/* === APP SHELL === */
.app-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 5%;
  border-bottom: 1px solid var(--border);
  background: rgba(14,17,23,0.95);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}
.app-nav-brand { display: flex; align-items: center; gap: 0.6rem; }
.app-badge {
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.3);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}
.btn-back {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.btn-back:hover { color: var(--text); }

/* === CONTAINER === */
.app-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 5% 5rem;
}
.app-header { margin-bottom: 2.5rem; }
.app-header h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.app-header p { color: var(--text-muted); font-size: 1rem; }

/* === TABS === */
.app-tabs {
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
  overflow-x: auto;
}
.tab-btn {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

/* === PANELS === */
.app-panel { display: none; }
.app-panel.active { display: block; }
.panel-header { margin-bottom: 1.5rem; }
.panel-header h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.panel-header p { color: var(--text-muted); font-size: 0.9rem; }

/* === FORMS === */
.app-form { display: flex; flex-direction: column; gap: 1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group.full-width { grid-column: 1 / -1; }
.form-group label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.form-group input,
.form-group select {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.65rem 0.85rem;
  transition: border-color 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus {
  border-color: var(--border-teal);
}
.form-group input::placeholder { color: var(--text-faint); }
.form-group select option { background: var(--bg-2); }

/* === BUTTONS === */
.btn-calculate {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--bg);
  background: var(--teal);
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.75rem;
  cursor: pointer;
  width: fit-content;
  transition: background 0.2s, transform 0.1s;
}
.btn-calculate:hover { background: var(--teal-dim); }
.btn-calculate:active { transform: scale(0.98); }

/* === RESULT CARDS === */
.result-card {
  margin-top: 1.5rem;
  background: var(--bg-2);
  border: 1px solid var(--border-teal);
  border-radius: 12px;
  padding: 1.5rem;
}
.result-card h3 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal);
  margin-bottom: 1rem;
}
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}
.result-item { display: flex; flex-direction: column; gap: 0.2rem; }
.result-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.result-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}
.result-value.teal { color: var(--teal); }
.result-value.amber { color: var(--amber); }

/* === LOADING STATE === */
.loading-state {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 2rem 0;
  text-align: center;
}

/* === QPR GRID === */
.qpr-grid { display: flex; flex-direction: column; gap: 1rem; }
.qpr-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
}
.qpr-period {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--teal);
  margin-bottom: 0.75rem;
}
.qpr-meta { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.qpr-stat { display: flex; flex-direction: column; gap: 0.15rem; }
.qpr-stat-label { font-size: 0.68rem; color: var(--text-muted); font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.06em; }
.qpr-stat-value { font-family: var(--font-display); font-size: 1rem; font-weight: 600; color: var(--text); }
.qpr-stat-value.amber { color: var(--amber); }
.qpr-stat-value.teal { color: var(--teal); }
.qpr-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.68rem;
  font-family: var(--font-display);
  padding: 0.25rem 0.6rem;
  border-radius: 99px;
  margin-top: 0.75rem;
}
.qpr-badge.draft { background: rgba(245,158,11,0.1); color: var(--amber); border: 1px solid rgba(245,158,11,0.3); }
.qpr-badge.submitted { background: rgba(0,212,170,0.1); color: var(--teal); border: 1px solid var(--border-teal); }
.qpr-badge.overdue { background: rgba(239,68,68,0.1); color: #ef4444; border: 1px solid rgba(239,68,68,0.3); }

/* === DEADLINE LIST === */
.deadlines-list { display: flex; flex-direction: column; gap: 0.75rem; }
.deadline-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
}
.deadline-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.deadline-dot.teal { background: var(--teal); }
.deadline-dot.amber { background: var(--amber); }
.deadline-dot.red { background: #ef4444; }
.deadline-body { flex: 1; }
.deadline-label {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.15rem;
}
.deadline-sub { font-size: 0.78rem; color: var(--text-muted); }
.deadline-date {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  text-align: right;
  white-space: nowrap;
}
.deadline-days {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: right;
}
.deadline-days.urgent { color: var(--amber); }
.deadline-days.overdue { color: #ef4444; }

/* === SUCCESS / ERROR ALERTS === */
.alert {
  border-radius: 8px;
  padding: 1rem 1.25rem;
  font-size: 0.88rem;
  margin-top: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}
.alert-success { background: rgba(0,212,170,0.08); border: 1px solid var(--border-teal); color: var(--teal); }
.alert-error { background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.3); color: #ef4444; }
.alert-icon { font-size: 1rem; flex-shrink: 0; }

/* === FOOTER === */
.app-footer {
  text-align: center;
  padding: 2rem 5%;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 0.78rem;
  font-family: var(--font-display);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .form-row { grid-template-columns: 1fr; }
  .app-tabs { gap: 0; }
  .tab-btn { padding: 0.65rem 0.85rem; font-size: 0.78rem; }
  .qpr-meta { gap: 1rem; }
  .deadline-date, .deadline-days { text-align: left; }
  .deadline-item { flex-wrap: wrap; }
}