@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

:root {
  /* 全局變數設定 */
  --main-desktop-font-size: 30px;
  /* ! */
  --main-pad-font-size: calc(var(--main-desktop-font-size) * 4.8 / 6);
  --main-border-color: #111;
  --main-background-color: #fff;
  --main-text-color: #fff;
  --main-color: #03a8f4;
  --header-toggle-width: 30px;
  --header-pad-toggle-width: calc(var(--header-toggle-width) * 5 / 6);
  --footer-icon-width: 30px;
  --footer-margin-right: 30px;
  --footer-pad-icon-width: calc(var(--footer-icon-width) * 5 / 6);
  --screen-desktop-padding-top-bottom: 50px;
  --screen-desktop-padding-left-right: 100px;
  --screen-pad-padding-top-bottom: 10px;
  --screen-pad-padding-left-right: 30px;

  --video-overlay-island-color: #054f7199;
  --video-overlay-spring-color: #054f716d;
  --video-overlay-summer-color: #054f714e;
  --video-overlay-autumn-color: #054f713a;
  --video-overlay-winter-color: #1098d785;

  --main-structure-max-width: 1920px;
  --text-description-h1-desktop-size: 3em;
  --text-description-h2-desktop-size: 2.5em;
  --text-description-p-desktop-size: 1em;
  --text-description-h1-pad-size: 2.5em;
  --text-description-h2-pad-size: 2em;
  --text-description-p-pad-size: 1em;

  --menu-width: 10em;
  --main-structure-left: 2em;
  --menu-margin-bottom: 1em;
}

* {
  box-sizing: border-box;
  /* ! */
  -webkit-user-drag: none;
}

html,
body {
  /* ! */
  all: unset;
  width: 100vw;
  min-height: 100vh;
  font-family: 'Poppins', sans-serif;
  font-size: var(--main-desktop-font-size);
  background-color: var(--main-background-color);
  color: var(--main-text-color);
}
.main-structure,
.main-structure header,
.main-structure .content,
.main-structure footer {
  width: 100%;
  /* 使用者無法選擇文字 */
  user-select: none;
  /* border: 5px dashed var(--main-border-color); */
}

.main-structure,
.asdie-menu {
  font-size: var(--main-desktop-font-size);
  line-height: 1em;
}

.main-structure {
  position: absolute;
  max-width: var(--main-desktop-max-width);
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  z-index: 1;
  transition: 0.5s;
  transform: perspective(5000px) translateX(0px) translateY(0) translateZ(0)
    rotateX(0deg) rotateY(0) rotateZ(0);
}

.main-structure.active {
  width: calc(100% - var(--menu-width)- var(--main-structure-left));
  height: calc(100vh -2 * var(--main-structure-left));
  top: var(--main-structure-left);
  right: var(--menu-width);
  left: var(--main-structure-left);
  bottom: var(--main-structure-left);
  overflow: hidden;
  border-radius: 10px;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
  transform: perspective(5000px) translateX(0px) translateY(0) translateZ(0)
    rotateX(0deg) rotateY(20deg) rotateZ(0);
}

.main-structure header,
.main-structure footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.main-structure header .menu-logo {
  width: var(--header-toggle-width);
  height: var(--header-toggle-width);
  background: url(./src/icons/menu.svg);
  background-repeat: no-repeat;
  background-position: center;
  background-size: var(--header-toggle-width);
  /* ! 顏色反轉用 */
  filter: invert(1);
}
.main-structure header .menu-logo:hover {
  /* 因為原本 已經被 filter 反轉了 所以這裡用黑色 後續也反轉成白色*/
  border: 2px solid black;
  padding: 5px;
  border-radius: 50%;
  animation: menu_logo ease-in 1s infinite;
}
.main-structure header .menu-logo.active {
  background: url(./src/icons/close.svg);
  background-repeat: no-repeat;
  background-position: center;
  background-size: var(--header-toggle-width);
}

.main-structure header a {
  /* ! 忘了要複習一下 */
  display: inline-block;
  text-decoration: none;
  color: var(--main-text-color);
  transition: 0.2s;
}

.main-structure header a:hover {
  transform: scale(1.2);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.main-structure header,
.main-structure .content,
.main-structure footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--screen-desktop-padding-top-bottom)
    var(--screen-desktop-padding-left-right);
  /* 針對 RWD的效果做秒數柔化 */
  transition: 0.5s;
}
.main-structure footer {
  justify-content: flex-start;
}
/* ! 表示最後一個不要有的屬性(前兩個會有) */
.main-structure footer a:not(:last-child) {
  margin-right: var(--footer-margin-right);
}

.main-structure footer a img {
  width: var(--footer-icon-width);
  filter: invert(1);
  transition: 0.5s;
}
.main-structure footer a img:hover {
  transform: translateY(-5px);
}

/* 依照比例在中央 */
.main-structure .content video,
.main-structure .content .video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  transition: 1s;
}
/* ! 這是甚麼鬼??? */
.main-structure .content video {
  object-fit: cover;
  clip-path: ellipse(0% 0% at 0% 50%);
  padding: 0;
  margin: 0;
}
/* ! 這是甚麼鬼??? */
.main-structure .content video.active {
  clip-path: ellipse(150% 70% at 0% 50%);
}

/* ! 遮罩處理 */
.main-structure .content .video-overlay {
  mix-blend-mode: overlay;
}
.main-structure .content .video-overlay-island {
  background: var(--video-overlay-island-color);
}
.main-structure .content .video-overlay-spring {
  background: var(--video-overlay-spring-color);
}
.main-structure .content .video-overlay-summer {
  background: var(--video-overlay-summer-color);
}
.main-structure .content .video-overlay-autumn {
  background: var(--video-overlay-autumn-color);
}
.main-structure .content .video-overlay-winter {
  background: var(--video-overlay-winter-color);
}

/* ! 文案 */
.content .text-description h1,
.content .text-description h2,
.content .text-description p {
  margin: 0;
  padding: 0;
}

.content .text-description h1,
.content .text-description h2 {
  text-transform: uppercase;
}

.content .text-description h1 {
  font-size: var(--text-description-h1-desktop-size);
  line-height: 1em;
}

.content .text-description h2 {
  font-size: var(--text-description-h2-desktop-size);
  line-height: 1em;
}

.content .text-description p {
  font-size: var(--text-description-p-desktop-size);
  line-height: 1.5em;
  max-width: 700px;
  min-width: 400px;
  margin: 3em 0;
}

.aside-menu a,
.content .text-description a {
  display: inline-block;
  text-decoration: none;
  border: 2px solid var(--main-background-color);
  color: var(--main-text-color);
  line-height: 1em;
  text-transform: uppercase;
  padding: 10px 30px;
  letter-spacing: 2px;
  border-radius: 30px;
  box-shadow: 1px 1px 8px rgba(0, 0, 0, 0.1),
    -1px -1px 8px rgba(255, 255, 255, 0.1);
  transition: 0.3s;
}
.aside-menu a:hover,
.content .text-description a:hover {
  color: var(--main-text-color);
  background-color: var(--main-color);
  letter-spacing: 5px;
}

.aside-menu {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: var(--menu-width);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.aside-menu a {
  border-color: var(--main-color);
  color: var(--main-color);
  min-width: calc(var(--menu-width) * 2 / 3);
  text-align: center;
}
.aside-menu a:not(:last-child) {
  margin-bottom: var(--menu-margin-bottom);
}

/* ! RWD */
@media (max-width: 1200px) {
  .aside-menu,
  .main-structure {
    font-size: var(--main-pad-font-size);
  }

  .main-structure header,
  .main-structure .content,
  .main-structure footer {
    padding: var(--screen-pad-padding-top-bottom)
      var(--screen-pad-padding-left-right);
  }

  .main-structure header .menu-logo {
    width: var(--header-toggle-width);
    height: var(--header-toggle-width);
    background-size: var(--header-pad-toggle-width);
  }

  .main-structure footer a img {
    width: var(--footer-pad-icon-width);
  }
}

.content .text-description h1 {
  font-size: var(--text-description-h1-pad-size);
  line-height: 1em;
}

.content .text-description h2 {
  font-size: var(--text-description-h2-pad-size);
  line-height: 1em;
}

.content .text-description p {
  font-size: var(--text-description-p-pad-size);
  line-height: 1.5em;
  max-width: 500px;
  min-width: 300px;
}

.main-structure.active {
  transform: perspective(5000px) translateX(0px) translateY(0) translateZ(0)
    rotateX(0deg) rotateY(30deg) rotateZ(0);
}

/* !動畫 */
@keyframes menu_logo {
  from,
  to {
    filter: invert(1);
    transform: scale(1);
  }
  50% {
    /* filter: (1); */
    transform: scale(1.2);
  }
}