/* color palette from <https://github.com/vuejs/theme> */
:root {
  --color-white: #ffffff;
  --color-black: #000000;
  --color-blue: #1177CC;
  --color-mute: #F4F0E9;
  --color-yellow: #FFE600;

  --color-black-soft: #222222;
  --color-black-mute: #282828;
  --color-gray-900: #121212;
  --color-gray-800: #1c1c1c;
  --color-gray-700: #2a2a2a;
  --color-gray-600: #444444;
  --color-gray-500: #666666;
  --color-gray-400: #888888;
  --color-gray-300: #aaaaaa;
  --color-gray-200: #cccccc;
  --color-gray-100: #e6e6e6;

}

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

html {
  scroll-behavior: smooth;
}
body {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}
.hidden {
  display: none !important;
}
.show {
  display: block !important;
}

strong {
  font-weight: bold;
}
.bold,
.bold * {
  font-weight: bold;
}
.paragraph p + p {
  margin-top: 0.8em;
}

body {
  min-height: 100vh;
  color: var(--color-black);
  background: var(--color-mute);
  line-height: 1.6;
  font-family:
  'Inder',
  'Noto Sans TC',
  Inter,
  -apple-system,
  BlinkMacSystemFont,
  'Segoe UI',
  Roboto,
  Oxygen,
  Ubuntu,
  Cantarell,
  'Fira Sans',
  'Droid Sans',
  'Helvetica Neue',
  sans-serif;
  font-size: 18px;
}

.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 20px;
}
.content {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.content * + * {
  margin-top: 0.85em;
}
.content ol, .content ul {
    list-style: auto;
    padding-left: 2em;
    margin-top: 0.35em;
    margin-bottom: 0.5em;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 20px 4px;
  background-color: var(--color-yellow);
  color: var(--color-black);
  text-decoration: none;
  border-radius: 99px;
  width: fit-content;
  font-weight: bold;
  letter-spacing: 0.06em;
}
.btn.disabled {
  background-color: var(--color-gray-100);
  color: var(--color-gray-600);
  cursor: not-allowed;
}
.btn-sm {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  padding: 0px 10px;
  border-radius: 3px;
}
.btn-md {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px 6px;
  background-color: var(--color-yellow);
  color: var(--color-black);
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
  letter-spacing: 0.06em;
  width: 200px;
}
.btn-lg {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 100%;
  padding: 14px 65px 12px;
  background-color: var(--color-yellow);
  color: var(--color-black);
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
  letter-spacing: 0.06em;
}
.btn-md.disabled {
  background-color: var(--color-gray-50);
  color: var(--color-gray-300);
  width: fit-content;
}
.long-dash {
  display: inline-block;
  width: 60px;
  height: 2px;
  background-color: var(--color-blue);
  vertical-align: middle;
  margin-left: 6px;
  margin-right: 6px;
}
.icon-circle {
  display: flex;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 99px;
  margin: 0 auto 1em;
}
.sec-title {
  font-size: 1.8rem;
  font-weight: bold;
  letter-spacing: 0.06em;
  line-height: 1.3;
}
.paragraph p + p {
  margin-top: 0.5em;
}

/* header */
header {
  position: fixed;
  z-index: 1000;
  top: 0;
  left: 0;
  width: 100%;
  color: var(--color-black);
  transition: background-color 0.6s ease;
}

header .container {
  padding: 0px 20px 0px;
}
.navbar {
  transition: transform 0.3s ease;
  position: absolute;
  left: 0;
  width: 100%;
  transform: translateX(-100%);
  padding-top: 60px;
  border-bottom: 1.5px solid var(--color-blue);
}
.navbar.active {
  transform: translateX(0%);
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.navbar ul {
  display: flex;
  flex-direction: column;
  gap: 0px;
}
.navbar a {
  position: relative;
  font-size: 1rem;
  display: block;
  padding: 16px 30px 16px 36px;
  border-top: .5px solid var(--color-blue);
}
.navbar a:hover,
.navbar a:active,
.navbar a.active {
  color: var(--color-blue);
}
.navbar a::before {
  content: '';
  position: absolute;
  left: 0px;
  top: 0px;
  width: 6px;
  height: 100%;
  background-color: var(--color-blue);
  transform: scaleX(0);
  transition: transform 0.3s ease;
  transform-origin: left;
}
.navbar a:hover::before,
.navbar a.active::before {
  transform: scaleX(1);
}
.social-media-list {
  display: flex;
  gap: 10px;
}
.social-media-list li {
  display: inline-flex;
}
.social-media-list a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
}
.hbg-btn {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 13px 13px 12px;
  margin-left: 0px;
  margin-top: 5px;
  border-radius: 8px;
  z-index: 999;
  transition: all 0.6s ease;
}
header.onsticky .navbar:not(.active) + .hbg-btn {
  background-color: var(--color-white);
  box-shadow: 0 0 1px var(--color-blue);
}
.hbg-line {
  display: block;
  width: 36px;
  height: 6px;
  background-color: var(--color-blue);
  border-radius: 4px;
  transition: all 0.3s ease;
  transform-origin: center;
}
.navbar.active + .hbg-btn .hbg-line:nth-child(1) {
  transform: rotate(45deg) translate(8px, 7px);
}
.navbar.active + .hbg-btn .hbg-line:nth-child(2) {
  opacity: 0;
  width: 0;
}
.navbar.active + .hbg-btn .hbg-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}
@media screen and (min-width: 768px) {
  header.onsticky {
    background-color: var(--color-mute);
  }
  .navbar {
    position: relative;
    display: block;
    transform: translateX(0%);
    border: 0;
    width: auto;
    padding: 0;
  }
  .navbar ul {
    flex-direction: row;
    gap: 20px;
  }
  .hbg-btn {
    display: none;
  }
  .navbar a {
    position: relative;
    padding: 40px 20px 10px 20px;
    border: 0;
  }
  .navbar a:hover,
  .navbar a.active {
    color: var(--color-blue);
  }
  .navbar a::before {
    content: none !important;
  }
  .navbar a::after {
    content: '';
    position: absolute;
    left: 10px;
    right: 10px;
    bottom: 0;
    height: 1.5px;
    background-color: var(--color-blue);
    transform: scaleX(0);
    transition: transform 0.3s ease;
  }
  .navbar a:hover::after,
  .navbar a.active::after {
    transform: scaleX(1);
  }
}

/* main content */
main > section:first-of-type {
  padding-top: 40px;
}
main .container {
  padding: 60px 20px 60px;
}
#about .container {
  padding: 80px 20px 80px;
}
#join .container {
  padding: 80px 20px 80px;
}
@media screen and (min-width: 768px) {
  main > section:first-of-type {
    padding-top: 60px;
  }
}
@media screen and (min-width: 1440px) {
  main > section:first-of-type {
    padding-top: 100px;
  }
}
/* div dec */
.divider {
  width: 100%;
  height: 60px;
  overflow: hidden;
  pointer-events: none;
}
.divider img, .divider svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}
@media screen and (min-width: 768px) {
  .divider {
    height: auto;
  }
}
.dec-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}
.dec-cloud-home {
  background-image: url('../img/cloud.svg');
  background-repeat: no-repeat;
  background-position: 150% -20%;
  background-size: 70%;
}
.dec-cloud-events {
  position: fixed;
  height: 100vh;
  background-image: url('../img/big_cloud.svg');
  background-repeat: no-repeat;
  background-position: 90% 100%;
  background-size: auto 60%;
}
.decs {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  overflow: hidden;
}
.decs-home img {
  position: absolute;
  display: none;
}

.decs-home img:nth-of-type(2) { display: block; left: -5%; bottom: 0%; width: 40%; }
.decs-home img:nth-of-type(3) { display: block; right: 25%; top: 3%; width: 33%; }

.decs-about img {
  position: absolute;
}
.decs-about img:nth-of-type(1) { top: 5%; max-width: 50%; }

.decs-events img {
  position: absolute;
}
.decs-events img:nth-of-type(1) { left:5%; top: 2%; }
@media screen and (min-width: 400px) {
  .decs-events img:nth-of-type(1) { left:15%; top: 2%; }

}

@media screen and (min-width: 768px) {
  .dec-cloud-events {
    background-size: auto 80%;
    background-position: 100% 100%;
  }
  .dec-cloud-home {
    background-image: url('../img/cloud.svg'), url('../img/cloud.svg');
    background-repeat: no-repeat, no-repeat;
    background-position: -20% 30%, 120% 30%;
    background-size: 30%, 30%;
  }

  .decs-home img {
    display: block;
  }
  .decs-home img:nth-of-type(1) { left: 10%; top: 5%; }
  .decs-home img:nth-of-type(2) { left: 18%; bottom: 0; width: auto; }
  .decs-home img:nth-of-type(3) { right: 10%; top: 20%; width: auto; }
  .decs-home img:nth-of-type(4) { right: 25%; top: 10%; }
  .decs-home img:nth-of-type(5) { right: 30%; top: 65%; }

  .decs-events img:nth-of-type(1) { left:15%; top: 4%; }

}
@media screen and (min-width: 1024px) {

  .decs-about img:nth-of-type(1) { display: block; left: 0%; top: 10%; }

}
@media screen and (min-width: 1280px) {
  .dec-cloud-home {
    background-size: 25%, 25%;
    background-position: -10% 30%, 110% 30%;
  }
  .dec-cloud-news {
    background-image: url('../img/news_c_1.svg'), url('../img/news_c_3.svg');
    background-repeat: no-repeat, no-repeat;
    background-position: 98% 5%, 4% 35%;
    z-index: 10;
  }
  .decs-about img:nth-of-type(1) { display: block; left: 2%; top: 10%; }

  .decs-events img:nth-of-type(1) { left:25%; top: 4%; }

}
/* footer */
footer {
  border-top: 1px solid var(--color-mute);
}
footer .container {
  padding: 60px 20px 48px;
}

/* dots */
.dot-cards {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 48px;
  margin-bottom: 48px;
}
.dot-card {
  width: 360px;
  position: relative;
  padding: 80px 80px 80px 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  color: var(--color-mute);
}
.dot-card:nth-child(1) {
  background-image: url('../img/dot_card_1.svg');
}
.dot-card:nth-child(2) {
  background-image: url('../img/dot_card_2.svg');
}
.dot-card:nth-child(3) {
  background-image: url('../img/dot_card_3.svg');
}
@media screen and (min-width: 768px) {
  .dot-card:nth-child(1) {
    margin-top: 80px;
  }
  .dot-card:nth-child(2) {
    margin-bottom: 80px;
  }
  .dot-card:nth-child(3) {
    margin-top: 90px;
  }
}
.dot-card h4 {
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 6px;
}
.dot-card .btn {
  margin-top: 20px;
}
.dot-card .social-media-list {
  margin-top: 20px;
}

/* collapse */
.collapse-list {
  width: calc(100% + 40px);
  margin-left: -20px;
}
.collapse-item {
  padding: 16px 0px 16px 8px;
  transition: all 0.4s ease;
}
.collapse-item + .collapse-item {
}
.collapse-item:has( > .collapse-target.active) {
  background-color: rgba(0, 0, 0, 0.15);
  margin-bottom: 1em;
}
.collapse-item:has( > .collapse-toggler:hover) {
  background-color: rgba(0, 0, 0, 0.15);
}
.collapse-sub-item {
  padding: 8px 16px;
  border-radius: 4px;
}
.collapse-sub-item:has( > .collapse-target.active) {
  background-color: rgba(0, 0, 0, 0.15);
  margin-bottom: 1em;
}
.collapse-sub-item:has( > .collapse-toggler:hover) {
  background-color: rgba(0, 0, 0, 0.15);
}
.collapse-toggler {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  cursor: pointer;
  text-align: left;
  gap: 8px;
}
.collapse-toggler.btn-md {
  width: fit-content;
  background-color: var(--color-black);
  color: var(--color-mute);
}
.collapse-item > .collapse-toggler {
  padding-right: 16px;
  padding-left: 8px;
}
ul .collapse-toggler:hover {
  color: var(--color-yellow);
}
.collapse-target .collapse-toggler svg {
  width: 12px;
  height: 12px;
  margin-right: 1px;
  flex-shrink: 0;
}
.collapse-toggler[data-showtext]::after {
  content: attr(data-showtext);
}
.collapse-toggler[data-hidetext].active::after {
  content: attr(data-hidetext);
}
.collapse-toggler .showicon,
.collapse-toggler .hideicon {
  display: none;
}
.collapse-toggler:not(.active) .showicon {
  display: block;
}
.collapse-toggler.active .hideicon {
  display: block;
}
ul .collapse-toggler.active svg path {
  transition: transform 0.3s ease;
  transform-origin: center;
  transform: scaleY(1);
}
ul .collapse-toggler.active svg path:nth-child(2) {
  transform: scaleY(0);
}
.collapse-target {
  height: 0;
  overflow: hidden;
  transition: max-height 0.6s ease;
}
.collapse-target.active {
  height: fit-content;
}

.collapse-target.paragraph > p:first-child {
  margin-top: 0.5em;
}
.collapse-target.paragraph > p:last-child {
  margin-bottom: 0.5em;
}
@media screen and (min-width: 768px) {
  .collapse-list {
    width: 100%;
    margin-left: auto;
  }
  .collapse-item {
    padding: 16px 8px 16px 24px;
    border-radius: 8px;
  }
}
/* partners */
.partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.partners li {

}
.partners li .partner-link {
  text-align: center;
  padding: 20px 32px 20px;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--color-white);
  border-radius: 8px;
}
.partners li h4 {
  font-weight: 500;
  line-height: 1.45;
  margin: 0.5em auto 0.35em;
}
.partners li span {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  line-height: 1.2;
  display: block;
}
.partners + h2 {
  margin-top: 3em;
}
@media screen and (min-width: 560px) {
  .partners {
    grid-template-columns: 1fr 1fr;
  }
}
@media screen and (min-width: 768px) {
  .partners {
    grid-template-columns: 1fr 1fr 1fr;
  }
}
@media screen and (min-width: 1024px) {
  .partners {
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
  }
}
/* event */
.event-card {
  background-color: var(--color-white);
  padding: 18px 24px;
  border-radius: 12px;
}
.categories li span,
.categories li a {
  font-size: var(--text-sm);
  color: var(--color-blue);
  background-color: var(--color-mute);
  padding: 3px 8px 2px;
  border-radius: 4px;
}
.organizers li {
  font-size: var(--text-sm);
  color: var(--color-gray-300)
}
.event-card .btn-md {
  width: 100%;
}
@media screen and (min-width: 768px) {
  .event-card .btn-md {
    width: 200px;
  }
}

.content-card {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}
.content-card .card-header-img {
  background-color: var(--color-white);
  overflow: hidden;
}
.content-card .card-header {
  background-color: var(--color-white);
  padding: 24px;
}
.content-card .card-header-img + .card-header {
  border-top-left-radius: 0px;
  border-top-right-radius: 0px;
  padding: 24px 24px;
}
.content-card .card-body {
  background-color: var(--color-white);
  padding: 24px 24px;
  border-top: 1px solid var(--color-gray-50);
}
.content-card .card-footer {
  position: sticky;
  bottom: 0;
  background-color: var(--color-white);
  padding: 24px 24px;
  border-top: 1px solid var(--color-gray-50);
}

@media screen and (min-width: 768px) {
  .content-card .card-header-img {
    border-top-left-radius: 12px;
    border-top-right-radius: 12px;
  }
  .content-card .card-header {
    border-top-left-radius: 12px;
    border-top-right-radius: 12px;
  }
  .content-card .card-header-img + .card-header {
    border-top-left-radius: 0px;
    border-top-right-radius: 0px;
  }
  .content-card .card-footer {
    border-bottom-left-radius: 12px;
    border-bottom-right-radius: 12px;
  }
}

/* calendar */
/* 修改 FullCalendar 預設的藍色以符合你的設計 */
:root {
  --fc-event-bg-color: transparent;
  --fc-event-border-color: transparent;
  --fc-event-text-color: var(--color-black);
  --fc-today-bg-color: var(--color-blue);
  --fc-border-color: #ddd;
  --fc-button-bg-color: var(--color-gray-500);
  --fc-button-border-color: var(--color-gray-500);
  --fc-button-text-color: var(--color-mute);
  --fc-button-hover-bg-color: var(--color-gray-600);
  --fc-button-hover-border-color: var(--color-gray-600);
  --fc-button-hover-text-color: var(--color-mute);
  --fc-button-active-bg-color: var(--color-gray-900);
  --fc-button-active-border-color: var(--color-gray-900);
}

/* 簡單調整日曆高度與風格 */
#calendar-container {
  max-width: 860px;
  margin: 40px auto;
  padding: 8px;
  background-color: var(--color-mute);
  border-radius: 8px;
}
.fc-view {
  border: 1px solid var(--fc-border-color);
  border-radius: 6px;
}
.fc .fc-toolbar.fc-header-toolbar {
  margin-bottom: 0.5em;
}
.fc .fc-toolbar-title {
  font-size: 1.425em;
}
.fc .fc-toolbar.fc-header-toolbar {
  flex-wrap: wrap;
}
.fc .fc-toolbar-chunk:nth-of-type(2) {
  order: 3;
  width: 100%;
  text-align: center;
}
.fc .fc-view {
  overflow-x: auto;
}
.fc .fc-scrollgrid {
  min-width: 720px;
}
@media screen and (min-width: 768px ) {
  .fc .fc-view {
    overflow-x: initial;
  }
}
/* 自定義週檢視下的活動樣式 */
.custom-event {
  padding: 4px 8px;
  background-color: var(--color-white); /* 淺色背景 */
  border-left: 3px solid var(--color-blue); /* 左側邊條 */
  color: #333;
  font-size: 0.85em;
  white-space: normal; /* 允許標題斷行 */
}
.fc-event-main {
  overflow: hidden;
}
.fc-daygrid-event {
  overflow: hidden;
  border-radius: 0;
}
.fc-dayGridMonth-view .custom-event {
  white-space: nowrap;
  overflow: hidden;
}
.fc-dayGridWeek-view .fc-event-title {
  white-space: wrap;
}
.fc-daygrid-dot-event {
  flex-wrap: wrap;
}
.fc-theme-standard td, .fc-theme-standard th {
}
.fc .fc-scrollgrid-section > * {
  border: 0;
}
.fc-theme-standard .fc-scrollgrid {
  border: 0;
}
.fc .fc-daygrid-day.fc-day-today {
  color: white;
}

/* 當 active 類別存在時的樣式 */
.view-section.active {
  position: relative;
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* news */
.news-card {
  background-color: var(--color-white);
  padding: 18px 24px 10px;
  border-radius: 12px;
}
.read-more {
  font-size: var(--text-sm);
  color: var(--color-blue);
  background: var(--color-white);
}