:root,
:root.light {
  --color-body-bg: #fff;
  --color-surface: #fff;
  --color-header: #000;
  --color-h1: #000;
  --color-h2: #212529;
  --color-p: #212529;
  --color-input: #000;
  --color-input-bg: #fff;
  --color-box: #000;
  --color-box-bg: #fff;
  --color-url: #0d6efd;
  --color-icon: #0f9d58;
  --color-button-border: #cdcfd1;
  --color-border: #cdcfd1;
  --color-muted: #6c757d;
  --color-card-header-bg: #f9fafb;
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius: 12px;
  --radius-lg: 16px;
}

:root.dark {
  --color-body-bg: #212529;
  --color-surface: #292e33;
  --color-header: #adb5db;
  --color-h1: #fff;
  --color-h2: #adb5db;
  --color-p: #adb5db;
  --color-input: #fff;
  --color-input-bg: #212529;
  --color-box: #fff;
  --color-box-bg: #292e33;
  --color-url: #6ea8fe;
  --color-icon: #14c48f;
  --color-button-border: #464f59;
  --color-border: #464f59;
  --color-muted: #6c757d;
  --color-card-header-bg: #292e33;
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.4), 0 8px 10px -6px rgba(0,0,0,0.3);
  --radius: 12px;
  --radius-lg: 16px;
}

/* --- Base & Typography --- */

* {
  box-sizing: border-box;
}

body {
  background-color: var(--color-body-bg);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1 {
  color: var(--color-h1);
  letter-spacing: -0.02em;
}

h2 {
  color: var(--color-h2);
  font-size: 1.6rem;
}

p {
  color: var(--color-p);
  line-height: 1.7;
}

a {
  color: var(--color-url);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.8;
}

hr {
  border: none;
  border-top: 1px solid var(--color-p);
  opacity: 0.5;
}

/* --- Form Elements --- */

input {
  box-sizing: border-box;
  width: 100%;
  border-radius: 8px !important;
  font-size: 15px !important;
  padding: 10px 14px !important;
  color: var(--color-input) !important;
  background-color: var(--color-input-bg) !important;
  border: 1.5px solid rgb(86, 92, 110) !important;
  font-family: 'Inter', sans-serif !important;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus {
  outline: none;
  border-color: #0d6efd !important;
  box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15) !important;
}

input:not(:focus) {
  border: 1.5px solid rgb(86, 92, 110) !important;
}

textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid rgb(86, 92, 110);
  border-radius: 8px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-input);
  resize: none;
  background-color: var(--color-input-bg);
  font-family: 'Inter', sans-serif;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

textarea:focus {
  outline: none;
  border-color: #0d6efd;
  box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}

textarea:not(:focus) {
  border-color: rgb(86, 92, 110);
}

textarea::-webkit-scrollbar {
  width: 6px;
}

textarea::-webkit-scrollbar-thumb {
  background-color: var(--color-muted);
  border-radius: 3px;
}

/* --- Layout --- */

.header {
  position: fixed;
  top: 0;
  right: 0;
  padding: 12px 20px;
  z-index: 100;
  background-color: var(--color-body-bg);
  color: var(--color-header);
  border-bottom-left-radius: var(--radius);
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: 14px;
  font-weight: 500;
}

.header span[onclick] {
  padding: 6px 12px;
  border-radius: 8px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.header span[onclick]:hover {
  background-color: var(--color-box-bg);
  color: var(--color-h1);
}

.master-div {
  min-height: 100vh;
  padding-bottom: 40px;
}

/* --- Brand Icon --- */

.icon {
  padding: 0.85rem;
  color: #fff;
  background-color: rgb(252, 145, 45);
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* --- Cards & Boxes --- */

.box {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  padding: 24px;
  color: var(--color-box);
  background-color: var(--color-box-bg);
  box-shadow: var(--shadow-md);
  transition: box-shadow 0.3s ease;
}

.card {
  border: 1px solid var(--color-border) !important;
  border-radius: var(--radius) !important;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  background-color: var(--color-box-bg) !important;
}

.card .card-header {
  background-color: var(--color-card-header-bg) !important;
  border-bottom: 1px solid var(--color-border) !important;
  padding: 14px 18px !important;
  font-weight: 600;
  font-size: 14px !important;
  letter-spacing: 0.01em;
  color: var(--color-p) !important;
}

.card .card-header .card-header-action {
  font-size: 13px;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  color: var(--color-p) !important;
  cursor: pointer;
  transition: color 0.15s ease;
}

.card .card-header .card-header-action:hover {
  color: var(--color-url) !important;
}

.card .list-group-item {
  border-color: var(--color-border) !important;
  background-color: var(--color-box-bg) !important;
  color: var(--color-p) !important;
  padding: 12px 18px !important;
  font-size: 14px;
  transition: background-color 0.15s ease;
}

.card .list-group-item:hover {
  background-color: var(--color-card-header-bg) !important;
}

/* --- Buttons --- */

.btn {
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  border-radius: 10px;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.btn-primary {
  background-color: #0d6efd;
  border-color: #0d6efd;
}

.btn-primary:hover {
  background-color: #0b5ed7;
  border-color: #0a58ca;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
}

.btn-success {
  background-color: #198754;
  border-color: #198754;
}

.btn-success:hover {
  background-color: #157347;
  border-color: #146c43;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(25, 135, 84, 0.3);
}

.btn-secondary {
  background-color: var(--color-card-header-bg);
  border-color: var(--color-border);
  color: var(--color-p);
}

.btn-secondary:hover {
  background-color: var(--color-border);
  color: var(--color-h1);
}

.btn-danger:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
}

/* --- URL Copy Area --- */

.input-group .form-control {
  background-color: var(--color-input-bg) !important;
  color: var(--color-url) !important;
  border-color: rgb(86, 92, 110) !important;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.input-group-text {
  background-color: var(--color-box-bg) !important;
  border-color: rgb(86, 92, 110) !important;
  color: var(--color-p) !important;
  transition: background-color 0.2s ease;
}

.input-group-text:hover {
  background-color: var(--color-border) !important;
}

/* --- Drag & Drop on Transfer Div --- */

#transfer-div.drag-over {
  border-color: #3b82f6;
  background-color: rgba(59, 130, 246, 0.05);
  box-shadow: var(--shadow-md), 0 0 0 3px rgba(59, 130, 246, 0.12);
}

/* --- Tables --- */

.table {
  color: var(--color-p) !important;
  --bs-table-bg: transparent;
  --bs-table-hover-bg: rgba(0,0,0,0.02);
  font-size: 14px;
}

:root.dark .table {
  --bs-table-hover-bg: rgba(255,255,255,0.03);
}

.table thead th {
  padding: 10px 16px !important;
  font-size: 11px !important;
  font-weight: 600 !important;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted) !important;
  background-color: var(--color-card-header-bg) !important;
  border-bottom: 1px solid var(--color-border) !important;
  border-top: none !important;
}

.table td {
  padding: 12px 16px !important;
  vertical-align: middle;
}

.table th,
.table td {
  border-color: var(--color-border) !important;
}

.table tbody tr:last-child td {
  border-bottom: none !important;
}

/* --- Modals --- */

.modal-content {
  border-radius: var(--radius) !important;
  border: 1px solid var(--color-border) !important;
  background-color: var(--color-box-bg) !important;
  box-shadow: var(--shadow-lg) !important;
}

.modal-header {
  border-bottom: 1px solid var(--color-border) !important;
  padding: 18px 24px !important;
}

.modal-body {
  padding: 20px 24px !important;
}

.modal-footer {
  border-top: 1px solid var(--color-border) !important;
  padding: 16px 24px !important;
}

.modal-header h5 {
  font-size: 1.05rem;
  font-weight: 600;
}

/* --- Progress Bars --- */

.progress {
  border-radius: 8px;
  background-color: var(--color-card-header-bg);
}

.progress-bar {
  border-radius: 8px;
  transition: width 0.4s ease;
}

/* --- Alert --- */

.alert {
  border-radius: 10px;
}

/* --- Grid Helpers --- */

.col-1-3 {
  display: none;
}

.col-2-3 {
  flex: 0 0 auto;
  width: auto;
}

@media (min-width: 1024px) {
  .master-div {
    margin-left: auto;
    margin-right: auto;
    width: 960px;
    text-align: center !important;
  }
  #home {
    width: 520px;
    margin-left: auto;
    margin-right: auto;
  }
  .head {
    justify-content: center;
  }
  .col-1-3 {
    display: block;
  }
  .col-2-3 {
    flex: 1 0 0%;
    width: 100%;
  }
}

/* --- Footer --- */

#footer p {
  font-size: 13px;
  color: var(--color-muted);
}

/* --- Animations --- */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.box,
.card {
  animation: fadeInUp 0.4s ease-out;
}

/* --- Scrollbar --- */

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

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background-color: var(--color-muted);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-p);
}