/* MS Arena Timeline – responsive + customizable via CSS variables */

.msarena-section{
  /* layout */
  width: 100%;
  max-width: 100%;
  margin-left: 0;
  padding: 20px 0 25px 0;

  /* typography */
  --mt-font-headline: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  --mt-font-body: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;

  /* shared */
  --mt-bg-angle: 180deg;

  /* LIGHT defaults */
  --mt-accent-light: #E7791A;
  --mt-title_color-light: #E7791A;
  --mt-year_color-light: #E7791A;
  --mt-subtitle_color-light: #111111;
  --mt-text_color-light: #505050;
  --mt-category_color-light: #777777;

  --mt-container_bg-light: #ffffff;
  --mt-line_color-light: color-mix(in srgb, #E7791A 70%, transparent);
  --mt-dot_bg-light: #ffffff;
  --mt-dot_border-light: #E7791A;
  --mt-card_bg-light: color-mix(in srgb, #ffffff 92%, transparent);
  --mt-card_border-light: rgba(0,0,0,0.06);
  --mt-glow_color-light: rgba(231,121,26,0.35);
  --mt-watermark_color-light: #E7791A;
  --mt-watermark_opacity-light: 0.08;
  --mt-bg_start-light: rgba(231,121,26,0.06);
  --mt-bg_mid-light: rgba(231,121,26,0.03);
  --mt-bg_end-light: rgba(231,121,26,0.00);
  --mt-shadow-light: rgba(0,0,0,0.15);
  --mt-dots_inactive-light: #c9c9c9;

  /* DARK defaults */
  --mt-accent-dark: #E7791A;
  --mt-title_color-dark: #E7791A;
  --mt-year_color-dark: #E7791A;
  --mt-subtitle_color-dark: #f2f2f2;
  --mt-text_color-dark: #d0d0d0;
  --mt-category_color-dark: #b0b0b0;

  --mt-container_bg-dark: #151515;
  --mt-line_color-dark: color-mix(in srgb, #E7791A 70%, transparent);
  --mt-dot_bg-dark: #151515;
  --mt-dot_border-dark: #E7791A;
  --mt-card_bg-dark: color-mix(in srgb, #151515 92%, transparent);
  --mt-card_border-dark: rgba(255,255,255,0.08);
  --mt-glow_color-dark: rgba(231,121,26,0.45);
  --mt-watermark_color-dark: #E7791A;
  --mt-watermark_opacity-dark: 0.10;
  --mt-bg_start-dark: rgba(231,121,26,0.06);
  --mt-bg_mid-dark: rgba(231,121,26,0.03);
  --mt-bg_end-dark: rgba(231,121,26,0.02);
  --mt-shadow-dark: rgba(0,0,0,0.70);
  --mt-dots_inactive-dark: #555555;

  /* computed (default = light) */
  --mt-accent: var(--mt-accent-light);
  --mt-title_color: var(--mt-title_color-light);
  --mt-year_color: var(--mt-year_color-light);
  --mt-subtitle_color: var(--mt-subtitle_color-light);
  --mt-text_color: var(--mt-text_color-light);
  --mt-category_color: var(--mt-category_color-light);
  --mt-container_bg: var(--mt-container_bg-light);
  --mt-bg_start: var(--mt-bg_start-light);
  --mt-bg_mid: var(--mt-bg_mid-light);
  --mt-bg_end: var(--mt-bg_end-light);
  --mt-shadow: var(--mt-shadow-light);
  --mt-dots_inactive: var(--mt-dots_inactive-light);

  --mt-line_color: var(--mt-line_color-light);
  --mt-dot_bg: var(--mt-dot_bg-light);
  --mt-dot_border: var(--mt-dot_border-light);
  --mt-card_bg: var(--mt-card_bg-light);
  --mt-card_border: var(--mt-card_border-light);
  --mt-glow_color: var(--mt-glow_color-light);
  --mt-watermark_color: var(--mt-watermark_color-light);
  --mt-watermark_opacity: var(--mt-watermark_opacity-light);
}

.msarena-section[data-scheme="dark"]{
  --mt-accent: var(--mt-accent-dark);
  --mt-title_color: var(--mt-title_color-dark);
  --mt-year_color: var(--mt-year_color-dark);
  --mt-subtitle_color: var(--mt-subtitle_color-dark);
  --mt-text_color: var(--mt-text_color-dark);
  --mt-category_color: var(--mt-category_color-dark);
  --mt-container_bg: var(--mt-container_bg-dark);
  --mt-bg_start: var(--mt-bg_start-dark);
  --mt-bg_mid: var(--mt-bg_mid-dark);
  --mt-bg_end: var(--mt-bg_end-dark);
  --mt-shadow: var(--mt-shadow-dark);
  --mt-dots_inactive: var(--mt-dots_inactive-dark);

  --mt-line_color: var(--mt-line_color-dark);
  --mt-dot_bg: var(--mt-dot_bg-dark);
  --mt-dot_border: var(--mt-dot_border-dark);
  --mt-card_bg: var(--mt-card_bg-dark);
  --mt-card_border: var(--mt-card_border-dark);
  --mt-glow_color: var(--mt-glow_color-dark);
  --mt-watermark_color: var(--mt-watermark_color-dark);
  --mt-watermark_opacity: var(--mt-watermark_opacity-dark);
}

@media (prefers-color-scheme: dark){
  .msarena-section[data-scheme="auto"]{
    --mt-accent: var(--mt-accent-dark);
    --mt-title_color: var(--mt-title_color-dark);
    --mt-year_color: var(--mt-year_color-dark);
    --mt-subtitle_color: var(--mt-subtitle_color-dark);
    --mt-text_color: var(--mt-text_color-dark);
    --mt-category_color: var(--mt-category_color-dark);
    --mt-container_bg: var(--mt-container_bg-dark);
    --mt-bg_start: var(--mt-bg_start-dark);
    --mt-bg_mid: var(--mt-bg_mid-dark);
    --mt-bg_end: var(--mt-bg_end-dark);
    --mt-shadow: var(--mt-shadow-dark);
    --mt-dots_inactive: var(--mt-dots_inactive-dark);

    --mt-line_color: var(--mt-line_color-dark);
    --mt-dot_bg: var(--mt-dot_bg-dark);
    --mt-dot_border: var(--mt-dot_border-dark);
    --mt-card_bg: var(--mt-card_bg-dark);
    --mt-card_border: var(--mt-card_border-dark);
    --mt-glow_color: var(--mt-glow_color-dark);
    --mt-watermark_color: var(--mt-watermark_color-dark);
    --mt-watermark_opacity: var(--mt-watermark_opacity-dark);
  }
}

/* -------------------------------------------------
   CONTAINER / CARD
-------------------------------------------------- */
.msarena-container,
.msarena-container *{
  box-sizing: border-box;
}

.msarena-container{
  width: 100%;
  max-width: 1350px;
  padding: 35px 45px;
  margin: 25px auto 35px auto;
  border-radius: 18px;

  background:
    linear-gradient(
      var(--mt-bg-angle),
      var(--mt-bg_start) 0%,
      var(--mt-bg_mid) 45%,
      var(--mt-bg_end) 100%
    ),
    var(--mt-container_bg);

  text-align: center;
  color: var(--mt-text_color);
  box-shadow: 0 20px 40px -12px var(--mt-shadow);
  overflow-x: hidden;

  font-family: var(--mt-font-body);
}

/* -------------------------------------------------
   TITLE
-------------------------------------------------- */
.msarena-title{
  font-family: var(--mt-font-headline);
  font-size: 2.4rem;
  font-weight: 800;
  margin: 0 0 35px 0;
  color: var(--mt-title_color);
  line-height: 1.15;
  overflow-wrap: anywhere;
}

/* -------------------------------------------------
   SLIDER
-------------------------------------------------- */
.msarena-slider{
  position: relative;
  min-height: 245px;
}

.msarena-slide{
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateY(10px) scale(0.985);
  transition: opacity .8s ease, transform .8s ease;
  padding: 10px 20px;

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.msarena-slide.active{
  opacity: 1;
  transform: translateY(0) scale(1);
}

.msarena-image{
  display: block;
  max-width: min(520px, 100%);
  height: auto;
  border-radius: 16px;
  margin: 0 auto 14px auto;
  box-shadow: 0 10px 28px rgba(0,0,0,0.18);
}

.msarena-year{
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--mt-year_color);
  margin-bottom: 10px;
  font-family: var(--mt-font-headline);
}

.msarena-subtitle{
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--mt-subtitle_color);
  margin-bottom: 10px;
  line-height: 1.2;
  overflow-wrap: anywhere;
  font-family: var(--mt-font-headline);
}

.msarena-text{
  font-size: 1rem;
  max-width: 900px;
  margin: 0 auto 10px auto;
  line-height: 1.45;
  color: var(--mt-text_color);
  overflow-wrap: anywhere;
}

.msarena-category{
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--mt-category_color);
  margin-top: 8px;
  overflow-wrap: anywhere;
}

/* -------------------------------------------------
   DOTS
-------------------------------------------------- */
.msarena-dots{
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 35px;

  /* prevent dots from widening the page */
  flex-wrap: wrap;
  max-width: 100%;
  padding: 0 8px;
}

.msarena-dots button{
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  background: var(--mt-dots_inactive);
  transition: transform .2s ease, background .2s ease;
  padding: 0;
}

.msarena-dots button:hover{
  transform: scale(1.15);
}

.msarena-dots button.active{
  background: var(--mt-accent);
}

/* -------------------------------------------------
   MOBILE
-------------------------------------------------- */
@media (max-width: 768px){
  .msarena-container{
    padding: 22px 16px;
    margin: 16px auto 24px auto;
    border-radius: 16px;
  }

  .msarena-title{
    font-size: 1.85rem;
    margin-bottom: 22px;
  }

  .msarena-slider{
    min-height: 260px;
  }

  .msarena-year{
    font-size: 1.45rem;
  }

  .msarena-subtitle{
    font-size: 1.1rem;
  }

  .msarena-text{
    font-size: 0.95rem;
  }

  .msarena-dots{
    gap: 8px;
    margin-top: 22px;
  }

  .msarena-dots button{
    width: 10px;
    height: 10px;
  }
}

@media (max-width: 420px){
  .msarena-container{
    padding: 18px 14px;
  }
  .msarena-title{
    font-size: 1.65rem;
  }
}


/* -------------------------------------------------
   VERTICAL TIMELINE
-------------------------------------------------- */
.msarena-container.layout-vertical{
  text-align: left;
}

.msarena-vertical{
  position: relative;
  max-width: 1050px;
  margin: 0 auto;
  padding-left: 22px;
}

.msarena-vertical:before{
  content: "";
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--mt-line_color);
  opacity: .8;
}

.msarena-vertical-item{
  position: relative;
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 18px;
  padding: 14px 0;
}

.msarena-vertical-marker{
  width: 14px;
  height: 14px;
  border-radius: 999px;
  margin-top: 24px;
  background: var(--mt-dot_bg);
  border: 3px solid var(--mt-dot_border);
  box-shadow: 0 10px 22px rgba(0,0,0,0.18);
}

.msarena-vertical-card{
  position: relative;
  background: var(--mt-card_bg);
  border: 1px solid var(--mt-card_border);
  border-radius: 16px;
  padding: 18px 18px;
  box-shadow: 0 14px 30px -16px var(--mt-shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}

/* Hover glow */
.msarena-section[style*="--mt-feature-hover-glow: 1" i] .msarena-vertical-card:hover,
.msarena-section .msarena-vertical-card:hover{
  box-shadow:
    0 16px 45px -18px var(--mt-shadow),
    0 0 0 1px var(--mt-glow_color),
    0 0 22px var(--mt-glow_color);
  transform: translateY(-2px);
}

/* Watermark year (vertical card) */
.msarena-section[style*="--mt-feature-watermark-year: 1" i] .msarena-vertical-card::before,
.msarena-section .msarena-vertical-card::before{
  content: attr(data-year);
  position: absolute;
  right: 14px;
  top: 10px;
  font-size: 3.2rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--mt-watermark_color);
  opacity: var(--mt-watermark_opacity);
  pointer-events: none;
  user-select: none;
  font-family: var(--mt-font-headline);
}

/* Scroll-in animation helpers */
.msarena-vertical-item{
  opacity: 1;
}
.msarena-vertical-item.mt-anim{
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s ease, transform .7s ease;
}
.msarena-vertical-item.mt-anim.is-visible{
  opacity: 1;
  transform: translateY(0);
}

.msarena-container.layout-vertical .msarena-image{
  max-width: 100%;
}

.msarena-container.layout-vertical .msarena-title{
  text-align: center;
}

@media (max-width: 640px){
  .msarena-vertical{ padding-left: 14px; }
  .msarena-vertical:before{ left: 6px; }
  .msarena-vertical-item{ grid-template-columns: 16px 1fr; gap: 12px; }
  .msarena-vertical-marker{ width: 12px; height: 12px; border-width: 3px; }
}


/* -------------------------------------------------
   VERTICAL (ALTERNATING LEFT/RIGHT, CENTER LINE)
-------------------------------------------------- */
.msarena-container.layout-vertical-alternate{
  text-align: left;
}

.msarena-vertical-alt{
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 0;
}

.msarena-vertical-alt::before{
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  transform: translateX(-50%);
  background: var(--mt-line_color);
  opacity: .9;
}

.msarena-vertical-alt-item{
  position: relative;
  width: 50%;
  padding: 14px 52px;
}

.msarena-vertical-alt-left{
  left: 0;
  text-align: right;
}

.msarena-vertical-alt-right{
  left: 50%;
  text-align: left;
}

.msarena-vertical-alt-dot{
  position: absolute;
  left: 50%;
  top: 34px;
  width: 16px;
  height: 16px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: var(--mt-dot_bg);
  border: 3px solid var(--mt-dot_border);
  box-shadow: 0 10px 22px rgba(0,0,0,0.18);
  z-index: 2;
}

/* connector line from card to center */
.msarena-vertical-alt-item::after{
  content: "";
  position: absolute;
  top: 42px;
  width: 46px;
  height: 2px;
  background: var(--mt-line_color);
  opacity: .85;
}
.msarena-vertical-alt-left::after{
  right: 6px;
}
.msarena-vertical-alt-right::after{
  left: 6px;
}

.msarena-vertical-alt-card{
  position: relative;
  background: var(--mt-card_bg);
  border: 1px solid var(--mt-card_border);
  border-radius: 16px;
  padding: 26px 18px 18px 18px;
  box-shadow: 0 14px 30px -16px var(--mt-shadow);
  transition: transform .25s ease, box-shadow .25s ease;
  overflow: hidden;
}

.msarena-vertical-alt-card:hover{
  box-shadow:
    0 16px 45px -18px var(--mt-shadow),
    0 0 0 1px var(--mt-glow_color),
    0 0 22px var(--mt-glow_color);
  transform: translateY(-2px);
}

/* Watermark year (alternating card) */
.msarena-vertical-alt-card::before{
  content: attr(data-year);
  position: absolute;
  top: 10px;
  left: 16px;
  right: auto;
  font-size: var(--mt-watermark_size, 3.4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--mt-watermark_color);
  opacity: calc(var(--mt-watermark_opacity) * var(--mt-feature-watermark-year));
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
  font-family: var(--mt-font-headline);
  z-index: 0;
}

/* Put watermark in the correct corner depending on side */
.msarena-vertical-alt-right .msarena-vertical-alt-card::before{
  left: auto;
  right: 16px;
  text-align: right;
}

/* Ensure real content stays above watermark */
.msarena-vertical-alt-card > *{
  position: relative;
  z-index: 1;
}


/* Scroll animation (alternate) */
.msarena-vertical-alt-item.mt-anim{
  opacity: 0;
  transition: opacity .75s ease, transform .75s ease;
}
.msarena-vertical-alt-left.mt-anim{ transform: translateX(-22px) translateY(12px); }
.msarena-vertical-alt-right.mt-anim{ transform: translateX(22px) translateY(12px); }
.msarena-vertical-alt-item.mt-anim.is-visible{ opacity: 1; transform: translateX(0) translateY(0); }

@media (max-width: 820px){
  .msarena-vertical-alt-item{ padding: 14px 34px; }
  .msarena-vertical-alt-item::after{ width: 30px; }
}

@media (max-width: 680px){
  .msarena-vertical-alt::before{ left: 14px; transform: none; }
  .msarena-vertical-alt-item{ width: 100%; left: 0 !important; text-align: left !important; padding: 14px 14px 14px 44px; }
  .msarena-vertical-alt-dot{ left: 14px; transform: none; }
  .msarena-vertical-alt-item::after{ display: none; }
}