:root {

  
    --primary: #76aeee; 
    --on-primary: #100E17; 
    --background: #131214;
    --on-background: #EAE6F2;
    --surface: #1D1C1F;
    --on-surface: #DDDAE5;
    --on-surface-variant: #7B7980; 
    --on-surface-variant-2: #B9B6BF;
    --outline: #3E3D40;
    --bg-aqi-1: #89E589;
    --on-bg-aqi-1: #1F331F;
    --bg-aqi-2: #E5DD89;
    --on-bg-aqi-2: #33311F;
    --bg-aqi-3: #E5C089;
    --on-bg-aqi-3: #332B1F;
    --bg-aqi-4: #E58989;
    --on-bg-aqi-4: #331F1F;
    --bg-aqi-5: #E589B7;
    --on-bg-aqi-5: #331F29;
    --white: hsl(0, 0%, 100%);
    --white-alpha-4: hsla(0, 0%, 100%, 0.04);
    --white-alpha-8: hsla(0, 0%, 100%, 0.08);
    --black-alpha-10: hsla(0, 0%, 0%, 0.1);
  
    /* gradient colors */
    --gradient-1: linear-gradient(180deg, hsla(270, 5%, 7%, 0) 0%, hsla(270, 5%, 7%, 0.8) 65%, hsl(270, 5%, 7%) 100%);
    --gradient-2: linear-gradient(180deg, hsla(260, 5%, 12%, 0) 0%, hsla(260, 5%, 12%, 0.8) 65%, hsl(260, 5%, 12%) 100%);
  
    /*TYPOGRAPHY*/
  
    /* font family */
    --ff-nunito-sans: 'Nunito Sans', sans-serif;
  
    /* font size */
    --heading: 5.6rem;
    --title-1: 2rem;
    --title-2: 1.8rem;
    --title-3: 1.6rem;
    --body-1: 2.2rem;
    --body-2: 2rem;
    --body-3: 1.6rem;
    --label-1: 1.4rem;
    --label-2: 1.2rem;
  
    /* font weight */
    --weight-regular: 400;
    --weight-semiBold: 600;
  
    /**
     * BOX SHADOW
     */
  
    --shadow-1: 0px 1px 3px hsla(0, 0%, 0%, 0.5);
    --shadow-2: 0px 3px 6px hsla(0, 0%, 0%, 0.4);
  
    /*BORDER RADIUS*/
  
    --radius-28: 28px;
    --radius-16: 16px;
    --radius-pill: 500px;
    --radius-circle: 50%;
  
    /*TRANSITION*/
  
    --transition-short: 100ms ease;
  
  }
  
  
  
  
  
  /* #RESET*/
  
  *,
  *::before,
  *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  li { list-style: none; }
  
  a,
  img,
  span,
  input,
  button { display: block; }
  
  a {
    color: inherit;
    text-decoration: none;
  }
  
  img { height: auto; }
  
  input,
  button {
    background: none;
    border: none;
    color: inherit;
    font: inherit;
  }
  
  input { width: 100%; }
  
  button { cursor: pointer; }
  
  sub { vertical-align: baseline; }
  
  sup { vertical-align: top; }
  
  sub, sup { font-size: 0.75em; }
  
  html {
    font-family: var(--ff-nunito-sans);
    font-size: 10px;
    scroll-behavior: smooth;
  }
  
  body {
    background-color: var(--background);
    color: var(--on-background);
    font-size: var(--body-3);
    overflow: hidden;
  }
  
  :focus-visible {
    outline: 2px solid var(--white);
    outline-offset: 2px;
  }
  
  ::selection { background-color: var(--white-alpha-8); }
  
  ::-webkit-scrollbar {
    width: 6px;
    height: 6px; /* for horizontal scrollbar */
  }
  
  ::-webkit-scrollbar-thumb {
    background-color: var(--white-alpha-8);
    border-radius: var(--radius-pill);
  }
  
  
  
  
  
  /*#MATERIAL ICON*/
  
  @font-face {
    font-family: 'Material Symbols Rounded';
    font-style: normal;
    font-weight: 400;
    src: url(../font/material-symbol-rounded.woff2) format('woff2');
  }
  
  .m-icon {
    font-family: 'Material Symbols Rounded';
    font-weight: normal;
    font-style: normal;
    font-size: 2.4rem;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    font-feature-settings: 'liga';
    -webkit-font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
    height: 1em;
    width: 1em;
    overflow: hidden;
  }
  

  
  .container {
    max-width: 1600px;
    width: 100%;
    margin-inline: auto;
    padding: 16px;
  }
  
  .icon-btn {
    background-color: var(--white-alpha-8);
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-circle);
  }
  
  .has-state { position: relative; }
  
  .has-state:hover { box-shadow: var(--shadow-1); }
  
  .has-state:is(:focus, :focus-visible) { box-shadow: none; }
  
  .has-state::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    clip-path: circle(100% at 50% 50%);
    transition: var(--transition-short);
  }
  
  .has-state:hover::before { background-color: var(--white-alpha-4); }
  
  .has-state:is(:focus, :focus-visible)::before {
    background-color: var(--white-alpha-8);
    animation: ripple 250ms ease forwards;
  }
  
  @keyframes ripple {
    0% { clip-path: circle(0% at 50% 50%); }
    100% { clip-path: circle(100% at 50% 50%); }
  }
  
  .btn-primary {
    background-color: var(--primary);
    color: var(--on-primary);
    height: 48px;
    line-height: 48px;
    max-width: max-content;
    display: flex;
    align-items: center;
    gap: 16px;
    padding-inline: 16px;
    border-radius: var(--radius-pill);
  }
  
  .btn-primary .span { font-weight: var(--weight-semiBold); }
  
  .btn-primary[disabled] {
    background-color: var(--outline);
    color: var(--on-surface-variant);
    cursor: not-allowed;
  }
  
  .btn-primary[disabled]::before { display: none; }
  
  .card {
    background-color: var(--surface);
    color: var(--on-surface);
  }
  
  .card-lg {
    border-radius: var(--radius-28);
    padding: 20px;
  }
  
  .card-sm {
    border-radius: var(--radius-16);
    padding: 16px;
  }
  
  .heading {
    color: var(--white);
    font-size: var(--heading);
    line-height: 1.1;
  }
  
  .title-1 { font-size: var(--title-1); }
  
  .title-2 {
    font-size: var(--title-2);
    margin-block-end: 12px;
  }
  
  .title-3 {
    font-size: var(--title-3);
    font-weight: var(--weight-semiBold);
  }
  
  .body-1 { font-size: var(--body-1); }
  
  .body-2 {
    font-size: var(--body-2);
    font-weight: var(--weight-semiBold);
  }
  
  .body-3 { font-size: var(--body-3); }
  
  .label-1 { font-size: var(--label-1); }
  
  .label-2 { font-size: var(--label-2); }
  
  .fade-in { animation: fade-in 250ms ease forwards; }
  
  @keyframes fade-in {
    0% { opacity: 0; }
    100% { opacity: 1; }
  }
  
  
  
  
  
  /*#HEADER*/
  
  .header .btn-primary .span { display: none; }
  
  .logo img { width: 150px; }
  
  .header .container,
  .header-actions {
    display: flex;
    align-items: center;
  }
  
  .header .container { justify-content: space-between; }
  
  .header-actions { gap: 16px; }
  
  .header .btn-primary { padding-inline: 12px; }
  
  .search-view {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    height: 100svh; /* for mobile browser */
    background-color: var(--surface);
    color: var(--on-surface);
    clip-path: circle(4% at calc(100% - 102px) 5%);
    opacity: 0;
    visibility: hidden;
    z-index: 4;
    transition: clip-path 500ms ease;
  }
  
  .search-view.active {
    opacity: 1;
    visibility: visible;
    clip-path: circle(130% at 73% 5%);
  }
  
  .search-wrapper {
    position: relative;
    border-block-end: 1px solid var(--outline);
  }
  
  .search-wrapper::before {
    content: "";
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: 16px;
    width: 24px;
    height: 24px;
    border: 3px solid var(--on-surface);
    border-block-start-color: transparent;
    border-radius: var(--radius-circle);
    animation: loading 500ms linear infinite;
    display: none;
  }
  
  @keyframes loading {
    0% { transform: translateY(-50%) rotate(0); }
    100% { transform: translateY(-50%) rotate(1turn); }
  }
  
  .search-wrapper:has(.searching)::before { display: block; }
  
  .search-field {
    height: 80px;
    line-height: 80px;
    padding-inline: 56px 16px;
    outline: none;
  }
  
  .search-field::placeholder { color: var(--on-surface-variant-2); }
  
  .search-field::-webkit-search-cancel-button { display: none; }
  
  .search-wrapper .leading-icon {
    position: absolute;
    top: 50%;
    left: 28px;
    transform: translate(-50%, -50%);
  }
  
  .search-wrapper > .m-icon { display: none; }
  
  .search-wrapper .icon-btn {
    background-color: transparent;
    box-shadow: none;
  }
  
  .search-view .view-list { padding-block: 8px 16px; }
  
  .search-view .view-item {
    position: relative;
    height: 56px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 16px;
    padding-inline: 16px 24px;
  }
  
  .search-view .view-item :is(.m-icon, .item-subtitle) {
    color: var(--on-surface-variant);
  }
  
  .search-view .view-item .item-link {
    position: absolute;
    inset: 0;
    box-shadow: none;
  }
  
  
  
  
  
  /*#MAIN*/
  
  main {
    height: calc(100vh - 80px);
    height: calc(100svh - 80px); /* for mobile browser */
    overflow: hidden;
  }
  
  article.container {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    height: 100%;
    overflow-y: auto; /* for firefox */
    overflow-y: overlay;
  }
  
  article.container::-webkit-scrollbar-thumb { background-color: transparent; }
  
  article.container:is(:hover, :focus-within)::-webkit-scrollbar-thumb {
    background-color: var(--white-alpha-8);
  }
  
  article.container::-webkit-scrollbar-button { height: 10px; }
  
  article.container::before {
    content: "";
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40px;
    background-image: var(--gradient-1);
    pointer-events: none;
    z-index: 1;
  }
  
  .section:not(:last-child) { margin-block-end: 16px; }
  
  
  
  
  
  /*#CURRENT WEATHER*/
  
  .current-weather-card .weapper {
    margin-block: 12px;
    display: flex;
    gap: 8px;
    align-items: center;
  }
  
  .current-weather-card .weather-icon { margin-inline: auto; }
  
  .current-weather-card > .body-3 { text-transform: capitalize; }
  
  .current-weather-card .meta-list {
    margin-block-start: 16px;
    padding-block-start: 16px;
    border-block-start: 1px solid var(--outline);
  }
  
  .current-weather-card .meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
  }
  
  .current-weather-card .meta-item:not(:last-child) {
    margin-block-end: 12px;
  }
  
  .current-weather-card .meta-text { color: var(--on-surface-variant); }
  
  
  
  
  
  /*#HIGHLIGHTS*/
  
  .forecast-card .title-2 { margin-block-end: 0; }
  
  .forecast-card :is(.card-item, .icon-wrapper) {
    display: flex;
    align-items: center;
  }
  
  .forecast-card .card-item:not(:last-child) { margin-block-end: 12px; }
  
  .forecast-card .icon-wrapper { gap: 8px; }
  
  .forecast-card .label-1 {
    color: var(--on-surface-variant);
    font-weight: var(--weight-semiBold);
  }
  
  .forecast-card .card-item > .label-1 {
    width: 100%;
    text-align: right;
  }
  
  
  
  
  
  /*#HOURLY FORECAST*/
  
  .highlights .m-icon { font-size: 3.2rem; }
  
  .highlight-list {
    display: grid;
    gap: 20px;
  }
  
  .highlight-list .title-3 {
    color: var(--on-surface-variant);
    margin-block-end: 20px;
  }
  
  .highlights .card-sm {
    background-color: var(--black-alpha-10);
    position: relative;
  }
  
  .highlight-card :is(.wrapper, .card-list, .card-item) {
    display: flex;
    align-items: center;
  }
  
  .highlight-card .wrapper {
    justify-content: space-between;
    gap: 16px;
  }
  
  .highlight-card .card-list {
    flex-wrap: wrap;
    flex-grow: 1;
    row-gap: 8px;
  }
  
  .highlight-card .card-item {
    width: 50%;
    justify-content: flex-end;
    gap: 4px;
  }
  
  .highlight-card .label-1 { color: var(--on-surface-variant); }
  
  .badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 2px 12px;
    border-radius: var(--radius-pill);
    font-weight: var(--weight-semiBold);
    cursor: help;
  }
  
  .badge.aqi-1 {
    background-color: var(--bg-aqi-1);
    color: var(--on-bg-aqi-1);
  }
  
  .badge.aqi-2 {
    background-color: var(--bg-aqi-2);
    color: var(--on-bg-aqi-2);
  }
  
  .badge.aqi-3 {
    background-color: var(--bg-aqi-3);
    color: var(--on-bg-aqi-3);
  }
  
  .badge.aqi-4 {
    background-color: var(--bg-aqi-4);
    color: var(--on-bg-aqi-4);
  }
  
  .badge.aqi-5 {
    background-color: var(--bg-aqi-5);
    color: var(--on-bg-aqi-5);
  }
  
  .highlight-card.two .card-item {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 8px 16px;
  }
  
  .highlight-card.two .label-1 { margin-block-end: 4px; }
  
  
  
  
  
  /*#FORECAST*/
  
  .slider-container {
    overflow-x: auto;
    margin-inline: -16px;
  }
  
  .slider-container::-webkit-scrollbar { display: none; }
  
  .slider-list {
    display: flex;
    gap: 12px;
  }
  
  .slider-list:first-child { margin-block-end: 16px; }
  
  .slider-list::before,
  .slider-list::after {
    content: "";
    min-width: 4px;
  }
  
  .slider-item {
    min-width: 110px;
    flex: 1 1 100%;
  }
  
  .slider-card { text-align: center; }
  
  .slider-item .weather-icon {
    margin-inline: auto;
    margin-block: 12px;
  }
  
  
  
  
  
  /*#FOOTER*/
  
  .footer,
  .footer .body-3:last-child {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
  }
  
  .footer {
    color: var(--on-surface-variant);
    text-align: center;
    gap: 12px 24px;
    margin-block-start: 28px;
    display: none;
  }
  
  .fade-in .footer { display: flex; }
  
  .footer .body-3:last-child { gap: 6px; }
  
  
  
  
  
  /*#LOADING*/
  
  .loading {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--background);
    place-items: center;
    z-index: 1;
    display: none;
  }
  
  .loading::before {
    content: "";
    width: 48px;
    height: 48px;
    border: 4px solid var(--on-background);
    border-block-start-color: transparent;
    border-radius: var(--radius-circle);
    animation: loading 500ms linear infinite;
  }
  
  
  
  
  
  /*#ERROR SECTION*/
  
  .error-content {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    height: 100svh; /* for mobile browser */
    background-color: var(--background);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    display: none;
    z-index: 8;
  }
  
  .error-content .btn-primary { margin-block-start: 20px; }
  
  
  
  @media (min-width: 768px) {
  
    /*REUSED STYLE*/
  
    .container { padding: 24px; }
  
    .title-1 { --title-1: 2.4rem; }
  
    .section > .title-2 { margin-block-end: 16px; }
  
    .card-lg { padding: 24px; }
  
    .card-sm {
      padding: 20px;
      display: grid;
      grid-template-rows: min-content 1fr;
    }
  
    .badge {
      top: 20px;
      right: 20px;
    }
  
  
  
    /*HEADER*/
  
    .header-actions { gap: 24px; }
  
    .header .btn-primary { padding-inline: 16px 24px; }
  
    .header .btn-primary .span { display: block; }
  
    .search-view { clip-path: circle(3% at calc(100% - 273px) 6%); }
  
  
  
    /*MAIN*/
  
    main {
      height: calc(100vh - 96px);
      height: calc(100svh - 96px);
    }
  
    article.container {
      padding-block-start: 0;
      grid-template-columns: 280px minmax(0, 1fr);
      align-items: flex-start;
      gap: 24px;
    }
  
    .content-left {
      position: sticky;
      top: 0;
    }
  
    .section:not(:last-child) { margin-block: 20px; }
  
    .forecast-card .card-item:not(:last-child) {
      margin-block-end: 16px;
    }
  
    .highlight-list { grid-template-columns: 1fr 1fr; }
  
    .highlight-card:nth-child(-n+2) {
      grid-column: span 2;
      height: 160px;
    }
  
    .highlight-card:nth-child(n+3) { height: 120px; }
  
    .highlights .m-icon { font-size: 3.6rem; }
  
    .highlight-card.one .card-item {
      width: 25%;
      flex-direction: column-reverse;
      gap: 8px;
    }
  
    .slider-container {
      margin-inline: 0 -24px;
      border-bottom-left-radius: var(--radius-16);
      border-top-left-radius: var(--radius-16);
    }
  
    .slider-list::before { display: none; }
  
    .slider-list::after { min-width: 12px; }
  
    .hourly-forecast .card-sm { padding: 16px; }
  
  }
  
  
  
  
  
  /*responsive for large than 1200px screen*/
  
  @media (min-width: 1200px) {
  
    /*CUSTOM PROPERTY*/
  
    :root {
  
      /* font size */
      --heading: 8rem;
      --title-2: 2rem;
  
    }
  
  
  
    /*REUSED STYLE*/
  
    .container { padding: 40px; }
  
    .card-lg { padding: 36px; }
  
    .card-sm { padding: 24px; }
  
    .title-1 { --title-1: 3.6rem; }
  
    .highlight-card.two .card-item { column-gap: 24px; }
  
  
  
    /*HEADER*/
  
    .header .icon-btn { display: none; }
  
    .logo img { width: 200px; }
  
    .header {
      position: relative;
      height: 120px;
      z-index: 4;
    }
  
    .header .container {
      padding-block: 0;
      height: 100%;
    }
  
    .search-view,
    .search-view.active {
      all: unset;
      display: block;
      position: relative;
      width: 500px;
      animation: none;
    }
  
    .search-wrapper { border-block-end: none; }
  
    .search-wrapper > .m-icon { display: block; }
  
    .search-field,
    .search-view .view-list { background-color: var(--surface); }
  
    .search-field {
      height: 56px;
      border-radius: var(--radius-28);
    }
  
    .search-result,
    .search-view:not(:focus-within) .search-result { display: none; }
  
    .search-view:focus-within .search-result.active { display: block; }
  
    .search-view:has(.search-result.active):focus-within .search-field {
      border-bottom-left-radius: 0;
      border-bottom-right-radius: 0;
    }
  
    .search-view .view-list {
      position: absolute;
      top: 100%;
      left: 0;
      width: 100%;
      max-height: 360px;
      border-radius: 0 0 var(--radius-28) var(--radius-28);
      border-block-start: 1px solid var(--outline);
      overflow-y: auto; /* for firefox */
      overflow-y: overlay;
    }
  
    .search-view .view-list:empty { min-height: 120px; }
  
    .search-view .view-list::-webkit-scrollbar-button { height: 20px; }
  
    .search-view:is(:hover, :has(.view-list):hover) {
      filter: drop-shadow(var(--shadow-1));
    }
  
    .search-view:is(:focus-within, :has(.view-list):focus-within) {
      filter: drop-shadow(var(--shadow-2));
    }
  
  
  
    /*MAIN*/
  
    main {
      height: calc(100vh - 120px);
      height: calc(100svh - 120px);
    }
  
    article.container {
      grid-template-columns: 360px minmax(0, 1fr);
      gap: 40px;
    }
  
    .current-weather .weather-icon { width: 80px; }
  
    .forecast-card .title-2 { --title-2: 2.2rem; }
  
    .highlight-card:nth-child(-n+2) { height: 200px; }
  
    .highlight-card:nth-child(n+3) { height: 150px; }
  
    .highlight-card .m-icon { font-size: 4.8rem; }
  
    .slider-list { gap: 16px; }
  
  }
  
  
  
  
  
  /* responsive for large than 1400px screen */
  
  @media (min-width: 1400px) {
  
    .highlight-list { grid-template-columns: repeat(4, 1fr); }
  
  }