:root {
  --bg-color: #f8fafc;
  --text-color: #334155;
  --text-heading: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --navbar-bg: #ffffff;
  --navbar-border: #e2e8f0;
  --nav-link-color: #475569;
  --nav-link-hover: #0f172a;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --tab-border: #cbd5e1;
  --tab-bg-hover: #f1f5f9;
  --tab-text-color: #64748b;
  --input-bg: #ffffff;
  --input-border: #cbd5e1;
  --input-text: #0f172a;
  --input-placeholder: #94a3b8;
  --table-bg: #ffffff;
  --table-border: #cbd5e1;
  --table-th-bg: #f8fafc;
  --table-th-color: #475569;
  --table-tr-hover: #f1f5f9;
  --table-td-color: #334155;
  --modal-overlay-bg: rgba(15, 23, 42, 0.4);
  --modal-bg: #ffffff;
  --modal-border: #cbd5e1;
  --modal-title-color: #0f172a;
  --modal-close-color: #64748b;
  --modal-close-hover: #0f172a;
  --modal-body-color: #334155;
  --progress-bar-container-bg: #e2e8f0;
  --ready-card-bg: #eff6ff;
  --ready-card-border: #bfdbfe;
  --ready-title-color: #1e3a8a;
  --ready-filename-color: #475569;
  --btn-inactive-bg: #f1f5f9;
  --btn-inactive-border: #cbd5e1;
  --btn-inactive-text: #475569;
}
/* ============================
   RESET & BASE
   ============================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  font-size: 15px;
}
body {
  font-family: 'Inter', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 0 20px 6px;
}
a {
  text-decoration: none;
  color: inherit;
}
ul,
ol {
  list-style: none;
}
/* Global Font Sizes */
h1 {
  font-size: 24px;
}
h2 {
  font-size: 20px;
}
h3 {
  font-size: 18px;
}
p {
  font-size: 14px;
}
/* ============================
   NAVBAR
   ============================ */
.navbar {
  background-color: #f8fafc;
  border-bottom: 1px solid var(--navbar-border);
  /* padding: 0 420px; */
  height: 80px;
  display: flex;
  align-items: center;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 750px;
  margin: 0 auto;
  padding: 0;
}
/* Logo */
.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  user-select: none;
  height: 100%;
}
.logo-img {
  height: 44px;
  width: 90px;
  display: block;
}
/* Nav links */
.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}
.nav-link {
  font-size: 1rem;
  color: var(--nav-link-color);
  font-weight: 400;
  transition: color 0.2s;
  text-decoration: none;
}
.nav-link:hover {
  color: var(--nav-link-hover);
}
.nav-link.active {
  color: #2563EB;
}
/* Menu Toggle for Mobile */
.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--nav-link-color);
  cursor: pointer;
  padding: 8px;
  transition: color 0.2s;
}
.menu-toggle:hover {
  color: var(--nav-link-hover);
}
/* Dropdown Menu */
.dropdown {
  position: relative;
  display: flex;
  align-items: center;
}
.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: none;
  font-size: 1rem;
  color: var(--nav-link-color);
  font-weight: 400;
  cursor: pointer;
  padding: 0;
  font-family: inherit;
  transition: color 0.2s;
}
.dropdown-toggle:hover {
  color: var(--nav-link-hover);
}
.lang-icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
}
.dropdown-arrow {
  font-size: 0.7rem;
  transition: transform 0.2s;
}
.dropdown:hover .dropdown-arrow,
.dropdown.open .dropdown-arrow {
  transform: rotate(180deg);
}
.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 0;
  min-width: 130px;
  list-style: none;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  display: block;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 100;
}
.dropdown:hover .dropdown-menu,
.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(8px);
}
.dropdown-item {
  display: block;
  padding: 8px 16px;
  color: var(--text-color);
  font-size: 0.95rem;
  text-decoration: none;
  transition: background-color 0.2s, color 0.2s;
  text-align: left;
}
.dropdown-item:hover {
  background-color: var(--tab-bg-hover);
  color: var(--text-heading);
}
/* ============================
   MAIN
   ============================ */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}
/* ============================
   CONVERTER SECTION
   ============================ */
.converter-section {
  width: 100%;
  max-width: 750px;
  margin-top: 40px;
}
.converter-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  overflow: hidden;
  padding: 22px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}
/* Tabs */
.tabs {
  display: flex;
  border: 1px solid var(--tab-border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 18px;
}
.tab {
  flex: 1;
  padding: 14px 0;
  background: transparent;
  border: none;
  cursor: pointer;
  color: black;
  font-family: inherit;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background 0.2s, color 0.2s;
}
.tab strong {
  font-weight: 700;
  color: inherit;
}
.tab-sub {
  font-weight: 400;
  font-size: 0.9rem;
  color: inherit;
}
.tab.active {
  background-color: #1D4ED8;
  color: #ffffff;
  border: 1.5px solid #3b82f6;
  border-radius: 4px;
}
.tab:not(.active):hover {
  background-color: var(--tab-bg-hover);
  color: var(--text-heading);
}
/* Input Row */
.input-row {
  display: flex;
  gap: 12px;
  align-items: center;
}
.yt-input {
  flex: 1;
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  padding: 14px 16px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--input-text);
  outline: none;
  transition: border-color 0.2s;
}
.yt-input::placeholder {
  color: var(--input-placeholder);
}
.yt-input:focus {
  border-color: #3b82f6;
  color: var(--input-text);
}
.convert-btn {
  background-color: #2563eb;
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 14px 28px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s;
}
.convert-btn:hover {
  background-color: #1d4ed8;
}
/* ============================
   INFO SECTION
   ============================ */
.info-section {
  width: 100%;
  max-width: 750px;
  margin-top: 44px;
}
.info-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 18px;
}
.info-text {
  font-size: 14px;
  color: var(--text-color);
  line-height: 1.8;
  margin-bottom: 22px;
  text-align: justify;
}
.info-subheading {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-heading);
  margin-top: 24px;
  margin-bottom: 10px;
}
.inline-link {
  color: #6b9fe4;
  text-decoration: none;
  transition: color 0.2s;
}
.inline-link:hover {
  color: #93c5fd;
  text-decoration: underline;
}
.info-heading {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 18px;
}
.steps-list {
  list-style: decimal;
  padding-left: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 22px;
}
.steps-list li {
  font-size: 14px;
  color: var(--text-color);
  line-height: 1.7;
  padding-left: 6px;
}
.enjoy-text {
  margin-bottom: 0;
}
/* ============================
   FOOTER
   ============================ */
.footer {
  background-color: #f8fafc;
  border-top: 1px solid var(--navbar-border);
  padding: 28px 24px;
  text-align: center;
}
.copyright-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  list-style: none;
}
.footer-link {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-link:hover {
  color: var(--text-heading);
}
/* ============================
   CONTACT FORM
   ============================ */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 24px;
  margin-top: 20px;
  margin-bottom: 30px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-label {
  font-size: 0.95rem;
  color: var(--text-heading);
  font-weight: 500;
}
.form-input,
.form-select,
.form-textarea {
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  padding: 12px 16px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--input-text);
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: #3b82f6;
}
.form-textarea {
  resize: vertical;
  min-height: 120px;
}
.submit-btn {
  background-color: #2563eb;
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 14px 28px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
  align-self: flex-start;
  margin-top: 8px;
}
.submit-btn:hover {
  background-color: #1d4ed8;
}
/* ============================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ============================ */
/* Tablets and small screens (max-width: 768px) */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  .navbar {
    padding: 0 20px;
    height: 64px;
  }
  .nav-links {
    gap: 16px;
  }
  .logo-img {
    height: 38px;
  }
  main {
    padding: 0 16px 40px;
  }
  .converter-section {
    margin-top: 24px;
  }
  .info-section {
    margin-top: 32px;
  }
}
/* Mobile Devices (max-width: 576px) */
@media (max-width: 576px) {
  .navbar {
    padding: 0 16px;
    height: 80px;
  }
  .nav-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    position: relative;
    padding: 0;
  }
  .menu-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    gap: 16px;
    z-index: 999;
    margin-top: 4px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  }
  .nav-links.show {
    display: flex;
  }
  .nav-link {
    font-size: 0.95rem;
    padding: 4px 0;
  }
  .dropdown {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }
  .dropdown-toggle {
    width: 100%;
    justify-content: flex-start;
    gap: 8px;
    padding: 4px 0;
  }
  .dropdown-toggle .dropdown-arrow {
    margin-left: auto;
  }
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    display: none;
    transform: none;
    box-shadow: none;
    border: none;
    background-color: var(--tab-bg-hover);
    margin-top: 8px;
    width: 100%;
  }
  .dropdown.open .dropdown-menu {
    display: block;
  }
  .converter-card {
    padding: 16px;
  }
  .input-row {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .yt-input {
    width: 100%;
  }
  .convert-btn {
    width: 100%;
    text-align: center;
  }
  .info-text {
    text-align: left;
    font-size: 14px;
  }
  .steps-list {
    padding-left: 16px;
  }
  .steps-list li {
    font-size: 14px;
  }
  .footer-links {
    gap: 16px;
  }
  .footer-link {
    font-size: 0.85rem;
  }
  .contact-form {
    padding: 16px;
  }
  .submit-btn {
    width: 100%;
    align-self: stretch;
  }
}
/* ============================
   DYNAMIC DOWNLOAD TABLE
   ============================ */
.download-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
  background-color: var(--table-bg);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--table-border);
}
.download-table th, .download-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--table-border);
}
.download-table th {
  background-color: var(--table-th-bg);
  color: var(--table-th-color);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.download-table td {
  color: var(--table-td-color);
  font-size: 0.95rem;
  vertical-align: middle;
}
.download-table tbody tr:last-child td {
  border-bottom: none;
}
.download-table tbody tr:hover {
  background-color: var(--table-tr-hover);
}
.table-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: #5CB85C;
  color: #ffffff;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background-color 0.2s, transform 0.1s;
  border: none;
  cursor: pointer;
}
.table-download-btn:hover {
  background-color: #5CB85C;
  transform: translateY(-1px);
}
.table-download-btn:active {
  transform: translateY(0);
}
.table-download-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}
/* ============================
   DOWNLOAD MODAL
   ============================ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--modal-overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}
.modal-container {
  background-color: var(--modal-bg);
  border: 1px solid var(--modal-border);
  border-radius: 12px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
  overflow: hidden;
  transform: translateY(-20px);
  transition: transform 0.3s ease;
}
.modal-overlay.active .modal-container {
  transform: translateY(0);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--modal-border);
}
.modal-title {
  color: var(--modal-title-color);
  font-size: 1.1rem;
  font-weight: 600;
}
.modal-close {
  background: transparent;
  border: none;
  color: var(--modal-close-color);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
  transition: color 0.2s;
}
.modal-close:hover {
  color: var(--modal-close-hover);
}
.modal-body {
  padding: 24px 20px;
  color: var(--modal-body-color);
}
/* Progress Section */
.progress-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}
.progress-info {
  font-size: 1rem;
  color: var(--modal-title-color);
}
.progress-status {
  font-size: 0.95rem;
  color: var(--text-muted);
}
.progress-percent {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.progress-bar-container {
  width: 100%;
  height: 8px;
  background-color: var(--progress-bar-container-bg);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 4px;
}
.progress-bar-fill {
  height: 100%;
  width: 0%;
  background-color: #5CB85C;
  border-radius: 4px;
  transition: width 0.1s linear;
}
/* Ready Card Section */
.ready-section {
  display: none;
  flex-direction: column;
  align-items: center;
}
.ready-card {
  width: 100%;
  border: 1px solid var(--ready-card-border);
  background-color: var(--ready-card-bg);
  border-radius: 8px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}
.ready-icon-container {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #5CB85C;
}
.ready-icon-container svg {
  width: 48px;
  height: 48px;
  stroke: currentColor;
  fill: none;
  overflow: visible;
}
.ready-title {
  color: var(--ready-title-color);
  font-size: 1.25rem;
  font-weight: 600;
}
.ready-filename {
  color: var(--ready-filename-color);
  font-size: 0.95rem;
  line-height: 1.4;
  word-break: break-word;
}
.ready-download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: #5CB85C;
  color: #ffffff;
  font-weight: 600;
  font-size: 1rem;
  padding: 10px 24px;
  border-radius: 8px;
  text-decoration: none;
  transition: background-color 0.2s;
  width: 100%;
  max-width: 200px;
  border: none;
  cursor: pointer;
  margin-top: 8px;
}
.ready-download-btn:hover {
  background-color: #5CB85C;
}