body,
html {
  height: 100%;
  font-family: 'Geologica', sans-serif;
  font-weight: 300;
}
* {
  box-sizing: border-box;
}
body {
  font-size: 16px;
  line-height: 140%;
  color: black;
  position: relative;
  background: #eceef8;
}
img {
  max-width: 100%;
}
button,
input,
select,
textarea {
  outline: none;
  box-sizing: border-box;
}
input,
textarea,
select {
  font-family: 'Geologica', sans-serif;
}
input:focus,
textarea:focus,
select:focus {
  border: 1px solid #252D41;
}
input.error {
  box-shadow: inset 0 0 0px 2px red;
}
input.error ~ label {
  display: none !important;
}
input.error ~ .hint {
  display: block;
}
.input-field {
  position: relative;
}
input::-webkit-input-placeholder,
textarea::-webkit-input-placeholder {
  color: #8D8D91;
}
textarea {
  height: 120px;
  resize: none;
}
button {
  font-family: 'Geologica', sans-serif;
  border-radius: 8px;
  background: #ffab33;
  height: 50px;
  padding: 0 38px;
  border: 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: normal;
}
button:hover {
  background: #f29f28;
}
h1,
h2 {
  margin: 0;
  margin-bottom: 0px;
}
a {
  text-decoration: none;
  color: white;
  font-size: 15px;
}
a:hover {
  text-decoration: underline;
  color: white;
}
ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
p {
  margin: 0;
}
.wrapper {
  overflow: hidden;
}
.flex {
  display: flex;
  flex-wrap: wrap;
}
.flex.inline {
  display: inline-flex;
}
.flex.jcsb {
  justify-content: space-between;
}
.flex.jce {
  justify-content: flex-end;
}
.flex.ais {
  align-items: flex-start;
}
.flex.aic {
  align-items: center;
}
.flex.jcc {
  justify-content: center;
}
.flex.aib {
  align-items: flex-end;
}
.flex.nowrap {
  flex-wrap: nowrap;
}
.flex.grow {
  flex-grow: 2;
}
.container {
  max-width: 1170px;
  padding: 0 35px;
  margin: 0 auto;
}
.caption {
  font-size: 32px;
  line-height: 36px;
  font-weight: 500;
  text-align: center;
  margin-bottom: 25px;
}
h1 {
  font-size: 42px;
  line-height: 56px;
  margin-bottom: 12px;
  font-weight: 400;
}
header,
footer {
  background: #1a1f2f;
}
header {
  position: relative;
  padding: 24px 0 18px 0;
  border-bottom: 4px solid #ffab33;
}
header .logo {
  width: 200px;
}
header .language {
  position: relative;
  color: #D9D9D9;
}
header .language .current {
  border-radius: 8px;
  background: rgb(0 0 0 / 53%);
  padding: 8px 16px;
  cursor: pointer;
}
header .language .current span {
  width: 20px;
  height: 20px;
  background: url('../img/icon-lang.svg') center center no-repeat;
}
header .language .current p {
  margin-left: 6px;
}
header .language.active .dropdown {
  display: block;
}
header .language.active .current {
  border-radius: 8px 8px 0 0;
  background: rgb(0 0 0 / 66%);
}
header .language .dropdown {
  position: absolute;
  display: none;
  top: 100%;
  right: 0;
  border-radius: 8px 0 8px 8px;
  background: rgb(0 0 0 / 84%);
  padding: 10px 24px;
  z-index: 2;
}
header .language .dropdown li:first-of-type {
  display: none;
}
header .language .dropdown .item {
  color: #D9D9D9;
  line-height: 240%;
  white-space: nowrap;
  overflow: hidden;
}
.content .top-title {
  text-align: center;
  padding: 80px 0 0 0;
}
.sharethis-wrapper {
  margin-top: 24px;
  display: flex;
  justify-content: center;
}
.content .top-title p {
  font-size: 24px;
  line-height: 140%;
  color: black;
}
.content .top-title span {
  font-size: 40px;
  color: #e60023;
  font-weight: 600;
  display: block;
  margin-top: 5px;
}
.content .input-form {
  margin: 50px 0;
}
.content .input-form form {
  max-width: 970px;
  margin: 0 auto;
  position: relative;
}
.content .input-form form input {
  width: 100%;
  border: 4px solid #dcdcdc;
  background: white;
  height: 72px;
  padding: 18px 92px 18px 32px;
  border-radius: 36px;
  font-size: 18px;
  font-weight: 250;
  letter-spacing: -0.08px;
  color: black;
}
.content .input-form form button {
  position: absolute;
  top: 50%;
  right: 10px;
  margin-top: -30px;
  padding: 20px;
  background-size: 100%;
  right: 7px;
  border-radius: 36px;
  height: 60px;
  border: none;
  padding: 30px 40px;
  background: #ffab33 url(../img/icon-download.svg) center center no-repeat;
  background-size: 33px 33px;
}
.content .quality-control.global {
  display: flex;
  gap: 12px;
  margin-top: 30px;
  justify-content: center;
  align-items: center;
}
.content .quality-control.global label {
  font-weight: 600;
  color: #222;
}
.content .quality-control.global select {
  width: fit-content;
  border-bottom: 2px solid #dcdcdc !important;
  border-top: 2px solid #dcdcdc !important;
  padding: 10px;
  border: none;
  background: none;
  font-size: 15px;
}
.content .quality-control.global.hidden {
  display: none;
}
.content .quality-control.global select.locked {
  opacity: 0.6;
  cursor: not-allowed;
}
.content .bottom-info .about {
  max-width: 770px;
  margin: 80px auto;
  text-align: center;
}
.content .bottom-info .about p {
  font-weight: 300;
  margin-top: 10px;
}
.content .bottom-info .how-to-use {
  margin: 0 -35px 0 -35px;
}
.content .bottom-info .how-to-use .row {
  gap: 20px;
  color: black;
  font-weight: 300;
  margin-top: 30px;
}
.content .bottom-info .how-to-use .row .item {
  width: 25%;
  flex: 1;
  position: relative;
  background: #dadeef;
  padding: 30px 30px 30px 50px;
  border-radius: 12px;
}
.content .bottom-info .how-to-use .row .item .num {
  font-size: 24px;
  color: #ffab33;
  font-size: 28px;
  font-weight: 900;
  position: absolute;
  left: 20px;
  top: 32px;
}
.content .bottom-info .how-to-use .row .item span {
  font-size: 20px;
  line-height: 28px;
}
.content .bottom-info .how-to-use .row .item p {
  margin-top: 10px;
  font-weight: 400;
}
.content .music-info {
  max-width: 970px;
  margin: 60px auto 0 auto;
}
.content .music-info .left {
  width: 357px;
  margin-right: 24px;
  flex-shrink: 0;
}
.content .music-info .left .art {
  text-align: center;
}
.content .music-info .left .art img {
  display: inline-block;
  border-radius: 15px;
}
.content .music-info .left .music-data {
  margin-top: 20px;
}
.content .music-info .left .music-data .list {
  margin-top: 20px;
}
.content .music-info .left .music-data .row {
  justify-content: space-between;
}
.content .music-info .right {
  flex-grow: 1;
}
.content .music-info .right .music-data .list {
  margin-top: 15px;
}
.content .music-info .right .music-data p {
  width: 240px;
  margin-right: 10px;
}
.content .music-info .right .desc {
  margin-top: 10px;
}
.content .music-info .right .error-message {
  border-radius: 12px;
  background: #E37083;
  padding: 16px 20px 16px 84px;
  position: relative;
  margin-top: 16px;
}
.content .music-info .right .error-message:before {
  content: '';
  width: 48px;
  height: 48px;
  background: url('../img/icon-error.svg') center center no-repeat;
  position: absolute;
  left: 20px;
  top: 16px;
}
.content .music-info .right .error-message span {
  color: #E7E7E8;
  font-size: 24px;
  font-weight: 500;
  display: block;
  margin-bottom: 10px;
}
.content .music-info .right .progress {
  cursor: auto;
  position: relative;
  display: inline-block;
  margin: 15px 0;
}
.content .music-info .right .progress button {
  cursor: default;
}
.content .music-info .right .progress button:hover {
  background-color: #e60023;
}
.content .music-info .right .progress p {
  position: relative;
  z-index: 1;
  font-weight: 300;
}
.content .music-info .right .progress span {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background: rgba(0, 0, 0, 0.2);
}
.content .music-info .right button.download {
  width: 100%;
  margin-top: 16px;
}
.content .music-info .right .playlist {
  border-radius: 12px;
  background: #151617;
  padding: 12px;
}
.content .music-info .right .playlist .num {
  color: #E7E7E8;
  font-size: 20px;
  font-weight: 500;
}
.content .music-info .right .playlist .capt {
  margin-top: 10px;
  color: #D9D9D9;
  font-size: 12px;
  line-height: 140%;
  letter-spacing: 1.68px;
  text-transform: uppercase;
  padding-right: 40px;
  margin-bottom: 7px;
}
.content .music-info .right .playlist .icon-num {
  position: relative;
  padding-left: 35px;
}
.content .music-info .right .playlist .icon-num:before {
  content: '';
  width: 16px;
  height: 16px;
  position: absolute;
  border-radius: 4px;
  border: 2px solid #1CCB5B;
  background: #1CCB5B url('../img/icon-tracks.svg') center center no-repeat;
  left: 0px;
  top: 50%;
  margin-top: -10px;
}
.content .music-info .right .playlist .icon-check {
  position: relative;
  box-sizing: border-box;
}
.content .music-info .right .playlist .icon-check.checked:before {
  background: #1CCB5B url('../img/icon-check.svg') center center no-repeat;
}
.content .music-info .right .playlist .icon-check:before {
  content: '';
  width: 16px;
  height: 16px;
  position: absolute;
  border-radius: 4px;
  border: 2px solid #1CCB5B;
  left: 16px;
  top: 50%;
  margin-top: -10px;
}
.content .music-info .right .playlist ul li {
  border-radius: 12px;
  background: #0E0F10;
  margin-top: 4px;
  padding: 8px 16px;
  cursor: pointer;
}
.content .music-info .right .playlist ul li .info {
  flex-wrap: nowrap;
  padding-left: 42px;
}
.content .music-info .right .playlist ul li .info .text span {
  font-size: 18px;
}
.content .music-info .right .playlist ul li .info .text p {
  color: #8D8D91;
  font-size: 16px;
  font-weight: 300;
}
.content .music-info .right .playlist ul li .info .avatar {
  margin-top: 5px;
  flex-shrink: 0;
}
.content .music-info .right .playlist ul li .info .avatar img {
  width: 40px;
  height: 40px;
  border-radius: 100%;
}
.content .music-info .right .playlist .load {
  margin: 15px 0 20px 0;
}
.content .music-info .right .playlist .load a {
  border-bottom: 2px solid #1CCB5B;
}
.content .music-info .right .playlist .load a:hover {
  border-bottom-color: transparent;
  text-decoration: none;
}
.content .music-info .music-data .name {
  color: #E7E7E8;
  font-size: 26px;
  line-height: 110%;
  font-weight: 500;
}
.content .music-info .music-data .capt {
  color: #8D8D91;
  margin: 10px 0 0px 0;
}
.content .music-info .music-data .list .row {
  margin: 4px 0;
  flex-wrap: nowrap;
}
.content .music-info .music-data .list p {
  color: #D9D9D9;
  font-size: 14px;
}
.content .music-info .music-data .list span {
  color: #D9D9D9;
  font-size: 14px;
  text-align: right;
}
footer {
  color: white;
  margin-top: 60px;
  padding: 20px 0;
  text-align: center;
}
footer p {
  max-width: 970px;
  margin: 5px auto;
  font-weight: 300;
}
.md-overlay {
  width: 100%;
  cursor: pointer;
  background: rgba(0, 0, 0, 0.8);
  position: fixed;
  left: 0;
  top: 0;
  z-index: 100;
  height: 100%;
  visibility: hidden;
}
.md-show {
  visibility: visible !important;
}
.close {
  position: absolute;
  cursor: pointer;
  right: 20px;
  top: 20px;
  width: 44px;
  background: url('../img/icon-close.svg') center center no-repeat;
  height: 44px;
  background-size: 100%;
}
.close:hover {
  opacity: 0.8;
}
.md-show ~ .md-overlay {
  opacity: 1;
  visibility: visible;
}
.pop-up.md-show {
  -webkit-transform: translateY(0);
  -moz-transform: translateY(0);
  -ms-transform: translateY(0);
  transform: translateY(0);
  opacity: 1;
}
a.close:hover {
  opacity: 0.95;
  -webkit-transform: rotate(360deg);
  -ms-transform: rotate(360deg);
  transform: rotate(360deg);
}
.pop-up {
  position: fixed;
  overflow: hidden;
  z-index: 101;
  visibility: hidden;
  -webkit-transform: translateY(-30%);
  -moz-transform: translateY(-30%);
  -ms-transform: translateY(-30%);
  transform: translateY(-30%);
  opacity: 0;
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  transition: all 0.3s;
  left: 50%;
  top: 0%;
  margin-top: 20px;
  width: 560px;
  margin-left: -280px;
}
.pop-up .close {
  display: none;
}
.pop-up h1 {
  margin-bottom: 0;
  display: inline-block;
}
.pop-up p {
  margin-bottom: 20px;
  display: inline-block;
}
.pop-up .caption {
  font-size: 24px;
  margin-bottom: 20px;
}
.pop-up .reset {
  height: 20px;
}
.pop-up input {
  width: 100%;
  margin-bottom: 12px;
}
.pop-up button {
  width: 100%;
}
.pop-up span {
  display: block;
  margin: 16px 0;
}
.pop-up .bottom {
  background: #F8F9FA;
  padding: 20px 40px;
  margin: 20px -40px 0 -40px;
}
.pop-up form {
  margin-bottom: 12px;
}
.pop-up a {
  color: #28719F;
  text-decoration: underline;
}
.pop-up a:hover {
  text-decoration: none;
}
.pop-up button.ggl {
  background: #ea4335;
  border-radius: 6px;
  color: #fff;
  height: 46px;
}
.pop-up button.ggl p {
  background: url(../img/google.png) left center no-repeat;
  padding-left: 25px;
}
.pop-up button.ggl:hover {
  box-shadow: none;
}
.mobile {
  display: none;
}
@media (max-width: 940px) {
  .content .music-info {
    flex-wrap: wrap;
  }
  .content .music-info .left {
    width: 100%;
    margin: 0 0 20px 0;
  }
  .content .music-info .right {
    width: 100%;
  }
  .content .bottom-info .how-to-use {
    margin: 0 0px 0 0px;
    padding: 0 20px;
  }
  .content .bottom-info .how-to-use .row .item {
    width: 48%;
    flex: auto;
  }
  #presentation-info, .download-panel {
    width: 100%;
  }
  .download-panel {
    margin-top: 30px;
  }
}
@media (max-width: 640px) {
  .mobile {
    display: block;
  }
  body {
    font-size: 20px;
  }
  .container {
    max-width: 534px;
    min-width: 360px;
    padding: 0 10px;
  }
  header .language {
    position: static;
  }
  header .language .current {
    background: inherit;
    padding: 0;
    margin-top: -5px;
  }
  header .language .current p {
    display: none;
  }
  header .language .current span {
    width: 40px;
    height: 40px;
    background-size: 100%;
  }
  header .language .dropdown {
    width: 100%;
    border-radius: 0;
    z-index: 1;
    padding: 130px 24px 300px 24px;
    top: 0;
    background: #0E0F10;
    text-align: center;
  }
  header .language .dropdown li:first-of-type {
    display: block;
  }
  .content .quality-control.global {
      flex-direction: column;
      gap: 18px;
      margin-top: 50px;
  }
  .content .top-title h1 {
    line-height: 140%;
    font-weight: 600;
    color: #201e3d;
  }
  .content .top-title h1 span {
    margin-top: 20px;
    font-size: 60px;
  }
  .content .input-form form input {
    font-size: 22px;
  }
  .content .music-info {
    flex-wrap: wrap;
    margin-top: 40px;
    margin-bottom: 40px;
  }
  .content .music-info .music-data .name {
    font-size: 30px;
  }
  .content .music-info .music-data .capt {
    font-size: 24px;
  }
  .content .music-info .music-data .list {
    display: none;
  }
  .content .music-info .music-data .list .row {
    justify-content: space-between;
  }
  .content .music-info .music-data .list span {
    font-size: 18px;
  }
  .content .music-info .music-data .list p {
    font-size: 18px;
  }
  .content .music-info .left {
    width: 100%;
    margin: 0 0 20px 0;
  }
  .content .music-info .left .art {
    margin-bottom: 20px;
  }
  .content .music-info .left .art img {
    width: 100%;
  }
  .content .music-info .left .music-data {
    margin-top: 40px;
  }
  .content .music-info .right {
    width: 100%;
  }
  .content .music-info .right .error-message {
    padding: 26px 30px 26px 104px;
  }
  .content .music-info .right .error-message:before {
    width: 54px;
    height: 54px;
    background-size: 100%;
    left: 30px;
    top: 26px;
  }
  .content .music-info .right .error-message span {
    font-size: 32px;
  }
  .content .music-info .right .progress {
    width: 100%;
  }
  .content .music-info .right .progress button {
    width: 100%;
    height: 69px;
  }
  .content .music-info .right .progress button p {
    font-size: 24px;
  }
  .content .music-info .right button.download {
    height: 68px;
    font-size: 23px;
    font-weight: 300;
  }
  .content .music-info .right .playlist .icon-num {
    font-size: 30px;
  }
  .content .music-info .right .playlist .capt {
    font-size: 14px;
  }
  .content .music-info .right .playlist .icon-check:before,
  .content .music-info .right .playlist .icon-num:before {
    width: 20px;
    height: 20px;
    margin-top: -12px;
  }
  .content .music-info .right .playlist ul li .info .text span {
    font-size: 22px;
  }
  .content .music-info .right .playlist ul li .info .text p {
    font-size: 19px;
  }
  .content .bottom-info .about {
    text-align: left;
    margin-bottom: 50px;
    padding: 0 20px;
  }
  .content .bottom-info .about .caption {
    text-align: left;
  }
  .content .bottom-info .how-to-use .caption {
    text-align: left;
    line-height: 40px;
  }
  .content .bottom-info .how-to-use .row {
    margin-left: 10px;
  }
  .content .bottom-info .how-to-use .row .item {
    width: 100%;
    flex: auto;
  }
  .content .bottom-info .how-to-use .row .item span {
    font-size: 28px;
  }
  .content .bottom-info .how-to-use .row .item p {
    font-size: 20px;
  }
  footer p {
    font-size: 16px;
    line-height: 24px;
  }
  .download-panel {
    width: 100%;
  }
}
#format-switcher,
.format-switcher {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.file-meta {
  margin-top: 20px;
}
.format-option {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  color: #201e3d;
  cursor: pointer;
}
.format-option input[type="radio"] {
  margin: 0;
}
.file-status {
  margin-top: 6px;
  font-size: 14px;
  color: #5a5d73;
  min-height: 18px;
}
.download-panel {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.download-btn.loading {
  background: #afb4c8;
  color: #f7f8ff;
  cursor: not-allowed;
  position: relative;
  padding-left: 52px;
  transition: background 0.2s ease, color 0.2s ease;
}
.download-btn.loading::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 50%;
  width: 16px;
  height: 16px;
  margin-top: -8px;
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-top-color: #fff;
  border-radius: 50%;
  animation: download-spin 0.8s linear infinite;
}
@keyframes download-spin {
  to {
    transform: rotate(360deg);
  }
}
.download-btn.success {
  background: #1ccb5b;
  color: #ffffff;
}
#status-message {
  display: none;
  text-align: center;
  margin: 20px 0;
  padding: 15px;
  border-radius: 8px;
}
#status-message.error {
  background: #E37083;
  color: #fff;
}
#status-message.success {
  background: #1CCB5B;
  color: #fff;
}
#progress-container {
  display: none;
  max-width: 970px;
  margin: 20px auto;
}
#progress-container .progress-wrapper {
  background: #dcdcdc;
  border-radius: 30px;
  height: 40px;
  position: relative;
  overflow: hidden;
}
#progress-container #progress-bar {
  background: #ffab33;
  height: 100%;
  width: 0%;
  transition: width 0.3s;
}
#progress-container #progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-weight: 500;
}
.presentation-info-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: flex-start;
  margin: 60px 0;
}
#presentation-info {
  display: none;
  padding: 30px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}
#presentation-info h2 {
  margin: 0 0 20px;
  text-align: left;
}
#presentation-info .info-row {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-top: 1px solid #f0f0f0;
}
#presentation-info .info-row:first-of-type {
  border-top: none;
}
#presentation-info .info-row .label {
  font-weight: 600;
  color: #666;
}
#presentation-info .info-row .value {
  max-width: 70%;
  text-align: right;
  color: #222;
  word-break: break-word;
}
#slides-container {
  display: none;
  max-width: 1170px;
  margin: 40px auto;
}
#slides-container h2 {
  text-align: center;
  margin-bottom: 30px;
}
/* New Slides Viewer Styles */
.slides-viewer {
  display: flex;
  gap: 20px;
  height: 500px;
  margin-bottom: 30px;
}

.slides-sidebar {
  width: 240px;
  overflow-y: auto;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 15px;
  padding-right: 10px;
  scrollbar-width: thin;
}

.slides-sidebar::-webkit-scrollbar {
  width: 6px;
}

.slides-sidebar::-webkit-scrollbar-thumb {
  background-color: rgba(0,0,0,0.2);
  border-radius: 3px;
}

.slides-main {
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
}

.slides-main img {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
}

.slide-thumbnail {
  cursor: pointer;
  border: 5px solid transparent;
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.2s;
  position: relative;
  background: #fff;
  flex-shrink: 0;
}

.slide-thumbnail.active {
  border-color: #ffab33;
}

.slide-thumbnail img {
  display: block;
  width: 100%;
  height: auto;
}

.slide-thumbnail .slide-number {
  position: absolute;
  top: 5px;
  left: 5px;
  background: rgb(255 171 51);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
}

/* Mobile responsive for slides viewer */
@media (max-width: 940px) {
  .slides-viewer {
    flex-direction: column;
    height: auto;
  }
  
  .slides-sidebar {
    width: 100%;
    height: auto;
    flex-direction: row;
    overflow-x: auto;
    padding-right: 0;
    padding-bottom: 10px;
    order: 2;
  }
  
  .slides-main {
    height: 400px; /* Reasonable height for tablet/mobile */
    order: 1;
    margin-bottom: 20px;
  }
  
  .slide-thumbnail {
    width: 140px;
    flex-shrink: 0;
  }
}

@media (max-width: 640px) {
  .slides-main {
    height: 250px;
  }
  
  .slide-thumbnail {
    width: 100px;
  }
}

#slides-container .quality-control {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
#slides-container .quality-control label {
  font-weight: 600;
  color: #333;
}
#slides-container .quality-control select {
  min-width: 220px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid #ccc;
  font-size: 15px;
}
#slides-container .download-buttons {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 25px;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
}
#slides-container .download-item {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}
#slides-container .download-item .file-meta {
  font-size: 14px;
  color: #555;
}
#slides-container .download-item .file-meta span {
  font-weight: 600;
  color: #222;
  margin-left: 6px;
}
#slides-container .download-item button {
  margin: 0;
  min-width: 220px;
}
#slides-container .download-item button.loading,
#slides-container .download-item button:disabled {
  background: #c7cbd6;
  color: #f8f8f8;
  cursor: not-allowed;
  position: relative;
}
#slides-container .download-item button.success {
  background: #538665;
  color: #fff;
  cursor: default;
}
#slides-container .download-item button.loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 3px solid rgba(255, 255, 255, 0.5);
  border-top-color: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  right: 16px;
  top: 50%;
  margin-top: -9px;
  animation: spin 0.8s linear infinite;
}
#slides-container .download-loading {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 20px;
  color: #333;
  font-weight: 500;
}
#slides-container .download-loading.visible {
  display: flex;
}
#slides-container .download-loading .spinner {
  width: 28px;
  height: 28px;
  border: 3px solid #ddd;
  border-top-color: #e60023;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
#slides-container .slide-item {
  text-align: center;
}
#slides-container .slide-item .slide-link {
  display: block;
  margin-bottom: 10px;
}
#slides-container .slide-item .slide-link img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
#slides-container .slide-item .download-slide-link {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  color: #0066cc;
  text-decoration: none;
}
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
.error-404 {
  text-align: center;
  padding: 60px 20px;
}
.error-404 h1 {
  font-size: 120px;
  font-weight: 700;
  color: #e60023;
  margin: 0;
  line-height: 1;
}
.error-404 p {
  font-size: 24px;
  color: #333;
  margin: 20px 0 40px;
}
.error-404 .download-btn {
  display: inline-block;
  margin-top: 20px;
}

/* SEO Content Sections */

/* Benefits Section */
.benefits-section {
  margin: 80px auto;
  max-width: 1100px;
  padding: 0 20px;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-top: 40px;
}

.benefit-card {
  background: #ffffff4a;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transition: transform 0.3s, box-shadow 0.3s;
}

.benefit-card h3 {
  color: #201e3d;
  font-size: 22px;
  margin-bottom: 12px;
  font-weight: 600;
}

.benefit-card p {
  color: #555;
  line-height: 1.6;
  font-size: 15px;
}

/* Features Section */
.features-section {
  margin: 80px auto;
  max-width: 900px;
  padding: 0 20px;
}

.features-list {
  max-width: 800px;
  margin: 30px auto;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding: 20px 0;
  border-bottom: 1px solid #f0f0f0;
}

.feature-item:last-child {
  border-bottom: none;
}

.feature-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: #1CCB5B;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 18px;
  margin-top: 2px;
}

.feature-content h4 {
  margin: 0 0 8px 0;
  color: #201e3d;
  font-size: 18px;
  font-weight: 600;
}

.feature-content p {
  margin: 0;
  color: #555;
  line-height: 1.6;
  font-size: 15px;
}

/* Use Cases Section */
.use-cases-section {
  margin: 80px auto;
  max-width: 1100px;
  padding: 0 20px;
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.use-case-card {
  background: #ffffff4a;
  padding: 25px 20px;
  border-radius: 10px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.08);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.use-case-card h3 {
  color: #201e3d;
  font-size: 18px;
  margin-bottom: 10px;
  font-weight: 600;
}

.use-case-card p {
  color: #555;
  line-height: 1.6;
  font-size: 14px;
}

/* Formats Section */
.formats-section {
  margin: 80px auto;
  max-width: 1100px;
  padding: 0 20px;
}

.formats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
  margin-top: 40px;
}

.format-card {
  text-align: center;
  padding: 30px 20px;
  background: #dadeef;
  border-radius: 10px;
  border: 2px solid #f0f0f0;
  transition: border-color 0.3s, transform 0.3s;
}

.format-icon {
  font-size: 48px;
  margin-bottom: 15px;
}

.format-card h3 {
  color: #201e3d;
  font-size: 20px;
  margin-bottom: 12px;
  font-weight: 600;
}

.format-card p {
  color: #555;
  line-height: 1.6;
  font-size: 14px;
}

/* FAQ Section */
.faq-section {
  max-width: 900px;
  margin: 80px auto;
  padding: 0 20px;
}

.faq-list {
  margin-top: 30px;
}

.faq-item {
  background: #ffffff4a;
  margin-bottom: 15px;
  border-radius: 35px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: box-shadow 0.3s;
}

.faq-item:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.faq-question {
  padding: 20px 25px;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #201e3d;
  font-size: 16px;
  user-select: none;
}

.faq-toggle {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  transition: transform 0.3s;
  font-weight: 300;
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 25px 20px;
  display: none;
  color: #555;
  line-height: 1.7;
  font-size: 15px;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-answer p {
  margin: 0;
}
@media (min-width: 941px) {
  #presentation-info {
    max-width: 518px;
  }
}

/* Mobile Responsive for SEO Sections */
@media (max-width: 940px) {
  .benefits-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .use-cases-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }
  
  .formats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .benefits-section,
  .features-section,
  .use-cases-section,
  .formats-section,
  .faq-section {
    margin: 60px auto;
  }
}

@media (max-width: 640px) {
  .benefits-grid,
  .use-cases-grid,
  .formats-grid {
    grid-template-columns: 1fr;
  }
  
  .benefit-card,
  .use-case-card,
  .format-card {
    padding: 20px;
  }
  
  .benefit-card h3,
  .use-case-card h3,
  .format-card h3 {
    font-size: 18px;
  }
  
  .feature-item {
    padding: 15px 0;
  }
  
  .faq-question {
    padding: 15px 20px;
    font-size: 15px;
  }
  
  .faq-answer {
    padding: 0 20px 15px;
    font-size: 14px;
  }
  
  .benefits-section,
  .features-section,
  .use-cases-section,
  .formats-section,
  .faq-section {
    margin: 40px auto;
  }
}