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

:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #16213e;
  --bg-card-hover: #1a2744;
  --bg-input: #0d1b2a;
  --text-primary: #e0e0e0;
  --text-secondary: #8892a4;
  --text-muted: #5a6378;
  --accent-blue: #4361ee;
  --accent-green: #06d6a0;
  --accent-red: #ef476f;
  --accent-yellow: #ffd166;
  --accent-orange: #f77f00;
  --badge-alta: #ef476f;
  --badge-media: #ffd166;
  --badge-baixa: #8892a4;
  --badge-pendente: #4361ee;
  --border: #2a2a4a;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
  --transition: 0.2s ease;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

.hidden { display: none !important; }

/* === Screens === */
.screen {
  min-height: 100vh;
  min-height: 100dvh;
}

/* === Auth Screen === */
.auth-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 2rem;
  text-align: center;
}

.auth-logo {
  font-size: 4rem;
  margin-bottom: 1rem;
  filter: grayscale(0.3);
}

.auth-container h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.auth-subtitle {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 2rem;
}

.auth-form {
  width: 100%;
  max-width: 360px;
}

.auth-form label {
  display: block;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.auth-form input {
  width: 100%;
  padding: 0.85rem 1rem;
  font-size: 1rem;
  font-family: 'SF Mono', 'Menlo', monospace;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition);
}

.auth-form input:focus {
  border-color: var(--accent-blue);
}

.auth-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0.75rem 0 1.25rem;
  text-align: left;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  -webkit-user-select: none;
  user-select: none;
}

.btn-primary {
  background: var(--accent-blue);
  color: #fff;
}

.btn-primary:active {
  background: #3451d1;
  transform: scale(0.97);
}

.btn-primary:disabled {
  background: var(--border);
  color: var(--text-muted);
  cursor: not-allowed;
  transform: none;
}

.btn-block {
  width: 100%;
}

.btn-icon {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.3rem;
  padding: 0.4rem;
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition);
}

.btn-icon:active {
  color: var(--text-primary);
}

/* === App Header === */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-secondary);
  padding-top: var(--safe-top);
  border-bottom: 1px solid var(--border);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem 0.5rem;
}

.header-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.header-actions {
  display: flex;
  gap: 0.5rem;
}

/* === Tabs === */
.tabs {
  display: flex;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 0 0.75rem;
}

.tabs::-webkit-scrollbar { display: none; }

.tab-btn {
  flex-shrink: 0;
  padding: 0.5rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
  text-transform: capitalize;
}

.tab-btn.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
}

.tab-btn .tab-count {
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--bg-primary);
  color: var(--text-muted);
  padding: 0.1rem 0.4rem;
  border-radius: 10px;
  margin-left: 0.3rem;
}

.tab-btn.active .tab-count {
  background: var(--accent-blue);
  color: #fff;
}

/* === Filter Bar === */
.filter-bar {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem 1rem 0.65rem;
}

.filter-btn {
  flex: 1;
  padding: 0.4rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.filter-btn.active {
  color: #fff;
  background: var(--accent-blue);
  border-color: var(--accent-blue);
}

/* === Stats Bar === */
.stats-bar {
  display: flex;
  gap: 0.75rem;
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  white-space: nowrap;
}

.stat-item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.stat-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* === Article List === */
.article-list {
  padding: 0.75rem;
  padding-bottom: calc(2rem + var(--safe-bottom));
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* === Article Card === */
.article-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
  transition: background var(--transition);
}

.article-card.status-aprovado {
  border-left: 3px solid var(--accent-green);
}

.article-card.status-reprovado {
  opacity: 0.45;
}

.article-card.status-baixado {
  border-left: 3px solid var(--accent-blue);
}

/* Card Header */
.card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.6rem;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: 4px;
  line-height: 1.4;
}

.badge-alta { background: var(--badge-alta); color: #fff; }
.badge-media { background: var(--badge-media); color: #1a1a2e; }
.badge-baixa { background: var(--badge-baixa); color: #fff; }
.badge-pendente { background: var(--badge-pendente); color: #fff; }

.badge-pub-type {
  background: rgba(67, 97, 238, 0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(67, 97, 238, 0.3);
}

.badge-status-aprovado { background: rgba(6, 214, 160, 0.15); color: var(--accent-green); }
.badge-status-baixado { background: rgba(67, 97, 238, 0.15); color: var(--accent-blue); }

/* Card Content */
.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.4rem;
}

.card-meta {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 0.15rem;
}

.card-justificativa {
  font-size: 0.8rem;
  color: var(--accent-yellow);
  font-style: italic;
  margin: 0.6rem 0;
  padding-left: 0.6rem;
  border-left: 2px solid var(--accent-yellow);
  line-height: 1.45;
}

/* Abstract */
.card-abstract-toggle {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-blue);
  background: none;
  border: none;
  padding: 0.3rem 0;
  cursor: pointer;
  margin-bottom: 0.5rem;
}

.card-abstract {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
  display: none;
}

.card-abstract.open {
  display: block;
}

/* DOI Link */
.card-doi {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--accent-blue);
  text-decoration: none;
  margin-bottom: 0.75rem;
  word-break: break-all;
}

/* Card Actions */
.card-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.btn-approve, .btn-reject, .btn-download {
  flex: 1;
  padding: 0.65rem;
  font-size: 0.85rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-approve {
  background: var(--accent-green);
  color: #0f0f1a;
}

.btn-approve:active { transform: scale(0.96); opacity: 0.85; }

.btn-reject {
  background: var(--accent-red);
  color: #fff;
}

.btn-reject:active { transform: scale(0.96); opacity: 0.85; }

.btn-download {
  background: var(--accent-blue);
  color: #fff;
}

.btn-download:active { transform: scale(0.96); opacity: 0.85; }

.btn-undo {
  flex: 1;
  padding: 0.65rem;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-undo:active { transform: scale(0.96); }

/* === Loading === */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  color: var(--text-muted);
  gap: 1rem;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* === Empty State === */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  text-align: center;
  color: var(--text-muted);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* === Toast Notification === */
.toast {
  position: fixed;
  bottom: calc(1.5rem + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 0.7rem 1.25rem;
  background: var(--bg-card);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  z-index: 1000;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  white-space: nowrap;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.toast-success { border-left: 3px solid var(--accent-green); }
.toast.toast-error { border-left: 3px solid var(--accent-red); }
.toast.toast-info { border-left: 3px solid var(--accent-blue); }

/* === Scrollbar (desktop) === */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* === Desktop tweaks === */
@media (min-width: 600px) {
  .article-list {
    max-width: 640px;
    margin: 0 auto;
  }
  .auth-container {
    max-width: 480px;
    margin: 0 auto;
  }
}