/* ============================================================
   🐷 buu-rie blog — Style Sheet
   ============================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Primary palette */
  --pink-50:  #fff0f6;
  --pink-100: #ffdeeb;
  --pink-200: #fcc2d7;
  --pink-300: #faa2c1;
  --pink-400: #f783ac;
  --pink-500: #f06595;
  --pink-600: #e64980;

  /* Lavender accents */
  --lavender-50:  #f3f0ff;
  --lavender-100: #e5dbff;
  --lavender-200: #d0bfff;
  --lavender-300: #b197fc;
  --lavender-400: #9775fa;

  /* Warm neutrals */
  --cream:     #fffaf5;
  --warm-gray: #8b7e74;
  --dark-text: #4a3f35;
  --light-text:#6d6056;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #ffeef8 0%, #f3e8ff 50%, #e8f4fd 100%);
  --gradient-card-hover: linear-gradient(135deg, #fff0f6 0%, #f3f0ff 100%);
  --gradient-btn-active: linear-gradient(135deg, #f783ac 0%, #b197fc 100%);
  --gradient-modal-bg: linear-gradient(135deg, #fff5f9 0%, #f8f0ff 100%);

  /* Glass effect */
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.45);
  --glass-shadow: 0 8px 32px rgba(180, 120, 160, 0.12);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(180, 120, 160, 0.08);
  --shadow-md: 0 4px 20px rgba(180, 120, 160, 0.12);
  --shadow-lg: 0 12px 40px rgba(180, 120, 160, 0.18);
  --shadow-xl: 0 20px 60px rgba(180, 120, 160, 0.22);

  /* Radius */
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 36px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Typography */
  --font-main: 'Zen Maru Gothic', 'Hiragino Maru Gothic Pro', 'BIZ UDGothic', sans-serif;

  /* Layout */
  --max-width: 1200px;
  --header-height: 80px;
}

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

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

body {
  font-family: var(--font-main);
  color: var(--dark-text);
  background: var(--cream);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* --- Sakura Canvas (Background Particles) --- */
#sakura-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* --- Page Wrapper --- */
.page-wrapper {
  position: relative;
  z-index: 1;
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  background: var(--gradient-hero);
  padding: 80px 24px 60px;
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -30%;
  width: 160%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(247, 131, 172, 0.12) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 60%, rgba(177, 151, 252, 0.10) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 80%, rgba(255, 182, 193, 0.08) 0%, transparent 40%);
  animation: heroGlow 8s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes heroGlow {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(20px, -10px) scale(1.05); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  margin: 0 auto;
}

/* Character avatar */
.hero-avatar {
  position: relative;
  display: inline-block;
  margin-bottom: 28px;
}

.hero-avatar img {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  border: 5px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 8px 30px rgba(247, 131, 172, 0.25),
              0 0 0 12px rgba(247, 131, 172, 0.08);
  transition: var(--transition-smooth);
}

.hero-avatar img:hover {
  transform: scale(1.06) rotate(-3deg);
  box-shadow: 0 12px 40px rgba(247, 131, 172, 0.35),
              0 0 0 16px rgba(247, 131, 172, 0.12);
}

/* Floating sparkle dots around avatar */
.hero-avatar::before,
.hero-avatar::after {
  content: '✿';
  position: absolute;
  font-size: 20px;
  animation: sparkleFloat 3s ease-in-out infinite;
  color: var(--pink-300);
  opacity: 0.7;
}

.hero-avatar::before {
  top: 5px;
  right: -10px;
  animation-delay: 0s;
}

.hero-avatar::after {
  bottom: 10px;
  left: -10px;
  animation-delay: 1.5s;
  content: '❀';
  color: var(--lavender-300);
}

@keyframes sparkleFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.5; }
  50%      { transform: translateY(-8px) rotate(15deg); opacity: 1; }
}

/* Blog title */
.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--pink-500), var(--lavender-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  line-height: 1.3;
}

.hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--light-text);
  font-weight: 500;
  letter-spacing: 0.04em;
  opacity: 0.85;
}

/* Decorative wave divider */
.hero-wave {
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  overflow: hidden;
  line-height: 0;
}

.hero-wave svg {
  display: block;
  width: 100%;
  height: 60px;
}

/* ============================================================
   CATEGORY FILTER
   ============================================================ */
.filter-section {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 24px;
  background: rgba(255, 250, 245, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(247, 131, 172, 0.1);
  transition: var(--transition-smooth);
}

.filter-section.scrolled {
  box-shadow: 0 4px 20px rgba(180, 120, 160, 0.08);
}

.filter-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  max-width: var(--max-width);
  margin: 0 auto;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--light-text);
  background: var(--glass-bg);
  border: 2px solid transparent;
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.filter-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--gradient-btn-active);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: -1;
}

.filter-btn:hover {
  color: var(--pink-600);
  border-color: var(--pink-200);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.filter-btn.active {
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(247, 131, 172, 0.3);
  transform: translateY(-2px);
}

.filter-btn.active::before {
  opacity: 1;
}

/* Category emoji badges */
.filter-btn .emoji {
  margin-right: 4px;
  font-size: 1rem;
}

/* ============================================================
   POSTS GRID
   ============================================================ */
.posts-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
}

/* Empty state */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 20px;
  color: var(--light-text);
}

.empty-state-emoji {
  font-size: 4rem;
  margin-bottom: 16px;
  display: block;
  animation: emptyBounce 2s ease-in-out infinite;
}

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

.empty-state-text {
  font-size: 1.1rem;
  font-weight: 500;
}

/* ============================================================
   POST CARD
   ============================================================ */
.post-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-bounce),
              box-shadow var(--transition-smooth);
  cursor: pointer;
  opacity: 0;
  transform: translateY(40px);
  position: relative;
}

.post-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.post-card:hover {
  transform: translateY(-10px) scale(1.015);
  box-shadow: var(--shadow-lg);
}

.post-card:hover .post-card-image img {
  transform: scale(1.08);
}

.post-card:active {
  transform: translateY(-4px) scale(0.99);
}

/* Card image */
.post-card-image {
  position: relative;
  width: 100%;
  padding-top: 65%;
  overflow: hidden;
  background: var(--pink-50);
}

.post-card-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Category badge on card */
.post-card-category {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-btn-active);
  box-shadow: 0 4px 12px rgba(247, 131, 172, 0.3);
  backdrop-filter: blur(6px);
  z-index: 2;
  letter-spacing: 0.03em;
}

/* Card body */
.post-card-body {
  padding: 22px 24px 24px;
}

.post-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--dark-text);
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-comment {
  font-size: 0.9rem;
  color: var(--light-text);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

.post-card-date {
  font-size: 0.8rem;
  color: var(--warm-gray);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}

.post-card-date::before {
  content: '📅';
  font-size: 0.85rem;
}

/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(74, 63, 53, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--gradient-modal-bg);
  border-radius: var(--radius-xl);
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.5);
  transform: translateY(30px) scale(0.95);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

.modal-overlay.open .modal-content {
  transform: translateY(0) scale(1);
}

/* Custom scrollbar inside modal */
.modal-content::-webkit-scrollbar {
  width: 6px;
}

.modal-content::-webkit-scrollbar-track {
  background: transparent;
}

.modal-content::-webkit-scrollbar-thumb {
  background: var(--pink-200);
  border-radius: 3px;
}

/* Close button */
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--light-text);
  z-index: 10;
  transition: var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.modal-close:hover {
  background: var(--pink-100);
  color: var(--pink-600);
  transform: rotate(90deg) scale(1.1);
}

/* Modal image */
.modal-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

/* Modal body */
.modal-body {
  padding: 32px 32px 36px;
}

.modal-category {
  display: inline-block;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-btn-active);
  margin-bottom: 14px;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--dark-text);
  margin-bottom: 16px;
  line-height: 1.4;
}

.modal-comment {
  font-size: 1rem;
  color: var(--light-text);
  line-height: 1.9;
  margin-bottom: 20px;
}

.modal-date {
  font-size: 0.85rem;
  color: var(--warm-gray);
  display: flex;
  align-items: center;
  gap: 6px;
}

.modal-date::before {
  content: '📅';
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  text-align: center;
  padding: 40px 24px 48px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--pink-200), var(--lavender-200), transparent);
}

.footer-character {
  font-size: 2.5rem;
  margin-bottom: 12px;
  display: block;
  animation: footerBounce 3s ease-in-out infinite;
}

@keyframes footerBounce {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  25%      { transform: translateY(-5px) rotate(-3deg); }
  75%      { transform: translateY(-5px) rotate(3deg); }
}

.footer-message {
  font-size: 0.95rem;
  color: var(--light-text);
  margin-bottom: 8px;
  font-weight: 500;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--warm-gray);
  opacity: 0.7;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

/* Card entrance — applied via JS with stagger */
@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Sakura petal keyframes (CSS fallback, main animation via Canvas) */
@keyframes sakuraDrift {
  0%   { transform: translateY(-10vh) rotate(0deg); opacity: 0; }
  10%  { opacity: 0.8; }
  90%  { opacity: 0.6; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

/* ============================================================
   LOADING STATE
   ============================================================ */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  grid-column: 1 / -1;
}

.loading-dots {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.loading-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--pink-300);
  animation: loadingPulse 1.4s ease-in-out infinite;
}

.loading-dot:nth-child(2) { animation-delay: 0.2s; }
.loading-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes loadingPulse {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40%           { transform: scale(1); opacity: 1; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .posts-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 60px 20px 48px;
  }

  .hero-avatar img {
    width: 130px;
    height: 130px;
  }

  .posts-section {
    padding: 32px 16px 60px;
  }

  .posts-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .filter-container {
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 18px;
    font-size: 0.82rem;
  }

  .modal-body {
    padding: 24px 20px 28px;
  }

  .modal-title {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 48px 16px 40px;
  }

  .hero-avatar img {
    width: 110px;
    height: 110px;
  }

  .hero-title {
    font-size: 1.7rem;
  }

  .post-card-body {
    padding: 18px 18px 20px;
  }

  .filter-btn {
    padding: 7px 14px;
    font-size: 0.78rem;
  }
}

/* ============================================================
   ACCESSIBILITY — Reduced Motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  #sakura-canvas {
    display: none;
  }
}