/* ==========================================================================
   Facebook Video Downloader Without Watermark - Official Styling
   Clean, Minimal, Modern Layout with Authentic Facebook Blue Branding
   ========================================================================== */

:root {
  /* Official Facebook Brand Palette */
  --fb-blue: #1877F2;
  --fb-blue-hover: #166FE5;
  --fb-blue-dark: #0D65D9;
  --fb-blue-subtle: #E7F3FF;
  --fb-blue-light: #F0F2F5;
  
  /* Neutral Colors */
  --color-black: #050505;
  --color-white: #FFFFFF;
  --color-gray-dark: #1C1E21;
  --color-gray-mid: #65676B;
  --color-gray-light: #F0F2F5;
  --color-border: #CED0D4;
  --color-border-light: #E4E6EB;
  
  /* Status Colors */
  --color-error-bg: #FFEBE9;
  --color-error-border: #FA755A;
  --color-error-text: #C32A2A;
  --color-success-bg: #E7F3FF;
  --color-success-border: #1877F2;
  --color-success-text: #1877F2;

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.18);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-white);
  color: var(--color-black);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   1. Minimal Header: ONLY the Official Facebook Logo
   ========================================================================== */
.header {
  background: var(--fb-blue);
  width: 100%;
  padding: 24px 20px 14px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.header-inner {
  display: flex;
  justify-content: center;
  align-items: center;
}

.logo-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), filter 0.2s ease;
}

.logo-link:hover {
  transform: scale(1.08);
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.25));
}

.fb-logo {
  width: 48px;
  height: 48px;
  display: block;
}

/* ==========================================================================
   2. Hero Section: Facebook Blue Background
   ========================================================================== */
.hero-section {
  background: var(--fb-blue);
  padding: 12px 20px 72px 20px;
  width: 100%;
  position: relative;
}

.hero-container {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: #FFFFFF;
  margin-bottom: 12px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.hero-subtitle {
  font-size: 1.125rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 34px;
  letter-spacing: -0.01em;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}

/* URL Input & Download Form */
.downloader-form {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 12px;
  background: #FFFFFF;
  padding: 8px 8px 8px 18px;
  border-radius: var(--radius-pill);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.22);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.downloader-form:focus-within {
  transform: translateY(-2px);
  box-shadow: 0 16px 42px rgba(0, 0, 0, 0.28);
}

.input-wrapper {
  display: flex;
  align-items: center;
  flex: 1;
  gap: 10px;
  position: relative;
}

.paste-btn, .clear-btn {
  background: none;
  border: none;
  color: var(--color-gray-mid);
  cursor: pointer;
  padding: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.paste-btn:hover {
  color: var(--fb-blue);
  background-color: var(--fb-blue-light);
}

.clear-btn:hover {
  color: var(--color-black);
  background-color: var(--fb-blue-light);
}

.url-input {
  flex: 1;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-black);
  background: transparent;
  min-width: 0;
}

.url-input::placeholder {
  color: #8A8D91;
  font-weight: 400;
}

.download-btn {
  background: var(--color-black);
  color: #FFFFFF;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  white-space: nowrap;
  min-width: 130px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.download-btn:hover {
  background: #1C1E21;
  transform: scale(1.02);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}

.download-btn:active {
  transform: scale(0.98);
}

.download-btn:disabled {
  opacity: 0.75;
  cursor: not-allowed;
  transform: none;
}

/* Spinner */
.spinner {
  width: 20px;
  height: 20px;
  animation: rotate 1s linear infinite;
}

.spinner-track {
  opacity: 0.25;
}

.spinner-head {
  opacity: 0.85;
}

@keyframes rotate {
  100% {
    transform: rotate(360deg);
  }
}

/* Loading Feedback */
.status-container {
  margin-top: 24px;
}

.status-loading {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #FFFFFF;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #FFFFFF;
  animation: pulse 1.4s ease-in-out infinite;
}

@keyframes pulse {
  0% { transform: scale(0.8); opacity: 0.5; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.8); opacity: 0.5; }
}

/* Error Alert */
.error-container {
  margin-top: 24px;
  background: #FFFFFF;
  border: 1px solid var(--color-error-border);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  text-align: left;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  animation: slideDown 0.25s ease-out;
}

.error-icon {
  color: var(--color-error-text);
  flex-shrink: 0;
  margin-top: 2px;
}

.error-content strong {
  display: block;
  font-size: 0.95rem;
  color: var(--color-error-text);
  margin-bottom: 2px;
}

.error-content p {
  font-size: 0.875rem;
  color: var(--color-gray-dark);
  line-height: 1.4;
}

/* Result Card */
.result-container {
  margin-top: 32px;
  animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.result-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  text-align: left;
  border: 1px solid var(--color-border-light);
}

.result-video-wrapper {
  background: #000000;
  width: 100%;
  max-height: 440px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.video-preview {
  width: 100%;
  max-height: 440px;
  display: block;
  outline: none;
}

.result-details {
  padding: 24px 28px 28px 28px;
}

.result-meta-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.watermark-badge {
  background: var(--fb-blue-subtle);
  color: var(--fb-blue);
  border: 1px solid rgba(24, 119, 242, 0.25);
}

.quality-badge {
  background: #E8F5E9;
  color: #2E7D32;
  border: 1px solid rgba(46, 125, 50, 0.25);
}

.video-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 4px;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.video-creator {
  font-size: 0.9rem;
  color: var(--color-gray-mid);
  margin-bottom: 16px;
  font-weight: 500;
}

/* Quality Selector */
.quality-selector-wrapper {
  margin-bottom: 18px;
  padding: 12px 14px;
  background: var(--fb-blue-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.quality-select-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-gray-dark);
}

.quality-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.quality-btn {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  color: var(--color-gray-dark);
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.15s ease;
}

.quality-btn:hover {
  border-color: var(--fb-blue);
  color: var(--fb-blue);
}

.quality-btn.active {
  background: var(--fb-blue);
  color: #FFFFFF;
  border-color: var(--fb-blue);
}

.meta-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 22px;
}

.meta-item {
  display: flex;
  flex-direction: column;
}

.meta-label {
  font-size: 0.75rem;
  color: var(--color-gray-mid);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 2px;
}

.meta-val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-black);
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  width: 100%;
}

.download-action-btn {
  background: var(--fb-blue);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(24, 119, 242, 0.35);
}

.download-action-btn:hover {
  background: var(--fb-blue-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(24, 119, 242, 0.45);
}

.secondary-action-btn {
  background: var(--fb-blue-light);
  color: var(--color-black);
}

.secondary-action-btn:hover {
  background: var(--color-border-light);
}

.text-action-btn {
  background: transparent;
  color: var(--color-gray-mid);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 8px 12px;
}

.text-action-btn:hover {
  color: var(--color-black);
  text-decoration: underline;
}

/* ==========================================================================
   3. Content Section: Pure White Background (#FFFFFF)
   ========================================================================== */
.content-section {
  background: var(--color-white);
  padding: 72px 20px;
  flex: 1;
  width: 100%;
}

.content-container {
  max-width: 960px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-black);
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 40px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}

.step-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.step-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(24, 119, 242, 0.35);
}

.step-badge {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--fb-blue);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 1.15rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(24, 119, 242, 0.3);
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 10px;
}

.step-desc {
  font-size: 0.925rem;
  color: var(--color-gray-mid);
  line-height: 1.55;
}

.content-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: 48px 0;
  width: 100%;
}

/* Watermark Transparency Notice */
.info-block {
  max-width: 820px;
  margin: 0 auto;
}

.info-note {
  background: var(--fb-blue-subtle);
  border: 1px solid rgba(24, 119, 242, 0.25);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.info-icon {
  color: var(--fb-blue);
  flex-shrink: 0;
  margin-top: 2px;
}

.info-text strong {
  display: block;
  font-size: 1rem;
  color: var(--color-black);
  margin-bottom: 6px;
}

.info-text p {
  font-size: 0.9rem;
  color: #333333;
  line-height: 1.6;
}

/* ==========================================================================
   4. Minimal Footer
   ========================================================================== */
.footer {
  background: #F8F9FA;
  border-top: 1px solid var(--color-border-light);
  padding: 32px 20px;
  text-align: center;
}

.footer-container {
  max-width: 820px;
  margin: 0 auto;
}

.footer-disclaimer {
  font-size: 0.8rem;
  color: var(--color-gray-mid);
  line-height: 1.5;
  margin-bottom: 8px;
}

.footer-copy {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-gray-dark);
}

/* ==========================================================================
   Utility & Animations
   ========================================================================== */
.hidden {
  display: none !important;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero-title {
    font-size: 1.85rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 24px;
  }
  
  .downloader-form {
    flex-direction: column;
    padding: 10px;
    border-radius: var(--radius-lg);
  }
  
  .input-wrapper {
    width: 100%;
    padding: 4px 6px;
  }
  
  .download-btn {
    width: 100%;
    padding: 14px;
  }
  
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  
  .meta-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  
  .result-details {
    padding: 20px 18px;
  }
}