/* 90s Risograph (Riso) Design System & Stylesheet */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=Space+Mono:ital,wght@0,400;0,700;1,400&family=Rubik+Mono+One&family=Syne:wght@700;800&display=swap');

:root {
  /* Color Palette (Traditional Risograph Inks) */
  --paper-bg: #FAF6EE;       /* Warm Munken cream paper */
  --ink-black: #1E1C1A;      /* Rich charcoal black soy ink, not digital black */
  --riso-pink: #FF358B;      /* Fluorescent Pink */
  --riso-blue: #1B3BF5;      /* Federal Blue */
  --riso-teal: #00B894;      /* Green/Teal ink */
  --riso-yellow: #FED330;    /* Sunflower Yellow */

  /* Shadows mimicking ink misregistration */
  --drift-pink: -3px -3px 0 var(--riso-pink);
  --drift-blue: 3px 3px 0 var(--riso-blue);
  --drift-both: -3px -3px 0 var(--riso-pink), 3px 3px 0 var(--riso-blue);
  
  /* Borders */
  --border-thick: 3px solid var(--ink-black);
  --border-thin: 2px solid var(--ink-black);
  
  /* Fonts */
  --font-body: 'Space Grotesk', sans-serif;
  --font-mono: 'Space Mono', monospace;
  --font-display: 'Syne', sans-serif;
  --font-heavy: 'Rubik Mono One', sans-serif;
}

/* Reset and Core Layout */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--paper-bg);
  color: var(--ink-black);
  font-family: var(--font-body);
  line-height: 1.6;
  font-size: 1.1rem;
  padding: 2rem 1rem;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* --- Risograph Ink Texture Overlay --- */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  opacity: 0.055;
  z-index: 9999;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Halftone Pattern Accent Blocks */
.halftone-accent {
  background-image: radial-gradient(var(--ink-black) 15%, transparent 16%);
  background-size: 8px 8px;
  opacity: 0.12;
  height: 20px;
  width: 100%;
  border-top: var(--border-thin);
  border-bottom: var(--border-thin);
  margin: 1.5rem 0;
}

/* Selection highlight */
::selection {
  background-color: var(--riso-pink);
  color: white;
}

/* Headers and Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

h1 {
  font-family: var(--font-heavy);
  font-size: clamp(2rem, 5vw, 3.5rem);
  text-shadow: var(--drift-both);
  color: var(--ink-black);
  margin-bottom: 1.5rem;
  line-height: 1.0;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  color: var(--riso-blue);
  border-bottom: var(--border-thick);
  padding-bottom: 0.3rem;
  margin-top: 2rem;
  position: relative;
}

h3 {
  font-size: 1.4rem;
  color: var(--riso-pink);
  margin-top: 1.5rem;
}

a {
  color: var(--riso-blue);
  text-decoration: none;
  font-weight: 700;
  transition: all 0.1s ease;
  position: relative;
}

a:hover {
  color: var(--riso-pink);
  background-color: var(--riso-yellow);
}

/* --- Layout Components --- */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* 90s Style Folder / Panel Header */
header {
  border: var(--border-thick);
  background: var(--paper-bg);
  box-shadow: 8px 8px 0 var(--ink-black);
  margin-bottom: 3rem;
  position: relative;
}

.header-topbar {
  background-color: var(--ink-black);
  color: var(--paper-bg);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.4rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 1px solid var(--paper-bg);
}
.window-dot:nth-child(1) { background-color: var(--riso-pink); }
.window-dot:nth-child(2) { background-color: var(--riso-yellow); }
.window-dot:nth-child(3) { background-color: var(--riso-teal); }

.header-body {
  padding: 2.5rem 2rem;
  text-align: center;
  border-bottom: var(--border-thick);
}

.header-tagline {
  font-family: var(--font-mono);
  font-weight: bold;
  background-color: var(--riso-yellow);
  display: inline-block;
  padding: 0.2rem 0.8rem;
  border: var(--border-thin);
  transform: rotate(-1deg);
  margin-top: 0.5rem;
}

nav {
  display: flex;
  border-top: none;
  background: var(--paper-bg);
  font-family: var(--font-mono);
}

.nav-link {
  flex: 1;
  text-align: center;
  padding: 1rem;
  font-weight: 700;
  border-right: var(--border-thick);
  text-transform: uppercase;
  color: var(--ink-black);
}

.nav-link:last-child {
  border-right: none;
}

.nav-link:hover, .nav-link.active {
  background-color: var(--riso-pink);
  color: white;
  transform: none;
}

/* --- Card Grids & Posts Feed --- */
.posts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

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

.post-card {
  border: var(--border-thick);
  background-color: var(--paper-bg);
  box-shadow: 6px 6px 0 var(--ink-black);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.15s ease;
  position: relative;
  overflow: hidden;
}

.post-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 24px 24px 0;
  border-color: transparent var(--ink-black) transparent transparent;
  transition: border-color 0.15s ease;
}

.post-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 10px 10px 0 var(--riso-pink);
}

.post-card:hover::before {
  border-color: transparent var(--riso-teal) transparent transparent;
}

.post-meta {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-black);
  margin-bottom: 0.8rem;
  display: flex;
  gap: 1rem;
}

.post-date {
  font-weight: 700;
  color: var(--riso-blue);
}

.post-card-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: 0.8rem;
  line-height: 1.2;
}

.post-card-title a {
  color: var(--ink-black);
}

.post-card-title a:hover {
  color: var(--riso-pink);
  background: none;
}

.post-description {
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border: var(--border-thin);
  background-color: var(--paper-bg);
  text-transform: uppercase;
  box-shadow: 2px 2px 0 var(--ink-black);
}

.badge-pink { background-color: #FFAEC9; color: var(--ink-black); }
.badge-blue { background-color: #B5E2FF; color: var(--ink-black); }
.badge-yellow { background-color: #FFF2A3; color: var(--ink-black); }
.badge-teal { background-color: #B5F1D7; color: var(--ink-black); }

/* --- Single Post Detail Layout --- */
.post-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 3px dashed var(--ink-black);
}

.post-header-meta {
  font-family: var(--font-mono);
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-weight: 700;
}

.post-content {
  margin-bottom: 3rem;
}

.post-content p {
  margin-bottom: 1.5rem;
}

.post-content ul, .post-content ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

.post-content li {
  margin-bottom: 0.5rem;
}

.post-content blockquote {
  border-left: 6px solid var(--riso-pink);
  background-color: var(--paper-bg);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  font-style: italic;
  border-top: var(--border-thin);
  border-right: var(--border-thin);
  border-bottom: var(--border-thin);
  box-shadow: 4px 4px 0 var(--ink-black);
}

.post-content pre {
  background-color: var(--ink-black);
  color: var(--paper-bg);
  padding: 1.2rem;
  overflow-x: auto;
  border: var(--border-thick);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  box-shadow: 4px 4px 0 var(--riso-blue);
  margin: 1.5rem 0;
}

.post-content code:not(pre code) {
  background-color: #ECE5D8;
  padding: 0.1rem 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 3px;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border: var(--border-thick);
  box-shadow: 6px 6px 0 var(--riso-pink);
  margin: 2rem 0;
  display: block;
}

/* --- Buttons and Navigation Links --- */
.btn {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.6rem 1.2rem;
  border: var(--border-thick);
  background-color: var(--riso-yellow);
  color: var(--ink-black);
  box-shadow: 4px 4px 0 var(--ink-black);
  cursor: pointer;
  transition: all 0.1s ease;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--riso-pink);
  background-color: var(--paper-bg);
}

.btn:active {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 var(--ink-black);
}

/* Retro back link */
.back-link {
  font-family: var(--font-mono);
  display: inline-flex;
  align-items: center;
  margin-bottom: 2rem;
  font-weight: 700;
  text-transform: uppercase;
  gap: 0.5rem;
}

.back-link::before {
  content: "←";
  font-size: 1.2rem;
}

/* --- Footer --- */
footer {
  text-align: center;
  padding: 2.5rem 0;
  margin-top: 4rem;
  border-top: var(--border-thick);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  position: relative;
}

.footer-credits {
  display: inline-block;
  padding: 0.3rem 1rem;
  border: var(--border-thin);
  background-color: var(--paper-bg);
  box-shadow: 3px 3px 0 var(--riso-teal);
  transform: rotate(0.5deg);
}

/* Simple animations */
@keyframes wobble {
  0% { transform: rotate(0deg); }
  50% { transform: rotate(1deg); }
  100% { transform: rotate(0deg); }
}

.wobble-hover:hover {
  animation: wobble 0.3s ease infinite;
}