/* ============================================================
   CodeSquare Theme — Design System
   main.css
   ============================================================ */

/* ─── Custom Properties ─── */
:root {
  /* Colors */
  --csq-primary:        #ff8b33;
  --csq-primary-light:  #ffa55e;
  --csq-primary-dark:   #e07020;
  --csq-dark:           #3d3d3d;
  --csq-darker:         #1a1a1a;
  --csq-darkest:        #111111;
  --csq-white:          #ffffff;
  --csq-light:          #f7f7f7;
  --csq-light-border:   #ebebeb;
  --csq-mid-gray:       #888888;
  --csq-text:           #3d3d3d;
  --csq-text-light:     #666666;
  --csq-hero-bg:        #1a1a2e;

  /* Glassmorphism */
  --csq-glass-bg:       rgba(255, 255, 255, 0.07);
  --csq-glass-border:   rgba(255, 255, 255, 0.15);
  --csq-glass-shadow:   0 8px 32px rgba(0, 0, 0, 0.3);

  /* Typography */
  --csq-font-heading:   'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --csq-font-body:      'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --csq-font-mono:      'Space Mono', 'Courier New', monospace;

  /* Spacing scale */
  --csq-space-xs:   0.5rem;
  --csq-space-sm:   1rem;
  --csq-space-md:   1.5rem;
  --csq-space-lg:   2rem;
  --csq-space-xl:   3rem;
  --csq-space-2xl:  5rem;
  --csq-space-3xl:  8rem;

  /* Border radius */
  --csq-radius-sm:  4px;
  --csq-radius-md:  8px;
  --csq-radius-lg:  16px;
  --csq-radius-xl:  24px;
  --csq-radius-full: 9999px;

  /* Shadows */
  --csq-shadow-sm:   0 2px 8px rgba(0, 0, 0, 0.08);
  --csq-shadow-md:   0 4px 24px rgba(0, 0, 0, 0.12);
  --csq-shadow-lg:   0 8px 48px rgba(0, 0, 0, 0.16);
  --csq-shadow-xl:   0 16px 64px rgba(0, 0, 0, 0.24);

  /* Transitions */
  --csq-transition:         all 0.3s ease;
  --csq-transition-slow:    all 0.6s ease;
  --csq-transition-fast:    all 0.15s ease;

  /* Header */
  --csq-header-height:      80px;

  /* Z-index scale */
  --z-header:   100;
  --z-overlay:  200;
  --z-modal:    300;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

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

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--csq-font-body);
}

/* ─── Typography ─── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--csq-font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--csq-dark);
}

h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.3rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--csq-space-sm);
  line-height: 1.75;
}

p:last-child {
  margin-bottom: 0;
}

code, pre {
  font-family: var(--csq-font-mono);
  font-size: 0.875rem;
}

/* ─── Layout: Container ─── */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--csq-space-md);
}

.container--wide {
  max-width: 1400px;
}

.container--narrow {
  max-width: 800px;
}

/* ─── Section Spacing ─── */
.csq-section {
  padding-block: var(--csq-space-3xl);
}

.csq-section--sm {
  padding-block: var(--csq-space-2xl);
}

.csq-section--lg {
  padding-block: 120px;
}

/* ─── Section Title ─── */
.csq-section-header {
  text-align: center;
  margin-bottom: var(--csq-space-2xl);
}

.csq-section-label {
  display: inline-block;
  font-family: var(--csq-font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--csq-primary);
  margin-bottom: var(--csq-space-sm);
}

.csq-section-title {
  font-family: var(--csq-font-heading);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--csq-dark);
  margin-bottom: var(--csq-space-sm);
}

.csq-section-title--white {
  color: var(--csq-white);
}

.csq-section-subtitle {
  font-size: 1.1rem;
  color: var(--csq-text-light);
  max-width: 640px;
  margin-inline: auto;
}

/* ─── Buttons ─── */
.csq-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--csq-radius-md);
  font-family: var(--csq-font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: var(--csq-transition);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  border: 2px solid transparent;
}

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

.csq-btn--primary:hover {
  background-color: var(--csq-primary-dark);
  border-color: var(--csq-primary-dark);
  color: var(--csq-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 139, 51, 0.35);
}

.csq-btn--outline {
  background-color: transparent;
  color: var(--csq-primary);
  border-color: var(--csq-primary);
}

.csq-btn--outline:hover {
  background-color: var(--csq-primary);
  color: var(--csq-white);
  transform: translateY(-2px);
}

.csq-btn--white {
  background-color: var(--csq-white);
  color: var(--csq-dark);
  border-color: var(--csq-white);
}

.csq-btn--white:hover {
  background-color: var(--csq-primary);
  color: var(--csq-white);
  border-color: var(--csq-primary);
  transform: translateY(-2px);
}

.csq-btn--outline-white {
  background-color: transparent;
  color: var(--csq-white);
  border-color: rgba(255, 255, 255, 0.6);
}

.csq-btn--outline-white:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: var(--csq-white);
  color: var(--csq-white);
}

.csq-btn--text {
  background: none;
  border: none;
  padding: 0;
  color: var(--csq-primary);
  font-weight: 600;
}

.csq-btn--text:hover {
  gap: 0.75rem;
  color: var(--csq-primary-dark);
}

.csq-btn--lg {
  padding: 1rem 2.5rem;
  font-size: 1.05rem;
}

.csq-btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* ─── Badge / Tag ─── */
.csq-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: rgba(255, 139, 51, 0.1);
  color: var(--csq-primary);
  border: 1px solid rgba(255, 139, 51, 0.25);
  border-radius: var(--csq-radius-full);
  font-family: var(--csq-font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.csq-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.9rem;
  background-color: var(--csq-primary);
  color: var(--csq-white);
  border-radius: var(--csq-radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ─── Page Hero (internal pages) ─── */
.csq-page-hero {
  padding: calc(var(--csq-header-height) + 80px) 0 80px;
  background: var(--csq-hero-bg);
  position: relative;
  overflow: hidden;
}

.csq-page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1a1a2e 0%, #3d3d3d 60%, rgba(255, 139, 51, 0.15) 100%);
  z-index: 0;
}

.csq-page-hero .container {
  position: relative;
  z-index: 1;
}

.csq-page-hero__title {
  color: var(--csq-white);
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  margin-bottom: var(--csq-space-sm);
}

.csq-page-hero__subtitle {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.15rem;
  max-width: 600px;
}

/* Gradient variant */
.csq-page-hero--gradient::before {
  background: linear-gradient(135deg, #111111 0%, #3d3d3d 50%, #1a1a2e 100%);
}

/* ─── Misc Utilities ─── */
.d-none { display: none !important; }
.d-flex { display: flex !important; }
.d-block { display: block !important; }

@media (min-width: 992px) {
  .d-lg-inline-flex { display: inline-flex !important; }
  .d-lg-none { display: none !important; }
}

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

/* ─── Back to Top ─── */
.csq-back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: var(--csq-primary);
  color: var(--csq-white);
  border-radius: var(--csq-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--csq-transition);
  z-index: 50;
  font-size: 1.25rem;
}

.csq-back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.csq-back-to-top:hover {
  background: var(--csq-primary-dark);
  color: var(--csq-white);
  transform: translateY(-3px);
}

/* ─── Animations / Keyframes ─── */
@keyframes csq-fade-up {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes csq-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes csq-slide-in-left {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes csq-marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-25%); }
}

@keyframes csq-pulse-ring {
  0%   { transform: scale(0.8); opacity: 1; }
  100% { transform: scale(2); opacity: 0; }
}

@keyframes csq-float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}

@keyframes csq-gradient-shift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ─── Post/Page Grids ─── */
.csq-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--csq-space-lg);
}

.csq-post-card {
  background: var(--csq-white);
  border-radius: var(--csq-radius-lg);
  overflow: hidden;
  box-shadow: var(--csq-shadow-md);
  transition: var(--csq-transition);
}

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

.csq-post-card__image-link img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: var(--csq-transition);
}

.csq-post-card:hover .csq-post-card__image-link img {
  transform: scale(1.05);
}

.csq-post-card__content {
  padding: var(--csq-space-md);
}

.csq-post-card__date {
  font-size: 0.8rem;
  color: var(--csq-mid-gray);
  font-family: var(--csq-font-mono);
  display: block;
  margin-bottom: 0.5rem;
}

.csq-post-card__title {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.csq-post-card__title a {
  color: var(--csq-dark);
}

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

.csq-post-card__excerpt {
  color: var(--csq-text-light);
  font-size: 0.9rem;
  margin-bottom: var(--csq-space-sm);
}

/* ─── 404 Page ─── */
.csq-404 {
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.csq-404__section {
  width: 100%;
  padding-block: var(--csq-space-3xl);
}

.csq-404__content {
  text-align: center;
  max-width: 540px;
  margin: 0 auto;
}

.csq-404__code {
  font-family: var(--csq-font-mono);
  font-size: clamp(5rem, 15vw, 9rem);
  font-weight: 700;
  color: var(--csq-primary);
  line-height: 1;
  margin-bottom: var(--csq-space-sm);
  opacity: 0.85;
}

.csq-404__title {
  font-size: 2rem;
  margin-bottom: var(--csq-space-sm);
}

.csq-404__text {
  color: var(--csq-text-light);
  margin-bottom: var(--csq-space-lg);
}

.csq-404__actions {
  display: flex;
  gap: var(--csq-space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── Pagination ─── */
.csq-pagination {
  margin-top: var(--csq-space-2xl);
  text-align: center;
}

.csq-pagination .nav-links {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
}

.csq-pagination .page-numbers {
  display: inline-flex;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--csq-radius-md);
  border: 1px solid var(--csq-light-border);
  color: var(--csq-text);
  font-weight: 600;
  transition: var(--csq-transition-fast);
}

.csq-pagination .page-numbers.current,
.csq-pagination .page-numbers:hover {
  background: var(--csq-primary);
  border-color: var(--csq-primary);
  color: var(--csq-white);
}

/* ─── Single Post ─── */
.csq-single__content {
  padding-block: var(--csq-space-2xl);
}

.csq-single__inner {
  max-width: 800px;
  margin-inline: auto;
}

.csq-article__thumbnail {
  border-radius: var(--csq-radius-lg);
  overflow: hidden;
  margin-bottom: var(--csq-space-lg);
}

.csq-article__thumbnail img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.csq-article__body {
  font-size: 1.05rem;
  line-height: 1.85;
}

.csq-article__body h2,
.csq-article__body h3,
.csq-article__body h4 {
  margin-top: var(--csq-space-lg);
  margin-bottom: var(--csq-space-sm);
}

.csq-article__footer {
  margin-top: var(--csq-space-2xl);
  padding-top: var(--csq-space-lg);
  border-top: 1px solid var(--csq-light-border);
}

/* ─── Responsive Breakpoints ─── */
@media (max-width: 1200px) {
  .container { padding-inline: var(--csq-space-lg); }
}

@media (max-width: 768px) {
  .csq-section { padding-block: var(--csq-space-2xl); }
  .csq-section--lg { padding-block: var(--csq-space-2xl); }
  .csq-page-hero { padding: calc(var(--csq-header-height) + 48px) 0 48px; }
  .csq-posts-grid { grid-template-columns: 1fr; }
}