/* ============================================================
   TWDownload — Modern Design Override
   Layered on top of Bootstrap 3 (style.css)
   ============================================================ */

/* ---------- Base & Typography ---------- */
:root {
  --tw-blue:       #1da1f2;
  --tw-blue-dark:  #0d8bd9;
  --tw-dark:       #0f1419;
  --tw-dark2:      #1c2938;
  --tw-dark3:      #1a3a5c;
  --tw-light:      #f0f4f8;
  --tw-border:     #e1e8ed;
  --tw-text:       #0f1419;
  --tw-muted:      #536471;
  --tw-white:      #ffffff;
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.07);
  --shadow-md:     0 4px 20px rgba(0,0,0,0.10);
  --shadow-lg:     0 8px 32px rgba(0,0,0,0.14);
  --radius:        16px;
  --radius-sm:     10px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--tw-light);
  color: var(--tw-text);
  font-size: 16px;
  line-height: 1.6;
  padding-top: 64px; /* compensate for fixed navbar */
}
p { font-size: 16px; }
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.15rem; }

/* ---------- Navbar ---------- */
.navbar.navbar-default {
  background: #ffffff !important;
  border: none !important;
  border-bottom: 1px solid var(--tw-border) !important;
  box-shadow: 0 2px 12px rgba(0,0,0,0.07) !important;
  min-height: 64px;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1030;
}
.navbar.navbar-default .navbar-header {
  display: flex;
  align-items: center;
  height: 64px;
}
.navbar.navbar-default .navbar-header img {
  max-height: 44px !important;
}
.navbar.navbar-default .navbar-nav > li > a {
  color: var(--tw-muted) !important;
  font-size: 14px;
  font-weight: 500;
  padding: 22px 18px !important;
  letter-spacing: 0.3px;
  transition: color 0.2s;
}
.navbar.navbar-default .navbar-nav > li > a:hover,
.navbar.navbar-default .navbar-nav > li > a:focus {
  color: var(--tw-blue) !important;
  background: transparent !important;
}
.navbar.navbar-default .navbar-toggle {
  border-color: var(--tw-border) !important;
  margin-top: 14px;
}
.navbar.navbar-default .navbar-toggle .icon-bar {
  background-color: var(--tw-muted) !important;
}
.navbar.navbar-default .navbar-collapse {
  border-top: 1px solid var(--tw-border) !important;
  background: #ffffff;
}

/* ---------- Hero Section ---------- */
.hero-section {
  background: linear-gradient(140deg, var(--tw-dark) 0%, var(--tw-dark2) 55%, var(--tw-dark3) 100%);
  padding: 60px 0 52px;
  position: relative;
  overflow: hidden;
  margin-bottom: 0;
}
.hero-section::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -15%;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(29,161,242,0.18) 0%, transparent 68%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-section::after {
  content: '';
  position: absolute;
  bottom: -35%;
  left: -8%;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(29,161,242,0.10) 0%, transparent 68%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-section .hero-title {
  color: #ffffff !important;
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin: 0 0 8px;
  line-height: 1.2;
}
.hero-section .hero-subtitle {
  color: rgba(255,255,255,0.68);
  font-size: 1.1rem;
  font-weight: 400;
  margin: 0 0 32px;
}

/* Form glass card */
.hero-form-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 28px 28px 20px;
  max-width: 640px;
  margin: 0 auto;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.hero-form-card .input-group {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0,0,0,0.25);
}
.hero-form-card .form-control,
.hero-form-card input[type=url] {
  height: 54px !important;
  border: none !important;
  border-radius: 0 !important;
  font-size: 15px;
  background: rgba(255,255,255,0.97) !important;
  color: var(--tw-text) !important;
  padding: 0 18px !important;
  box-shadow: none !important;
  -webkit-appearance: none;
}
.hero-form-card .form-control:focus {
  background: #ffffff !important;
  outline: none !important;
}
.hero-form-card .input-group-btn .btn,
.hero-form-card .btn-primary {
  height: 54px !important;
  background: var(--tw-blue) !important;
  border: none !important;
  border-radius: 0 !important;
  padding: 0 26px !important;
  font-size: 15px !important;
  font-weight: 600 !important;
  letter-spacing: 0.4px;
  transition: background 0.2s, box-shadow 0.2s;
  white-space: nowrap;
}
.hero-form-card .input-group-btn .btn:hover,
.hero-form-card .btn-primary:hover {
  background: var(--tw-blue-dark) !important;
}

.hero-example {
  text-align: center;
  margin-top: 14px;
  font-size: 12.5px;
  color: rgba(255,255,255,0.50);
  word-break: break-all;
}
.hero-example b  { color: rgba(255,255,255,0.75); }
.hero-example u  { color: rgba(255,255,255,0.60); }

/* ---------- Ad Strip ---------- */
.ad-strip {
  background: #ffffff;
  padding: 16px 0 10px;
  border-bottom: 1px solid var(--tw-border);
}

/* ---------- Share Bar ---------- */
.share-bar {
  background: #ffffff;
  border-bottom: 1px solid var(--tw-border);
  padding: 14px 0;
  text-align: center;
}
.share-bar p {
  margin: 0;
  font-size: 14px;
  color: var(--tw-muted);
}
.share-bar .btn {
  border-radius: 20px !important;
  padding: 5px 16px;
  font-size: 13px;
  font-weight: 500;
  margin-left: 8px;
}
.share-bar .btn-info    { background: #1da1f2 !important; border-color: #1da1f2 !important; }
.share-bar .btn-primary { background: #1877f2 !important; border-color: #1877f2 !important; }

/* ---------- Content Section (info + how-to) ---------- */
.content-card {
  background: var(--tw-white);
  border-radius: var(--radius);
  padding: 40px 44px;
  margin: 32px auto;
  box-shadow: var(--shadow-md);
  max-width: 900px;
}

.content-card p {
  color: var(--tw-muted);
  line-height: 1.75;
  font-size: 16px;
  margin-bottom: 14px;
}
.content-card p strong { color: var(--tw-text); }
.content-card a { color: var(--tw-blue); text-decoration: none; }
.content-card a:hover { color: var(--tw-blue-dark); text-decoration: underline; }

.content-card .how-to-header {
  background: linear-gradient(135deg, var(--tw-blue) 0%, var(--tw-blue-dark) 100%);
  color: #ffffff !important;
  border-radius: var(--radius-sm);
  padding: 14px 22px;
  font-size: 1.15rem;
  font-weight: 600;
  text-align: center;
  margin: 28px 0 18px;
  border: none;
  display: block;
}

.content-card h3 {
  font-size: 1.0rem;
  font-weight: 600;
  color: var(--tw-text);
  padding-left: 14px;
  border-left: 3px solid var(--tw-blue);
  margin: 24px 0 10px;
  line-height: 1.4;
}

.content-card img.img-thumbnail {
  border: none !important;
  border-radius: var(--radius-sm);
  box-shadow: 0 3px 14px rgba(0,0,0,0.11);
  margin: 10px auto 16px;
}

.content-card .read-more-link {
  background: var(--tw-light);
  border: 1px solid var(--tw-border);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  display: inline-block;
  margin-top: 8px;
  font-size: 14px;
  font-weight: 500;
}

/* ---------- Download Results Page ---------- */
.result-card {
  background: var(--tw-white);
  border-radius: var(--radius);
  padding: 36px 40px;
  margin: 30px auto;
  box-shadow: var(--shadow-md);
  max-width: 760px;
}

.result-card .thumb-wrap {
  margin-bottom: 16px;
}
.result-card .thumb-wrap img {
  border: none !important;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 18px rgba(0,0,0,0.14);
  max-width: 240px;
}

.result-card .tweet-title {
  font-weight: 600;
  font-size: 17px;
  color: var(--tw-text);
  margin: 8px 0 16px;
  line-height: 1.4;
}

.result-card .dl-hint {
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  font-size: 15px;
  font-weight: 500;
  color: #7a5c00;
  margin-bottom: 24px;
}

/* --- Format rows --- */
.format-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 8px;
}

.format-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fbff;
  border: 1px solid var(--tw-border);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  transition: box-shadow 0.15s, border-color 0.15s;
}
.format-row:hover {
  border-color: var(--tw-blue);
  box-shadow: 0 2px 12px rgba(29,161,242,0.12);
}

.format-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.fmt-quality {
  font-size: 17px;
  font-weight: 700;
  color: var(--tw-text);
  min-width: 72px;
}
.fmt-res {
  font-size: 14px;
  color: var(--tw-muted);
  font-variant-numeric: tabular-nums;
}
.fmt-ext {
  font-size: 12px;
  font-weight: 600;
  background: #e8f5fe;
  color: var(--tw-blue-dark);
  border-radius: 4px;
  padding: 2px 8px;
  letter-spacing: 0.5px;
}

.btn-dl {
  display: inline-block;
  background: linear-gradient(135deg, var(--tw-blue) 0%, var(--tw-blue-dark) 100%);
  color: #ffffff !important;
  font-size: 15px;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 24px;
  text-decoration: none !important;
  white-space: nowrap;
  transition: transform 0.15s, box-shadow 0.15s;
  flex-shrink: 0;
}
.btn-dl:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 16px rgba(29,161,242,0.38);
  color: #ffffff !important;
}

.result-card .btn-success {
  background: linear-gradient(135deg, #17bf63 0%, #0fa852 100%) !important;
  border: none !important;
  border-radius: 24px !important;
  padding: 11px 32px;
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.3px;
  transition: transform 0.15s, box-shadow 0.15s;
}
.result-card .btn-success:hover {
  transform: translateY(-1px);
  box-shadow: 0 5px 14px rgba(23,191,99,0.40);
}

/* ---------- Footer ---------- */
footer {
  background: #f8fafc !important;
  border-top: 1px solid var(--tw-border) !important;
  color: var(--tw-muted) !important;
  padding: 32px 0 22px !important;
  margin-top: 40px !important;
  font-size: 13px;
}
footer p         { color: var(--tw-muted) !important; margin: 5px 0; line-height: 1.6; }
footer p strong  { color: var(--tw-text) !important; }
footer p i       { color: #7a8a96 !important; }
footer .text-center { border-top: 1px solid var(--tw-border); padding-top: 16px; margin-top: 14px; }

/* ---------- 404 Page ---------- */
.error-card {
  background: var(--tw-white);
  border-radius: var(--radius);
  padding: 48px 32px;
  margin: 40px auto;
  box-shadow: var(--shadow-md);
  max-width: 700px;
  text-align: center;
}
.error-card .big-brand {
  color: var(--tw-text);
  font-weight: 700;
  font-size: 2rem;
  margin-bottom: 24px;
}
.error-card .btn-danger {
  background: linear-gradient(135deg, #e0245e 0%, #b91c4b 100%) !important;
  border: none !important;
  border-radius: 24px !important;
  padding: 12px 32px;
  font-weight: 600;
  font-size: 15px;
  margin-top: 20px;
  transition: transform 0.15s, box-shadow 0.15s;
}
.error-card .btn-danger:hover {
  transform: translateY(-1px);
  box-shadow: 0 5px 14px rgba(224,36,94,0.40);
}

/* ---------- Android guide page ---------- */
.guide-card {
  background: var(--tw-white);
  border-radius: var(--radius);
  padding: 40px 44px;
  margin: 32px auto;
  box-shadow: var(--shadow-md);
}
.guide-card h1 { font-size: 1.6rem; font-weight: 700; color: var(--tw-text); margin-bottom: 20px; }
.guide-card h2 { font-size: 1.2rem; font-weight: 600; color: var(--tw-text); margin-top: 28px; padding-bottom: 8px; border-bottom: 2px solid var(--tw-border); }
.guide-card h3 { font-size: 1.0rem; font-weight: 600; color: var(--tw-text); padding-left: 14px; border-left: 3px solid var(--tw-blue); margin: 22px 0 10px; }
.guide-card p { color: var(--tw-muted); line-height: 1.75; font-size: 16px; margin-bottom: 14px; }
.guide-card p strong { color: var(--tw-text); }
.guide-card a { color: var(--tw-blue); text-decoration: none; }
.guide-card a:hover { color: var(--tw-blue-dark); text-decoration: underline; }
.guide-card img.img-thumbnail {
  border: none !important;
  border-radius: var(--radius-sm);
  box-shadow: 0 3px 14px rgba(0,0,0,0.11);
  margin: 10px auto 16px;
}

/* ---------- SEO Content (result page) ---------- */
.seo-content { max-width: 860px; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 0; }

.faq-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--tw-border);
}
.faq-item:last-child { border-bottom: none; }

.faq-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--tw-text);
  margin: 0 0 8px;
  padding-left: 14px;
  border-left: 3px solid var(--tw-blue);
  line-height: 1.4;
}
.faq-item p {
  font-size: 16px;
  color: var(--tw-muted);
  line-height: 1.75;
  margin: 0;
}
.faq-item p strong { color: var(--tw-text); }
.faq-item a { color: var(--tw-blue); text-decoration: none; }
.faq-item a:hover { color: var(--tw-blue-dark); text-decoration: underline; }

/* Tips grid */
.tips-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 8px;
}

.tip-card {
  background: var(--tw-light);
  border: 1px solid var(--tw-border);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  transition: box-shadow 0.15s, border-color 0.15s;
}
.tip-card:hover {
  border-color: var(--tw-blue);
  box-shadow: 0 2px 12px rgba(29,161,242,0.10);
}
.tip-icon {
  font-size: 28px;
  margin-bottom: 10px;
  line-height: 1;
}
.tip-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--tw-text);
  margin: 0 0 8px;
  border: none;
  padding: 0;
}
.tip-card p {
  font-size: 14px;
  color: var(--tw-muted);
  line-height: 1.65;
  margin: 0;
}
.tip-card p strong { color: var(--tw-text); }

@media (max-width: 600px) {
  .tips-grid { grid-template-columns: 1fr; }
}

/* ---------- Loading Overlay ---------- */
#loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 20, 25, 0.70);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
#loading-overlay.active { display: flex; }

.loading-box {
  background: #ffffff;
  border-radius: var(--radius);
  padding: 44px 52px;
  text-align: center;
  box-shadow: 0 24px 64px rgba(0,0,0,0.28);
  animation: loading-pop 0.22s ease;
}
@keyframes loading-pop {
  from { transform: scale(0.88); opacity: 0; }
  to   { transform: scale(1);    opacity: 1; }
}

.loading-spinner {
  width: 54px;
  height: 54px;
  border: 5px solid var(--tw-border);
  border-top-color: var(--tw-blue);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  margin: 0 auto 20px;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-box .loading-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--tw-text);
  margin: 0 0 6px;
}
.loading-box .loading-sub {
  font-size: 13px;
  color: var(--tw-muted);
  margin: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 767px) {
  body { padding-top: 54px; }

  .navbar.navbar-default { min-height: 54px; }
  .navbar.navbar-default .navbar-header { height: 54px; }
  .navbar.navbar-default .navbar-header img { max-height: 36px !important; }

  .hero-section { padding: 36px 0 32px; }
  .hero-section .hero-title { font-size: 1.75rem; }
  .hero-section .hero-subtitle { font-size: 0.95rem; }
  .hero-form-card { padding: 18px 14px 14px; margin: 0 12px; }

  .content-card,
  .guide-card   { padding: 24px 18px; margin: 16px 12px; }
  .result-card  { padding: 20px 14px; margin: 16px 12px; }
  .error-card   { padding: 30px 16px; margin: 24px 12px; }

  .format-row   { flex-direction: column; align-items: flex-start; gap: 12px; }
  .btn-dl       { width: 100%; text-align: center; }
}