/*
 This file is part of GNU Taler
 (C) 2021 Taler Systems S.A.

 GNU Taler is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software
 Foundation; either version 3, or (at your option) any later version.

 GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

 You should have received a copy of the GNU General Public License along with
 GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

:root {
  --primary-color: #3298dc;
  
  --primary-text-color-dark: rgba(0,0,0,.87);
  --secondary-text-color-dark: rgba(0,0,0,.57);
  --disabled-text-color-dark: rgba(0,0,0,.13);
  
  --primary-text-color-light: rgba(255,255,255,.87);
  --secondary-text-color-light: rgba(255,255,255,.57);
  --disabled-text-color-light: rgba(255,255,255,.13);
  
  --font-stack: 'Roboto', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  
  --primary-card-color: #fff;
  --primary-background-color: #f2f2f2;
  
  --box-shadow-lvl-1: 0 1px 3px rgba(0, 0, 0, 0.12),
                      0 1px 2px rgba(0, 0, 0, 0.24);
  --box-shadow-lvl-2: 0 3px 6px rgba(0, 0, 0, 0.16),
                      0 3px 6px rgba(0, 0, 0, 0.23);
  --box-shadow-lvl-3: 0 10px 20px rgba(0, 0, 0, 0.19),
                      0 6px 6px rgba(0, 0, 0, 0.23);
  --box-shadow-lvl-4: 0 14px 28px rgba(0, 0, 0, 0.25),
                      0 10px 10px rgba(0, 0, 0, 0.22);
}


.datePicker {
  text-align: left;
  background: var(--primary-card-color);
  border-radius: 3px;
  z-index: 200;
  position: fixed;
  height: auto;
  max-height: 90vh;
  width: 90vw;
  max-width: 448px;
  transform-origin: top left;
  transition: transform .22s ease-in-out, opacity .22s ease-in-out;
  top: 50%;
  left: 50%;
  opacity: 0;
  transform: scale(0) translate(-50%, -50%);
  user-select: none;

  &.datePicker--opened {
    opacity: 1;
    transform: scale(1) translate(-50%, -50%);
  }
  
  .datePicker--titles {
    border-top-left-radius: 3px;
    border-top-right-radius: 3px;
    padding: 24px;
    height: 100px;
    background: var(--primary-color);

    h2, h3 {
      cursor: pointer;
      color: #fff;
      line-height: 1;
      padding: 0;
      margin: 0;
      font-size: 32px;
    }

    h3 {
      color: rgba(255,255,255,.57);
      font-size: 18px;
      padding-bottom: 2px;
    }
  }

  nav {
    padding: 20px;
    height: 56px;

    h4 {
      width: calc(100% - 60px);
      text-align: center;
      display: inline-block;
      padding: 0;
      font-size: 14px;
      line-height: 24px;
      margin: 0;
      position: relative;
      top: -9px;
      color: var(--primary-text-color);
    }

    i {
      cursor: pointer;
      color: var(--secondary-text-color);
      font-size: 26px;
      user-select: none;
      border-radius: 50%;
      
      &:hover {
        background: var(--disabled-text-color-dark);
      }
    }
  }
  
  .datePicker--scroll {
    overflow-y: auto;
    max-height: calc(90vh - 56px - 100px);
  }

  .datePicker--calendar {
    padding: 0 20px;

    .datePicker--dayNames {
      width: 100%;
      display: grid;
      text-align: center;
      
      // there's probably a better way to do this, but wanted to try out CSS grid
      grid-template-columns: calc(100% / 7) calc(100% / 7) calc(100% / 7) calc(100% / 7) calc(100% / 7) calc(100% / 7) calc(100% / 7);

      span {
        color: var(--secondary-text-color-dark);
        font-size: 14px;
        line-height: 42px;
        display: inline-grid;
      }
    }

    .datePicker--days {
      width: 100%;
      display: grid;
      text-align: center;
      grid-template-columns: calc(100% / 7) calc(100% / 7) calc(100% / 7) calc(100% / 7) calc(100% / 7) calc(100% / 7) calc(100% / 7);

      span {
        color: var(--primary-text-color-dark);
        line-height: 42px;
        font-size: 14px;
        display: inline-grid;
        transition: color .22s;
        height: 42px;
        position: relative;
        cursor: pointer;
        user-select: none;
        border-radius: 50%;

        &::before {
          content: '';
          position: absolute;
          z-index: -1;
          height: 42px;
          width: 42px;
          left: calc(50% - 21px);
          background: var(--primary-color);
          border-radius: 50%;
          transition: transform .22s, opacity .22s;
          transform: scale(0);
          opacity: 0;
        }
        
        &[disabled=true] {
          cursor: unset;
        }

        &.datePicker--today {
          font-weight: 700;
        }

        &.datePicker--selected {
          color: rgba(255,255,255,.87);

          &:before {
            transform: scale(1);
            opacity: 1;
          }
        }
      }
    }
  }
  
  .datePicker--selectYear {
    padding: 0 20px;
    display: block;
    width: 100%;
    text-align: center;
    max-height: 362px;
    
    span {
      display: block;
      width: 100%;
      font-size: 24px;
      margin: 20px auto;
      cursor: pointer;
      
      &.selected {
        font-size: 42px;
        color: var(--primary-color);
      }
    }
  }

  div.datePicker--actions {
    width: 100%;
    padding: 8px;
    text-align: right;

    button {
      margin-bottom: 0;
      font-size: 15px;
      cursor: pointer;
      color: var(--primary-text-color);
      border: none;
      margin-left: 8px;
      min-width: 64px;
      line-height: 36px;
      background-color: transparent;
      appearance: none;
      padding: 0 16px;
      border-radius: 3px;
      transition: background-color .13s;

      &:hover, &:focus {
        outline: none;
        background-color: var(--disabled-text-color-dark);
      }
    }
  }
}

.datePicker--background {
  z-index: 199;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: rgba(0,0,0,.52);
  animation: fadeIn .22s forwards;
}