@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Serif:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  /* ---- цвета ---- */
  --navy:        #16212c;
  --navy-soft:    #1f2e3c;
  --steel:       #3d7ea6;
  --amber:       #d4a017;
  --page-bg:     #eef1f4;
  --card-bg:     #ffffff;
  --line:        #dbe1e7;
  --text:        #1f2933;
  --text-muted:  #5b6b7a;
  --text-inverse:#dfe7ee;
  --text-inverse-muted: #8aa4b8;

  /* ---- типографика ---- */
  --font-display: 'IBM Plex Serif', Georgia, serif;
  --font-body:    'IBM Plex Sans', -apple-system, Segoe UI, sans-serif;
  --font-mono:    'IBM Plex Mono', Consolas, monospace;

  --sidebar-w: 300px;
}

*{ box-sizing: border-box; }

[hidden]{ display: none !important; }

html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--page-bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
}

a{ color: var(--steel); text-decoration: none; }
a:hover{ text-decoration: underline; }

.icon{
  width: 18px; height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
  vertical-align: -4px;
}

/* ===================== SIDEBAR ===================== */
.sidebar{
  position: fixed;
  top:0; left:0; bottom:0;
  width: var(--sidebar-w);
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: var(--text-inverse);
  padding: 32px 24px 20px;
  display: flex;
  flex-direction: column;
  border-right: 3px solid var(--amber);
  overflow-y: auto;
}

.sidebar-logo-block{
  text-align: center;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-logo{
  max-width: 120px;
  max-height: 120px;
  width: auto;
  border-radius: 10px;
  margin-bottom: 14px;
}

.sidebar-title{
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.25;
  margin: 0;
  letter-spacing: 0.2px;
}
.sidebar-title span{
  display: block;
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 400;
  letter-spacing: 2.5px;
  color: var(--amber);
  text-transform: uppercase;
  margin-top: 4px;
}

.sidebar-about{
  font-size: 13.5px;
  color: var(--text-inverse-muted);
  padding: 18px 2px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-align: center;
}

.sidebar-image-block{
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-image{
  width: 100%;
  border-radius: 8px;
  display: block;
  border: 1px solid rgba(255,255,255,0.1);
}

.sidebar-nav{
  padding: 14px 0 6px;
}
.sidebar-nav-link{
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-inverse);
  font-size: 14px;
  font-weight: 500;
  padding: 9px 10px;
  border-radius: 6px;
  transition: background 0.15s ease;
}
.sidebar-nav-link:hover{
  background: rgba(255,255,255,0.06);
  text-decoration: none;
}

.sidebar-status{
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-inverse-muted);
}
.status-row{ padding: 2px 0; }
.status-row b{ color: var(--text-inverse); font-weight: 500; }
.status-dot{
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #4caf6f;
  box-shadow: 0 0 6px #4caf6f;
  margin-right: 4px;
}

/* ===================== MAIN CONTENT ===================== */
.content{
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar{
  padding: 30px 40px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--page-bg);
  position: sticky;
  top: 0;
  z-index: 5;
}

.back-btn{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  color: var(--steel);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 14px;
  transition: border-color 0.15s ease, transform 0.1s ease;
}
.back-btn:hover{
  border-color: var(--steel);
  transform: translateX(-2px);
}

.topbar-title h2{
  font-family: var(--font-display);
  font-size: 26px;
  margin: 0;
}
.topbar-sub{
  margin: 4px 0 0;
  color: var(--text-muted);
  font-size: 13.5px;
}

/* ===================== FEED ===================== */
.feed-toolbar{
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 24px 40px 0;
}

.feed-search{
  flex: 1;
  min-width: 220px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text);
  font: inherit;
}

.feed-sort-btn{
  border: 1px solid var(--line);
  background: var(--card-bg);
  color: var(--steel);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  font: inherit;
  white-space: nowrap;
}

.feed-sort-btn:hover{
  border-color: var(--steel);
}

.feed{
  padding: 20px 40px 10px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feed-empty{
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  background: var(--card-bg);
  border: 1px dashed var(--line);
  border-radius: 8px;
}

.article-card{
  display: flex;
  gap: 18px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-left: 4px solid var(--steel);
  border-radius: 8px;
  padding: 18px 22px;
  cursor: pointer;
  transition: box-shadow 0.15s ease, border-left-color 0.15s ease, transform 0.1s ease;
}
.article-card:hover{
  box-shadow: 0 4px 16px rgba(22,33,44,0.08);
  border-left-color: var(--amber);
  transform: translateY(-1px);
}

.article-card-icon{
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 8px;
  background: var(--navy);
  color: var(--amber);
  display: flex;
  align-items: center;
  justify-content: center;
}
.article-card-icon .icon{ width: 22px; height: 22px; }

.article-card-body{ flex: 1; min-width: 0; }

.article-card-meta{
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 6px;
}
.article-card-meta .tag{
  color: var(--steel);
  font-weight: 500;
}
.article-card-meta .badge-new{
  background: var(--amber);
  color: #23262b;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 3px;
  letter-spacing: 0.5px;
}

.article-card h3{
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0 0 6px;
}

.article-card p{
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}

/* ===================== ARTICLE VIEW ===================== */
.article-view{
  padding: 28px 40px 60px;
  max-width: 100%;
  width: 100%;
}

.article-view h1{
  font-family: var(--font-display);
  font-size: 30px;
  margin: 0 0 10px;
}

.article-view .article-meta{
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 24px;
  display: flex;
  gap: 14px;
}

.article-view .article-body{
  font-size: 15.5px;
}
.article-view .article-body p{ margin: 0 0 16px; }
.article-view .article-body h2{
  font-family: var(--font-display);
  font-size: 21px;
  margin: 28px 0 12px;
}
.article-view .article-body blockquote{
  border-left: 3px solid var(--amber);
  margin: 20px 0;
  padding: 4px 18px;
  color: var(--text-muted);
  font-style: italic;
}

.article-view .article-body img{
  display: block;
  max-width: min(100%, 420px);
  max-height: 320px;
  width: auto;
  height: auto;
  margin: 20px auto;
  border-radius: 10px;
  border: 1px solid var(--line);
  object-fit: contain;
  box-shadow: 0 8px 24px rgba(22, 33, 44, 0.08);
}

.article-reaction{
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
}

.dislike-btn{
  border: 1px solid #a33a3a;
  background: #fff4f4;
  color: #8f2020;
  border-radius: 6px;
  padding: 8px 13px;
  font: inherit;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.dislike-btn:hover{
  background: #8f2020;
  color: #fff;
  transform: translateY(-1px);
}

body.hell-mode{
  overflow-x: hidden;
  background: #18000b;
}
body.hell-mode .content{
  animation: hell-screen-shake 0.18s steps(2, end) infinite;
}
body.hell-mode::before,
body.hell-mode::after{
  content: "";
  position: fixed;
  inset: -20%;
  pointer-events: none;
  z-index: 20;
}
body.hell-mode::before{
  background: repeating-linear-gradient(125deg, rgba(255, 0, 52, 0.1) 0 3px, transparent 3px 23px),
              radial-gradient(circle, transparent 20%, rgba(255, 0, 0, 0.26) 100%);
  mix-blend-mode: screen;
  animation: hell-flash 0.55s steps(2, end) infinite;
}
body.hell-mode::after{
  border: 28px solid rgba(95, 0, 20, 0.75);
  box-shadow: inset 0 0 90px 35px #ff003c;
  animation: hell-frame 1.8s ease-in-out infinite alternate;
}
body.hell-mode .sidebar,
body.hell-mode .topbar,
body.hell-mode .article-body > *,
body.hell-mode .site-footer{
  animation: hell-break-apart 2.8s cubic-bezier(.15,.8,.25,1) forwards;
}
body.hell-mode .sidebar{ animation-delay: 0.05s; }
body.hell-mode .topbar{ animation-delay: 0.15s; }
body.hell-mode .article-body > *:nth-child(odd){ animation-delay: 0.25s; }
body.hell-mode .article-body > *:nth-child(even){ animation-delay: 0.4s; }
body.hell-mode .site-footer{ animation-delay: 0.55s; }

.hell-message{
  position: fixed;
  z-index: 30;
  top: 50%;
  left: 50%;
  width: min(90vw, 760px);
  transform: translate(-50%, -50%) rotate(-2deg);
  color: #fff;
  text-align: center;
  font-family: var(--font-mono);
  font-size: clamp(20px, 4vw, 42px);
  font-weight: 500;
  letter-spacing: 1px;
  text-shadow: 0 0 5px #fff, 0 0 18px #ff003c, 4px 4px 0 #35000d;
  opacity: 0;
  animation: hell-message-in 0.01s step-end 2s forwards, hell-glitch 0.7s steps(2, end) 2s infinite;
}

@keyframes hell-screen-shake{
  0%{ transform: translate(0, 0) rotate(0); }
  50%{ transform: translate(2px, -1px) rotate(0.25deg); }
  100%{ transform: translate(-2px, 1px) rotate(-0.25deg); }
}
@keyframes hell-flash{
  0%, 100%{ opacity: 0.35; transform: rotate(0deg) scale(1); }
  50%{ opacity: 0.85; transform: rotate(2deg) scale(1.04); }
}
@keyframes hell-frame{
  from{ transform: rotate(-1deg) scale(1); opacity: 0.65; }
  to{ transform: rotate(1deg) scale(1.05); opacity: 1; }
}
@keyframes hell-break-apart{
  0%{ transform: translate(0, 0) rotate(0) skew(0); filter: none; opacity: 1; }
  35%{ transform: translate(0, 0) rotate(2deg) skew(3deg); filter: hue-rotate(100deg) contrast(1.5); opacity: 1; }
  100%{ transform: translate(var(--break-x, 18vw), var(--break-y, -30vh)) rotate(42deg) skew(18deg); filter: blur(5px) hue-rotate(280deg); opacity: 0; }
}
@keyframes hell-message-in{
  0%{ opacity: 0; transform: translate(-50%, -50%) scale(0.4) rotate(-8deg); }
  35%{ opacity: 0.15; }
  100%{ opacity: 1; transform: translate(-50%, -50%) scale(1) rotate(-2deg); }
}
@keyframes hell-glitch{
  0%, 100%{ transform: translate(-50%, -50%) rotate(-2deg) skew(0); filter: none; }
  12%{ transform: translate(calc(-50% - 8px), -50%) rotate(-2deg) skew(-8deg); filter: drop-shadow(8px 0 #00ffff) drop-shadow(-8px 0 #ff003c); }
  14%{ transform: translate(calc(-50% + 5px), -50%) rotate(1deg) skew(10deg); filter: hue-rotate(90deg) drop-shadow(-5px 0 #00ffff); }
  35%{ transform: translate(-50%, calc(-50% + 3px)) rotate(-3deg); filter: drop-shadow(4px 0 #ff003c); }
  37%{ transform: translate(-50%, -50%) rotate(-2deg); filter: none; }
  70%{ transform: translate(calc(-50% - 3px), -50%) rotate(-1deg) skew(4deg); filter: hue-rotate(180deg); }
}

@media (prefers-reduced-motion: reduce){
  body.hell-mode .content,
  body.hell-mode::before,
  body.hell-mode::after,
  body.hell-mode .sidebar,
  body.hell-mode .topbar,
  body.hell-mode .article-body > *,
  body.hell-mode .site-footer,
  .hell-message{
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}


/* ===================== FOOTER ===================== */
.site-footer{
  margin-top: auto;
  padding: 18px 40px 30px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  gap: 8px;
}
.dot{ opacity: 0.5; }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 860px){
  .sidebar{
    position: static;
    width: 100%;
    border-right: none;
    border-bottom: 3px solid var(--amber);
  }
  .content{ margin-left: 0; }
  .topbar, .feed-toolbar, .feed, .article-view{ padding-left: 20px; padding-right: 20px; }
  .article-reaction{ align-items: flex-start; flex-direction: column; }
}

/* фокус для доступности */
a:focus-visible, button:focus-visible, .article-card:focus-visible{
  outline: 2px solid var(--steel);
  outline-offset: 2px;
}