/*
Theme Name: bz-theme
Description: Professional business blog theme
Version: 1.0
Text Domain: bz-theme
*/

/* ============================================================
   0. CSS CUSTOM PROPERTIES (overridden by colors.css)
   ============================================================ */
:root {
  --bz-primary: #F59E0B;
  --bz-primary-dark: #D97706;
  --bz-heading: #27272A;
  --bz-text: #3F3F46;
  --bz-bg: #ffffff;
  --bz-bg-alt: #FAFAF9;
  --bz-border: #E4E4E7;
  --bz-radius: 6px;
  --bz-radius-lg: 12px;
  --bz-shadow: 0 4px 20px rgba(39,39,42,0.10);
  --bz-font-heading: 'Poppins', sans-serif;
  --bz-font-body: 'Inter', sans-serif;
}

/* ============================================================
   1. RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--bz-font-body);
  font-size: 18px;
  line-height: 1.7;
  color: var(--bz-text);
  background: var(--bz-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--bz-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--bz-primary-dark); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--bz-font-heading);
  color: var(--bz-heading);
  line-height: 1.25;
  font-weight: 700;
}
h1 { font-size: clamp(2rem, 4vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.35rem); }

/* ============================================================
   2. LAYOUT
   ============================================================ */
.bz-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.bz-section {
  padding: 48px 0;
}

@media (min-width: 768px) {
  .bz-container { padding: 0 32px; }
  .bz-section { padding: 80px 0; }
}

/* ============================================================
   3. GRID UTILITIES
   ============================================================ */
.bz-grid-2, .bz-grid-3, .bz-grid-4 {
  display: grid;
  gap: 24px;
}
.bz-grid-2 { grid-template-columns: 1fr; }
.bz-grid-3 { grid-template-columns: 1fr; }
.bz-grid-4 { grid-template-columns: 1fr; }

@media (min-width: 768px) {
  .bz-grid-2 { grid-template-columns: repeat(2, 1fr); }
  .bz-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .bz-grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .bz-grid-3 { grid-template-columns: repeat(3, 1fr); }
  .bz-grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================================
   4. BUTTONS
   ============================================================ */
.bz-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--bz-font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--bz-radius);
  cursor: pointer;
  transition: all .2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.bz-btn--primary {
  background: var(--bz-primary);
  color: #fff;
}
.bz-btn--primary:hover {
  background: var(--bz-primary-dark);
  color: #fff;
}
.bz-btn--outline {
  background: transparent;
  color: var(--bz-primary);
  border-color: var(--bz-primary);
}
.bz-btn--outline:hover {
  background: var(--bz-primary);
  color: #fff;
}
.bz-btn--ghost {
  background: transparent;
  color: var(--bz-text);
  border-color: transparent;
}
.bz-btn--ghost:hover {
  background: var(--bz-bg-alt);
}

/* ============================================================
   5. CARDS
   ============================================================ */
.bz-card {
  background: var(--bz-bg);
  border: 1px solid var(--bz-border);
  border-radius: var(--bz-radius-lg);
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease;
}
.bz-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--bz-shadow);
}
.bz-card__img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.bz-card__body {
  padding: 24px;
}
.bz-card__category {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--bz-primary);
  margin-bottom: 8px;
}
.bz-card__title {
  font-size: 1.15rem;
  margin-bottom: 8px;
}
.bz-card__title a { color: var(--bz-heading); }
.bz-card__title a:hover { color: var(--bz-primary); }
.bz-card__excerpt {
  font-size: 15px;
  color: var(--bz-text);
  opacity: .8;
  margin-bottom: 12px;
}
.bz-card__meta {
  font-size: 13px;
  color: var(--bz-text);
  opacity: .6;
}

/* ============================================================
   6. HEADER
   ============================================================ */
.bz-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bz-bg);
  border-bottom: 1px solid var(--bz-border);
  transition: box-shadow .3s ease;
}
.bz-header.scrolled {
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
}
.bz-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.bz-logo {
  font-family: var(--bz-font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--bz-heading);
}
.bz-logo:hover { color: var(--bz-heading); }
.bz-nav { display: none; list-style: none; gap: 32px; align-items: center; }
.bz-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--bz-text);
  transition: color .2s;
}
.bz-nav a:hover { color: var(--bz-primary); }

.bz-burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.bz-burger span {
  width: 22px;
  height: 2px;
  background: var(--bz-heading);
  transition: transform .3s;
}

.bz-mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--bz-bg);
  padding: 80px 24px 24px;
  transform: translateX(100%);
  transition: transform .3s ease;
}
.bz-mobile-nav.open { transform: translateX(0); }
.bz-mobile-nav__close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--bz-heading);
}
.bz-mobile-nav ul { list-style: none; }
.bz-mobile-nav li { padding: 12px 0; border-bottom: 1px solid var(--bz-border); }
.bz-mobile-nav a { font-size: 18px; font-weight: 500; color: var(--bz-heading); }

@media (min-width: 768px) {
  .bz-nav { display: flex; }
  .bz-burger { display: none; }
}

/* Header variant D — transparent overlay */
.bz-header--transparent {
  position: absolute;
  width: 100%;
  background: transparent;
  border-bottom: none;
}
.bz-header--transparent .bz-logo,
.bz-header--transparent .bz-nav a { color: #fff; }
.bz-header--transparent.scrolled {
  position: sticky;
  background: var(--bz-bg);
}
.bz-header--transparent.scrolled .bz-logo,
.bz-header--transparent.scrolled .bz-nav a { color: var(--bz-heading); }

/* Header variant C — top bar */
.bz-topbar {
  background: var(--bz-bg-alt);
  border-bottom: 1px solid var(--bz-border);
  font-size: 13px;
  padding: 6px 0;
  color: var(--bz-text);
}
.bz-topbar__inner {
  display: flex;
  justify-content: flex-end;
  gap: 24px;
}

/* ============================================================
   7. FOOTER
   ============================================================ */
.bz-footer {
  background: var(--bz-heading);
  color: rgba(255,255,255,.7);
  padding: 48px 0 0;
}
.bz-footer a { color: rgba(255,255,255,.7); }
.bz-footer a:hover { color: #fff; }
.bz-footer__grid {
  display: grid;
  gap: 32px;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .bz-footer__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .bz-footer__grid--4 { grid-template-columns: 2fr 1fr 1fr 1fr; }
  .bz-footer__grid--3 { grid-template-columns: 1fr 1fr 1fr; }
}
.bz-footer__heading {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}
.bz-footer__list { list-style: none; }
.bz-footer__list li { margin-bottom: 8px; }
.bz-footer__list a { font-size: 14px; }

.bz-footer__bottom {
  margin-top: 40px;
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,.15);
  font-size: 13px;
}
.bz-footer__bottom-inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
}
@media (min-width: 768px) {
  .bz-footer__bottom-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}
.bz-footer__legal { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; }

/* Back to top */
.bz-back-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bz-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .3s, transform .3s;
  z-index: 50;
}
.bz-back-top.visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   8. SINGLE ARTICLE
   ============================================================ */
.bz-article-hero {
  position: relative;
  width: 100%;
  aspect-ratio: 21 / 9;
  overflow: hidden;
}
.bz-article-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.bz-article-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.5), transparent);
}

.bz-article-content {
  max-width: 740px;
  margin: 0 auto;
  padding: 32px 20px;
}
.bz-article-content h2 { margin: 2em 0 .75em; }
.bz-article-content h3 { margin: 1.5em 0 .5em; }
.bz-article-content p { margin-bottom: 1.25em; }
.bz-article-content ul, .bz-article-content ol {
  margin: 0 0 1.25em 1.5em;
}
.bz-article-content blockquote {
  border-left: 3px solid var(--bz-primary);
  padding: 16px 20px;
  margin: 1.5em 0;
  background: var(--bz-bg-alt);
  border-radius: var(--bz-radius);
}
.bz-article-content img {
  border-radius: var(--bz-radius);
  margin: 1.5em 0;
}

/* Article meta */
.bz-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
  color: var(--bz-text);
  opacity: .65;
  margin-bottom: 24px;
}
.bz-meta__item { display: flex; align-items: center; gap: 6px; }

/* Author card */
.bz-author-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 24px;
  background: var(--bz-bg-alt);
  border-radius: var(--bz-radius-lg);
  margin: 2em 0;
}
.bz-author-card__avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--bz-border);
  flex-shrink: 0;
  object-fit: cover;
}
.bz-author-card__name {
  font-weight: 600;
  font-size: 16px;
  color: var(--bz-heading);
}
.bz-author-card__bio {
  font-size: 14px;
  margin-top: 4px;
  opacity: .8;
}

/* Table of Contents */
.bz-toc {
  background: var(--bz-bg-alt);
  border: 1px solid var(--bz-border);
  border-radius: var(--bz-radius-lg);
  padding: 20px 24px;
  margin-bottom: 2em;
}
.bz-toc__title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--bz-heading);
}
.bz-toc ol { margin: 0; padding-left: 1.25em; }
.bz-toc li { margin-bottom: 6px; font-size: 15px; }
.bz-toc a { color: var(--bz-text); }
.bz-toc a:hover { color: var(--bz-primary); }

/* Tags */
.bz-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 2em 0; }
.bz-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 13px;
  background: var(--bz-bg-alt);
  border: 1px solid var(--bz-border);
  border-radius: var(--bz-radius);
  color: var(--bz-text);
}
.bz-tag:hover { border-color: var(--bz-primary); color: var(--bz-primary); }

/* ============================================================
   9. ARCHIVE / BLOG LISTING
   ============================================================ */
.bz-cat-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.bz-cat-filter a {
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--bz-radius);
  background: var(--bz-bg-alt);
  color: var(--bz-text);
  border: 1px solid var(--bz-border);
}
.bz-cat-filter a:hover,
.bz-cat-filter a.active {
  background: var(--bz-primary);
  color: #fff;
  border-color: var(--bz-primary);
}

/* Archive variant B — list */
.bz-list-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--bz-border);
}
@media (min-width: 768px) {
  .bz-list-card { flex-direction: row; }
  .bz-list-card__img { width: 280px; flex-shrink: 0; }
}
.bz-list-card__img img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--bz-radius);
}

/* Archive variant C — magazine */
.bz-magazine { display: grid; gap: 24px; }
@media (min-width: 768px) {
  .bz-magazine { grid-template-columns: 1fr 1fr; }
  .bz-magazine__featured { grid-column: 1; grid-row: 1 / 3; }
}

/* Archive variant D — masonry */
.bz-masonry { columns: 1; gap: 24px; }
.bz-masonry .bz-card { break-inside: avoid; margin-bottom: 24px; }
@media (min-width: 768px) { .bz-masonry { columns: 2; } }
@media (min-width: 1024px) { .bz-masonry { columns: 3; } }

/* Pagination */
.bz-pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}
.bz-pagination a, .bz-pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--bz-border);
  border-radius: var(--bz-radius);
  font-size: 14px;
  font-weight: 500;
  color: var(--bz-text);
}
.bz-pagination a:hover { border-color: var(--bz-primary); color: var(--bz-primary); }
.bz-pagination .current {
  background: var(--bz-primary);
  color: #fff;
  border-color: var(--bz-primary);
}

/* ============================================================
   10. PAGE
   ============================================================ */
.bz-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 20px;
}
.bz-page__title {
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--bz-border);
}
.bz-page__content p { margin-bottom: 1.25em; }
.bz-page__content ul, .bz-page__content ol { margin: 0 0 1.25em 1.5em; }

/* ============================================================
   11. CONTACT
   ============================================================ */
.bz-contact {
  padding: 80px 0;
}
.bz-contact .bz-container {
  max-width: 1000px;
  margin: 0 auto;
}
.bz-contact__info { display: flex; flex-direction: column; gap: 24px; }
.bz-contact__item { display: flex; gap: 12px; align-items: flex-start; }
.bz-contact__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--bz-radius);
  background: var(--bz-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--bz-primary);
}
.bz-contact__form .wpcf7 input[type="text"],
.bz-contact__form .wpcf7 input[type="email"],
.bz-contact__form .wpcf7 textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--bz-border);
  border-radius: var(--bz-radius);
  font-family: var(--bz-font-body);
  font-size: 15px;
  transition: border-color .2s;
}
.bz-contact__form .wpcf7 input:focus,
.bz-contact__form .wpcf7 textarea:focus {
  outline: none;
  border-color: var(--bz-primary);
}

/* ============================================================
   12. 404
   ============================================================ */
.bz-404 {
  text-align: center;
  padding: 80px 20px;
}
.bz-404__number {
  font-size: clamp(6rem, 15vw, 12rem);
  font-weight: 800;
  font-family: var(--bz-font-heading);
  color: var(--bz-border);
  line-height: 1;
}

/* ============================================================
   13. NEWSLETTER CTA (Footer variant C)
   ============================================================ */
.bz-newsletter {
  background: var(--bz-primary);
  color: #fff;
  padding: 48px 0;
  text-align: center;
}
.bz-newsletter__title { color: #fff; margin-bottom: 8px; }
.bz-newsletter__form {
  display: flex;
  gap: 8px;
  max-width: 440px;
  margin: 24px auto 0;
}
.bz-newsletter__input {
  flex: 1;
  padding: 12px 16px;
  border: none;
  border-radius: var(--bz-radius);
  font-size: 15px;
}
.bz-newsletter__btn {
  padding: 12px 24px;
  background: var(--bz-heading);
  color: #fff;
  border: none;
  border-radius: var(--bz-radius);
  font-weight: 600;
  cursor: pointer;
}

/* ============================================================
   14. ANIMATIONS
   ============================================================ */
@keyframes bzFadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.bz-fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}
.bz-fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   15. SKIP LINK & ACCESSIBILITY
   ============================================================ */
.bz-skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 999;
  padding: 8px 16px;
  background: var(--bz-primary);
  color: #fff;
  border-radius: var(--bz-radius);
  font-size: 14px;
}
.bz-skip-link:focus { top: 8px; }

/* ============================================================
   16. RESPONSIVE TWEAKS
   ============================================================ */
@media (max-width: 767px) {
  .bz-hide-mobile { display: none !important; }
}
@media (min-width: 1280px) {
  .bz-container { padding: 0 40px; }
}