*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ===== تم‌ها ===== */
body.light {
  --surface: #ffffff;
  --border: #e0e0e0;
  --text: #1a1a1a;
  --text-muted: #666;
  --text-faint: #aaa;
  --accent: #6c63ff;
  --accent-hover: #574fd6;
  --drop-bg-hover: #eeecff;
  --select-bg: #f9f9f9;
  --item-bg: #f9f9f9;
  --btn-select-bg: #efefef;
  --btn-select-border: #ccc;
  --btn-select-hover: #e0e0e0;
  --download-bg: #e6f4ee;
  --download-border: #b2d8c4;
  --download-color: #1a7a4a;
  --download-hover: #d0ecdf;
  --zip-bg: #e8f0fb;
  --zip-border: #b3cdf5;
  --zip-color: #1a5abf;
  --zip-hover: #d0e2f8;
  --icon-btn-bg: #efefef;
  --icon-btn-border: #ccc;
  --icon-btn-color: #333;
  --header-bg: #ffffff;
  --header-border: #e0e0e0;
}

body.dark {
  --surface: #1a1a1a;
  --border: #2a2a2a;
  --text: #e0e0e0;
  --text-muted: #888;
  --text-faint: #555;
  --accent: #6c63ff;
  --accent-hover: #574fd6;
  --drop-bg-hover: #1e1b33;
  --select-bg: #252525;
  --item-bg: #252525;
  --btn-select-bg: #252525;
  --btn-select-border: #444;
  --btn-select-hover: #333;
  --download-bg: #1e3a2f;
  --download-border: #2a5c45;
  --download-color: #4caf87;
  --download-hover: #254d3d;
  --zip-bg: #1a2a3a;
  --zip-border: #2a4a6a;
  --zip-color: #5aabff;
  --zip-hover: #1e3550;
  --icon-btn-bg: #252525;
  --icon-btn-border: #444;
  --icon-btn-color: #e0e0e0;
  --header-bg: #1a1a1a;
  --header-border: #2a2a2a;
}

@font-face {
  font-family: 'Dibaj';
  src: url('assest/fonts/Dibaj-Medium.woff2') format('woff2'),
       url('assest/fonts/Dibaj-Medium.woff') format('woff');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

body {
  font-family: 'Dibaj';
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0;
  transition: background 0.3s, color 0.3s;
}

/* ===== هدر جدید ===== */
.site-header {
  width: 100%;
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  padding: 16px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background 0.3s, border-color 0.3s;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  align-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

.header-text {
  font-size: 15px;
  color: var(--text-muted);
  margin: 0;
  margin-right: 20px;
  margin-left: 20px;
  min-width: 200px;
}

.header-actions {
  display: flex;
  align-items: center;
  align-content: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  flex-direction: row-reverse;
}

.btn-header-link-desktop {
  background: rgb(0, 184, 148);
  color: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s;
  white-space: nowrap;
}

.btn-header-link-desktop:hover {
  background: rgb(0 153 123);
}

.btn-header-link-mobile {
  background: rgb(0, 184, 148);
  color: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s;
  white-space: nowrap;
  display: none;
}

.btn-header-link-mobile:hover {
  background: rgb(0 153 123);
}

.btn-icon {
  font-family: "Dibaj";
  background: var(--icon-btn-bg);
  border: 1px solid var(--icon-btn-border);
  color: var(--icon-btn-color);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s;
  min-width: 44px;
}

.btn-icon:hover { opacity: 0.8; }

/* ===== کانتینر ===== */
.container {
  width: 100%;
  max-width: 720px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px 10px;
}

.section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  transition: background 0.3s, border-color 0.3s;
}

/* ===== فرمت ===== */
.format-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.format-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 250px;
}

.format-group label {
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.format-group select {
  font-weight: 600;
  text-align: center;
  font-family: 'Dibaj';
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--select-bg);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.format-group select:hover { border-color: var(--accent); }
.format-group select:disabled { opacity: 0.5; text-align: center; font-family: "Dibaj"; cursor: not-allowed; }

.arrow {
  font-size: 24px;
  color: var(--text-muted);
  margin-top: 20px;
}

/* ===== آپلود ===== */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
  background: var(--surface);
}

.drop-zone.dragover {
  border-color: var(--accent);
  background: var(--drop-bg-hover);
}

.drop-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.drop-zone p {
  font-size: 16px;
  color: var(--text);
  margin-bottom: 8px;
}

.drop-zone span {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.btn-select {
 font-family: "Dibaj";
  background: var(--btn-select-bg);
  border: 1px solid var(--btn-select-border);
  color: var(--text);
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s;
}

.btn-select:hover {
  background: var(--btn-select-hover);
}

.selected-files {
  margin-top: 12px;
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
}

.quality-discription {
  text-align: center;
  font-size: 11px;
}

.quality-row {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quality-row label {
  font-size: 14px;
  color: var(--text);
  display: flex;
  justify-content: space-evenly;
}

.quality-row input[type="range"] {
  width: 100%;
  cursor: pointer;
}

.btn-convert {
  font-family: 'Dibaj';
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 14px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  margin-top: 20px;
  transition: background 0.2s;
}

.btn-convert:hover {
  background: var(--accent-hover);
}

.btn-convert:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ===== خروجی ===== */
.output-section h3 {
  font-size: 18px;
  margin-bottom: 16px;
  color: var(--text);
}

.output-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.output-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--item-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: background 0.2s;
}

.output-item img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.output-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.output-info .name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  word-break: break-word;
}

.output-info .size {
  font-size: 12px;
  color: var(--text-muted);
}

.btn-download {
  background: var(--download-bg);
  border: 1px solid var(--download-border);
  color: var(--download-color);
  padding: 8px 16px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  transition: background 0.2s;
  white-space: nowrap;
}

.btn-download:hover {
  background: var(--download-hover);
}

.btn-zip {
  width: 100%;
  background: var(--zip-bg);
  border: 1px solid var(--zip-border);
  color: var(--zip-color);
  padding: 12px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-zip:hover {
  background: var(--zip-hover);
}

.btn-zip:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ===== فوتر ===== */
.site-footer {
  font-weight: 700;
  text-align: center;
  padding-top: 20px;
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.site-footer a:hover {
  text-decoration: underline;
}

.version {
  font-size: 13px;
  font-weight: 400;
  margin-top: 5px;
}

/* ===== ریسپانسیو ===== */
@media (max-width: 600px) {
  .header-text {
    font-size: 13px;
  margin-right: 0px;
  margin-left: 0px;
  }
  .header-content {
    flex-direction: column;
    align-items: center;
  }

  .header-actions {
    width: 100%;
    justify-content: space-evenly;
    flex-direction: row-reverse;
  }
  
  .btn-header-link-desktop {
    display: none;
  }
  
  .btn-header-link-mobile {
    display: unset;
  }

  .format-row {
    flex-direction: column;
  }

  .arrow {
    transform: rotate(270deg);
    margin: 0;
  }

  .site-footer {
    font-size: 13px;
  }

  .version {
    font-size: 13px;
    font-weight: 400;
    margin-top: 5px;
  }

  .output-item {
    flex-direction: column;
    text-align: center;
  }

  .output-item img {
    width: 100%;
    height: auto;
    max-height: 200px;
  }
  
}