/* ==========================================================================
   Dam San Open Cup - Global CSS System
   ========================================================================== */

/* 1. Font Imports */
@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap');

@font-face {
  font-family: 'AdiCup';
  src: url('../assets/AdiCupQ2022-v3.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
}

/* 2. Custom CSS Properties (Design System Tokens) */
:root {
  /* Colors (Strict 3-Color Palette) */
  --color-primary: #1A1C1C;
  /* Deep Charcoal */
  --color-secondary: #FFFFFF;
  /* White */
  --color-accent: #EB781E;
  --color-accent-rgb: 235, 120, 30;
  /* Vibrant Orange */

  /* Color Opacity Variants */
  --color-primary-10: rgba(26, 28, 28, 0.1);
  --color-primary-20: rgba(26, 28, 28, 0.2);
  --color-primary-80: rgba(26, 28, 28, 0.8);

  /* Fonts */
  --font-display: 'Roboto', sans-serif;
  --font-body: 'Roboto', sans-serif;
  --font-branding: 'AdiCup', sans-serif;

  /* Spacing Scale (8px Base Unit) */
  --spacing-unit: 8px;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 64px;
  --spacing-xxl: 120px;

  /* Grid & Layout Metrics */
  --container-max: 1280px;
  --layout-margin: 64px;
  --layout-gutter: 24px;
  --grid-columns: 12;
}

/* 3. Modern CSS Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background-color: var(--color-primary);
}

body {
  font-family: var(--font-body);
  background-color: var(--color-primary);
  color: var(--color-secondary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.overlay-scroll-lock {
  overflow: hidden;
  height: 100vh;
}

.site-overlay-blur {
  position: fixed;
  inset: 0;
  z-index: 8999;
  background: rgba(0, 0, 0, 0.08);
  -webkit-backdrop-filter: blur(22px);
  backdrop-filter: blur(22px);
  pointer-events: none;
  transform-origin: top right;
  will-change: opacity, transform, filter, backdrop-filter;
}

.site-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 46%, rgba(235, 120, 30, 0.2), transparent 30%),
    linear-gradient(180deg, rgba(4, 5, 8, 0.72) 0%, rgba(12, 13, 16, 0.62) 48%, rgba(0, 0, 0, 0.74) 100%);
  opacity: 1;
  pointer-events: none;
  transform-origin: top right;
  will-change: opacity, transform, filter;
}

.site-overlay::before,
.site-overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.site-overlay::before {
  background:
    linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.08) 48%, transparent 58%),
    repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.026) 0 1px, transparent 1px 5px);
  mix-blend-mode: screen;
  opacity: 0.22;
  transform: translateX(-30%);
  animation: overlayBroadcastSweep 1.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.site-overlay::after {
  background: radial-gradient(ellipse at center, transparent 36%, rgba(0, 0, 0, 0.76) 100%);
  opacity: 0.74;
}

.site-overlay-title {
  position: fixed;
  inset: 0;
  z-index: 9001;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 2.8vw, 32px);
  padding-inline: var(--layout-margin);
  opacity: 1;
  transform: none;
  transform-origin: top right;
  filter: none;
  pointer-events: none;
  will-change: opacity, transform, filter;
}

.overlay-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin: 0 auto;
  color: var(--color-secondary);
  font-family: var(--font-branding) !important;
  font-size: clamp(34px, 10.5vw, 130px);
  font-weight: 900;
  line-height: 1.4;
  letter-spacing: 0.02em;
  text-align: center;
  text-shadow:
    0 3px 0 rgba(0, 0, 0, 0.54),
    0 16px 32px rgba(0, 0, 0, 0.8),
    0 0 42px rgba(235, 120, 30, 0.3);
  text-transform: uppercase;
}

.overlay-title-line {
  /* Mỗi dòng title giữ nguyên layout, còn từng từ bên trong sẽ tự animate riêng. */
  position: relative;
  display: block;
  white-space: nowrap;
  opacity: 0;
  transform: none;
  transform-origin: center;
  filter: none;
  overflow: visible;
  will-change: opacity, transform, filter;
}

.overlay-title-word {
  /* Trạng thái ban đầu: từng từ nằm ngoài màn hình phía trên để tạo cú rơi mạnh. */
  position: relative;
  display: inline-block;
  opacity: 0;
  transform: translate3d(0, -112vh, 0) scaleX(0.86) scaleY(1.22);
  transform-origin: center bottom;
  will-change: opacity, transform, filter;
}

.overlay-title-word-space {
  display: inline-block;
  width: 0.32em;
}

.overlay-title-word::before,
.overlay-title-word::after {
  /* Hai pseudo-element này chỉ hiện khi từ chạm xuống để tạo cảm giác nứt và sóng chấn động. */
  content: "";
  position: absolute;
  left: 50%;
  bottom: -0.08em;
  width: 112%;
  height: 0.18em;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) scaleX(0.18);
  transform-origin: center;
}

.overlay-title-word::after {
  /* Quầng sáng mờ lan ngang ra ngoài như một shockwave ngắn. */
  bottom: -0.16em;
  height: 0.08em;
  background: rgba(235, 120, 30, 0.42);
  filter: blur(8px);
}

.overlay-title-word.is-impacting::before {
  animation: wordCrackImpact 520ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.overlay-title-word.is-impacting::after {
  animation: wordShockwave 520ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.overlay-return-title {
  width: min(100%, 980px);
  color: var(--color-secondary);
  font-family: var(--font-body);
  font-size: clamp(18px, 4.2vw, 54px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0.02em;
  text-align: center;
  text-transform: uppercase;
  opacity: 0;
  transform: translate3d(44vw, 0, 0) scaleX(1.18);
  filter: blur(12px);
  text-shadow:
    0 10px 24px rgba(0, 0, 0, 0.72),
    0 0 30px rgba(235, 120, 30, 0.38);
  will-change: opacity, transform, filter;
}

@keyframes overlayBroadcastSweep {
  0% {
    opacity: 0;
    transform: translateX(-36%);
  }

  32% {
    opacity: 0.34;
  }

  100% {
    opacity: 0.16;
    transform: translateX(24%);
  }
}

@keyframes wordCrackImpact {

  /* Nứt vỡ xuất hiện nhanh rồi tan ra để không làm rối typography chính. */
  0% {
    opacity: 0;
    transform: translateX(-50%) scaleX(0.16) translateY(0.04em);
  }

  18% {
    opacity: 0.95;
  }

  100% {
    opacity: 0;
    transform: translateX(-50%) scaleX(1) translateY(0.16em);
  }
}

@keyframes wordShockwave {

  /* Sóng chấn động lan rộng dưới chữ khi từ rơi vào đúng vị trí. */
  0% {
    opacity: 0;
    transform: translateX(-50%) scaleX(0.2);
  }

  22% {
    opacity: 0.82;
  }

  100% {
    opacity: 0;
    transform: translateX(-50%) scaleX(1.34);
  }
}

@media (prefers-reduced-motion: reduce) {

  .site-overlay::before {
    animation: none;
  }
}

/* Reusable Resets for Elements */
img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

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

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
}

/* Custom Scrollbar to match Premium Brand */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border: 2px solid var(--color-secondary);
}

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

/* 4. Typography System */
.display-lg {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 96px;
  line-height: 90px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.headline-xl {
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 48px;
  line-height: 56px;
  letter-spacing: -0.02em;
}

.headline-md {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 24px;
  line-height: 32px;
}

.body-lg {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 18px;
  line-height: 28px;
}

.body-md {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 24px;
}

.label-caps {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 14px;
  line-height: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  line-height: 1.6;
}

/* 5. Container & Layout System */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--layout-margin);
  padding-right: var(--layout-margin);
}

/* 6. Grid System */
.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), minmax(0, 1fr));
  gap: var(--layout-gutter);
}

/* Column Spans */
.col-span-1 {
  grid-column: span 1 / span 1;
}

.col-span-2 {
  grid-column: span 2 / span 2;
}

.col-span-3 {
  grid-column: span 3 / span 3;
}

.col-span-4 {
  grid-column: span 4 / span 4;
}

.col-span-5 {
  grid-column: span 5 / span 5;
}

.col-span-6 {
  grid-column: span 6 / span 6;
}

.col-span-7 {
  grid-column: span 7 / span 7;
}

.col-span-8 {
  grid-column: span 8 / span 8;
}

.col-span-9 {
  grid-column: span 9 / span 9;
}

.col-span-10 {
  grid-column: span 10 / span 10;
}

.col-span-11 {
  grid-column: span 11 / span 11;
}

.col-span-12 {
  grid-column: span 12 / span 12;
}

/* Grid Offsets */
.col-start-1 {
  grid-column-start: 1;
}

.col-start-2 {
  grid-column-start: 2;
}

.col-start-3 {
  grid-column-start: 3;
}

.col-start-4 {
  grid-column-start: 4;
}

.col-start-5 {
  grid-column-start: 5;
}

.col-start-6 {
  grid-column-start: 6;
}

.col-start-7 {
  grid-column-start: 7;
}

.col-start-8 {
  grid-column-start: 8;
}

.col-start-9 {
  grid-column-start: 9;
}

.col-start-10 {
  grid-column-start: 10;
}

.col-start-11 {
  grid-column-start: 11;
}

.col-start-12 {
  grid-column-start: 12;
}

/* 7. Premium Component Baseline Styles */

/* Buttons (Strict Sharp Corners, No Radius) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 0px;
  padding: 12px 28px;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-secondary);
  border: none;
}

.btn-primary:hover {
  background-color: var(--color-primary);
  color: var(--color-secondary);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  padding: 10px 26px;
  /* Offset for border width */
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-secondary);
}

/* Cards (Strict Sharp Corners, No Shadow) */
.card {
  background-color: var(--color-secondary);
  border: 1px solid var(--color-primary-10);
  border-radius: 0px;
  padding: var(--spacing-lg);
  transition: border-color 0.25s ease;
}

.card:hover {
  border-color: var(--color-accent);
}

.card-stats {
  background-color: var(--color-secondary);
  border: 1px solid var(--color-primary);
  border-radius: 0px;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.card-stats .metric {
  font-family: var(--font-display);
  font-size: 56px;
  color: var(--color-accent);
  line-height: 1;
}

/* 8. Spacing Utilities (Margins & Paddings matching scale) */

/* Margins */
.m-none {
  margin: 0;
}

.m-xs {
  margin: var(--spacing-xs);
}

.m-sm {
  margin: var(--spacing-sm);
}

.m-md {
  margin: var(--spacing-md);
}

.m-lg {
  margin: var(--spacing-lg);
}

.m-xl {
  margin: var(--spacing-xl);
}

.mt-none {
  margin-top: 0;
}

.mt-xs {
  margin-top: var(--spacing-xs);
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mt-xxl {
  margin-top: var(--spacing-xxl);
}

.mb-none {
  margin-bottom: 0;
}

.mb-xs {
  margin-bottom: var(--spacing-xs);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.mb-xxl {
  margin-bottom: var(--spacing-xxl);
}

.ml-none {
  margin-left: 0;
}

.ml-xs {
  margin-left: var(--spacing-xs);
}

.ml-sm {
  margin-left: var(--spacing-sm);
}

.ml-md {
  margin-left: var(--spacing-md);
}

.ml-lg {
  margin-left: var(--spacing-lg);
}

.ml-xl {
  margin-left: var(--spacing-xl);
}

.mr-none {
  margin-right: 0;
}

.mr-xs {
  margin-right: var(--spacing-xs);
}

.mr-sm {
  margin-right: var(--spacing-sm);
}

.mr-md {
  margin-right: var(--spacing-md);
}

.mr-lg {
  margin-right: var(--spacing-lg);
}

.mr-xl {
  margin-right: var(--spacing-xl);
}

/* Paddings */
.p-none {
  padding: 0;
}

.p-xs {
  padding: var(--spacing-xs);
}

.p-sm {
  padding: var(--spacing-sm);
}

.p-md {
  padding: var(--spacing-md);
}

.p-lg {
  padding: var(--spacing-lg);
}

.p-xl {
  padding: var(--spacing-xl);
}

.pt-none {
  padding-top: 0;
}

.pt-xs {
  padding-top: var(--spacing-xs);
}

.pt-sm {
  padding-top: var(--spacing-sm);
}

.pt-md {
  padding-top: var(--spacing-md);
}

.pt-lg {
  padding-top: var(--spacing-lg);
}

.pt-xl {
  padding-top: var(--spacing-xl);
}

.pb-none {
  padding-bottom: 0;
}

.pb-xs {
  padding-bottom: var(--spacing-xs);
}

.pb-sm {
  padding-bottom: var(--spacing-sm);
}

.pb-md {
  padding-bottom: var(--spacing-md);
}

.pb-lg {
  padding-bottom: var(--spacing-lg);
}

.pb-xl {
  padding-bottom: var(--spacing-xl);
}

.pl-none {
  padding-left: 0;
}

.pl-xs {
  padding-left: var(--spacing-xs);
}

.pl-sm {
  padding-left: var(--spacing-sm);
}

.pl-md {
  padding-left: var(--spacing-md);
}

.pl-lg {
  padding-left: var(--spacing-lg);
}

.pl-xl {
  padding-left: var(--spacing-xl);
}

.pr-none {
  padding-right: 0;
}

.pr-xs {
  padding-right: var(--spacing-xs);
}

.pr-sm {
  padding-right: var(--spacing-sm);
}

.pr-md {
  padding-right: var(--spacing-md);
}

.pr-lg {
  padding-right: var(--spacing-lg);
}

.pr-xl {
  padding-right: var(--spacing-xl);
}

/* Padding & Margin Extensions */
.pt-xxl {
  padding-top: var(--spacing-xxl);
}

.pb-xxl {
  padding-bottom: var(--spacing-xxl);
}

.mt-xxl {
  margin-top: var(--spacing-xxl);
}

.mb-xxl {
  margin-bottom: var(--spacing-xxl);
}

/* Color Utility Classes */
.text-primary {
  color: var(--color-primary) !important;
}

.text-secondary {
  color: var(--color-secondary) !important;
}

.text-accent {
  color: var(--color-accent) !important;
}

.text-primary-80 {
  color: var(--color-primary-80) !important;
  text-align: justify;
}

.text-secondary-80 {
  color: var(--color-secondary-80) !important;
  text-align: justify;
}

.text-center {
  text-align: center !important;
}

.italic {
  font-style: italic !important;
}

/* Section Title Sizing overrides matching Stitch Design */
h2.display-lg {
  font-size: 36px !important;
  line-height: 1.6 !important;
  letter-spacing: 0.02em;
  font-weight: 600;
}

@media (max-width: 1023px) {
  .overlay-title {
    font-size: clamp(34px, 10vw, 80px);
    line-height: 1.4;
  }

  h2.display-lg {
    font-size: 26px !important;
  }
}

@media (max-width: 479px) {
  .overlay-title {
    font-size: clamp(30px, 9.8vw, 46px);
    line-height: 1.4;
  }

  h2.display-lg {
    font-size: 22px !important;
  }
}

/* 9. Responsive Breakpoints & Media Queries */

/* Tablet & Mobile Layout Adjustment (< 1024px) */
@media (max-width: 1023px) {
  :root {
    --layout-margin: 20px;
    --layout-gutter: 20px;
    --grid-columns: 4;
    /* Switch to 4-column system */
  }

  /* Typography Scale Down */
  .display-lg {
    font-size: 48px;
    line-height: 1.05;
  }

  .headline-xl {
    font-size: 30px;
    line-height: 38px;
    letter-spacing: -0.01em;
  }

  .headline-md {
    font-size: 20px;
    line-height: 28px;
  }

  .body-lg {
    font-size: 16px;
    line-height: 24px;
  }

  .body-md {
    font-size: 15px;
    line-height: 23px;
  }

  .label-caps {
    font-size: 12px;
    line-height: 1.4;
  }

  /* Spacing Scale Adjustments on Mobile */
  :root {
    --spacing-xxl: 64px;
    /* Sections breathe with 64px on mobile instead of 120px */
  }

  /* Mobile Grid spans */
  .col-span-md-1 {
    grid-column: span 1 / span 1;
  }

  .col-span-md-2 {
    grid-column: span 2 / span 2;
  }

  .col-span-md-3 {
    grid-column: span 3 / span 3;
  }

  .col-span-md-4 {
    grid-column: span 4 / span 4;
  }
}

/* Extra Mobile Adjustments (< 480px) */
@media (max-width: 479px) {
  .display-lg {
    font-size: 36px;
    line-height: 1.05;
  }

  .headline-xl {
    font-size: 28px;
    line-height: 34px;
  }

  .headline-md {
    font-size: 16px;
    line-height: 24px;
  }

  .body-lg {
    font-size: 15px;
    line-height: 23px;
  }

  .body-md {
    font-size: 14px;
    line-height: 22px;
  }

  .label-caps {
    font-size: 11px;
    line-height: 1.35;
  }

  .btn {
    width: 100%;
    /* Force buttons full-width on very small screens */
  }
}