html, body {
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    height: 100vh;
    background-color: var(--tg-theme-bg-color, #f3f4f6);
    font-family: Arial, sans-serif;
    color: var(--tg-theme-text-color, #000);
    transition: background-color 0.3s, color 0.3s;
}
  
.card {
    width: 300px;
    padding: 20px;
    background: var(--tg-theme-secondary-bg-color, white);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    border-radius: 10px;
    transition: background 0.3s;
}
  
.logo {
    width: 80px;
    height: 80px;
    background: var(--tg-theme-button-color, #3b82f6);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    margin: 0 auto;
    color: var(--tg-theme-button-text-color, white);
    font-weight: bold;
    font-size: 20px;
    transition: background 0.3s, color 0.3s;
}
  
.debt {
    font-size: 24px;
    font-weight: bold;
    color: var(--tg-theme-link-color, #dc2626);
    margin: 10px 0;
    transition: color 0.3s;
}
  
.pay-button, .find-button {
    background: var(--tg-theme-button-color, #10b981);
    color: var(--tg-theme-button-text-color, white);
    padding: 10px;
    border: none;
    width: 100%;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s, color 0.3s;
}
  
  .pay-button:hover {
    background: var(--tg-theme-button-hover-color, #059669);
  }

.input-field {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--tg-theme-link-color, #ccc);
  border-radius: 5px;
  margin-bottom: 10px;
}

.file-upload {
  width: 100%;
  margin-bottom: 10px;
}

a {
    color: var(--tg-theme-link-color, #2678b6);
}

.btn {
    font-size: 14px;
    padding: 10px 17px;
}

.btn-primary {
    background-color: var(--tg-theme-button-color, #50a8eb);
    color: var(--tg-theme-button-text-color, #fff);
    border: none;
}

button {
    display: block;
    width: 100%;
    font-size: 14px;
    margin: 15px 0;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    background-color: var(--tg-theme-button-color, #50a8eb);
    color: var(--tg-theme-button-text-color, #ffffff);
    cursor: pointer;
}

.main-container {
    padding: 15px;
}

.list-header {
    text-transform: uppercase;
    font-size: .92em;
    color: var(--tg-theme-hint-color, #ccc);
    margin: 0 0 10px;
}

a.list-group-item,
button.list-group-item {
    color: var(--tg-theme-text-color, #222);
}

.main-container p {
    margin: 0 0 10px;
}

.main-container pre,
.main-container > .btn {
    margin: 0 0 7px;
}

.main-container pre + .hint,
.main-container > .btn + .hint {
    text-align: center;
    margin: 0 0 15px;
}

button[disabled] {
    opacity: 0.6;
    cursor: auto;
    pointer-events: none;
}

button.close_btn {
    /*position: fixed;*/
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 0;
    margin: 0;
    padding: 16px 20px;
    text-transform: uppercase;
}

input[type="text"],
.input[contenteditable] {
    display: block;
    box-sizing: border-box;
    font-size: 14px;
    width: 100%;
    padding: 12px 20px;
    margin: 15px 0;
    border: 1px solid var(--tg-theme-link-color, #000);
    background-color: var(--tg-theme-bg-color, #ffffff);
    border-radius: 4px;
    color: var(--tg-theme-text-color, #222222);
    text-align: start;
}

input[type="text"]::-webkit-input-placeholder {
    color: var(--tg-theme-hint-color, #ccc);
}

input[type="text"]::-moz-placeholder {
    color: var(--tg-theme-hint-color, #ccc);
}

input[type="text"]:-ms-input-placeholder {
    color: var(--tg-theme-hint-color, #ccc);
}

.input[data-placeholder] {
    position: relative;
}

.input[data-placeholder]:empty:before {
    position: absolute;
    left: 0;
    right: 0;
    content: attr(data-placeholder);
    color: var(--tg-theme-hint-color, #ccc);
    padding: 0 20px;
    font-weight: normal;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    pointer-events: none;
    z-index: -1;
}

section {
    padding: 15px;
    text-align: center;
    background-color: var(--bg-color, #ffffff);
}

section#top_sect {
    background-color: var(--tg-theme-bg-color, #ffffff);
}

section#top_sect.second {
    background-color: var(--tg-theme-secondary-bg-color, #efefef);
}

section .sect_row {
    margin: 10px 0;
}

section + section {
    padding: 0 15px 65px;
}

p {
    margin: 40px 0 15px;
}

ul {
    text-align: left;
}

li {
    color: var(--tg-theme-hint-color, #a8a8a8);
}

textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 7px;
}

pre {
    background: rgba(0, 0, 0, .07);
    color: var(--tg-theme-text-color, #222);
    font-size: 12px;
    border: none;
    border-radius: 4px;
    padding: 8px;
    margin: 7px 0;
    word-break: break-word;
    white-space: pre-wrap;
    text-align: left;
}

.dark pre {
    background: rgba(255, 255, 255, .15);
}

.chat_img {
    width: 30px;
    border-radius: 15px;
    margin-right: 10px;
}

.columns {
    display: flex;
}

.columns > * {
    flex-grow: 1;
}

.hint {
    font-size: .8em;
    color: var(--tg-theme-hint-color, #a8a8a8);
}

.ok {
    color: green;
}

.err {
    color: red;
}

.status_need {
    display: none;
}

#fixed_wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    transform: translateY(100vh);
}

.viewport-container {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    height: var(--tg-viewport-stable-height, 100vh);
    transition: height .2s ease;
}

.viewport-container .main-container {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.viewport-container .main-container button {
    width: auto;
}

.viewport-border,
.viewport-stable_border {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    height: var(--tg-viewport-height, 100vh);
    pointer-events: none;
}

.viewport-stable_border {
    height: var(--tg-viewport-stable-height, 100vh);
}

.viewport-border:before,
.viewport-stable_border:before {
    content: attr(text);
    display: inline-block;
    position: absolute;
    background: gray;
    right: 0;
    top: 0;
    font-size: 7px;
    padding: 2px 4px;
    vertical-align: top;
}

.viewport-stable_border:before {
    background: green;
    left: 0;
    right: auto;
}

.viewport-border:after,
.viewport-stable_border:after {
    content: '';
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    border: 2px dashed gray;
}

.viewport-stable_border:after {
    border-color: green;
}

small {
    font-size: 12px;
}
.small {
    font-size: 12px;
}

.table {
    width: 100%;
    border-collapse: collapse;
}
.table td {
    padding: 2px;
}
.table-bordered {
    border: 1px solid var(--tg-theme-hint-color, #ccc);
}
.table-bordered th, .table-bordered td {
    border: 1px solid var(--tg-theme-hint-color, #ccc);
    padding: 4px;
}
.table.small button {
    padding: 3px 6px;
    font-size: 12px;
    margin: 4px 0;
}
.table.small input {
    padding: 3px 6px;
    font-size: 12px;
    margin: 4px 0;
}