/* ==========================================================================
   Uliunai.com Hub — Styles
   Split-screen game chooser: KF1 vs KF2
   ========================================================================== */

/* ── CSS Custom Properties ─────────────────────────────────────────────── */
:root {
  /* Fonts */
  --font-heading: 'Orbitron', monospace;
  --font-body: 'Rajdhani', sans-serif;

  /* Brand Colors */
  --color-blood-red: #8B0000;
  --color-dark-red: #4A0000;
  --color-horror-gray: #1a1a1a;
  --color-black: #000000;

  /* Red Scale */
  --color-red-500: #ef4444;
  --color-red-600: #dc2626;
  --color-red-700: #b91c1c;
  --color-red-900: #7f1d1d;

  /* Text Colors */
  --color-text-primary: rgba(255, 255, 255, 0.87);
  --color-text-secondary: #9ca3af;
  --color-text-muted: #4b5563;

  /* Gradients */
  --gradient-blood: linear-gradient(135deg, #8B0000 0%, #4A0000 100%);
  --gradient-dark: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);

  /* Shadows */
  --shadow-red-glow: 0 0 20px rgba(220, 38, 38, 0.3);
  --shadow-blood: 0 4px 20px rgba(139, 0, 0, 0.4);

  /* Scrollbar */
  --scrollbar-width: 8px;
  --scrollbar-track: #1a1a1a;
  --scrollbar-thumb: #dc2626;
  --scrollbar-thumb-hover: #b91c1c;

  /* Focus */
  --focus-outline: 2px solid #dc2626;
  --focus-offset: 2px;

  /* Selection */
  --selection-bg: #dc2626;
  --selection-color: #ffffff;

  /* Animation Durations */
  --duration-pulse-slow: 3s;
  --duration-bounce-slow: 2s;
  --duration-glitch: 1s;

  /* Layout */
  --panel-transition-duration: 0.8s;
  --panel-hover-flex: 1.3;
  --panel-shrink-flex: 0.7;
  --panel-default-flex: 1;

  /* Base Styles */
  font-family: var(--font-body);
  line-height: 1.5;
  font-weight: 400;
  color-scheme: dark;
  color: var(--color-text-primary);
  background-color: var(--color-black);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

html {
  scroll-behavior: smooth;
}

body {
  overflow: hidden;
  width: 100%;
  height: 100dvh;
  background-color: var(--color-black);
}

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

/* ── Scrollbar ─────────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: var(--scrollbar-width, 8px);
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track, #1a1a1a);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb, #dc2626);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover, #b91c1c);
}

/* ── Selection ─────────────────────────────────────────────────────────── */
::selection {
  background-color: var(--selection-bg, #dc2626);
  color: var(--selection-color, #ffffff);
}

/* ── Ember Particles ──────────────────────────────────────────────────── */
#ember-container {
  position: fixed;
  inset: 0;
  z-index: 8;
  pointer-events: none;
  overflow: hidden;
}

.ember {
  position: absolute;
  bottom: -10px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(220, 38, 38, 0.9) 0%, rgba(139, 0, 0, 0.4) 100%);
}

@keyframes float-up {
  0% {
    transform: translateY(0) scale(1);
    opacity: var(--ember-opacity, 0.6);
  }
  100% {
    transform: translateY(-100vh) scale(0.3);
    opacity: 0;
  }
}

@keyframes float-up-sway {
  0% {
    transform: translateY(0) translateX(0) scale(1);
    opacity: var(--ember-opacity, 0.6);
  }
  50% {
    transform: translateY(-50vh) translateX(30px) scale(0.6);
  }
  100% {
    transform: translateY(-100vh) translateX(-10px) scale(0.3);
    opacity: 0;
  }
}

/* ── Split-Screen Layout ───────────────────────────────────────────────── */
.split-container {
  display: flex;
  width: 100%;
  height: 100dvh;
  position: relative;
}

.game-panel {
  flex: var(--panel-default-flex);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: flex var(--panel-transition-duration) cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Hover states via container classes */
.split-container.hover-kf1 .game-panel--kf1 {
  flex: var(--panel-hover-flex);
}

.split-container.hover-kf1 .game-panel--kf2 {
  flex: var(--panel-shrink-flex);
}

.split-container.hover-kf2 .game-panel--kf2 {
  flex: var(--panel-hover-flex);
}

.split-container.hover-kf2 .game-panel--kf1 {
  flex: var(--panel-shrink-flex);
}

/* ── Background Images ─────────────────────────────────────────────────── */
.game-panel__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.08);
  transition: transform calc(var(--panel-transition-duration) * 1.5) cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* KF1 background with gradient fallback */
.game-panel--kf1 .game-panel__bg {
  background: linear-gradient(135deg, #1a0000 0%, #3d0000 30%, #0a0a0a 70%, #000 100%);
  background-image: url('assets/kf1.jpg');
  background-size: cover;
  background-position: center;
}

/* KF2 background with gradient fallback */
.game-panel--kf2 .game-panel__bg {
  background: linear-gradient(225deg, #0a0a1a 0%, #1a0505 30%, #0d0d0d 70%, #000 100%);
  background-image: url('assets/kf2.png');
  background-size: cover;
  background-position: center;
}

/* Mobile card backgrounds */
.mobile-card--kf1 .game-panel__bg {
  background: linear-gradient(135deg, #1a0000 0%, #3d0000 30%, #0a0a0a 70%, #000 100%);
  background-image: url('assets/kf1.jpg');
  background-size: cover;
  background-position: center;
}

.mobile-card--kf2 .game-panel__bg {
  background: linear-gradient(225deg, #0a0a1a 0%, #1a0505 30%, #0d0d0d 70%, #000 100%);
  background-image: url('assets/kf2.png');
  background-size: cover;
  background-position: center;
}

/* Background zoom on hover — tied to container class, not CSS :hover */
.split-container.hover-kf1 .game-panel--kf1 .game-panel__bg,
.split-container.hover-kf2 .game-panel--kf2 .game-panel__bg,
.game-panel:focus-visible .game-panel__bg {
  transform: scale(1.15);
}

/* KF2 desaturation for coming soon */
.game-panel--kf2 .game-panel__bg,
.mobile-card--kf2 .game-panel__bg {
  filter: grayscale(40%) brightness(0.7);
}

/* ── Overlay Gradients ─────────────────────────────────────────────────── */
.game-panel__overlay {
  position: absolute;
  inset: 0;
  transition: opacity var(--panel-transition-duration) ease;
}

/* KF1: darken overall + heavy fade to black on right edge for seamless center blend */
.game-panel--kf1 .game-panel__overlay {
  background:
    linear-gradient(to right, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.45) 50%, rgba(0, 0, 0, 0.85) 92%, rgba(0, 0, 0, 0.9) 100%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.35) 35%, rgba(0, 0, 0, 0.65) 100%);
}

/* KF2: darken overall + heavy fade to black on left edge for seamless center blend */
.game-panel--kf2 .game-panel__overlay {
  background:
    linear-gradient(to left, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.45) 50%, rgba(0, 0, 0, 0.85) 92%, rgba(0, 0, 0, 0.9) 100%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.35) 35%, rgba(0, 0, 0, 0.65) 100%);
}

/* On hover: lighten the active panel */
.split-container.hover-kf1 .game-panel--kf1 .game-panel__overlay,
.split-container.hover-kf2 .game-panel--kf2 .game-panel__overlay,
.game-panel:focus-visible .game-panel__overlay {
  opacity: 0.85;
}

/* Darken the inactive panel */
.game-panel--kf1::after,
.game-panel--kf2::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--panel-transition-duration) cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.split-container.hover-kf2 .game-panel--kf1::after,
.split-container.hover-kf1 .game-panel--kf2::after {
  opacity: 1;
}

/* ── Panel Content ─────────────────────────────────────────────────────── */
.game-panel__content {
  position: relative;
  z-index: 6;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2rem;
}

.game-panel__icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient-blood);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-red-glow);
  font-size: 2rem;
  color: #fff;
  margin-bottom: 0.5rem;
}

.game-panel__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.1;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.9), 0 0 40px rgba(0, 0, 0, 0.6);
}

.game-panel__subtitle {
  font-family: var(--font-heading);
  font-size: clamp(0.875rem, 1.5vw, 1.125rem);
  font-weight: 400;
  color: var(--color-red-500);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.9), 0 0 20px rgba(0, 0, 0, 0.5);
}

.game-panel__description {
  font-family: var(--font-body);
  font-size: clamp(0.875rem, 1.2vw, 1.125rem);
  font-weight: 400;
  color: var(--color-text-secondary);
  max-width: 320px;
  line-height: 1.6;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.9), 0 0 15px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease 0.4s, transform 0.4s ease 0.4s;
}

.split-container.hover-kf1 .game-panel--kf1 .game-panel__description,
.split-container.hover-kf2 .game-panel--kf2 .game-panel__description,
.game-panel:focus-visible .game-panel__description {
  opacity: 1;
  transform: translateY(0);
}

/* ── CTA Buttons ───────────────────────────────────────────────────────── */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #fff;
  background-color: var(--color-red-600);
  border: 2px solid var(--color-red-600);
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
  box-shadow: var(--shadow-blood);
}

.cta-button:hover {
  background-color: var(--color-red-700);
  box-shadow: var(--shadow-red-glow);
  transform: translateY(-2px);
}

.cta-button--disabled {
  background-color: transparent;
  border-color: var(--color-text-muted);
  color: var(--color-text-muted);
  cursor: not-allowed;
  box-shadow: none;
}

.cta-button--disabled:hover {
  background-color: transparent;
  box-shadow: none;
  transform: none;
}

/* ── Center Divider ────────────────────────────────────────────────────── */
.split-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  pointer-events: none;
  transition: left var(--panel-transition-duration) cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.split-container.hover-kf1 .split-divider {
  left: 65%;
}

.split-container.hover-kf2 .split-divider {
  left: 35%;
}

.split-divider__line {
  flex: 1;
  width: 1px;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(220, 38, 38, 0.3) 30%,
    rgba(220, 38, 38, 0.15) 70%,
    transparent 100%
  );
}

.split-divider__text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--color-red-500);
  background-color: rgba(0, 0, 0, 0.8);
  padding: 0.75rem 0.5rem;
  letter-spacing: 0.1em;
  text-shadow: 0 0 10px rgba(220, 38, 38, 0.5);
}

/* ── Coming Soon Overlay ───────────────────────────────────────────────── */
.coming-soon-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 6rem 1.5rem 0 0;
  z-index: 3;
  pointer-events: none;
}

.coming-soon-badge {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-red-500);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(220, 38, 38, 0.3);
  border-radius: 4px;
  padding: 0.5rem 1rem;
  transition: transform 0.3s ease;
}

/* ── Horror Effects ────────────────────────────────────────────────────── */

/* Glitch Keyframes */
/* Subtle glitch — mostly stable, with rare creepy micro-distortions */
@keyframes glitch-subtle {
  0%, 100% {
    text-shadow: none;
    transform: none;
    filter: none;
  }
  /* Brief distortion burst 1 */
  3% { text-shadow: -2px 0 #dc2626, 2px 0 #0000ff; transform: skew(-0.5deg); }
  3.5% { text-shadow: 2px 0 #dc2626, -1px 0 #00ff00; transform: skew(0.3deg); }
  4% { text-shadow: none; transform: none; }
  /* Micro-flicker 2 */
  27% { text-shadow: -1px 1px #dc2626; }
  27.5% { text-shadow: none; }
  /* Distortion burst 2 — slightly longer */
  52% { text-shadow: 3px 0 #dc2626, -2px 0 #0000ff; transform: skew(1deg); filter: brightness(1.3); }
  52.8% { text-shadow: -1px -1px #dc2626, 1px 1px #00ff00; transform: skew(-0.5deg); filter: brightness(0.8); }
  53.2% { text-shadow: none; transform: none; filter: none; }
  /* Subtle red flash */
  78% { text-shadow: 0 0 10px rgba(220,38,38,0.5); }
  78.5% { text-shadow: none; }
}

.glitch {
  animation: glitch-subtle 6s ease-in-out infinite;
}

/* Blood Drip */
.blood-drip {
  position: relative;
}

.blood-drip::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 10px;
  background: linear-gradient(to bottom, #dc2626, transparent);
  border-radius: 0 0 50% 50%;
}

/* Scanlines overlay on split-container */
.split-container::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.05) 2px,
    rgba(0, 0, 0, 0.05) 4px
  );
  pointer-events: none;
  z-index: 5;
}

/* Red vignette on split-container */
.split-container::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    transparent 50%,
    rgba(139, 0, 0, 0.15) 100%
  );
  pointer-events: none;
  z-index: 4;
}

/* Pulse animation */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-pulse-slow {
  animation: pulse var(--duration-pulse-slow, 3s) cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ── Header ────────────────────────────────────────────────────────────── */
.hub-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
  padding: 1.25rem 2rem;
  pointer-events: none;
}

.hub-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
}

.hub-header__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  pointer-events: auto;
}

.hub-header__icon {
  font-size: 1.5rem;
  color: var(--color-red-600);
}

.hub-header__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.05em;
}

.hub-header__title--red {
  color: var(--color-red-600);
}

.hub-header__tagline {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
}

/* ── Footer ────────────────────────────────────────────────────────────── */
.hub-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 20;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
  padding: 1.25rem 2rem;
  text-align: center;
  pointer-events: none;
}

.hub-footer p {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* ── Mobile Cards ──────────────────────────────────────────────────────── */
.mobile-cards {
  display: none;
  position: relative;
  width: 100%;
  height: 100dvh;
}

.mobile-cards__track {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  width: 100%;
  height: 100%;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.mobile-cards__track::-webkit-scrollbar {
  display: none;
}

.mobile-card {
  flex: 0 0 100%;
  scroll-snap-align: start;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: inherit;
}

/* Mobile Dot Indicators */
.mobile-dots {
  position: absolute;
  bottom: 4rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.75rem;
  z-index: 15;
}

.mobile-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--color-red-600);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: background-color 0.3s ease;
}

.mobile-dot--active {
  background-color: var(--color-red-600);
}

/* Swipe Hint */
@keyframes swipe-fade {
  0%, 100% {
    opacity: 0;
  }
  20%, 80% {
    opacity: 1;
  }
}

.swipe-hint {
  position: absolute;
  bottom: 6.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  z-index: 15;
  animation: swipe-fade 3s ease-in-out infinite;
  white-space: nowrap;
}

.swipe-hint i {
  font-size: 1rem;
}

.swipe-hint--hidden {
  display: none;
}

/* ── Focus Styles (Accessibility) ──────────────────────────────────────── */
.game-panel:focus-visible,
.mobile-card:focus-visible {
  outline: 3px solid var(--color-red-600);
  outline-offset: -3px;
}

.cta-button:focus-visible {
  outline: 3px solid var(--color-red-600);
  outline-offset: 2px;
}

.mobile-dot:focus-visible {
  outline: 3px solid var(--color-red-600);
  outline-offset: 2px;
}

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

  .game-panel__bg {
    transform: scale(1) !important;
  }

  .game-panel__description {
    opacity: 1 !important;
    transform: translateY(0) !important;
    transition: none !important;
  }
}

/* ── Mobile Layout ─────────────────────────────────────────────────────── */
@media (max-width: 767px) {
  .split-container {
    display: none;
  }

  .split-divider {
    display: none;
  }

  .mobile-cards {
    display: block;
  }

  .hub-header {
    padding: 1rem 1.25rem;
  }

  .hub-header__tagline {
    display: none;
  }

  .hub-header__title {
    font-size: 1rem;
  }

  .hub-header__icon {
    font-size: 1.25rem;
  }

  /* Show descriptions by default on mobile (no hover) */
  .mobile-card .game-panel__description {
    opacity: 1;
    transform: translateY(0);
    transition: none;
  }

  .game-panel__title {
    font-size: clamp(1.75rem, 6vw, 2.5rem);
  }

  .game-panel__icon {
    width: 64px;
    height: 64px;
    font-size: 1.5rem;
  }

  .coming-soon-overlay {
    padding: 5rem 1rem 0 0;
  }
}