/* ============================================================
   DESIGN TOKEN SYSTEM - NapKC.VN
   Modern Design System with CSS Custom Properties
   ============================================================ */

/* --- Color Palette (oklch for perceptual uniformity) --- */
:root {
  /* Brand Colors */
  --color-primary: #DC2626;
  --color-primary-hover: #B91C1C;
  --color-primary-light: #FEE2E2;
  --color-primary-50: #FEF2F2;
  --color-primary-100: #FEE2E2;
  --color-primary-200: #FECACA;
  --color-primary-500: #EF4444;
  --color-primary-600: #DC2626;
  --color-primary-700: #B91C1C;
  --color-primary-800: #991B1B;
  --color-primary-900: #7F1D1D;

  /* Neutral Colors */
  --color-white: #FFFFFF;
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;

  /* Semantic Colors */
  --color-success: #059669;
  --color-success-light: #D1FAE5;
  --color-success-dark: #047857;
  --color-warning: #D97706;
  --color-warning-light: #FEF3C7;
  --color-warning-dark: #B45309;
  --color-error: #DC2626;
  --color-error-light: #FEE2E2;
  --color-error-dark: #B91C1C;
  --color-info: #2563EB;
  --color-info-light: #DBEAFE;
  --color-info-dark: #1D4ED8;

  /* Accent - Diamond Blue (for gem icons) */
  --color-accent: #3B82F6;
  --color-accent-light: #DBEAFE;
  --color-gem: #2563EB;
  --color-bonus: #059669;

  /* Spacing Scale (4px base) */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */

  /* Typography Scale */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 0.375rem;   /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-primary: 0 4px 14px 0 rgb(220 38 38 / 0.25);
  --shadow-primary-lg: 0 8px 25px 0 rgb(220 38 38 / 0.3);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-index scale */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;

  /* Container */
  --container-max: 960px;
  --container-padding: var(--space-6);
}

/* ============================================================
   RESET & BASE STYLES
   ============================================================ */

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

html {
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  color: var(--color-gray-800);
  background: var(--color-gray-50);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Subtle animated gradient background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 400px;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-white) 50%, var(--color-primary-50) 100%);
  z-index: -1;
  pointer-events: none;
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
}

ol, ul {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

/* Focus visible for accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Remove default focus outline only for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* ============================================================
   LAYOUT SYSTEM
   ============================================================ */

.napthe-main {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-main {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-background {
  flex: 1 0 auto;
  padding: 0 0 var(--space-12);
  background-color: var(--color-gray-50);
}

.napthe-content {
  flex: 1 0 auto;
  padding: 0;
  background-color: var(--color-gray-50);
}

.napthe-container {
  max-width: var(--container-max);
  padding: 0 var(--container-padding);
  margin: 0 auto;
}

/* ============================================================
   BANNER
   ============================================================ */

.napthe-banner {
  margin: var(--space-4) 0 var(--space-3);
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.slick-slider {
  position: relative;
  display: block;
  width: 100%;
}

.banner-pc {
  display: none;
}

.banner-mobile {
  display: block;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.banner-mobile img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

@media screen and (min-width: 768px) {
  .banner-mobile {
    display: none;
  }
  .banner-pc {
    display: block;
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
  }
  .banner-pc img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
  }
}

/* ============================================================
   GAME TITLE SECTION
   ============================================================ */

.ten-game {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  padding: var(--space-3) 0;
}

.logo-tro-choi {
  height: 28px;
  margin-right: var(--space-3);
  border-radius: var(--radius-sm);
}

.nhom-game {
  display: flex;
  align-items: center;
  flex: none;
}

.title-ten-game {
  flex: 0 0 auto;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-800);
}

.ten-game::after {
  content: '';
  height: 1px;
  background: linear-gradient(to right, var(--color-gray-200), transparent);
  width: 100%;
}

/* ============================================================
   NOTIFICATION / THONG BAO
   ============================================================ */

.thong-bao {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-primary-200);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-3) var(--space-4);
  margin: var(--space-3) 0;
  background: linear-gradient(135deg, var(--color-primary-50), var(--color-white));
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-gray-700);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.thong-bao:hover {
  box-shadow: var(--shadow-sm);
}

.thong-bao b font[color="#FF0000"],
.thong-bao b font[color="red"],
.thong-bao span[style*="color:#ff0000"],
.thong-bao span[style*="color: #ff0000"] {
  color: var(--color-primary) !important;
  font-weight: var(--font-weight-bold);
}

.chu-y-thong-bao {
  margin-top: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-success) !important;
  font-style: italic;
  opacity: 0.9;
}

/* ============================================================
   FOOTER
   ============================================================ */

footer, .footer {
  width: 100%;
  background-color: var(--color-white);
  color: var(--color-gray-400);
  padding: var(--space-6) var(--space-4);
  text-align: center;
  font-size: var(--font-size-xs);
  line-height: var(--line-height-relaxed);
  border-top: 1px solid var(--color-gray-100);
  margin-top: auto;
}

.footer-link {
  color: var(--color-gray-400);
  padding: var(--space-3) 0;
}

.footer-link a {
  color: var(--color-gray-500);
  transition: color var(--transition-fast);
}

.footer-link a:hover {
  color: var(--color-primary);
}

/* ============================================================
   RESPONSIVE - MOBILE FIRST
   ============================================================ */

@media screen and (max-width: 576px) {
  :root {
    --container-padding: var(--space-4);
  }

  body {
    font-size: var(--font-size-xs);
  }

  .napthe-container {
    max-width: 100%;
    padding: 0 var(--space-3);
  }

  .napthe-banner {
    margin-top: 0;
    margin-bottom: 0;
    border-radius: 0;
  }

  .banner-mobile {
    border-radius: 0;
  }

  .banner-mobile img {
    border-radius: 0;
  }

  .ten-game {
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    background: var(--color-gray-100);
    margin-bottom: var(--space-2);
    border-radius: 0;
  }

  .ten-game::before {
    content: '';
    height: 1px;
    width: 40px;
    background-color: var(--color-gray-400);
  }

  .ten-game::after {
    width: 40px;
    background-color: var(--color-gray-400);
    background: var(--color-gray-400);
  }

  .back-homepage {
    display: none;
  }

  .thong-bao {
    margin: var(--space-2) var(--space-2);
    border-radius: var(--radius-md);
  }
}

/* ============================================================
   SLICK CAROUSEL OVERRIDES
   ============================================================ */

.app-slide {
  margin: var(--space-4) 0 var(--space-3);
}

.napthe-banner .slick-slide a {
  display: block;
  width: 100%;
}

.slick-slide .banner-mb {
  display: none;
}

.slick-slider {
  height: 100px;
}

._1hweB5ItSQQHG-8EWc4tSA {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  margin-top: -22px;
  padding: var(--space-4);
  color: var(--color-white);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  transition: opacity var(--transition-fast);
  user-select: none;
  display: none;
  z-index: -1;
}

.napthe-banner:hover ._1hweB5ItSQQHG-8EWc4tSA {
  z-index: 10;
}

._3PirFWhopJOXGnZhpuqX1r {
  right: 0;
}

@media screen and (max-width: 576px) {
  .slick-slide .banner-pc {
    display: none;
  }
  .slick-slide .banner-mb {
    display: block;
  }
}

/* ============================================================
   GAME LIST (if used)
   ============================================================ */

.danh-sach-tro-choi {
  overflow: hidden;
  margin: var(--space-3) 0 0;
  border-top: 1px solid var(--color-gray-200);
  border-left: 1px solid var(--color-gray-200);
  display: flex;
  flex-wrap: wrap;
}

.tro-choi {
  flex-basis: 33.33%;
}

.link-tro-choi {
  text-align: center;
  display: block;
  border-right: 1px solid var(--color-gray-200);
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--space-6) var(--space-3);
  color: var(--color-gray-700);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.link-tro-choi:hover {
  color: var(--color-gray-900);
  background-color: var(--color-gray-50);
  cursor: pointer;
}

.hinh-anh-tro-choi {
  display: block;
  margin: 0 auto var(--space-3);
  width: 90px;
  height: 90px;
}

.tieu-de-tro-choi {
  line-height: var(--line-height-tight);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

@media screen and (max-width: 576px) {
  .tro-choi {
    flex-basis: 50%;
  }
}

/* ============================================================
   UTILITY: SELECTION & SCROLLBAR
   ============================================================ */

::selection {
  background: var(--color-primary-200);
  color: var(--color-primary-900);
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes slideInRight {
  from { transform: translateX(20px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes drawCheck {
  from { stroke-dashoffset: 100; }
  to { stroke-dashoffset: 0; }
}

@keyframes highlightFlash {
  0%, 100% { background-color: transparent; }
  50% { background-color: var(--color-primary-50); }
}

@keyframes highlightNew {
  0% { background-color: rgba(254, 243, 199, 0.4); }
  100% { background-color: transparent; }
}