/* ===== APP SHELL ===== */
.app-body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  min-height: 100vh;
}

/* ===== NAV ===== */
.app-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.app-nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.nav-logo-icon {
  color: var(--accent);
  font-size: 20px;
}

.nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-muted);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
}

.nav-link:hover {
  color: var(--fg);
  background: var(--bg-subtle);
}

.nav-link.active {
  color: var(--accent);
  background: var(--accent-glow);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-user {
  font-size: 13px;
  color: var(--fg-muted);
}

/* ===== MAIN ===== */
.app-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* ===== PAGE HEADER ===== */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}

.page-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 4px;
}

.page-sub {
  font-size: 15px;
  color: var(--fg-muted);
}

.accent-text {
  color: var(--accent);
}

/* ===== STATS GRID ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

@media (max-width: 640px) {
  .stats-grid { grid-template-columns: 1fr; }
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: border-color 0.15s;
}

.stat-card:hover {
  border-color: rgba(255,255,255,0.12);
}

.stat-icon {
  font-size: 28px;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--bg-subtle);
  flex-shrink: 0;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--fg);
  line-height: 1;
}

.stat-label {
  font-size: 13px;
  color: var(--fg-muted);
  margin-top: 4px;
}

/* ===== SECTION HEADER ===== */
.section-header {
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--fg);
}

/* ===== FEED ===== */
.feed {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feed-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: border-color 0.15s;
}

.feed-item:hover {
  border-color: rgba(255,255,255,0.1);
}

.feed-icon {
  font-size: 20px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--bg-subtle);
  flex-shrink: 0;
}

.feed-body {
  flex: 1;
  min-width: 0;
}

.feed-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
}

.feed-desc {
  font-size: 13px;
  color: var(--fg-muted);
  margin-top: 2px;
}

.feed-time {
  font-size: 12px;
  color: var(--fg-muted);
  flex-shrink: 0;
}

/* ===== CARD ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 20px;
}

.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }

/* ===== FORMS ===== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-muted);
}

.form-group input,
.form-group textarea {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 15px;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.15s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--fg-muted);
  opacity: 0.6;
}

.form-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 16px;
}

@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
}

.textarea-lg {
  resize: vertical;
  min-height: 120px;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #0a0a0f;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, opacity 0.15s;
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--accent-soft);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-ghost-sm {
  display: inline-flex;
  align-items: center;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 5px 12px;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s;
}

.btn-ghost-sm:hover {
  color: var(--fg);
  border-color: rgba(255,255,255,0.2);
}

.btn-sm-green { color: #4ade80; border-color: rgba(74,222,128,0.3); }
.btn-sm-green:hover { background: rgba(74,222,128,0.08); }

.btn-sm-red { color: #f87171; border-color: rgba(248,113,113,0.3); }
.btn-sm-red:hover { background: rgba(248,113,113,0.08); }

.btn-sm-muted { color: var(--fg-muted); }

.w-full { width: 100%; }

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 100px;
}

.badge--pending {
  background: rgba(232,160,64,0.15);
  color: var(--accent);
  border: 1px solid rgba(232,160,64,0.3);
}

.badge--paid {
  background: rgba(74,222,128,0.1);
  color: #4ade80;
  border: 1px solid rgba(74,222,128,0.25);
}

.badge--overdue {
  background: rgba(248,113,113,0.1);
  color: #f87171;
  border: 1px solid rgba(248,113,113,0.25);
}

.badge--ai {
  background: rgba(168,85,247,0.12);
  color: #c084fc;
  border: 1px solid rgba(168,85,247,0.25);
  font-size: 11px;
}

/* ===== INVOICE LIST ===== */
.invoice-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.invoice-row {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: border-color 0.15s;
}

.invoice-row:hover {
  border-color: rgba(255,255,255,0.1);
}

.invoice-info {
  flex: 1;
  min-width: 0;
}

.invoice-client {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
}

.invoice-desc {
  font-size: 13px;
  color: var(--fg-muted);
  margin-top: 2px;
}

.invoice-due {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 2px;
}

.invoice-amount {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--fg);
  flex-shrink: 0;
  min-width: 100px;
  text-align: right;
}

.invoice-status-wrap {
  flex-shrink: 0;
}

.invoice-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

/* ===== AI PAGE ===== */
.ai-container {
  max-width: 720px;
}

.response-card {
  border-color: rgba(168,85,247,0.2);
}

.response-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.response-header .card-title {
  margin-bottom: 0;
}

.response-body {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

.response-text {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--fg);
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
}

.response-actions {
  display: flex;
  justify-content: flex-end;
}

/* ===== INVOICE FORM ===== */
.invoice-form {
  display: flex;
  flex-direction: column;
}

/* ===== AUTH ===== */
.auth-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 420px;
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  text-decoration: none;
  margin-bottom: 32px;
}

.auth-logo span {
  color: var(--accent);
  font-size: 22px;
}

.auth-title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 8px;
}

.auth-sub {
  font-size: 14px;
  color: var(--fg-muted);
  margin-bottom: 28px;
}

.auth-form {
  display: flex;
  flex-direction: column;
}

.auth-switch {
  margin-top: 24px;
  font-size: 14px;
  color: var(--fg-muted);
  text-align: center;
}

.auth-switch a {
  color: var(--accent);
  text-decoration: none;
}

.auth-switch a:hover {
  text-decoration: underline;
}

/* ===== ALERTS ===== */
.alert-error {
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.25);
  border-radius: 10px;
  color: #f87171;
  font-size: 14px;
  padding: 12px 16px;
  margin-bottom: 16px;
}

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--fg-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.empty-icon {
  font-size: 40px;
  margin-bottom: 16px;
}