/* =========================================
   Julio Higidio Blog — Styles
   ========================================= */

/* =========================================
   1. Custom Properties
   ========================================= */
:root {
  /* Brand Colors */
  --color-primary:      #001f3d;
  --color-primary-soft: rgba(0, 31, 61, 0.08);
  --color-accent:       #ec6817;
  --color-bg-light:     #f5f7f8;
  --color-bg-card:      #ffffff;
  --color-bg-dark:      #0f1923;
  --color-text:         #0f172a;
  --color-text-muted:   #64748b;
  --color-text-light:   #94a3b8;
  --color-white:        #ffffff;
  --color-border:       #e2e8f0;

  /* Typography */
  --font-sans: 'Inter', sans-serif;

  /* Border Radius */
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.5rem;
  --radius-3xl:  2rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md:  0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.05);
  --shadow-lg:  0 10px 25px -5px rgba(0, 0, 0, 0.10), 0 4px 10px -3px rgba(0, 0, 0, 0.05);
  --shadow-xl:  0 20px 40px -10px rgba(0, 0, 0, 0.12);

  /* Transition */
  --transition: all 0.25s ease;

  /* Container widths */
  --container-max: 80rem;   /* 1280px */
  --container-lg:  64rem;   /* 1024px */
  --container-md:  48rem;   /* 768px */
}

/* Dark mode tokens */
html.dark {
  --color-bg-light:   #0f1923;
  --color-bg-card:    #1e293b;
  --color-text:       #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-light: #64748b;
  --color-border:     #1e293b;
  --color-primary-soft: rgba(255, 255, 255, 0.06);
}

/* =========================================
   2. Reset & Base
   ========================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-light);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

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

ul, ol {
  list-style: none;
}

/* =========================================
   3. Layout & Containers
   ========================================= */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

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

/* =========================================
   4. Typography Helpers
   ========================================= */
.text-center { text-align: center; }

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

html.dark .text-primary {
  color: #7cb9e8;
}

/* =========================================
   5. Buttons
   ========================================= */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 700;
  text-align: center;
  border-radius: var(--radius-lg);
  transition: var(--transition);
  cursor: pointer;
  line-height: 1.3;
  border: none;
  white-space: nowrap;
}

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

.btn--primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--outline:hover {
  background-color: var(--color-bg-light);
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  border-radius: var(--radius-lg);
}

.btn--lg {
  padding: 1rem 2.5rem;
  font-size: 1rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.btn--icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  background: none;
  border: none;
  color: var(--color-text-muted);
  transition: var(--transition);
}

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

html.dark .btn--icon:hover {
  color: var(--color-white);
}

/* =========================================
   6. Header
   ========================================= */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(245, 247, 248, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

html.dark .header {
  background-color: rgba(15, 25, 35, 0.85);
}

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

.header__inner {
  height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

/* Brand */
.header__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.header__logo-img {
  height: 2.75rem;
  width: auto;
  display: block;
}

html.dark .header__logo-img {
  filter: brightness(0) invert(1);
}

/* Navigation */
.header__nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary);
  font-weight: 600;
}

html.dark .nav__link:hover,
html.dark .nav__link--active {
  color: var(--color-white);
}

html.dark .nav__link {
  color: var(--color-text-muted);
}

/* Header actions */
.header__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Burger */
.burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.burger:hover {
  background-color: var(--color-primary-soft);
}

.burger__line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

html.dark .burger__line {
  background-color: var(--color-text);
}

/* Mobile nav overlay */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 49;
  background-color: var(--color-bg-card);
  padding: 6rem 1.5rem 2rem;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav__link {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--color-border);
  transition: color 0.2s ease;
}

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

.mobile-nav__cta {
  margin-top: 1.5rem;
}

/* =========================================
   7. Main sections spacing
   ========================================= */
.section {
  padding: 4rem 0;
}

.section--lg {
  padding: 5rem 0;
}

.section__header {
  margin-bottom: 3rem;
}

.section__header--between {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 3rem;
}

.section__title {
  font-size: 1.875rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1.25;
}

.section__subtitle {
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.section__link {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  white-space: nowrap;
  flex-shrink: 0;
  transition: opacity 0.2s ease;
}

.section__link:hover {
  opacity: 0.75;
  text-decoration: underline;
}

html.dark .section__link {
  color: #7cb9e8;
}

/* =========================================
   8. Hero Section
   ========================================= */
.hero {
  padding: 4rem 0;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

.hero__badge {
  display: inline-block;
  padding: 0.25rem 0.875rem;
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
}

html.dark .hero__badge {
  color: #7cb9e8;
}

.hero__title {
  font-size: 2.75rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: 1.25rem;
}

.hero__title .highlight {
  color: var(--color-primary);
}

html.dark .hero__title .highlight {
  color: #7cb9e8;
}

.hero__description {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 36rem;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero__image-wrapper {
  position: relative;
}

.hero__image {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-3xl);
  overflow: hidden;
  background-color: var(--color-border);
  box-shadow: var(--shadow-xl);
  transform: rotate(2deg);
  transition: transform 0.5s ease;
}

.hero__image:hover {
  transform: rotate(0deg);
}

.hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__tip {
  position: absolute;
  bottom: -1.5rem;
  left: -1.5rem;
  background-color: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 18rem;
}

.hero__tip-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.25rem;
}

.hero__tip-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text);
}

.hero__tip-text {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.125rem;
}

/* =========================================
   9. Categories Section
   ========================================= */
.categories__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.category-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: 2rem;
  cursor: pointer;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

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

.category-card__icon {
  width: 3.5rem;
  height: 3.5rem;
  background-color: var(--color-primary-soft);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  transition: background-color 0.25s ease;
  color: var(--color-primary);
}

.category-card:hover .category-card__icon {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.category-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.category-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* =========================================
   10. Articles Section
   ========================================= */
.articles__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.article-card {
  display: flex;
  flex-direction: column;
}

.article-card__image {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  background-color: var(--color-border);
  margin-bottom: 1.5rem;
}

.article-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.article-card__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

html.dark .article-card__meta {
  color: #7cb9e8;
}

.article-card__meta-dot {
  width: 0.25rem;
  height: 0.25rem;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.article-card__date {
  color: var(--color-text-muted);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
}

.article-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
  margin-bottom: 0.75rem;
  transition: color 0.2s ease;
}

.article-card:hover .article-card__title {
  color: var(--color-primary);
}

html.dark .article-card:hover .article-card__title {
  color: #7cb9e8;
}

.article-card__excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* =========================================
   11. Newsletter Section
   ========================================= */
.newsletter {
  padding: 4rem 0;
}

.newsletter__card {
  background-color: var(--color-primary);
  border-radius: var(--radius-3xl);
  padding: 3.5rem 2rem;
  text-align: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.newsletter__bg-blob {
  position: absolute;
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.05);
  filter: blur(40px);
  pointer-events: none;
}

.newsletter__bg-blob--1 {
  width: 16rem;
  height: 16rem;
  top: -4rem;
  right: -4rem;
}

.newsletter__bg-blob--2 {
  width: 24rem;
  height: 24rem;
  bottom: -6rem;
  left: -6rem;
}

.newsletter__inner {
  position: relative;
  z-index: 1;
  max-width: 36rem;
  margin: 0 auto;
}

.newsletter__title {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.newsletter__subtitle {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.0625rem;
  line-height: 1.65;
  margin-bottom: 2rem;
}

.newsletter__form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.newsletter__input {
  flex: 1;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-xl);
  border: none;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  background-color: var(--color-white);
  outline: none;
}

.newsletter__input:focus {
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.25);
}

.newsletter__submit {
  padding: 1rem 2rem;
  border-radius: var(--radius-xl);
  background-color: var(--color-white);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1rem;
  font-family: var(--font-sans);
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease;
  white-space: nowrap;
}

.newsletter__submit:hover {
  background-color: #f1f5f9;
}

.newsletter__disclaimer {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 1rem;
}

/* =========================================
   12. Footer
   ========================================= */
.footer {
  background-color: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer__brand-logo {
  display: inline-block;
  margin-bottom: 1rem;
}

.footer__main-logo {
  height: 5rem;
  width: auto;
}

html.dark .footer__main-logo {
  filter: brightness(0) invert(1);
}

.footer__brand-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-top: 1rem;
  max-width: 22rem;
}

.footer__social {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.footer__social-link {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 1rem;
  transition: var(--transition);
}

.footer__social-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

html.dark .footer__social-link:hover {
  color: var(--color-white);
  border-color: var(--color-white);
}

.footer__heading {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.footer__links a {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

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

html.dark .footer__links a:hover {
  color: var(--color-white);
}

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
  text-align: center;
}

.footer__copy {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer__tagline {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer__tagline-accent {
  color: var(--color-primary);
}

html.dark .footer__tagline-accent {
  color: #7cb9e8;
}

/* =========================================
   13. Scroll To Top Button
   ========================================= */
.scroll-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  border: none;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
  transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.2s ease;
}

.scroll-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.scroll-top:hover {
  background-color: rgba(0, 31, 61, 0.82);
  transform: translateY(-2px);
}

/* =========================================
   14. Responsive — Tablet (≥ 640px)
   ========================================= */
@media (min-width: 640px) {
  .categories__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .articles__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .newsletter__form {
    flex-direction: row;
  }

  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* =========================================
   14. Responsive — Desktop (≥ 1024px)
   ========================================= */
@media (min-width: 1024px) {
  .header__nav {
    display: flex;
  }

  .burger {
    display: none;
  }

  .hero {
    padding: 5rem 0 6rem;
  }

  .hero__inner {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }

  .hero__title {
    font-size: 3.75rem;
  }

  .section--lg {
    padding: 6rem 0;
  }

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

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

  .newsletter__card {
    padding: 5rem 4rem;
  }

  .newsletter__title {
    font-size: 2.5rem;
  }

  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}