/* Reset e variáveis */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --tiktok-black: #000000;
  --tiktok-dark: #161823;
  --tiktok-darker: #0f1419;
  --tiktok-red: #fe2c55;
  --tiktok-blue: #25f4ee;
  --tiktok-white: #ffffff;
  --tiktok-gray: #8a8b9b;
  --tiktok-light-gray: #f1f1f2;
  --tiktok-border: rgba(255, 255, 255, 0.1);
  --tiktok-accent: #ff0050;
  --tiktok-cyan: #00f5ff;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--tiktok-black);
  color: var(--tiktok-white);
  overflow-x: hidden;
  line-height: 1.6;
}

/* -- POPUPS -- */
.popup, .recovery-popup {
  position: fixed; top:0; left:0;
  width:100%; height:100%;
  background: rgba(0,0,0,0.9);
  display:flex; justify-content:center; align-items:center;
  z-index:10000; backdrop-filter: blur(20px);
}
.popup-content, .recovery-content {
  position: relative;
  display:flex; flex-direction:column;
  background: linear-gradient(135deg,var(--tiktok-dark),var(--tiktok-darker));
  padding:40px; border-radius:20px;
  width:420px; max-width:90vw; text-align:center;
  box-shadow:0 25px 50px rgba(254,44,85,0.3);
  border:1px solid var(--tiktok-border);
  overflow:hidden;
}
.popup-content::before, .recovery-content::before {
  content:''; position:absolute; top:0; left:0; right:0; height:4px;
  background: linear-gradient(135deg,var(--tiktok-red),var(--tiktok-cyan));
  background-size:200% 200%; animation:gradient-shift 3s ease infinite;
}
/* Títulos */
.popup-content h3, .recovery-content h3 {
  font-size:28px; font-weight:900; margin-bottom:8px;
  background: linear-gradient(135deg,var(--tiktok-red),var(--tiktok-cyan));
  -webkit-background-clip:text; color:transparent;
}
/* Subtítulos */
.popup-subtitle, .recovery-subtitle {
  font-size:14px; color:var(--tiktok-gray);
  margin-bottom:32px; font-weight:500; line-height:1.5;
}
/* Inputs */
.popup-content input, .recovery-content input {
  padding:16px 20px; margin-bottom:16px;
  border:2px solid var(--tiktok-border); border-radius:12px;
  background: var(--tiktok-darker); color:var(--tiktok-white);
  font-size:16px; font-weight:500; width:100%;
  transition:all .3s cubic-bezier(.4,0,.2,1);
}
.popup-content input:focus, .recovery-content input:focus {
  outline:none; border-color:var(--tiktok-red);
  box-shadow:0 0 0 4px rgba(254,44,85,0.15);
  transform: translateY(-2px);
  background: rgba(15,20,25,0.8);
}
.popup-content input::placeholder, .recovery-content input::placeholder {
  color:var(--tiktok-gray); font-weight:400;
}
/* Botões principais */
.popup-content button:not(.close-btn), .recovery-content button:not(.close-btn) {
  width:100%; padding:16px;
  background: linear-gradient(135deg,var(--tiktok-red),var(--tiktok-accent) 50%,var(--tiktok-cyan));
  background-size:200% 200%; border:none; color:var(--tiktok-white);
  border-radius:12px; cursor:pointer; font-weight:700;
  font-size:16px; text-transform:uppercase; letter-spacing:1px;
  transition:all .3s cubic-bezier(.4,0,.2,1);
  box-shadow:0 8px 25px rgba(254,44,85,0.3);
  position:relative; overflow:hidden; margin-bottom:12px;
}
.popup-content button:hover:enabled:not(.close-btn),
.recovery-content button:hover:enabled:not(.close-btn) {
  transform: translateY(-3px);
  box-shadow:0 12px 35px rgba(254,44,85,0.4);
  animation:gradient-shift 2s ease infinite;
}
.popup-content button:disabled:not(.close-btn),
.recovery-content button:disabled:not(.close-btn) {
  background:var(--tiktok-gray); cursor:not-allowed;
  transform:none; box-shadow:none; animation:none; opacity:.6;
}
.popup-content button::before:not(.close-btn),
.recovery-content button::before:not(.close-btn) {
  content:''; position:absolute; top:0; left:-100%; width:100%; height:100%;
  background: linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);
  transition:left .6s;
}
.popup-content button:hover::before:not(.close-btn),
.recovery-content button:hover::before:not(.close-btn) {
  left:100%;
}
/* Botão fechar */
.close-btn {
  position:absolute; top:16px; right:16px;
  background:none; border:none; color:var(--tiktok-gray);
  font-size:24px; cursor:pointer; padding:8px; border-radius:8px;
  transition:all .3s ease; display:flex; align-items:center;
  justify-content:center; min-width:40px; min-height:40px;
}
.close-btn:hover {
  background: rgba(255,255,255,0.1);
  color: var(--tiktok-white);
}
/* Links */
.forgot-password-link, .back-to-login-link {
  margin:16px 0 24px; text-align:center;
}
.forgot-password-link span, .back-to-login-link span {
  color:var(--tiktok-cyan); font-size:14px; font-weight:500;
  cursor:pointer; text-decoration:none;
  transition:all .3s ease;
}
.forgot-password-link span:hover, .back-to-login-link span:hover {
  color:var(--tiktok-white);
  transform: translateY(-1px);
}

/* Register button */
.register-button {
  width:100%; padding:16px; display:flex; align-items:center; justify-content:center;
  background: linear-gradient(135deg,var(--tiktok-cyan),var(--tiktok-blue) 50%,var(--tiktok-red));
  background-size:200% 200%; border:none; color:var(--tiktok-white);
  border-radius:12px; cursor:pointer; font-weight:700; font-size:16px;
  text-transform:uppercase; letter-spacing:1px; transition:all .3s cubic-bezier(.4,0,.2,1);
  box-shadow:0 8px 25px rgba(37,244,238,0.3); position:relative; overflow:hidden;
  margin-bottom:12px; text-decoration:none;
}
.register-button:hover {
  transform: translateY(-3px);
  box-shadow:0 12px 35px rgba(37,244,238,0.4);
  animation:gradient-shift 2s ease infinite;
}
.register-button::before {
  content:''; position:absolute; top:0; left:-100%; width:100%; height:100%;
  background: linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);
  transition:left .6s;
}
.register-button:hover::before { left:100%; }

/* Divider */
.divider {
  display:flex; align-items:center; margin:20px 0 24px;
  font-size:12px; color:var(--tiktok-gray); font-weight:500;
}
.divider::before, .divider::after {
  content:''; flex:1; height:1px; background:var(--tiktok-border);
}
.divider span { padding:0 16px; text-transform:uppercase; letter-spacing:1px; }

/* Erros / mensagens */
#loginError, #recoveryError {
  color:var(--tiktok-red); font-size:14px; font-weight:500;
  margin-top:16px; padding:12px; border-radius:8px;
  background:rgba(254,44,85,0.1); border:1px solid rgba(254,44,85,0.3);
  display:none;
}
#loginError.show, #recoveryError.show { display:block; }
#recoveryMessage {
  color:var(--tiktok-cyan); font-size:14px; font-weight:500;
  margin-top:16px; padding:12px; border-radius:8px;
  background:rgba(37,244,238,0.1); border:1px solid rgba(37,244,238,0.3);
  display:none;
}
#recoveryMessage.show { display:block; }

/* Animações */
@keyframes gradient-shift {
  0% { background-position:0% 50%; }
  50% { background-position:100% 50%; }
  100% { background-position:0% 50%; }
}

/* HEADER */
.header {
  position:fixed; top:0; left:0; right:0;
  background: linear-gradient(135deg,var(--tiktok-black),var(--tiktok-dark));
  border-bottom:1px solid var(--tiktok-border);
  z-index:1000; backdrop-filter: blur(20px);
  box-shadow:0 8px 32px rgba(0,0,0,0.4);
}
.header-top {
  height:72px; display:flex; align-items:center;
  justify-content:space-between; padding:0 32px;
}
.logo { display:flex; align-items:center; gap:12px; cursor:pointer; transition:all .3s ease; }
.logo:hover { transform: scale(1.05); }
.logo-icon {
  width:32px; height:32px; background: linear-gradient(135deg,var(--tiktok-red),var(--tiktok-cyan));
  border-radius:8px; display:flex; align-items:center; justify-content:center;
  position:relative; overflow:hidden; font-size:18px; font-weight:900; color:white;
}
.logo-icon img {
  width:20px; height:20px; object-fit:contain; filter:brightness(0) invert(1);
}
.logo-icon::before {
  content:''; position:absolute; top:-50%; left:-50%; width:200%; height:200%;
  background: linear-gradient(45deg,transparent,rgba(255,255,255,.3),transparent);
  transform:rotate(45deg); animation:shine 3s infinite;
}
@keyframes shine {
  0% { transform:translate(-100%,-100%) rotate(45deg); }
  50% { transform:translate(100%,100%) rotate(45deg); }
  100% { transform:translate(-100%,-100%) rotate(45deg); }
}
.logo-text { display:flex; flex-direction:column; line-height:1; }
.logo-main {
  font-size:28px; font-weight:900;
  background: linear-gradient(135deg,var(--tiktok-red),var(--tiktok-cyan));
  -webkit-background-clip:text; color:transparent;
}
.header-actions { display:flex; align-items:center; gap:16px; }
.trending-badge {
  background: linear-gradient(135deg,var(--tiktok-cyan),var(--tiktok-blue) 50%,var(--tiktok-red));
  background-size:200% 200%; animation:gradient-shift 3s ease infinite;
  color:var(--tiktok-white); padding:10px 20px; border-radius:16px;
  font-size:12px; font-weight:700; text-transform:uppercase; letter-spacing:1px;
  box-shadow:0 4px 15px rgba(37,244,238,0.3); text-decoration:none;
  transition:all .3s ease; width:120px; height:40px; display:flex; 
  justify-content:center; align-items:center; cursor:pointer;
}
.trending-badge:hover {
  transform: translateY(-2px);
  box-shadow:0 6px 20px rgba(37,244,238,0.4);
}

/* Botão Sair (Logout) */
.logout-btn {
  background: linear-gradient(135deg,var(--tiktok-red),var(--tiktok-accent) 50%,var(--tiktok-cyan));
  background-size:200% 200%; border:none; color:var(--tiktok-white);
  padding:10px 20px; border-radius:16px; font-size:12px; font-weight:700;
  cursor:pointer; text-transform:uppercase; letter-spacing:1px;
  text-decoration:none; transition:all .3s ease;
  box-shadow:0 4px 15px rgba(254,44,85,0.3);
  width:120px; height:40px; display:flex;
  justify-content:center; align-items:center;
}
.logout-btn:hover {
  transform: translateY(-2px);
  box-shadow:0 6px 20px rgba(254,44,85,0.4);
}

/* SEARCH AREA */
.header-search {
  padding:24px 32px 28px; background:rgba(0,0,0,0.3);
  border-top:1px solid var(--tiktok-border);
}
.search-container { max-width:1400px; margin:0 auto; }
.search-form {
  display:grid; grid-template-columns:2fr 1fr 1fr 1fr auto; gap:20px;
  align-items:end;
}
.form-group { display:flex; flex-direction:column; gap:10px; }
.form-label {
  font-size:12px; font-weight:600; color:rgba(255,255,255,.9);
  margin-left:4px; text-transform:uppercase; letter-spacing:1px;
  display:flex; align-items:center; gap:6px;
}
.form-input, .select-input {
  height:52px; background:var(--tiktok-dark); border:2px solid var(--tiktok-border);
  border-radius:16px; padding:0 20px; color:var(--tiktok-white);
  font-size:16px; font-weight:500; transition:all .3s cubic-bezier(.4,0,.2,1);
  position:relative;
}
.form-input:focus, .select-input:focus {
  outline:none; border-color:var(--tiktok-red);
  box-shadow:0 0 0 4px rgba(254,44,85,0.15);
  transform: translateY(-2px);
  background: rgba(22,24,35,0.8);
}
.form-input::placeholder { color:var(--tiktok-gray); font-weight:400; }
.select-input {
  cursor:pointer; appearance:none;
  background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position:right 12px center; background-repeat:no-repeat; background-size:16px;
  padding-right:40px;
}
.select-input option {
  background:var(--tiktok-dark); color:var(--tiktok-white); padding:12px; font-weight:500;
}
.search-btn {
  height:52px; padding:0 32px;
  background: linear-gradient(135deg,var(--tiktok-red),var(--tiktok-accent) 50%,var(--tiktok-cyan));
  background-size:200% 200%; border:none; border-radius:16px;
  color:var(--tiktok-white); font-weight:700; font-size:16px;
  cursor:pointer; transition:all .3s cubic-bezier(.4,0,.2,1);
  box-shadow:0 8px 25px rgba(254,44,85,0.3);
  text-transform:uppercase; letter-spacing:1px;
  position:relative; overflow:hidden;
}
.search-btn:hover {
  transform: translateY(-3px); box-shadow:0 12px 35px rgba(254,44,85,0.4);
  animation:gradient-shift 2s ease infinite;
}
.search-btn:active { transform: translateY(-1px); }
.search-btn:disabled {
  background:var(--tiktok-gray); cursor:not-allowed;
  transform:none; box-shadow:none; animation:none; opacity:.6;
}
.search-btn::before {
  content:''; position:absolute; top:0; left:-100%; width:100%; height:100%;
  background: linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);
  transition:left .6s;
}
.search-btn:hover::before { left:100%; }

/* MAIN CONTENT */
.main-content {
  margin-top:164px; padding:40px 32px; min-height:calc(100vh - 164px);
}
.videos-grid {
  display:grid; grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:24px; max-width:1400px; margin:0 auto;
}

/* VIDEO CARD */
.video-card {
  background: linear-gradient(135deg,var(--tiktok-dark),var(--tiktok-darker));
  border-radius:20px; overflow:hidden;
  transition:all .3s cubic-bezier(.4,0,.2,1);
  border:1px solid var(--tiktok-border); position:relative;
  box-shadow:0 25px 50px rgba(254,44,85,0.15);
}
.video-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:4px;
  background: linear-gradient(135deg,var(--tiktok-red),var(--tiktok-cyan));
  background-size:200% 200%; animation:gradient-shift 3s ease infinite;
  z-index:2;
}
.video-card:hover {
  transform: translateY(-8px);
  box-shadow:0 35px 70px rgba(254,44,85,0.25);
  border-color:var(--tiktok-red);
}
.video-card:hover::before { animation-duration:1.5s; }

.video-wrapper {
  position:relative; width:100%; aspect-ratio:9/16;
  background:var(--tiktok-darker); overflow:hidden; margin-top:4px;
}
.video-player {
  width:100%; height:100%; object-fit:cover;
  transition:transform .3s ease;
}
.video-card:hover .video-player { transform: scale(1.05); }

.video-info {
  padding:20px; background: linear-gradient(135deg,var(--tiktok-dark),var(--tiktok-darker));
}
.video-title {
  font-size:14px; font-weight:600; color:var(--tiktok-white);
  margin-bottom:12px; line-height:1.4;
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical;
  overflow:hidden; height:40px;
}
.video-author {
  display:flex; align-items:center; gap:10px; margin-bottom:16px;
}
.author-avatar {
  width:32px; height:32px; border-radius:50%;
  background: linear-gradient(135deg,var(--tiktok-red),var(--tiktok-cyan));
  display:flex; align-items:center; justify-content:center;
  position:relative; overflow:hidden; font-size:12px; font-weight:700; color:var(--tiktok-white);
}
.author-avatar::before {
  content:''; position:absolute; top:-50%; left:-50%;
  width:200%; height:200%;
  background: linear-gradient(45deg,transparent,rgba(255,255,255,.2),transparent);
  transform:rotate(45deg); animation:shine 4s infinite;
}
.author-name {
  font-size:14px; font-weight:600;
  background: linear-gradient(135deg,var(--tiktok-white),var(--tiktok-cyan));
  -webkit-background-clip:text; color:transparent;
}

.video-stats {
  display:flex; justify-content:center; align-items:center;
  border-top:1px solid var(--tiktok-border); padding-top:16px; margin-top:16px;
}
.stats-left {
  display:flex; gap:10px; flex-wrap:nowrap;
}
.stat-item {
  display:flex; align-items:center; gap:6px;
  color:var(--tiktok-gray); font-size:12px; font-weight:500;
  transition:all .3s ease; padding:4px 8px; border-radius:8px;
  background:rgba(255,255,255,0.05);
}
.stat-item:hover {
  color:var(--tiktok-cyan); background:rgba(37,244,238,0.1);
  transform: translateY(-1px);
}
.stat-icon {
  width:16px; height:16px; opacity:.8; transition:opacity .3s ease;
}
.stat-item:hover .stat-icon { opacity:1; }

/* LOADING */
.loading {
  display:flex; flex-direction:column;
  justify-content:center; align-items:center;
  padding:80px 20px; color:var(--tiktok-gray);
}
.spinner {
  width:40px; height:40px;
  border:3px solid var(--tiktok-border);
  border-top:3px solid var(--tiktok-red);
  border-radius:50%; animation:spin 1s linear infinite;
  margin-bottom:16px;
}
@keyframes spin { 0%{transform:rotate(0)}100%{transform:rotate(360deg)} }
.loading-text { font-size:14px; font-weight:500; }

/* EMPTY / ERROR */
.empty-state, .error-state {
  grid-column:1/-1; text-align:center; padding:80px 20px;
  color:var(--tiktok-gray);
}
.empty-state h3, .error-state h3 {
  font-size:24px; font-weight:700; color:var(--tiktok-white);
  margin-bottom:12px;
}
.empty-state p, .error-state p { font-size:16px; opacity:.8; }
.empty-state .emoji, .error-state .emoji {
  font-size:64px; margin-bottom:20px; display:block;
}

/* TIKTOK LOGOS ANIMATION */
.tiktok-logos-container {
  position:fixed; top:0; left:0; width:100%; height:100%;
  pointer-events:none; z-index:10; overflow:hidden;
}
.tiktok-logo-floating {
  position:absolute; opacity:.4; animation:blurFocus 4s ease-in-out infinite;
}
.tiktok-logo-floating img {
  width:100%; height:100%; object-fit:contain;
}
@keyframes blurFocus {
  0%{filter:blur(8px);opacity:.2}
  50%{filter:blur(0);opacity:.8}
  100%{filter:blur(8px);opacity:.2}
}
/* Exemplos de posição/size para cada logo */
.tiktok-logo-floating:nth-child(1){top:15%;left:10%;width:60px;height:60px;animation-delay:0s;}
.tiktok-logo-floating:nth-child(2){top:25%;left:85%;width:40px;height:40px;animation-delay:-1s;}
/* ... e assim por diante até o 10º */

/* RESPONSIVE */
@media (max-width:1200px) {
  .search-form { grid-template-columns:1fr 1fr 1fr; gap:16px; }
  .search-btn { grid-column:span 3; margin-top:8px; }
}
@media (max-width:768px) {
  .header-top { height:60px; padding:0 20px; }
  .logo-main { font-size:24px; }
  .logo-icon { width:28px; height:28px; font-size:16px; }
  .trending-badge { display:none; }
  .header-search { padding:20px; }
  .search-form { grid-template-columns:1fr; gap:16px; }
  .search-btn { grid-column:span 1; height:56px; font-size:18px; }
  .form-input, .select-input { height:48px; font-size:16px; }
  .main-content { margin-top:144px; padding:24px 20px; }
  .videos-grid { grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:20px; }
  .popup-content, .recovery-content { width:350px; padding:32px 24px; }
  .popup-content h3, .recovery-content h3 { font-size:24px; }
}
@media (max-width:480px) {
  .header-top { padding:0 16px; }
  .header-search { padding:16px; }
  .logo-main { font-size:20px; }
  .form-input, .select-input { height:44px; padding:0 16px; font-size:15px; }
  .search-btn { height:50px; font-size:16px; padding:0 24px; }
  .main-content { margin-top:134px; padding:20px 16px; }
  .videos-grid { grid-template-columns:1fr; gap:16px; }
  .video-info { padding:16px; }
  .stats-left { gap:12px; }
  .popup-content, .recovery-content { width:320px; padding:28px 20px; }
  .popup-content h3, .recovery-content h3 { font-size:22px; }
}