/* ============================================================
   Thumbnail-Download.com — Main Stylesheet
   Modern Design, Darkmode-capable, Responsive
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=DM+Mono:wght@400;500&display=swap');

/* ---- CSS Variables: Light Theme ---- */
:root {
  --font-main: 'DM Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'DM Mono', monospace;

  --color-bg:           #F5F7FA;
  --color-bg-alt:       #ECEEF2;
  --color-surface:      #FFFFFF;
  --color-surface-2:    #F0F2F6;
  --color-border:       #DDE1EB;
  --color-text:         #111827;
  --color-text-muted:   #6B7280;
  --color-text-light:   #9CA3AF;

  --color-accent:       #0F7DFF;
  --color-accent-dark:  #0050C8;
  --color-accent-glow:  rgba(15,125,255,0.18);
  --color-accent-hover: #0060DD;

  --color-yt:           #FF0000;
  --color-fb:           #1877F2;
  --color-vimeo:        #1AB7EA;
  --color-dm:           #00B8F5;

  --color-success:      #10B981;
  --color-header-bg:    #0A1628;

  --shadow-card:        0 2px 16px rgba(0,0,0,0.08);
  --shadow-input:       0 1px 4px rgba(0,0,0,0.06);
  --shadow-btn:         0 2px 12px rgba(15,125,255,0.35);

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  --header-h:   72px;
  --max-w:      1100px;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Dark Theme ---- */
[data-theme="dark"] {
  --color-bg:           #0D1117;
  --color-bg-alt:       #161B22;
  --color-surface:      #1C2333;
  --color-surface-2:    #242D3E;
  --color-border:       #2D3748;
  --color-text:         #E2E8F0;
  --color-text-muted:   #8B9AB4;
  --color-text-light:   #4A5568;

  --color-accent:       #4D9FFF;
  --color-accent-dark:  #2B7DFF;
  --color-accent-glow:  rgba(77,159,255,0.2);
  --color-accent-hover: #6AAFFF;

  --color-header-bg:    #060C18;
  --shadow-card:        0 2px 20px rgba(0,0,0,0.4);
  --shadow-btn:         0 2px 16px rgba(77,159,255,0.4);
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }

img { max-width: 100%; height: auto; display: block; }

/* ============================================================
   HEADER / NAVIGATION
   ============================================================ */
.site-header {
  background: var(--color-header-bg);
  height: var(--header-h);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  gap: 16px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.site-logo svg { width: 36px; height: 36px; }
.site-logo .logo-text {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
  white-space: nowrap;
}
.site-logo .logo-text span { color: var(--color-accent); }

.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.header-nav a {
  color: rgba(255,255,255,0.72);
  font-size: 14px;
  font-weight: 500;
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.header-nav a:hover,
.header-nav a.active {
  background: rgba(255,255,255,0.1);
  color: #fff;
}
.header-nav a.active {
  color: var(--color-accent);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
/* Switcher Wrappers */
.desktop-switchers {
  display: flex;
  align-items: center;
  gap: 8px;
}
.mobile-switchers {
  display: none;
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
}
.lang-switcher a {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  color: rgba(255,255,255,0.65);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: background var(--transition), color var(--transition);
}
.lang-switcher a:hover,
.lang-switcher a.lang-active {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
.lang-switcher a svg { width: 16px; height: 16px; }
.lang-sep { width: 1px; background: rgba(255,255,255,0.12); height: 20px; }

/* Theme switcher */
.theme-switcher {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.theme-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 7px 9px;
  color: rgba(255,255,255,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
  line-height: 1;
}
.theme-btn:hover,
.theme-btn.active {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
.theme-btn svg { width: 16px; height: 16px; }
.theme-sep { width: 1px; background: rgba(255,255,255,0.12); height: 20px; }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: rgba(255,255,255,0.8);
  cursor: pointer;
  padding: 6px;
}
.nav-toggle svg { width: 22px; height: 22px; }

/* ============================================================
   HERO / DOWNLOADER SECTION
   ============================================================ */
.hero {
  background: var(--color-header-bg);
  padding: 64px 24px 72px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(15,125,255,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  max-width: 780px;
  margin: 0 auto;
  position: relative;
  text-align: center;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(15,125,255,0.12);
  border: 1px solid rgba(15,125,255,0.25);
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  color: #fff;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 14px;
}
.hero-title span { color: var(--color-accent); }
.hero-subtitle {
  font-size: 17px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 40px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 400;
}

/* Platform tabs */
.platform-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.platform-tab {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: 100px;
  border: 1.5px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.65);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
}
.platform-tab:hover {
  border-color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.12);
  color: #fff;
}
.platform-tab.tab-active {
  border-color: var(--color-accent);
  background: rgba(15,125,255,0.18);
  color: #fff;
}
.platform-tab.tab-yt.tab-active    { border-color: var(--color-yt); background: rgba(255,0,0,0.15); }
.platform-tab.tab-fb.tab-active    { border-color: var(--color-fb); background: rgba(24,119,242,0.15); }
.platform-tab.tab-vimeo.tab-active { border-color: var(--color-vimeo); background: rgba(26,183,234,0.15); }
.platform-tab.tab-dm.tab-active    { border-color: var(--color-dm); background: rgba(0,184,245,0.15); }
.platform-tab svg { width: 18px; height: 18px; }

/* Downloader form */
.downloader-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 28px 28px 24px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
  text-align: left;
}
[data-theme="dark"] .downloader-box {
  background: var(--color-surface);
  border-color: var(--color-border);
}

.form-row {
  display: flex;
  gap: 8px;
}
.url-input {
  flex: 1;
  padding: 14px 18px;
  font-family: var(--font-main);
  font-size: 15px;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
  min-width: 0;
}
.url-input::placeholder { color: var(--color-text-light); }
.url-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}
.url-submit {
  padding: 14px 28px;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-main);
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: var(--shadow-btn);
  transition: background var(--transition), transform 0.12s, box-shadow var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.url-submit:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}
.url-submit:active { transform: translateY(0); }
.url-submit svg { width: 18px; height: 18px; }

.form-hints {
  margin-top: 14px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.form-hint {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--color-text-muted);
}
.form-hint svg { width: 15px; height: 15px; color: var(--color-success); flex-shrink: 0; }
.hint-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
}

/* ============================================================
   BANNER / AD ZONE
   ============================================================ */
.banner-zone {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 20px 24px;
}
.banner-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 90px;
}

/* ============================================================
   RESULTS SECTION
   ============================================================ */
.results-section {
  background: var(--color-bg-alt);
  padding: 48px 24px;
}
.results-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.results-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 28px;
  text-align: center;
}
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}
.result-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}
.result-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.13);
}
.result-card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
  background: var(--color-bg-alt);
}
.result-card-body {
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.result-card-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.result-card-size {
  font-size: 12px;
  color: var(--color-text-light);
  font-family: var(--font-mono);
}
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition), transform 0.12s;
  border: none;
  cursor: pointer;
}
.download-btn:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
}
.download-btn svg { width: 15px; height: 15px; }
.download-btn-lg {
  padding: 13px 28px;
  font-size: 15px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 0;
  transition: color var(--transition);
}
.back-link:hover { color: var(--color-accent); }
.back-link svg { width: 16px; height: 16px; }

/* Loading state */
.loading-state {
  text-align: center;
  padding: 48px;
}
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   FEATURES / INFO SECTION
   ============================================================ */
.features-section {
  padding: 72px 24px;
  background: var(--color-bg);
}
.features-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: 52px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.15;
  color: var(--color-text);
}
.section-subtitle {
  font-size: 17px;
  color: var(--color-text-muted);
  margin-top: 10px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition);
}
.feature-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}
.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.feature-icon svg { width: 24px; height: 24px; color: var(--color-accent); }
.feature-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}
.feature-text {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ============================================================
   ARTICLE CONTENT AREA (SEO text / editorial)
   ============================================================ */
.article-section {
  padding: 60px 24px;
  background: var(--color-bg-alt);
}
.article-inner {
  max-width: 800px;
  margin: 0 auto;
}
.article-section h2 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  color: var(--color-text);
}
.article-section p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 14px;
}
.article-author {
  font-style: italic;
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: 24px;
}
.vgwort-pixel { display: block; width: 1px; height: 1px; border: 0; }

/* ============================================================
   PLATFORMS OVERVIEW (index page)
   ============================================================ */
.platforms-section {
  padding: 72px 24px;
  background: var(--color-bg);
}
.platforms-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 52px;
}
.platform-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  text-decoration: none;
  color: var(--color-text);
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  display: block;
}
.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.12);
  color: var(--color-text);
}
.platform-card .p-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
}
.platform-card .p-icon svg { width: 30px; height: 30px; }
.platform-card.p-yt    .p-icon { background: rgba(255,0,0,0.1); }
.platform-card.p-yt    .p-icon svg { color: var(--color-yt); }
.platform-card.p-yt:hover    { border-color: var(--color-yt); }
.platform-card.p-fb    .p-icon { background: rgba(24,119,242,0.1); }
.platform-card.p-fb    .p-icon svg { color: var(--color-fb); }
.platform-card.p-fb:hover    { border-color: var(--color-fb); }
.platform-card.p-vimeo .p-icon { background: rgba(26,183,234,0.1); }
.platform-card.p-vimeo .p-icon svg { color: var(--color-vimeo); }
.platform-card.p-vimeo:hover { border-color: var(--color-vimeo); }
.platform-card.p-dm    .p-icon { background: rgba(0,184,245,0.1); }
.platform-card.p-dm    .p-icon svg { color: var(--color-dm); }
.platform-card.p-dm:hover    { border-color: var(--color-dm); }

.platform-card .p-name {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}
.platform-card .p-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-header-bg);
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 52px 24px 28px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 44px;
}
.footer-brand .site-logo { margin-bottom: 14px; }
.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.45);
  line-height: 1.65;
  max-width: 280px;
}
.footer-col-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: 14px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
}
.footer-links a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255,255,255,0.3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============================================================
   UTILITY & PAGE CONTENT
   ============================================================ */
.page-content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 24px 64px;
}
.page-content h1 {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 28px;
  color: var(--color-text);
}
.page-content h2 {
  font-size: 20px;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 10px;
  color: var(--color-text);
}
.page-content h3 {
  font-size: 16px;
  font-weight: 700;
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--color-text);
}
.page-content p, .page-content li {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 12px;
}
.page-content ul, .page-content ol {
  padding-left: 20px;
  margin-bottom: 12px;
}

/* Error / notification */
.notice {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 24px;
}
.notice-error {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.25);
  color: #EF4444;
}
.notice-success {
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  color: var(--color-success);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .header-nav { display: none; }
  
  /* Hides switchers in the normal header bar */
  .desktop-switchers { display: none; }
  
  .header-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--color-header-bg);
    padding: 12px 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.07);
    z-index: 99;
  }
  
  /* Shows the switchers at the bottom of the open mobile menu */
  .mobile-switchers {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 16px;
    margin-top: 12px;
    padding-top: 16px;
    border-top: 1px solid rgba(255,255,255,0.07);
  }
  
  .nav-toggle { display: flex; }
}
@media (max-width: 640px) {
  .hero { padding: 40px 16px 52px; }
  .downloader-box { padding: 20px 16px 18px; }
  .form-row { flex-direction: column; }
  .url-submit { justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .platform-tabs { gap: 6px; }
  .platform-tab { padding: 7px 13px; font-size: 13px; }
  .header-inner { padding: 0 16px; }
  .hero-title { font-size: 28px; }
}