/* ====================== */
/* Калькулятор – плавающее окно */
/* ====================== */

.calc {
   position: fixed;
   z-index: 97; /* поверх просмотрщика PDF – чтобы считать, не закрывая документ */

   width: 360px;
   max-width: calc(100vw - 16px);
   max-height: calc(100vh - 16px);
   display: flex;
   flex-direction: column;

   background-color: #2B2B2B;
   border: 1px solid #5c5c5c;
   border-radius: 14px;
   box-shadow: 0 18px 50px rgba(0, 0, 0, .55);

   font-family: 'Open Sans Regular', sans-serif;
   font-size: 14px;
   color: #E3E3E3;
}

.calc[hidden] {
   display: none;
}

.calc--dragging {
   box-shadow: 0 24px 60px rgba(0, 0, 0, .7);
   user-select: none;
}

.calc__head {
   display: flex;
   align-items: center;
   justify-content: space-between;

   padding: 12px 12px 12px 18px;

   background-color: #4A4A4A;
   border-bottom: 1px solid rgba(229, 111, 37, .35);
   border-radius: 14px 14px 0 0;

   cursor: grab;
   touch-action: none;
}

.calc--dragging .calc__head {
   cursor: grabbing;
}

.calc__title {
   font-family: 'Raleway SemiBold', sans-serif;
   font-size: 16px;
   color: #E56F25;
}

.calc__close {
   width: 28px;
   height: 28px;

   font-size: 22px;
   line-height: 1;
   color: #E3E3E3;

   background: none;
   border: none;
   border-radius: 7px;
   cursor: pointer;
}

@media (any-hover: hover) {
   .calc__close:hover {
      background-color: #E56F25;
      color: #FFFFFF;
   }
}

.calc__cat {
   padding: 14px 18px 0;
}

.calc__select,
.calc__input {
   width: 100%;
   height: 36px;
   padding: 0 12px;

   font-family: 'Raleway Regular', sans-serif;
   font-size: 14px;
   color: #E3E3E3;

   background-color: #353535;
   border: 1px solid #5c5c5c;
   border-radius: 8px;
   outline: none;
}

.calc__select:focus,
.calc__input:focus {
   border-color: #E56F25;
}

.calc__select {
   padding-right: 32px;
   cursor: pointer;

   -webkit-appearance: none;
   appearance: none;
   background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23E3E3E3' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
   background-repeat: no-repeat;
   background-position: right 12px center;
   background-size: 12px 8px;
}

.calc__select--cat {
   font-family: 'Raleway Medium', sans-serif;
   color: #FFFFFF;
   background-color: #E56F25;
   border-color: #E56F25;
   background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23FFFFFF' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

@media (any-hover: hover) {
   .calc__select--cat:hover {
      background-color: #d15f17;
      border-color: #d15f17;
   }
}

.calc__body {
   padding: 12px 18px 4px;
   overflow-y: auto;
   min-height: 0;

   /* Светлая полоса прокрутки – на тёмном фоне окна */
   scrollbar-width: thin;
   scrollbar-color: #8D8D8D #2B2B2B;
}

.calc__body::-webkit-scrollbar {
   width: 8px;
}

.calc__body::-webkit-scrollbar-track {
   background: #2B2B2B;
}

.calc__body::-webkit-scrollbar-thumb {
   background-color: #8D8D8D;
   border-radius: 4px;
   border: 2px solid #2B2B2B;
}

.calc__body::-webkit-scrollbar-thumb:hover {
   background-color: #B3B3B3;
}

.calc__field {
   display: block;
   margin-bottom: 10px;
}

.calc__label {
   display: block;
   margin-bottom: 5px;

   font-family: 'Raleway Regular', sans-serif;
   font-size: 12px;
   color: #B3B3B3;
}

.calc__input {
   font-family: 'Open Sans SemiBold', sans-serif;
   font-size: 16px;
}

.calc__results {
   margin-top: 6px;
   border-top: 1px solid #4A4A4A;
}

.calc__row {
   display: flex;
   align-items: baseline;
   justify-content: space-between;
   gap: 12px;

   padding: 7px 0;
   border-bottom: 1px solid #3a3a3a;
}

.calc__row--muted {
   color: #8D8D8D;
}

.calc__row-label {
   font-size: 13px;
}

.calc__row-value {
   flex: none;
   max-width: 55%;

   font-family: 'Open Sans SemiBold', sans-serif;
   font-size: 14px;
   color: #FDFDFD;
   text-align: right;
   overflow-wrap: anywhere;
   font-variant-numeric: tabular-nums;

   cursor: copy;
   border-radius: 5px;
   transition: background-color .15s linear;
}

.calc__row--muted .calc__row-value {
   color: #B3B3B3;
}

@media (any-hover: hover) {
   .calc__row-value:hover {
      color: #E56F25;
   }
}

.calc__row-value--copied {
   background-color: rgba(112, 203, 41, .25);
}

.calc__note {
   margin: 8px 0 0;

   font-size: 12px;
   color: #E5B825;
}

.calc__resize {
   position: absolute;
   left: 0;
   right: 0;
   bottom: -4px;
   height: 10px;
   cursor: ns-resize;
   touch-action: none;
}

.calc__resize::after {
   content: "";
   position: absolute;
   left: 50%;
   bottom: 6px;
   width: 36px;
   height: 3px;
   transform: translateX(-50%);

   border-radius: 2px;
   background-color: #5c5c5c;
   transition: background-color .15s linear;
}

.calc--resizing .calc__resize::after {
   background-color: #E56F25;
}

@media (any-hover: hover) {
   .calc__resize:hover::after {
      background-color: #E56F25;
   }
}

.calc--resizing {
   user-select: none;
}

.calc__foot {
   display: flex;
   align-items: center;
   gap: 12px;

   padding: 10px 18px 14px;
   border-top: 1px solid #4A4A4A;
}

.calc__clear {
   flex: none;
   height: 30px;
   padding: 0 14px;

   font-family: 'Raleway Medium', sans-serif;
   font-size: 13px;
   color: #E3E3E3;

   background-color: #3a3a3a;
   border: 1px solid #5c5c5c;
   border-radius: 8px;
   cursor: pointer;
}

@media (any-hover: hover) {
   .calc__clear:hover {
      border-color: #E56F25;
      color: #FFFFFF;
   }
}

.calc__hint {
   font-size: 11px;
   line-height: 1.3;
   color: #8D8D8D;
}

@media (max-width: 480px) {
   .calc {
      width: calc(100vw - 16px);
   }
}

/* ======== 2K+ и 4K: плавающее окно крупнее ======== */
@media (min-width: 2560px) {
   .calc {
      width: 460px;
      font-size: 16px;
   }

   .calc__title {
      font-size: 19px;
   }

   .calc__close {
      width: 34px;
      height: 34px;
      font-size: 26px;
   }

   .calc__select,
   .calc__input {
      height: 44px;
      font-size: 16px;
   }

   .calc__input {
      font-size: 18px;
   }

   .calc__label {
      font-size: 14px;
   }

   .calc__row-label {
      font-size: 15px;
   }

   .calc__row-value {
      font-size: 16px;
   }

   .calc__note {
      font-size: 14px;
   }

   .calc__clear {
      height: 36px;
      font-size: 15px;
   }

   .calc__hint {
      font-size: 13px;
   }
}

/* 4K на 100% масштаба */
@media (min-width: 3400px) {
   .calc {
      width: 560px;
      font-size: 18px;
   }

   .calc__title {
      font-size: 22px;
   }

   .calc__close {
      width: 40px;
      height: 40px;
      font-size: 30px;
   }

   .calc__select,
   .calc__input {
      height: 50px;
      font-size: 18px;
   }

   .calc__input {
      font-size: 21px;
   }

   .calc__label {
      font-size: 16px;
   }

   .calc__row-label {
      font-size: 17px;
   }

   .calc__row-value {
      font-size: 19px;
   }

   .calc__note {
      font-size: 16px;
   }

   .calc__clear {
      height: 40px;
      font-size: 17px;
   }

   .calc__hint {
      font-size: 15px;
   }
}