8A6;
  --color-primary-dark: #0F766E;
  --color-secondary: #0EA5E9;
  --color-secondary-light: #38BDF8;
  --color-accent: #42E0B4;
  
  /* Neutral Palette */
  --color-bg-primary: #FAFBFC;
  --color-bg-secondary: #F8F6F3;
  --color-bg-tertiary: #F1F5F9;
  --color-bg-card: #FFFFFF;
  
  /* Text Colors */
  --color-text-primary: #1E293B;
  --color-text-secondary: #475569;
  --color-text-muted: #64748B;
  --color-text-inverse: #FFFFFF;
  
  /* Semantic Colors */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  
  /* Typography */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Font Sizes (Fluid Typography) */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.5rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 4.5rem);
  
  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 0 40px -10px var(--color-primary);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* Layout */
  --container-max: 1200px;
  --container-prose: 720px;
  --header-height: 80px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   CSS RESET & BASE STYLES
   ───────────────────────────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

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

a:hover {
  color: var(--color-primary-dark);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text-primary);
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

/* Focus Styles for Accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Selection */
::selection {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* ─────────────────────────────────────────────────────────────────────────────
   LAYOUT UTILITIES
   ───────────────────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--prose {
  max-width: var(--container-prose);
}

.section {
  padding-block: var(--space-16);
}

.section--lg {
  padding-block: var(--space-24);
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   HEADER & NAVIGATION
   ───────────────────────────────────────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(250, 251, 252, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
}

.header__logo-img {
  height: 40px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav__link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

/* Mobile Menu */
.nav__toggle {
  display: none;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
}

.nav__toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  position: relative;
  transition: background var(--transition-fast);
}

.nav__toggle-icon::before,
.nav__toggle-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-text-primary);
  transition: transform var(--transition-base);
}

.nav__toggle-icon::before { top: -7px; }
.nav__toggle-icon::after { bottom: -7px; }

@media (max-width: 768px) {
  .nav__toggle {
    display: block;
  }
  
  .nav__list {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg-primary);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }
  
  .nav__list--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav__item {
    width: 100%;
  }
  
  .nav__link {
    display: block;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }
  
  .nav__link::after {
    display: none;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   HERO SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + var(--space-12));
  padding-bottom: var(--space-16);
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 150%;
  background: radial-gradient(ellipse, rgba(13, 148, 136, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse, rgba(14, 165, 233, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__content {
  animation: fadeInUp 0.8s ease-out;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(13, 148, 136, 0.1);
  border: 1px solid rgba(13, 148, 136, 0.2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-6);
}

.hero__title {
  font-size: var(--text-5xl);
  font-weight: 700;
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-primary-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 500px;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.hero__image-wrapper {
  position: relative;
  animation: fadeInRight 0.8s ease-out 0.2s both;
}

.hero__image {
  position: relative;
  width: 100%;
  max-width: 450px;
  margin-inline: auto;
}

.hero__image img {
  width: 100%;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
}

.hero__image-decoration {
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100%;
  height: 100%;
  border: 3px solid var(--color-primary);
  border-radius: var(--radius-2xl);
  opacity: 0.3;
  z-index: -1;
}

.hero__floating-badge {
  position: absolute;
  bottom: 30px;
  left: -30px;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  animation: float 3s ease-in-out infinite;
}

.hero__floating-badge-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  border-radius: var(--radius-lg);
  color: var(--color-text-inverse);
}

.hero__floating-badge-text {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

.hero__floating-badge-subtext {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

@media (max-width: 968px) {
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero__subtitle {
    margin-inline: auto;
  }
  
  .hero__cta {
    justify-content: center;
  }
  
  .hero__image-wrapper {
    order: -1;
  }
  
  .hero__image {
    max-width: 350px;
  }
  
  .hero__floating-badge {
    left: 50%;
    transform: translateX(-50%);
    bottom: -20px;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   BUTTONS
   ───────────────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 14px -3px rgba(13, 148, 136, 0.4);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px -3px rgba(13, 148, 136, 0.5);
  color: var(--color-text-inverse);
}

.btn--secondary {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.btn--secondary:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
}

.btn--ghost:hover {
  background: rgba(13, 148, 136, 0.1);
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   SECTION HEADERS
   ───────────────────────────────────────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section-header__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.section-header__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-inline: auto;
}

/* ─────────────────────────────────────────────────────────────────────────────
   ABOUT SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.about {
  background: var(--color-bg-secondary);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.about__content h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-6);
  color: var(--color-primary-dark);
}

.about__content p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

.about__content p:last-of-type {
  margin-bottom: var(--space-8);
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.about__stat {
  text-align: center;
}

.about__stat-number {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.about__stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

@media (max-width: 768px) {
  .about__grid {
    grid-template-columns: 1fr;
  }
  
  .about__stats {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   TIMELINE
   ───────────────────────────────────────────────────────────────────────────── */
/* ─────────────────────────────────────────────────────────────────────────────
   TIMELINE CARDS - Mobile First Design
   ───────────────────────────────────────────────────────────────────────────── */
.timeline-cards {
  display: grid;
  gap: var(--space-4);
  max-width: 1200px;
  margin-inline: auto;
}

.timeline-card {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  box-shadow: 
    0 4px 24px rgba(0, 0, 0, 0.04),
    0 1px 2px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.timeline-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: 4px 0 0 4px;
}

.timeline-card:hover {
  transform: translateY(-4px);
  box-shadow: 
    0 12px 40px rgba(13, 148, 136, 0.15),
    0 4px 12px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  border-color: rgba(13, 148, 136, 0.3);
}

.timeline-card__date {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
  letter-spacing: 0.5px;
}

.timeline-card__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2) 0;
  line-height: 1.3;
}

.timeline-card__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

/* Tablet: 2 colunas */
@media (min-width: 640px) {
  .timeline-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }
  
  .timeline-card {
    padding: var(--space-6);
  }
  
  .timeline-card__title {
    font-size: var(--text-lg);
  }
}

/* Desktop: 3 colunas */
@media (min-width: 1024px) {
  .timeline-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   BOOK SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.book {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.book__grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-16);
  align-items: center;
}

.book__cover {
  position: relative;
}

.book__cover-img {
  width: 100%;
  max-width: 320px;
  border: none;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  transform: perspective(1000px) rotateY(-5deg);
  transition: transform var(--transition-base);
}

.book__cover:hover .book__cover-img {
  transform: perspective(1000px) rotateY(0deg);
}

.book__content h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
}

.book__subtitle {
  font-size: var(--text-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

.book__description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  line-height: 1.8;
}

.book__meta {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.book__meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.book__meta-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

.book__cta {
  display: flex;
  gap: var(--space-4);
}

.book .btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

@media (max-width: 768px) {
  .book__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .book__cover {
    max-width: 250px;
    margin-inline: auto;
  }
  
  .book__cover-img {
    transform: none;
  }
  
  .book__meta {
    justify-content: center;
  }
  
  .book__cta {
    justify-content: center;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   PRODUCTS SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.products {
  background: var(--color-bg-tertiary);
}

.products__intro {
  text-align: center;
  margin-bottom: var(--space-12);
}

.products__logo {
  width: 200px;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.product-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.product-card__logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: var(--space-6);
}

.product-card__name {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

.product-card__tagline {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.product-card__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  flex-grow: 1;
}

.product-card__features {
  list-style: none;
  margin-bottom: var(--space-6);
}

.product-card__features li {
  position: relative;
  padding-left: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.product-card__features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
}

.product-card__badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: rgba(13, 148, 136, 0.1);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

@media (max-width: 968px) {
  .products__grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin-inline: auto;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   BLOG SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.blog {
  background: var(--color-bg-primary);
}

.blog__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.blog-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.blog-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.blog-card__image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.blog-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.blog-card:hover .blog-card__image img {
  transform: scale(1.05);
}

.blog-card__image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.8) 0%, rgba(14, 165, 233, 0.8) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card__image-icon {
  width: 64px;
  height: 64px;
  color: var(--color-text-inverse);
  opacity: 0.9;
}

.blog-card__content {
  padding: var(--space-6);
}

.blog-card__category {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.blog-card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.blog-card__title a {
  color: inherit;
  transition: color var(--transition-fast);
}

.blog-card__title a:hover {
  color: var(--color-primary);
}

.blog-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.blog-card__read-time {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.blog-card__read-time svg {
  width: 14px;
  height: 14px;
}

@media (max-width: 968px) {
  .blog__grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin-inline: auto;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   CONTACT SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.contact {
  background: var(--color-bg-secondary);
}

.contact__grid {
  max-width: 600px;
  margin-inline: auto;
  text-align: center;
}

.contact__content h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-6);
}

.contact__content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 400px;
  margin-inline: auto;
}

.contact__link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-xl);
  color: var(--color-text-primary);
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
  text-align: left;
}

.contact__link:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(13, 148, 136, 0.2);
}

.contact__link svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.contact__link-text {
  font-weight: 600;
}

.contact__link-handle {
  font-size: var(--text-sm);
  opacity: 0.7;
}

/* ─────────────────────────────────────────────────────────────────────────────
   FOOTER
   ───────────────────────────────────────────────────────────────────────────── */
.footer {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  padding-block: var(--space-12);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.footer__container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  text-align: center;
}

.footer__brand {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.footer__nav {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  justify-content: center;
}

.footer__nav a {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer__nav a:hover {
  color: var(--color-primary);
}

.footer__social {
  display: flex;
  gap: var(--space-4);
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(13, 148, 136, 0.1);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  transition: all var(--transition-base);
}

.footer__social a:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-3px);
}

.footer__social svg {
  width: 20px;
  height: 20px;
}

.footer__copyright {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ─────────────────────────────────────────────────────────────────────────────
   ARTICLE PAGE
   ───────────────────────────────────────────────────────────────────────────── */
.article-header {
  padding-top: calc(var(--header-height) + var(--space-16));
  padding-bottom: var(--space-12);
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

.article-header__container {
  max-width: var(--container-prose);
  margin-inline: auto;
  text-align: center;
}

.article-header__category {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.article-header__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-6);
}

.article-header__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.article-header__author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.article-header__author-img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.article-content {
  padding-block: var(--space-12);
}

.article-content__container {
  max-width: var(--container-prose);
  margin-inline: auto;
}

.article-content h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-12);
  margin-bottom: var(--space-6);
  color: var(--color-primary-dark);
}

.article-content h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

.article-content p {
  margin-bottom: var(--space-6);
  color: var(--color-text-secondary);
}

.article-content blockquote {
  margin: var(--space-8) 0;
  padding: var(--space-6) var(--space-8);
  background: var(--color-bg-secondary);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.article-content blockquote cite {
  display: block;
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  font-style: normal;
  font-weight: 600;
  color: var(--color-primary);
}

.article-content ul, .article-content ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-8);
  color: var(--color-text-secondary);
}

.article-content li {
  margin-bottom: var(--space-2);
}

.article-content .reference {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

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

.article-content .highlight-box {
  padding: var(--space-6);
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.1) 0%, rgba(14, 165, 233, 0.1) 100%);
  border-radius: var(--radius-lg);
  margin: var(--space-8) 0;
}

.article-content .highlight-box h4 {
  font-size: var(--text-lg);
  color: var(--color-primary-dark);
  margin-bottom: var(--space-4);
}

.article-nav {
  padding-block: var(--space-12);
  background: var(--color-bg-secondary);
}

.article-nav__container {
  max-width: var(--container-prose);
  margin-inline: auto;
  display: flex;
  justify-content: space-between;
  gap: var(--space-6);
}

.article-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  color: var(--color-text-primary);
  font-weight: 600;
  transition: all var(--transition-base);
}

.article-nav__link:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.article-nav__link svg {
  width: 20px;
  height: 20px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   ANIMATIONS
   ───────────────────────────────────────────────────────────────────────────── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─────────────────────────────────────────────────────────────────────────────
   PRINT STYLES
   ───────────────────────────────────────────────────────────────────────────── */
@media print {
  .header, .footer, .article-nav {
    display: none;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.5;
    color: #000;
    background: #fff;
  }
  
  .article-header {
    padding-top: 0;
  }
  
  a {
    color: #000;
    text-decoration: underline;
  }
}