/* --- Design Tokens --- */
:root {
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* HSL Tailored Colors */
  --bg-main: hsl(222, 47%, 6%);
  --bg-card: hsl(223, 30%, 11%, 0.7);
  --bg-input: hsl(223, 25%, 15%);
  --border-color: hsl(223, 20%, 20%);
  --border-glow: hsl(263, 70%, 50%, 0.3);
  
  --primary: hsl(263, 70%, 50%);
  --primary-hover: hsl(263, 80%, 56%);
  --primary-glow: hsl(263, 70%, 50%, 0.4);
  
  --accent: hsl(190, 90%, 50%);
  --accent-hover: hsl(190, 100%, 56%);
  
  --text-primary: hsl(0, 0%, 96%);
  --text-secondary: hsl(220, 15%, 70%);
  --text-muted: hsl(220, 10%, 50%);
  
  --success: hsl(145, 80%, 42%);
  --danger: hsl(355, 85%, 55%);
  --danger-hover: hsl(355, 95%, 60%);
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
}

/* --- Base Rules --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 10% 20%, hsl(260, 40%, 15%) 0px, transparent 50%),
    radial-gradient(at 90% 80%, hsl(190, 30%, 15%) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- Utilities --- */
.hide {
  display: none !important;
}

/* --- Screens --- */
.screen {
  opacity: 0;
  pointer-events: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 2rem;
  transition: var(--transition-smooth);
}

.screen.active {
  opacity: 1;
  pointer-events: all;
  position: relative;
  min-height: 100vh;
}

/* --- Auth Screen Styling --- */
#auth-screen {
  display: flex;
  justify-content: center;
  align-items: center;
}

.auth-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  padding: 3rem;
  border-radius: 24px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--glass-shadow);
  text-align: center;
  animation: floatIn 0.6s ease-out;
}

.logo {
  margin-bottom: 2.5rem;
}

.logo-icon {
  font-size: 3rem;
  display: inline-block;
  margin-bottom: 0.5rem;
  filter: drop-shadow(0 0 10px var(--primary));
  animation: pulseGlow 2s infinite ease-in-out;
}

.logo h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo p {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 0.25rem;
}

/* --- Inputs and Forms --- */
.input-group {
  margin-bottom: 1.5rem;
  text-align: left;
}

.input-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-group input,
.input-group textarea {
  width: 100%;
  padding: 0.85rem 1.2rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

.input-group input:focus,
.input-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-glow);
}

.helper-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

.error-text {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 1rem;
  animation: shake 0.3s ease-in-out;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  border-radius: 12px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition-smooth);
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), hsl(263, 80%, 40%));
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover), var(--primary));
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-secondary {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--border-color);
  border-color: var(--text-secondary);
  transform: translateY(-2px);
}

.btn-text {
  background: transparent;
  color: var(--text-secondary);
}

.btn-text:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.btn-danger {
  background: transparent;
  border: 1px solid var(--danger);
  color: var(--danger);
}

.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}

/* --- Dashboard Header --- */
.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2.5rem;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-logo .logo-icon {
  font-size: 2rem;
  margin-bottom: 0;
}

.header-logo h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

.header-logo p {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-actions .btn {
  width: auto;
}

/* --- Apps Grid & Cards --- */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 2rem;
}

.app-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
}

.app-card:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 32px var(--border-glow);
  transform: translateY(-4px);
}

.app-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.app-title-group h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
}

.app-badge {
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--primary-glow);
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  text-transform: uppercase;
}

.app-version {
  font-size: 0.85rem;
  background: var(--border-color);
  color: var(--text-primary);
  padding: 0.25rem 0.65rem;
  border-radius: 8px;
  font-weight: 600;
}

.app-info-row {
  margin-bottom: 1.25rem;
}

.app-info-row .label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: block;
  margin-bottom: 0.35rem;
}

.app-download-link {
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  word-break: break-all;
}

.app-download-link:hover {
  text-decoration: underline;
  color: var(--accent-hover);
}

.app-changelog {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  background: rgba(0, 0, 0, 0.2);
  padding: 0.85rem;
  border-radius: 10px;
  border-left: 3px solid var(--primary);
  max-height: 120px;
  overflow-y: auto;
}

.app-card-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 2rem;
}

.app-card-actions .btn {
  flex: 1;
  padding: 0.65rem 1rem;
  font-size: 0.85rem;
}

/* --- Modals --- */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(6, 9, 20, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 1;
  transition: var(--transition-smooth);
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--glass-shadow);
  border-radius: 24px;
  width: 100%;
  max-width: 520px;
  padding: 2.5rem;
  position: relative;
  animation: modalScale 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.modal-header h3 {
  font-size: 1.5rem;
  font-weight: 600;
}

.close-btn {
  background: transparent;
  border: none;
  font-size: 1.75rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
}

.close-btn:hover {
  color: var(--text-primary);
}

.modal-footer {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.modal-footer .btn {
  width: auto;
}

.justify-end {
  justify-content: flex-end;
}

/* --- Upload Area --- */
.upload-card {
  max-width: 460px;
  text-align: center;
}

.upload-card h3 {
  margin-bottom: 0.5rem;
}

.upload-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.upload-zone {
  border: 2px dashed var(--border-color);
  border-radius: 16px;
  padding: 3rem 1.5rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  background: rgba(0, 0, 0, 0.1);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--primary);
  background: var(--primary-glow);
}

.upload-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 1rem;
}

.upload-prompt p {
  margin-bottom: 0;
  font-size: 0.9rem;
}

.upload-prompt span {
  color: var(--accent);
  font-weight: 600;
}

/* --- Progress Bar --- */
.progress-bar-container {
  width: 100%;
  height: 20px;
  background-color: var(--bg-input);
  border-radius: 10px;
  overflow: hidden;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: width 0.1s ease;
}

#upload-status {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Animations --- */
@keyframes floatIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes modalScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulseGlow {
  0%, 100% {
    filter: drop-shadow(0 0 5px var(--primary-glow));
  }
  50% {
    filter: drop-shadow(0 0 15px var(--primary));
  }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}