/* ============================================================
   ZOMBIE APOCALYPSE — CSS OVERLAY
   Film grain · Scanlines · Vignette đỏ · Flicker · Blood drips
   ============================================================ */

/* ============================================================
   BODY: khi scene zombie active
   ============================================================ */
body.scene-zombie {
  background: #050203 !important;
}

body.scene-zombie::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: none;
  /* Vignette đỏ pulse */
  background:
    radial-gradient(ellipse at center, transparent 20%, rgba(80, 0, 0, 0.35) 70%, rgba(30, 0, 0, 0.75) 100%);
  animation: zombie-pulse 4s ease-in-out infinite;
}

@keyframes zombie-pulse {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 1; }
}

/* ============================================================
   FILM GRAIN + SCANLINES
   ============================================================ */
body.scene-zombie::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9001;
  pointer-events: none;
  opacity: 0.15;
  background:
    /* Scanlines */
    repeating-linear-gradient(
      0deg,
      rgba(0, 0, 0, 0.15) 0px,
      rgba(0, 0, 0, 0.15) 1px,
      transparent 1px,
      transparent 3px
    );
  animation: scanline-move 8s linear infinite;
  mix-blend-mode: multiply;
}

@keyframes scanline-move {
  0% { background-position: 0 0; }
  100% { background-position: 0 100px; }
}

/* ============================================================
   FILM GRAIN riêng — dùng element injected bởi JS
   ============================================================ */
.zombie-grain {
  position: fixed;
  inset: 0;
  z-index: 9002;
  pointer-events: none;
  opacity: 0.25;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.15 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size: 200px 200px;
  animation: grain-shift 0.4s steps(4) infinite;
}

@keyframes grain-shift {
  0%   { transform: translate(0, 0); }
  25%  { transform: translate(-2%, 1%); }
  50%  { transform: translate(1%, -2%); }
  75%  { transform: translate(-1%, 2%); }
  100% { transform: translate(2%, -1%); }
}

/* ============================================================
   BLOOD DRIPS từ trên cùng
   ============================================================ */
.zombie-blood-top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 200px;
  z-index: 9003;
  pointer-events: none;
  background:
    linear-gradient(180deg,
      rgba(120, 0, 0, 0.6) 0%,
      rgba(80, 0, 0, 0.3) 30%,
      rgba(60, 0, 0, 0.05) 60%,
      transparent 100%
    );
}

.zombie-blood-top::before,
.zombie-blood-top::after {
  content: '';
  position: absolute;
  top: 0;
  width: 3px;
  background: linear-gradient(180deg,
    rgba(120, 0, 0, 0.8) 0%,
    rgba(120, 0, 0, 0.4) 60%,
    rgba(120, 0, 0, 0) 100%
  );
  animation: drip 6s ease-in infinite;
}

.zombie-blood-top::before {
  left: 15%;
  height: 80px;
  animation-delay: 0s;
}

.zombie-blood-top::after {
  left: 72%;
  height: 120px;
  animation-delay: -3s;
}

@keyframes drip {
  0%   { transform: translateY(-100%); opacity: 0; }
  20%  { opacity: 1; }
  100% { transform: translateY(200px); opacity: 0; }
}

/* ============================================================
   WARNING TAPE — 2 dải chéo góc màn hình
   ============================================================ */
.zombie-tape {
  position: fixed;
  width: 300px;
  height: 24px;
  z-index: 9004;
  pointer-events: none;
  background: repeating-linear-gradient(
    45deg,
    #ffcc00 0px,
    #ffcc00 15px,
    #1a1a1a 15px,
    #1a1a1a 30px
  );
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.6);
  opacity: 0.85;
  font-family: system-ui, sans-serif;
  color: #1a1a1a;
  font-weight: 900;
  font-size: 12px;
  letter-spacing: 4px;
  text-align: center;
  line-height: 24px;
  text-shadow: 0 0 3px rgba(255, 255, 255, 0.3);
}

.zombie-tape.top-left {
  top: 80px;
  left: -80px;
  transform: rotate(-42deg);
}

.zombie-tape.bottom-right {
  bottom: 90px;
  right: -80px;
  transform: rotate(-42deg);
}

/* ============================================================
   SIREN GLOW — ánh sáng đỏ/xanh nhấp nháy ở góc
   ============================================================ */
.zombie-siren {
  position: fixed;
  width: 200px;
  height: 200px;
  z-index: 9005;
  pointer-events: none;
  border-radius: 50%;
  animation: siren-flash 2s ease-in-out infinite;
  mix-blend-mode: screen;
  opacity: 0.4;
}

.zombie-siren.left {
  top: 100px;
  left: -100px;
  background: radial-gradient(circle, rgba(255, 30, 30, 0.8) 0%, transparent 70%);
}

.zombie-siren.right {
  top: 100px;
  right: -100px;
  background: radial-gradient(circle, rgba(30, 80, 255, 0.8) 0%, transparent 70%);
  animation-delay: -1s;
}

@keyframes siren-flash {
  0%, 100% { opacity: 0.2; transform: scale(1); }
  50%      { opacity: 0.7; transform: scale(1.15); }
}

/* ============================================================
   FLICKER — toàn màn hình thỉnh thoảng chớp đen
   ============================================================ */
.zombie-flicker {
  position: fixed;
  inset: 0;
  z-index: 9006;
  pointer-events: none;
  background: #000;
  opacity: 0;
  animation: flicker 8s linear infinite;
}

@keyframes flicker {
  0%, 100%   { opacity: 0; }
  47%        { opacity: 0; }
  48%        { opacity: 0.15; }
  49%        { opacity: 0; }
  92%        { opacity: 0; }
  93%        { opacity: 0.25; }
  93.5%      { opacity: 0; }
  94%        { opacity: 0.1; }
  94.5%      { opacity: 0; }
}

/* ============================================================
   TEXT FLICKER — tiêu đề chớp như đèn hỏng
   ============================================================ */
body.scene-zombie .mk-hero .hero-title,
body.scene-zombie .hero-title {
  animation: title-flicker 5s linear infinite !important;
  text-shadow:
    0 0 20px rgba(255, 60, 30, 0.7),
    0 0 40px rgba(255, 30, 20, 0.4),
    2px 2px 0 rgba(120, 0, 0, 0.6) !important;
}

@keyframes title-flicker {
  0%, 100%      { opacity: 1; }
  18%           { opacity: 1; }
  19%           { opacity: 0.4; }
  20%           { opacity: 1; }
  62%           { opacity: 1; }
  63%           { opacity: 0.3; }
  63.5%         { opacity: 0.9; }
  64%           { opacity: 0.4; }
  64.5%         { opacity: 1; }
}

/* ============================================================
   SCROLL INDICATOR — đổi màu đỏ máu
   ============================================================ */
body.scene-zombie .scroll-indicator {
  color: #ff3030 !important;
  text-shadow: 0 0 10px rgba(255, 0, 0, 0.6);
}

body.scene-zombie .scroll-indicator .arrow {
  border-color: #ff3030 !important;
  box-shadow: 0 0 12px rgba(255, 0, 0, 0.5);
}

/* ============================================================
   TEXT khác — đổi màu đỏ máu
   ============================================================ */
body.scene-zombie .mk-section-title,
body.scene-zombie .hero-badge {
  text-shadow: 0 0 15px rgba(255, 40, 20, 0.6);
}

body.scene-zombie .mk-search,
body.scene-zombie .mk-select {
  border-color: rgba(180, 30, 30, 0.4) !important;
  box-shadow: 0 0 10px rgba(180, 0, 0, 0.2);
}

body.scene-zombie .mk-search:focus {
  border-color: #ff3030 !important;
  box-shadow: 0 0 0 4px rgba(255, 30, 30, 0.15) !important;
}

/* ============================================================
   NAVBAR — đổi tint đỏ
   ============================================================ */
body.scene-zombie .mk-nav {
  background: rgba(10, 2, 5, 0.85) !important;
  border-bottom-color: rgba(180, 30, 30, 0.3) !important;
}

/* ============================================================
   THEME CARD — viền đỏ khi hover
   ============================================================ */
body.scene-zombie .theme-card:hover {
  border-color: #ff3030 !important;
  box-shadow: 0 30px 80px rgba(255, 30, 30, 0.4) !important;
}

/* ============================================================
   CURSOR TRAIL đỏ máu
   ============================================================ */
body.scene-zombie .cursor-glow {
  background: radial-gradient(circle, rgba(255, 30, 20, 0.25) 0%, transparent 70%) !important;
  mix-blend-mode: screen !important;
}

/* ============================================================
   PARTICLE BACKGROUND cũ — ẩn nếu còn
   ============================================================ */
body.scene-zombie #bg-canvas {
  display: none !important;
}

/* ============================================================
   BUTTONS — đổi sang đỏ máu
   ============================================================ */
body.scene-zombie .btn-hero.primary,
body.scene-zombie .btn-modal.primary {
  background: linear-gradient(135deg, #8a1010, #d02020) !important;
  box-shadow: 0 10px 40px rgba(200, 30, 30, 0.5) !important;
}

body.scene-zombie .btn-hero.primary:hover,
body.scene-zombie .btn-modal.primary:hover {
  box-shadow: 0 20px 60px rgba(255, 50, 30, 0.7) !important;
}
/* ============================================================
   🩸 BLOOD DRIP TRÊN CHỮ TITLE
   ============================================================ */
body.scene-zombie .hero-title {
  position: relative;
}

/* Máu chảy từ chữ */
body.scene-zombie .hero-title::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    /* Drip 1 - từ chữ T */
    radial-gradient(ellipse 8px 40px at 8% 100%, rgba(140, 0, 0, 0.9) 0%, rgba(140, 0, 0, 0.6) 40%, transparent 100%),
    /* Drip 2 - từ chữ H */
    radial-gradient(ellipse 6px 60px at 22% 100%, rgba(120, 0, 0, 0.85) 0%, rgba(120, 0, 0, 0.5) 50%, transparent 100%),
    /* Drip 3 - từ giữa */
    radial-gradient(ellipse 10px 80px at 45% 100%, rgba(160, 0, 0, 0.9) 0%, rgba(160, 0, 0, 0.4) 60%, transparent 100%),
    /* Drip 4 */
    radial-gradient(ellipse 7px 50px at 68% 100%, rgba(140, 0, 0, 0.85) 0%, transparent 100%),
    /* Drip 5 - từ chữ E cuối */
    radial-gradient(ellipse 9px 70px at 88% 100%, rgba(120, 0, 0, 0.9) 0%, transparent 100%);
  filter: blur(0.5px);
  animation: blood-flow 5s ease-in infinite;
  z-index: -1;
}

@keyframes blood-flow {
  0%   { transform: translateY(-100%); opacity: 0; }
  15%  { opacity: 1; }
  50%  { transform: translateY(20%); opacity: 1; }
  80%  { transform: translateY(60%); opacity: 0.6; }
  100% { transform: translateY(100%); opacity: 0; }
}

/* Vệt máu chảy chậm hơn */
body.scene-zombie .hero-title::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 4px 100px at 33% 100%, rgba(100, 0, 0, 0.7) 0%, transparent 100%),
    radial-gradient(ellipse 5px 120px at 78% 100%, rgba(100, 0, 0, 0.7) 0%, transparent 100%);
  filter: blur(1.2px);
  animation: blood-flow-slow 8s ease-in infinite;
  z-index: -1;
}

@keyframes blood-flow-slow {
  0%   { transform: translateY(-100%); opacity: 0; }
  20%  { opacity: 1; }
  100% { transform: translateY(150%); opacity: 0; }
}

/* ============================================================
   🧟 ZOMBIE HAND — bàn tay vồ chữ
   ============================================================ */
.zombie-hand {
  position: fixed;
  width: 140px;
  height: 180px;
  z-index: 9007;
  pointer-events: none;
  opacity: 0;
  animation-fill-mode: forwards;
}

.zombie-hand.left-hand {
  top: 30%;
  left: -180px;
  animation: hand-grab-left 8s ease-in-out infinite;
  filter: drop-shadow(0 0 20px rgba(140, 0, 0, 0.7));
}

.zombie-hand.right-hand {
  top: 30%;
  right: -180px;
  animation: hand-grab-right 8s ease-in-out infinite;
  animation-delay: 1.5s;
  filter: drop-shadow(0 0 20px rgba(140, 0, 0, 0.7));
  transform: scaleX(-1);
}

@keyframes hand-grab-left {
  0%, 100% { transform: translateX(0) rotate(-15deg); opacity: 0; }
  20%      { opacity: 0.9; }
  45%      { transform: translateX(500px) rotate(-25deg); opacity: 1; }
  55%      { transform: translateX(520px) rotate(-20deg); opacity: 1; }
  75%      { transform: translateX(480px) rotate(-30deg); opacity: 0.9; }
  90%      { transform: translateX(0) rotate(-15deg); opacity: 0; }
}

@keyframes hand-grab-right {
  0%, 100% { transform: scaleX(-1) translateX(0) rotate(-15deg); opacity: 0; }
  20%      { opacity: 0.9; }
  45%      { transform: scaleX(-1) translateX(500px) rotate(-25deg); opacity: 1; }
  55%      { transform: scaleX(-1) translateX(520px) rotate(-20deg); opacity: 1; }
  75%      { transform: scaleX(-1) translateX(480px) rotate(-30deg); opacity: 0.9; }
  90%      { transform: scaleX(-1) translateX(0) rotate(-15deg); opacity: 0; }
}

/* ============================================================
   🧟 ZOMBIE CLIMBING — trèo từ dưới lên
   ============================================================ */
.zombie-climber {
  position: fixed;
  bottom: -180px;
  width: 100px;
  height: 180px;
  z-index: 9008;
  pointer-events: none;
  animation: climb-up 12s linear infinite;
  filter: drop-shadow(0 -10px 20px rgba(140, 0, 0, 0.5));
}

@keyframes climb-up {
  0%   { transform: translateY(0) rotate(-5deg); opacity: 0; }
  10%  { opacity: 0.9; }
  50%  { transform: translateY(-45vh) rotate(5deg); opacity: 1; }
  85%  { transform: translateY(-80vh) rotate(-3deg); opacity: 0.8; }
  100% { transform: translateY(-110vh) rotate(0deg); opacity: 0; }
}

/* Lắc lư khi trèo */
.zombie-climber.climb-sway {
  animation:
    climb-up 14s linear infinite,
    zombie-sway 2s ease-in-out infinite;
}

@keyframes zombie-sway {
  0%, 100% { margin-left: 0; }
  25%      { margin-left: -8px; }
  75%      { margin-left: 8px; }
}

/* ============================================================
   🎬 TITLE SHAKE — khi zombie vồ
   ============================================================ */
body.scene-zombie.attacked .hero-title {
  animation:
    title-flicker 5s linear infinite,
    title-shake 8s ease-in-out infinite !important;
}

@keyframes title-shake {
  0%, 100%   { transform: translate(0, 0) rotate(0); }
  44%        { transform: translate(0, 0) rotate(0); }
  46%        { transform: translate(-4px, 2px) rotate(-1.5deg); }
  48%        { transform: translate(5px, -3px) rotate(2deg); }
  50%        { transform: translate(-3px, 1px) rotate(-1deg); }
  52%        { transform: translate(2px, -1px) rotate(0.5deg); }
  54%        { transform: translate(0, 0) rotate(0); }
}

/* ============================================================
   HỖ TRỢ — ZOMBIE EYE GLOW
   ============================================================ */
body.scene-zombie .hero-title .blood-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  filter: blur(30px);
  background: radial-gradient(ellipse at center, rgba(255, 30, 20, 0.6) 0%, transparent 60%);
  animation: blood-pulse 3s ease-in-out infinite;
}

@keyframes blood-pulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50%      { opacity: 0.8; transform: scale(1.1); }
}