/* ==========================================================================
   UBER DESIGN SYSTEM — DARK HIGH-CONTRAST MINIMALIST
   STRICT REQUIREMENT: ZERO ROUNDED CORNERS EVERYWHERE
   ========================================================================== */

/* Universal Reset & Zero Corners */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* STRICT 0 ROUNDED CORNERS */
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:root {
  --uber-black: #000000;
  --uber-dark-gray: #0a0a0a;
  --uber-card-bg: #0d0d0d;
  --uber-border: #1f1f1f;
  --uber-border-focus: #ffffff;
  --uber-text-primary: #ffffff;
  --uber-text-secondary: #a0a0a0;
  --uber-text-muted: #666666;
  --uber-white: #ffffff;
  --uber-btn-hover: #e5e5e5;
  --uber-green: #00d26a;
}

body {
  background-color: var(--uber-black);
  color: var(--uber-text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* App Structure */
.app-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Navbar */
.navbar {
  border-bottom: 1px solid var(--uber-border);
  background-color: var(--uber-black);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--uber-white);
  text-decoration: none;
  text-transform: uppercase;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.user-pill {
  display: flex;
  align-items: center;
  background-color: #141414;
  border: 1px solid var(--uber-border);
  padding: 2px 8px;
}

.user-tag {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--uber-text-muted);
  margin-right: 8px;
  user-select: none;
}

.user-input {
  background: transparent;
  border: none !important;
  color: var(--uber-text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 6px;
  width: 130px;
  outline: none;
}

.user-input:focus {
  background-color: #1f1f1f;
  color: #ffffff;
}

.user-input::placeholder {
  color: var(--uber-text-muted);
  font-weight: 400;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: #141414;
  border: 1px solid var(--uber-border);
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--uber-green);
  display: inline-block;
}

/* Main Container */
.main-content {
  max-width: 1000px;
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px;
  flex: 1;
}

/* Hero Section */
.hero-section {
  margin-bottom: 48px;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -1.2px;
  line-height: 1.15;
  margin-bottom: 16px;
  color: var(--uber-white);
}

.hero-subtitle {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--uber-text-secondary);
  max-width: 720px;
  line-height: 1.6;
}

/* Uber Cards */
.uber-card {
  background-color: var(--uber-black);
  border: 1px solid var(--uber-border);
  margin-bottom: 32px;
}

.card-header {
  padding: 20px 28px;
  background-color: var(--uber-dark-gray);
  border-bottom: 1px solid var(--uber-border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-header.flex-between {
  justify-content: space-between;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.step-num {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--uber-text-muted);
  letter-spacing: 1px;
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.2px;
  color: var(--uber-white);
  text-transform: none;
}

.card-body {
  padding: 32px 28px;
}

/* Form Controls */
.form-field {
  margin-bottom: 24px;
}

.field-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--uber-text-secondary);
  margin-bottom: 10px;
}

.uber-input,
.uber-select {
  width: 100%;
  background-color: #141414;
  color: var(--uber-white);
  border: 1px solid #2e2e2e;
  padding: 16px 20px;
  font-size: 0.95rem;
  font-weight: 400;
  outline: none;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.uber-input:focus,
.uber-select:focus {
  border-color: var(--uber-white);
  background-color: #1a1a1a;
}

.select-wrapper {
  position: relative;
}

.select-wrapper::after {
  content: '▼';
  font-size: 0.65rem;
  color: var(--uber-text-secondary);
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

.uber-select {
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.input-action-group {
  display: flex;
  gap: 12px;
}

.input-action-group .uber-input {
  flex: 1;
}

.field-hint {
  font-size: 0.75rem;
  color: var(--uber-text-muted);
  margin-top: 8px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

/* UBER SOLID BUTTONS */
.uber-btn {
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.2px;
  padding: 16px 28px;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
  user-select: none;
  white-space: nowrap;
}

.uber-btn:active {
  transform: scale(0.99);
}

/* Primary Button: Solid White with Pure Black Text */
.uber-btn-primary {
  background-color: #ffffff !important;
  color: #000000 !important;
  border: 1px solid #ffffff !important;
}

.uber-btn-primary:hover {
  background-color: var(--uber-btn-hover) !important;
  border-color: var(--uber-btn-hover) !important;
  color: #000000 !important;
}

/* Secondary Button: Dark Surface with White Text */
.uber-btn-secondary {
  background-color: #1a1a1a !important;
  color: #ffffff !important;
  border: 1px solid #333333 !important;
}

.uber-btn-secondary:hover {
  background-color: #ffffff !important;
  color: #000000 !important;
  border-color: #ffffff !important;
}

.btn-danger {
  background-color: #1a1a1a !important;
  color: #ff4d4d !important;
  border: 1px solid #3d1a1a !important;
}

.btn-danger:hover {
  background-color: #ff3333 !important;
  color: #ffffff !important;
  border-color: #ff3333 !important;
}

.full-width {
  width: 100%;
}

.btn-sm {
  padding: 10px 18px;
  font-size: 0.8rem;
}

/* Loader */
.uber-loader {
  border: 1px solid var(--uber-white);
  padding: 36px;
  background-color: var(--uber-dark-gray);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid #333333;
  border-top-color: #ffffff;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

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

.loader-heading {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.2px;
  margin-bottom: 4px;
  color: var(--uber-white);
}

.loader-sub {
  font-size: 0.85rem;
  color: var(--uber-text-secondary);
}

/* Subscribe Apps Group */
.subscribe-wrapper {
  margin-top: 32px;
  border-top: 1px solid var(--uber-border);
  padding-top: 24px;
}

.app-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Active Feeds List */
.feeds-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feed-card-item {
  background-color: #141414;
  border: 1px solid var(--uber-border);
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.feed-details {
  flex: 1;
  word-break: break-all;
}

.feed-name {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.2px;
  color: var(--uber-white);
  margin-bottom: 6px;
}

.feed-subtext {
  font-size: 0.8rem;
  color: var(--uber-text-secondary);
  line-height: 1.4;
}

.feed-subtext a {
  color: var(--uber-white);
  text-decoration: underline;
}

.feed-actions {
  display: flex;
  gap: 10px;
}

.empty-state {
  text-align: center;
  color: var(--uber-text-muted);
  padding: 32px 0;
  font-size: 0.9rem;
}

.keepalive-text {
  font-size: 0.9rem;
  color: var(--uber-text-secondary);
  line-height: 1.6;
}

.keepalive-text a {
  color: var(--uber-white);
  text-decoration: underline;
}

/* Footer */
.uber-footer {
  border-top: 1px solid var(--uber-border);
  padding: 32px 24px;
  background-color: var(--uber-black);
}

.footer-container {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
  font-size: 0.85rem;
  color: var(--uber-text-muted);
}

.footer-container a {
  color: var(--uber-white);
  text-decoration: none;
  font-weight: 600;
}

.footer-container a:hover {
  text-decoration: underline;
}

.hidden {
  display: none !important;
}

/* Responsive */
@media (max-width: 640px) {
  .hero-title {
    font-size: 2rem;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .input-action-group {
    flex-direction: column;
  }
  .feed-card-item {
    flex-direction: column;
    align-items: flex-start;
  }
  .feed-actions {
    width: 100%;
  }
  .feed-actions .uber-btn {
    flex: 1;
  }
}